Xamarin Forms Two Way Binding

Property Change Notification By default, the target object only receives the value of the source object when the binding is created. A Xamarin Forms Renderer provides the device-specific logic to display a Xamarin Forms control using platform-native UI. The result is a clean, elegant, and potentially toolable representation of a user interface with all the background support in code. How does AngularJs making bind by reference in its directives Posted on January 14, 2018 by Laith Abu Zainih sometimes when i pass variable by reference using ‘=’ in my directive, and update the referenced variable in the parent. Binding Context Always shows the Initial value not the Latest Value. pdf), Text File (. Since we had the developers who came from ASP. Other platforms have similar solutions, so if you are developing in Xamarin Forms, it is a good idea to empower this kind of navigation. In Xamarin. Forms has to analyze and resolve each binding, which can take precious CPU cycles. Create New Xamarin. While creating my game, I recently came across the problem of navigation. 4 has enhanced the Picker view by adding the ability to populate it with data by setting its ItemsSource property, and to retrieve the selected item from the SelectedItem property. WebSockets with ASP. If you want to see my previous posts, please look at. Forms Button that can have its style updated when the IsEnabled is set to false. Inversion of Control (IOC) and Dependency Injection (DI) are common patterns in software development, which help to create loosely coupled dependencies. Text' The viewmodel contains a property named TextPropertyInVm which is what is specified in. Building The Accordion in Xamarin Forms. Forms, the Mode property defaults to OneWay, and can be omitted unless a different BindingMode is required. Now here is how my Functional ViewModel differs, from the standard approach. So I thought it was about time I shared my progress with an update on my TabbedView. At least the two-way binding I know of, is being worked on. mars 10, 2015 binding , control , forms , issue , Picker , problem , XAMARIN 1 Comments If I tell you "ComboBox", you will see quickly of which control I'm talking about. Rob Gibbens. This is done using attribute bind. Hi @redth, in one of our recent releases we've made improvements to the way Realm interops with Xamarin. Xamarin Interview Questions: The developers can use Xamarin tools to write the native Android, iOS and the Window apps with the native user interface. how to have 2 data binding fields in one Xamarin forms label? on the model that combines the two properties. Telerik RadGrid supports automatic extraction of values from the form template. What I am looking to do is if the selected item in a combo box changes, the patient object will be updated through two-way binding as with the text controls. Forms の ListView についてひいひい言って調べましたので共有したいと思います。Binding の書き方などでお役に立てれば嬉しいです。 ListView について Working with ListView - Xamarin や Xamarin. There's no out of the box functionality to create expandable list views in Xamarin Forms. It is part of the. 08/21/2019 +3; Browse code Download ZIP. NET developers. Xamarin Interview Questions: The developers can use Xamarin tools to write the native Android, iOS and the Window apps with the native user interface. Forms allows for easy building of a data fill-in form from a single shared codebase. Forum Thread - DoughnutSeries SelectedDataPointIndex TwoWay Binding - Xamarin. Create a renderer in each platform that will be used to display the custom control and subscribe to property changed notifications. When a binding is established and the data or your business model changes, then it will reflect the updates automatically to the UI elements and vice versa. Accordion in Xamarin Forms illustration. Xamarin already included a default DatePicker. Xamarin Forms supports binding to indexed properties. Forms - ListView Two-Way Binding. It provides more than 40 cross-platform controls and layouts which are mapped to native controls at runtime, which means that your user interfaces are fully native. Cross Local Notifications Xamarin Forms. Binding a POCO class will only give you that though. Adding the SfListView in Xamarin. > Two-way data. GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Xamarin Evolve 2016: MVVM Made Simple with Xamarin. Xamarin Form MVVM First Two way Binding #6 Samir GC. Additionally, you will see Xamarin. > Two-way data. Binding is common context, is the process of mapping a property on a Page, to a property in a view or ViewModel. Forms é o desenvolvimento de UIs móveis onde telas e seus controles, suas imagens, animações e interações do usuário são executadas nativamente. Usually, you will create a native UI for each platform and in the case of Android use the PreferenceActivity to automagically create a settings page from XML (which is magical), but what if you are using Xamarin. Xamarin Forms makes it very