Validate an Item in an ItemsControl Sample

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This sample validates items in an ItemsControl by using the ItemsControl.ItemBindingGroup property. A BindingGroup contains multiple Binding objects and ValidationRule objects. When a ValidationRule that belongs to a BindingGroup runs, the Validate method can get the value of each binding in the BindingGroup. When the BindingExpressions is set to the ItemsControl.ItemBindingGroup property, each item container gets a BindingGroup that has the same ValidationRule objects as the ItemsControl.ItemBindingGroup, but the properties that describe the data in the bindings, such as Items and BindingExpressions, are specific to the data for each item in the ItemsControl.

Building the Sample

  • Install the Windows Software Development Kit (SDK) and open its build environment command window. On the Start menu, point to All Programs, Microsoft Windows SDK, and then click CMD Shell.

  • Download the sample, usually from the software development kit (SDK) documentation, to your hard disk drive.

  • To build the sample from the build environment command window, go to the source directory of the sample. At the command prompt, type MSBUILD.

  • To build the sample in Microsoft Visual Studio, load the sample solution or project file and then press CTRL+SHIFT+B.

Running the Sample

  • To run the compiled sample from the build environment command window, execute the .exe file in the Bin\Debug or Bin\Release folder contained under the sample source code folder.

  • To run the compiled sample with debugging in Visual Studio, press F5.