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Remember, if you re performing a time-consuming background operation, you need to perform this operation on a separate thread and then marshal its result to the dispatcher thread (at which point you ll update the user interface or change a shared object). It makes no sense to perform your time-consuming code in the method that you pass to BeginInvoke(). For example, this slightly rearranged code still works but is impractical: Private Sub UpdateTextRight() ' Get the dispatcher from the current page, and use it to invoke ' the update code. Me.Dispatcher.BeginInvoke(AddressOf SetText) End Sub Private Sub SetText() ' Simulate some work taking place with a five-second delay. Thread.Sleep(TimeSpan.FromSeconds(5)) txt.Text = "Here is some new text." End Sub The problem here is that all the work takes place on the dispatcher thread. That means this code ties up the dispatcher in the same way a non-multithreaded application would. asp.net qr code ASP . NET MVC QRCode Demo - Demos - Telerik This sample demonstrates the core functionality of ASP . NET MVC QRCodewhich helps you easily encode large amounts of data in a machine readableformat. asp.net create qr code QR Code generation in ASP . NET MVC - Stack Overflow I wrote a basic HTML helper method to emit the correct <img> tag to takeadvantage of Google's API. So, on your page (assuming ASPX view ... multiple columns. Here s the code you need to add to the WrapPanel class to define an Orientation property that uses the data type System.Windows.Controls.Orientation: Public Shared ReadOnly OrientationProperty As DependencyProperty = _ DependencyProperty.Register("Orientation", GetType(Orientation), _ GetType(WrapPanel), New PropertyMetadata(Orientation.Horizontal)) This code uses one minor time-saver. Rather than define the DependencyProperty and register it with code in a shared constructor, this definition takes care of the definition and registration (and the compiled code doesn t change). It also sets the default value to Orientation.Horizontal. Next, you need to add the property wrapper, which is perfectly straightforward: Public Property Orientation() As Orientation Get Return CType(GetValue(OrientationProperty), Orientation) End Get Set(ByVal value As Orientation) SetValue(OrientationProperty, value) End Set End Property Finally, you can add code to the WrapPanel that actually uses the Orientation property. In this case, you need code in the MeasureOverride() and ArrangeOverride() methods that performs the different types of layout: Protected Overrides Function MeasureOverride(ByVal constraint As Size) As Size Dim currentLineSize As New Size() Dim panelSize As New Size() If Orientation <> Orientation.Horizontal Then ... Else ... 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TAGs: ASP . asp.net create qr code ASP . NET MVC QRCode Demo - Demos - Telerik This sample demonstrates the core functionality of ASP . NET MVC QRCodewhich helps you easily encode large amounts of data in a machine readableformat. The previous example shows how you can update the user interface directly from a background thread. However, this approach isn t ideal. It creates complex, tightly coupled applications that mingle the code for performing a task with the code for displaying data. The result is an application that s more complex, less flexible, and difficult to change. For example, if you change the name of the text box in the previous example, or replace it with a different control, you ll also need to revise your threading code. A better approach is to create a thread that passes information back to the main application and lets the application take care of the display details. 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