easy for developers to extend the API, write your own custom controls, or write custom renderers for controls. Use Xamarin UITest to see how Apps behave on different devices, so you can. That can quickly turn into a pain. New here? Start with our free trials. The result is a clean, elegant, and potentially toolable representation of a user interface with all the background support in code. In Xamarin. A brief and quick example using a ‘login’ form to get you started: View. Tutorial Xamarin con Data Binding Cuando uno mira ejemplos de uso de ciertas tecnologías, normalmente suelen mostrar la forma más sencilla de lograr el objetivo, pero sin reparar en la creación de una arquitectura base que después se pueda considerar válida para una aplicación "productiva". Forms team :)). This demo illustrates how the ASPxGridView control works easily and quickly with a data source consisting of 300,000 records. {Binding CurrentText. You can reuse a user control over and over and the logic is isolated from the general flow of your program. Chapter 18 MVVM 496 property is merely being set to its existing value, and it might even lead to problems involving infinite cycles of recursive property settings in two-way bindings. Forms let you build native UIs for iOS, Android and Windows from a single, shared codebase. Getting started with Prism for Xamarin. NET developer, I love MVVM and data binding. Binding example. I'm rather starting to like doing these look aheads to features coming out in future versions of Xamarin. It has to CheckBoxes and a TextBox (not relavent at this time). Forms applications that target iOS, Android and Windows. Android don't have the binding concept out of the box, ReactiveUI lets you define it via code (MVVMCross does it as well). Hey Subscribers, In this video, I am explaining how you can use MVVM design pattern in Xamarin. So I thought it was about time I shared my progress with an update on my TabbedView. I wanted to improve the transitions between the views when changing tabs. If your project requires slightly different UI per platform to maximize the look and feel of that specific platform, you should go with Xamarin native. RT @s_debruyn: If you're using @MvvmCross and/or Serilog, you can use the sink I created to log everything to @VSAppCenter: https://t. Unfortunately for me, they didn't combine these two to create a. Some best Feature PCL: > 40+pages, layout, and controls > Build from code behind or XAML. php(143) : runtime-created function(1) : eval()'d code(156) : runtime-created. Forms application by creating a login screen where the user can set his username, password and tap the login. Forms DataTemplateSelector. When it comes to binding a source of items and displaying it in a vertical list, the ListView has the same features. Forms, and a custom renderer for each platform will act as a mechanism for abstracting these differences. Use of InotifyPropertyChanged It's an interface which is used for notifying the clients and typically binding the clients that the value of the property has been changed. Hence, I decided to see if I could develop an easy enough way to. It provides more than 40 cross-platform controls and layouts which are mapped to native controls at runtime, which means that your user interfaces are fully native. In another post I already focused on how to use bindings for data entry, be sure to read that one to get more insight into data binding under iOS with MVVM Light. Forms or Xamarin Native) using the shake gesture – allowing us to execute it within the context of the current view we are in whether native or in forms, and then from there execute any bit of code we want!. ReactiveUI isn’t an all or nothing framework. Forms project. Forms projects; NControl - Xamarin. The displayed properties of each item can also be automatically refreshed. Let's get familiar with two important keywords you will see in the XAMLs. Forms elements map to Two-way Data Binding!!! Navigation!. Create a renderer in each platform that will be used to display the custom control and subscribe to property changed notifications. Loading Unsubscribe from Samir GC? Xamarin Form MVVM Binding Entry and Button #8 - Duration: 4:35. Forms but if you search a little, you will find the "Picker " control. To enable the usage of data binding in your Android application, add the following snippet to the app/build. Take advantage of the. The most disturbing questions you get are. When a callback is used in an expression, data binding automatically creates the necessary listener and registers it for the event. DataSource=datatable; It seems the binding is a two-way binding--changes to the datatable are automatically reflected on the spread and changes on the spread are automatically pushed back to the datatable. When a binding is established and the data or your business model changes, then it will reflect the updates automatically to the UI elements and vice versa. NET Grid View (ASPxGridView) to a large data set, because only small portions of the data are loaded on demand. Samir GC 679 views. Vertical List. Better Two-Way Data Binding A better approach to two-way data binding would be to allow for a property to be bound to one or more elements. Configuring two-way data binding Binding data to a view via code or XAML is easy; nothing special is needed to present data from an object to the view. Whenever I bind to a string type, the two way binding works because the text property has a string type (they match). Data binding. The key to establishing a relationship between two properties is to listen to the source property’s changes. I take for granted that you are a Visual Studio user, that you use Git using the Visual Studio plugin and, like me, have the need to work on projects where you need to share code hosted in its own separate repository among different. There are two ways in Xamarin. ReactiveActivity), or implement IViewFor on your View and ensure that your ViewModel signals changes. Binding Modes. Our user control will be a composition of two standard XF controls: a Label control and an Entry control. Hence, I decided to see if I could develop an easy enough way to. In this series I talk about small tips and tricks to build good mobile apps with Xamarin Forms. Please log on to our support website to check for further updates. Anyone know if there is there support for Two Way DataBinding? For example, can I bind the "value" of the Stepper control to a Property so that when I move it up/down it changes the value?. Traditionally this was done using the ViewRenderer base class. Forms binding engine we can update the display of our controls based on the view-models. 0 the team introduced an official pattern to specify design time properties, controls, or just about anything else. Pull requests 0. A message is the communication unit in the form of an envelope for the transmission of the data from the client to Service and Service to the client and has two sections: Header, Body. When a message is handled the bindings are re-evaluated and the UI updates using the normal Xamarin. Forms ListView. co/Vx… 2 months ago RT @ Cheesebaron : Just released a new version 4. Forms only allows loading the compiled XAML into its “owning” view, using the LoadFromXaml(this TView view, Type callingType) extension method from the Xamarin. Forms (Xamarin. Device Orientation - Simple way to get device orientation or be notified of orientation changes in your Xamarin. Follow Channel 9 to never miss another show. This means that apps can share a large portion of their graphical user interface and still retain the native look and feel of the target platform. The latest versions of both will allow you to create apps with a. In this article, I will show you how to bind Control property to Control property binding in Xamarin. Forms applications that target iOS, Android and Windows. Forms framework - xamarin/xamarin-forms. Hello, I am very pleased to see the support for two-way binding introduced for the WPF spreadsheet control. I suspect I'm just missing a key concept. As in regular binding expressions, you still get null and thread safety of data binding while these listener expressions are being evaluated. This might sound quite like Xamarin. Forms, or even built an app with it, you might have noticed that Forms has everything to implement the MVVM framework. You can reuse a user control over and over and the logic is isolated from the general flow of your program. This supports the use of architectural patterns like the MVVM pattern. The result is a clean, elegant, and potentially toolable representation of a user interface with all the background support in code. Xamarin Forms UWP. This means that you can give your custom controls new functionality with the built-in data binding system in Xamarin. Forms Solution. The Xamarin Forms version of Contoso Cookbook features two pages. With Xamarin. Forms is already equipped with data-binding, commands and dependency injection which are some MVVM ingredients we will look at in this article. Shell provides you a single place to configure your app visual structure, a common navigation user interface & a navigation service with deep linking support. Forms MessagingCenter. Forms; namespace Common. In this case, it is required to use the DataBinder. I am new to WPF and binding, and with windows forms, I would have trapped the selection changed event and made the change in there. Two Approach are used in Xamarin. The displayed properties of each item can also be automatically refreshed. Nick Randolph investigates the inner workings of the new compiled data binding support available to Windows platform developers in the Universal Windows Platform. It’s really cool tracing through the source code to see how a new feature is being implemented and coming together. As for Xamarin, it involves a stricter MVVM architecture with two-way data-binding that more developers are familiar with, which provides perfect teamwork conditions (multiple departments can take part in the development process simultaneously — e. Forms, and Telerik Xamarin. Data Binding. Take advantage of the. In addition, the color of the text for the selected item can be changed by setting the TextColor property to a Color. 