Contains Column? : Grid Operation « Windows Presentation Foundation « VB.Net Tutorial

1. VB.Net Tutorial
2. Windows Presentation Foundation
3. Grid Operation

<Window  
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Class="columndefinitions_grid.Window1"
    Title="ColumnDefinitions Sample">
    <Border BorderBrush="Black" Background="White" BorderThickness="2">
  <DockPanel Margin="10,0,0,0">
    <TextBlock FontSize="20" FontWeight="Bold" DockPanel.Dock="Top">Grid Column and Row Collections</TextBlock>
        <Grid DockPanel.Dock="Top" HorizontalAlignment="Left" Name="grid1" ShowGridLines="true" Width="625" Height="400">
          <Grid.ColumnDefinitions>
            <ColumnDefinition/>
            <ColumnDefinition/>
            <ColumnDefinition/>
          </Grid.ColumnDefinitions>
          <Grid.RowDefinitions>
          <RowDefinition/>
            <RowDefinition/>
            <RowDefinition/>
          </Grid.RowDefinitions>
        </Grid>

        <StackPanel HorizontalAlignment="Left" Orientation="Horizontal" Width="625" DockPanel.Dock="Top">
            <Button Width="125" Click="containsCol">Contains Column?</Button>
        </StackPanel>    

  </DockPanel>
  </Border>  
</Window>

//File:Window.xaml.vb

Imports System
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Documents

Namespace columndefinitions_grid
  Public Partial Class Window1
    Inherits Window
    Private rowDef1 As RowDefinition
    Private colDef1 As ColumnDefinition


    Private Sub containsCol(sender As Object, e As RoutedEventArgs)
      colDef1 = New ColumnDefinition()
      grid1.ColumnDefinitions.Insert(grid1.ColumnDefinitions.Count, colDef1)
      Console.WriteLine(grid1.ColumnDefinitions.IndexOf(colDef1).ToString())
      If grid1.ColumnDefinitions.Contains(colDef1) Then
        Console.WriteLine("Grid Contains ColumnDefinition colDef1")
      Else
        Console.WriteLine("Grid Does Not Contain ColumnDefinition colDef1")
      End If
    End Sub
  End Class
End Namespace

16.35.Grid Operation
	16.35.1.	Add a ColumnDefinition to Grid
	16.35.2.	Add a RowDefinition to Grid
	16.35.3.	Clear All Columns
	16.35.4.	Clear All Rows
	16.35.5.	Remove One Column
	16.35.6.	Remove One Row
	16.35.7.	The current number of Columns
	16.35.8.	The current number of Rows
	16.35.9.	Remove 5 Columns with ColumnDefinitions.RemoveRange
	16.35.10.	Remove 5 Row with RowDefinitions.RemoveRange
	16.35.11.	Contains Row
	16.35.12.	Contains Column?
	16.35.13.	Insert Row
	16.35.14.	Insert Column
	16.35.15.	Set control to specific row and column in code