GridLengthConverter Class
Converts instances of other types to and from GridLength instances.
Assembly: PresentationFramework (in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation
The following example shows how to create and use an instance of GridLengthConverter. The example defines a custom method called changeCol, which passes the ListBoxItem to a GridLengthConverter that converts the Content of a ListBoxItem to an instance of GridLength. The converted value is then passed back as the value of the Width property of the ColumnDefinition element.
The example also defines a second custom method, called changeColVal. This custom method converts the Value of a Slider to a String and then passes that value back to the ColumnDefinition as the Width of the element.
Note that a separate Extensible Application Markup Language (XAML) file defines the contents of a ListBoxItem.
To view the complete sample, including the related XAML file, see GridLengthConverter Object Sample.
Private Sub changeColVal(ByVal sender As Object, ByVal args As RoutedPropertyChangedEventArgs(Of Double)) txt1.Text = "Current Grid Column is " + hs1.Value.ToString() End Sub Private Sub changeCol(ByVal sender As Object, ByVal args As SelectionChangedEventArgs) Dim li1 As ListBoxItem = CType(CType(sender, ListBox).SelectedItem, ListBoxItem) Dim myGridLengthConverter As System.Windows.GridLengthConverter = New System.Windows.GridLengthConverter() If (hs1.Value = 0) Then Dim gl1 As GridLength = CType(myGridLengthConverter.ConvertFromString(li1.Content.ToString()), GridLength) col1.Width = gl1 ElseIf (hs1.Value = 1) Then Dim gl2 As GridLength = CType(myGridLengthConverter.ConvertFromString(li1.Content.ToString()), GridLength) col2.Width = gl2 ElseIf (hs1.Value = 2) Then Dim gl3 As GridLength = CType(myGridLengthConverter.ConvertFromString(li1.Content.ToString()), GridLength) col3.Width = gl3 End If End Sub
Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.