0 tenemos acceso a nuevas plataformas: • Linux (GTK#) • WPF 9. forms I was trying two way databinding but when it comes to binding with interger property which is nullable it doesnt update viewmodel from view Canany one please tell me how to handle that What I have tried: //View. Forms MessagingCenter. The form entered values are not showing in the Binding context. There's no out of the box functionality to create expandable list views in Xamarin Forms. Forms XAML Control Properties Comments (3) | Share Xamarin. You can bind a specific cell range in a worksheet to a data source or use a cell range as a data source for any DevExpress or third-party data-aware control (Data Grid, Chart Control, etc. One of the Xamarin Forms pillars, is data-binding. This article will assume you have basic knowledge of C# and Xamarin Forms and shows how to implement the Xamarin Form Validations using simple Data Annotations applied on the models. The ResourceDictionary is located in the Resources property. There's no out of the box functionality to create expandable list views in Xamarin Forms. going to take a look at how to create a custom binding to a ContentView within Xamarin Forms. Set this value to the native event’s name. Auto Generate Forms the Easy way in ASP. Using the MVVM pattern with a Xamarin Forms mobile app. Some Common Xamarin. In two-way data binding, any changes in the Model gets reflected in the View and similarly any changes in the View gets reflected in the View automatically. Hi @redth, in one of our recent releases we’ve made improvements to the way Realm interops with Xamarin. Binding example. I have been unable to bind the user control to the property name in my view model unless the view model property name is exactly the same as the property in the user control. Pull requests 0. Forms is an open source mobile UI framework from Microsoft for building iOS, Android, & Windows apps with. Forms and Prism. Forms, the Mode property defaults to OneWay, and can be omitted unless a different BindingMode is required. Functional ViewModels In Xamarin. Accordion in Xamarin Forms illustration. I am using Xamarin. This supports the use of architectural patterns like the MVVM pattern. Forms will get you up and running in no time. Forms Binding Mode. Building Native Android, iOS, & Windows apps with Xamarin. Forms así como a las novedades que llegarán en los próximos meses. Forms Solution in Xamarin Studio 2m Creating a Simple Xamarin. I would like to bind the CheckBoxes's Checked property with the properties in my control. Forms は、クロスプラットフォームのネイティブ UI (ユーザー インターフェース) の開発を支援する抽象化レイヤーを提供し、開発者は Xamarin. WebSockets provide near-instant, two-way communication between servers and client apps. Bug 49237 - Bindable two way target property: 'Xamarin. It has to CheckBoxes and a TextBox (not relavent at this time). Xamarin Forms supports binding to indexed properties. When it comes to binding a source of items and displaying it in a vertical list, the ListView has the same features. It is also possible to bind, not to a standard data source, but rather to another element on the page. Forms MessagingCenter. Functional ViewModel. 0 and higher. Forms in the ViewModel a “suggestion” rather than a “rule. Forms framework - xamarin/xamarin-forms. Editor's note: The following post was written by Visual Studios and Development Technologies MVP Houssem Dellai as part of our Technical Tuesday series. I am new to WPF and binding, and with windows forms, I would have trapped the selection changed event and made the change in there. Forms using the very intuitive MTADAL plugin or writing directly the code in your app. Configuring two-way data binding Binding data to a view via code or XAML is easy; nothing special is needed to present data from an object to the view. Forms control with bindable properties. Notice: Undefined index: HTTP_REFERER in /home/yq2sw6g6/loja. Create your own custom Xamarin. This is called OneWay binding. LinkedIn emplea cookies para mejorar la funcionalidad y el rendimiento de nuestro sitio web, así como para ofrecer publicidad relevante. In this article. Android don't have the binding concept out of the box, ReactiveUI lets you define it via code (MVVMCross does it as well). php(143) : runtime-created function(1) : eval()'d. Forms to support the latest GooglePlayServices. 