dispatcher

I'm currently using an observable collection to store my data objects for a ListView. Adding new objects to the collection works just fine, and the listView updates properly. However when I try to change one of the properties of an object in the collection the listView will not update properly. For example, I have an observable collection DataCollection. I try _DataCollections.ElementAt(count).Status = "Active"; I perform this change before a long operation due to a button press. The listView will not reflect the change. So I add myListView.Items.Refresh() ;. This works, however the listView

I just realized in a C# .Net 4.0 WPF background thread that this doesn't work (compiler error): Dispatcher.Invoke(DispatcherPriority.Normal, delegate() { // do stuff to UI }); From some examples I found out that it had to be casted like this: (Action)delegate() . However, in other examples it is casted to other classes, e.g. System.Windows.Forms.MethodInvoker . Can anybody tell me what exactly is wrong with the example above? I also tried to reproduce it with other methods, but it was always working without casting: delegate void MyAction(); void Method1(MyAction a) { // do stuff } void

I need to use callback function to do some post procesing tasks when the function started with the Dispatcher.BeginInvoke finishes. However i could not find any parameter in Dispatcher.BeginInvoke to accept a callback. Is it possible to give a callback function to Dispatcher.BeginInvoke? The DispatcherOperation object returned by BeginInvoke has a Completed event on it. Subscribe to that to perform operations upon completion: var dispatcherOp = Dispatcher.BeginInvoke( /* your method here */); dispatcherOp.Completed += (s, e) => { /* callback code here */ }; There's a chance the operation will

该文档主要记录SpringMVC-Maven 搭建及发布到Tomcat7操作流程 Round 1: 使用Eclipse创建Maven项目 创建名称SpringMVC-studyDemo的Maven项目 其中index.jsp报错，错误信息：Multiple annotations found at this line: - The superclass 意思是缺少servlet包，我们可以导入javax.servlet-api-3.1.0.jar包. 只需要在pom.xml中添加依赖即可 <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> <!--有关jar包 依赖 可登录http://mvnrepository.com/ 查询对应jar包--> </dependency> Round 2: 引入Spring MVC 这里主要是在pom.xml中增加对Spring的依赖 <properties> <spring.version>5.0.8.RELEASE</spring.version> </properties> <dependency> <groupId>org.springframework<

I'm call a .net 4.0 dll from a vb6 app using com interop. In .net I create an xps document, via a xaml fixed document and save it to disk. This causes and memory leak and I've found a great solution here. Saving a FixedDocument to an XPS file causes memory leak The solution above, that worked for me, involves this line of code: Dispatcher.CurrentDispatcher.Invoke(DispatcherPriority.SystemIdle, new DispatcherOperationCallback(delegate { return null; }), null); What exactly is happening with this line of code. Is that by setting the delegate to null this disposes the Dispatcher object? While it

I need to run some part of application in background and allow user to update the UI while the sub is running in the background. I searched and I found out that in WPF I should use Dispatcher. Problem is even when I use dispatcher still my GUI is not usable till the all subs will finish. I attached a code here so you can have better perspective of what I mean. For example in this code when a user run the application, system should run a new thread that will change the text of first textbox while use can update the text of the second textbox. I am wondering if I am doing this right or not. Can