0 tenemos acceso a nuevas plataformas: • Linux (GTK#) • WPF 9. To specify two-way binding, make sure to include the "Mode=TwoWay" attribute within the binding definition. Yeah many of the examples are just really really bad practice imo. Forms ü Two-way data binding ü Navigation. I am trying to bind the text of a button with the Property,It's binding fine for the first time but next time onwards it's not updating even it's been updated. Android offers support to write declarative layouts using data binding. Barcode ★20 - Xamarin. Rows = " {Binding DataRows}" // 数据源 固定 写法 对应 后端代码 datagrid. Forms and Prism. Forms XAML Control Properties Comments (3) | Share Xamarin. The goal in this example is to two-way bind TheText property of the ViewModel to the TextBox and one-way bind TheText property to the TextBlock, so the TextBlock updates when the user types text into the TextBox. Binding is common context, is the process of mapping a property on a Page, to a property in a view or ViewModel. This supports the use of architectural patterns like the MVVM pattern. Let's create a simple data table with Order details data. The ListView control shouldn't be confused with the TableView control. Sweet! Now through the magic of the Xamarin. Creating Mobile Apps With Xamarin. In Xamarin Forms(PCL) are use XAML to provide developer to implement user interface. Property binding to bind expression to value property of the input element. Databinding a ListView - Part 2 - Writing a Xamarin. Forms the mode property is set to OneWay by default. Note: Matt Soucoup has been awesome helping me break my mental barrier to using services in a MVVM design pattern. export class App { constructor() { this. The native control in WPF is a lot more limited and is missing two big features – no system provided transport controls, and no support for HTTPS sources. There's no out of the box functionality to create expandable list views in Xamarin Forms. 0 tenemos acceso a nuevas plataformas: • Linux (GTK#) • WPF 9. Data binding is of two types − one-way data binding and two-way data binding. Forms は、クロスプラットフォームのネイティブ UI (ユーザー インターフェース) の開発を支援する抽象化レイヤーを提供し、開発者は Xamarin. Forms How to use Resources to eliminate repeated XAML Remove hard-coded values (fonts, colors) and define them as resources Consolidate groups of property values into Styles 5. Forms label height by amount of text - ITextMeter. Two Way Binding. Create New Xamarin. OneWayToSource is another option, and you can think of it as the reverse of OneWay binding. Xamarin Forms uses XAML for UI development, which provides access to two way databinding. Binding concatenated text and value in XAML or View. Getting Started with Xamarin ListView (SfListView) This section provides a quick overview for getting started with the SfListView for Xamarin. Infragistics Ultimate UI Control Configurators - WPF and Xamarin. Unfortunately this won't work in some. Forms を使用して、Android、iOS、Windows Phone 間で共有可能な UI を簡単に作成できます。. Forms App Start here: Part 1 - Sara can has MVVM for what I'm building in this series. 0 the team introduced an official pattern to specify design time properties, controls, or just about anything else. But do you know how to trigger a PropertyChanged event on such a property so that the binding engine gets the updated value? Binding to indexed properties. Forms — Part 1. Forms projects ManageSleep ★5 - Manage auto sleep / auto lock in all platforms. NET developer, I love MVVM and data binding. Forms é o desenvolvimento de UIs móveis onde telas e seus controles, suas imagens, animações e interações do usuário são executadas nativamente. In this article. xamarin-forms Adding a Windows Phone Project to an Existing Xamarin. The default binding mode of UWP is One-Way. Infragistics Ultimate UI for Xamarin Control Configurators provide visual configuration of rich controls like charts, gauges, and the data grid right in the XAML editor, shaving hours off your development time. Having worked with Xamarin Forms for 3 years I understand the confusion some get when starting with Flutter. Forms to support the latest GooglePlayServices. #DotNet2018 Hola Linux! Desde Xamarin. I am wondering if there is a way to specify one-time binding. Binding adalah mengaitkan data yang ada pada data source (sumber data) ke kontrol tertentu. Resources and Styles in Xamarin. I'm working in a Xamarin Form Project. Forms ListView. DataSource property. You can use two-way data binding when you need to handle user input. To resolve this problem, Angular provides two-way data binding. The Xamarin Forms version of Contoso Cookbook features two pages. Configure your controls and bind data directly from XAML files with pre-built styles and. #DotNet2018 Hola Linux! Desde Xamarin. Forms application. Getting Started in Xamarin. The usual disclaimer still applies here; although this is an MVVM Cross post, the contents of it should be applicable for any MVVM Framework or, in fact, […]. Binding Modes. Calculate Xamarin. Android and iOS have no built-in data binding support, although you can use a third party framework like MvvmCross to accomplish this. Is there any Addition configurations to enable 2 way binding. I don't know what I did wrong, because I get no errors in the files. Each mobile platform provides a mechanism to alert users that the app is busy doing some work. O principal foco do Xamarin. Forms comes with a powerful data binding engine that allows properties (and events) of controls to be bound to (special) properties and actions of various classes. Mugen MVVM Toolkit makes it easier to develop cross-platform application using the Model-View-ViewModel design pattern. OneWayToSource Changes are made from the target to the source and are mainly used for read-only bindable properties. NET Framework projects. Getting started with Prism for Xamarin. ContentPresenter - marks where the control template owner page/view will display its content. Forms así como a las novedades que llegarán en los próximos meses. Usually, you will create a native UI for each platform and in the case of Android use the PreferenceActivity to automagically create a settings page from XML (which is magical), but what if you are using Xamarin. motherboard = false;. Xamarin Dev Days Madrid 2017, un vistazo a Xamarin. This release updates several of the nuget packages referenced by Xamarin. > Two-way data. Forms framework - xamarin/xamarin-forms. Usually, you will create a native UI for each platform and in the case of Android use the PreferenceActivity to automagically create a settings page from XML (which is magical), but what if you are using Xamarin. That's because of the way Flutter Pages are created. Basic Understanding How Data Binding and MVVM works in Xamarin Forms Here are some simple insights about Data Binding and MVVM. Xamarin Forms with Visual Studio Part 12 [MVVM DataBinding] Houssem Dellai MVVM & Data Binding with Xamarin. Data Binding in Xamarin. Use Xamarin UITest to see how Apps behave on different devices, so you can. A quick search on Google returns quite a few examples of how to achieve this using custom renderers. Continuing from my last post on macOS, there is now a MediaElement renderer for WPF in InTheHand. Auto Generate Forms the Easy way in ASP. Unfortunately for me, they didn't combine these two to create a. You can use two-way data binding when you need to handle user input. Creating Mobile Apps With Xamarin. And the binding doesn’t need to only go one direction! There’s a new argument called UpdateSourceEventName. Join a community of over 2. This is useful when dealing with long running processes. In this article, I will show you a few cool. Xamarin Evolve 2016: MVVM Made Simple with Xamarin. Configuring two-way data binding Binding data to a view via code or XAML is easy; nothing special is needed to present data from an object to the view. Adding the SfListView in Xamarin. Continuing on the data binding topic we discussed in a previous section, it has been one of the important features of AngularJS 1. com In Two-way binding, the changes are made in both the directions and Two-way binding makes sure that the source and the target are always synchronized. iOS In this post I will show how to create a two-way binding from a textfield to a property in the viewmodel, using MvvmLight. Text), but it shouldn't raise this exception since by default, the TextBlock. In this tutorial we will see how we can bind data to xamarin forms. Sample apps built using the Xamarin. The beginning. txt) or read online for free. Each mobile platform provides a mechanism to alert users that the app is busy doing some work. New here? Start with our free trials. 0 tenemos acceso a nuevas plataformas: • Linux (GTK#) • WPF 9. Binding is common context, is the process of mapping a property on a Page, to a property in a view or ViewModel. Introduction to Xamarin for Visual Studio. The fact-checkers, whose work is more and more important for those who prefer facts over lies, police the line between fact and falsehood on a day-to-day basis, and do a great job. Today, my small contribution is to pass along a very good overview that reflects on one of Trump’s favorite overarching falsehoods. Namely: Trump describes an America in which everything was going down the tubes under  Obama, which is why we needed Trump to make America great again. And he claims that this project has come to fruition, with America setting records for prosperity under his leadership and guidance. “Obama bad; Trump good” is pretty much his analysis in all areas and measurement of U.S. activity, especially economically. Even if this were true, it would reflect poorly on Trump’s character, but it has the added problem of being false, a big lie made up of many small ones. Personally, I don’t assume that all economic measurements directly reflect the leadership of whoever occupies the Oval Office, nor am I smart enough to figure out what causes what in the economy. But the idea that presidents get the credit or the blame for the economy during their tenure is a political fact of life. Trump, in his adorable, immodest mendacity, not only claims credit for everything good that happens in the economy, but tells people, literally and specifically, that they have to vote for him even if they hate him, because without his guidance, their 401(k) accounts “will go down the tubes.” That would be offensive even if it were true, but it is utterly false. The stock market has been on a 10-year run of steady gains that began in 2009, the year Barack Obama was inaugurated. But why would anyone care about that? It’s only an unarguable, stubborn fact. Still, speaking of facts, there are so many measurements and indicators of how the economy is doing, that those not committed to an honest investigation can find evidence for whatever they want to believe. Trump and his most committed followers want to believe that everything was terrible under Barack Obama and great under Trump. That’s baloney. Anyone who believes that believes something false. And a series of charts and graphs published Monday in the Washington Post and explained by Economics Correspondent Heather Long provides the data that tells the tale. The details are complicated. Click through to the link above and you’ll learn much. But the overview is pretty simply this: The U.S. economy had a major meltdown in the last year of the George W. Bush presidency. Again, I’m not smart enough to know how much of this was Bush’s “fault.” But he had been in office for six years when the trouble started. So, if it’s ever reasonable to hold a president accountable for the performance of the economy, the timeline is bad for Bush. GDP growth went negative. Job growth fell sharply and then went negative. Median household income shrank. The Dow Jones Industrial Average dropped by more than 5,000 points! U.S. manufacturing output plunged, as did average home values, as did average hourly wages, as did measures of consumer confidence and most other indicators of economic health. (Backup for that is contained in the Post piece I linked to above.) Barack Obama inherited that mess of falling numbers, which continued during his first year in office, 2009, as he put in place policies designed to turn it around. By 2010, Obama’s second year, pretty much all of the negative numbers had turned positive. By the time Obama was up for reelection in 2012, all of them were headed in the right direction, which is certainly among the reasons voters gave him a second term by a solid (not landslide) margin. Basically, all of those good numbers continued throughout the second Obama term. The U.S. GDP, probably the single best measure of how the economy is doing, grew by 2.9 percent in 2015, which was Obama’s seventh year in office and was the best GDP growth number since before the crash of the late Bush years. GDP growth slowed to 1.6 percent in 2016, which may have been among the indicators that supported Trump’s campaign-year argument that everything was going to hell and only he could fix it. During the first year of Trump, GDP growth grew to 2.4 percent, which is decent but not great and anyway, a reasonable person would acknowledge that — to the degree that economic performance is to the credit or blame of the president — the performance in the first year of a new president is a mixture of the old and new policies. In Trump’s second year, 2018, the GDP grew 2.9 percent, equaling Obama’s best year, and so far in 2019, the growth rate has fallen to 2.1 percent, a mediocre number and a decline for which Trump presumably accepts no responsibility and blames either Nancy Pelosi, Ilhan Omar or, if he can swing it, Barack Obama. I suppose it’s natural for a president to want to take credit for everything good that happens on his (or someday her) watch, but not the blame for anything bad. Trump is more blatant about this than most. If we judge by his bad but remarkably steady approval ratings (today, according to the average maintained by 538.com, it’s 41.9 approval/ 53.7 disapproval) the pretty-good economy is not winning him new supporters, nor is his constant exaggeration of his accomplishments costing him many old ones). I already offered it above, but the full Washington Post workup of these numbers, and commentary/explanation by economics correspondent Heather Long, are here. On a related matter, if you care about what used to be called fiscal conservatism, which is the belief that federal debt and deficit matter, here’s a New York Times analysis, based on Congressional Budget Office data, suggesting that the annual budget deficit (that’s the amount the government borrows every year reflecting that amount by which federal spending exceeds revenues) which fell steadily during the Obama years, from a peak of $1.4 trillion at the beginning of the Obama administration, to $585 billion in 2016 (Obama’s last year in office), will be back up to $960 billion this fiscal year, and back over $1 trillion in 2020. (Here’s the New York Times piece detailing those numbers.) Trump is currently floating various tax cuts for the rich and the poor that will presumably worsen those projections, if passed. As the Times piece reported: