ColumnDefinition Class
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ColumnDefinition Class

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Defines column-specific properties that apply to Grid objects.


Namespace:  System.Windows.Controls
Assembly:  System.Windows (in System.Windows.dll)
XMLNS for XAML: Not mapped to an xmlns.

public sealed class ColumnDefinition : DependencyObject
<ColumnDefinition .../>

The ColumnDefinition type exposes the following members.

Public methodColumnDefinitionInitializes a new instance of the ColumnDefinition class.

Public propertyActualWidthGets a value that represents the actual calculated width of a ColumnDefinition.
Public propertyDispatcherGets the Dispatcher this object is associated with. (Inherited from DependencyObject.)
Public propertyMaxWidthGets or sets a value that represents the maximum width of a ColumnDefinition.
Public propertyMinWidthGets or sets a value that represents the minimum width of a ColumnDefinition.
Public propertyWidthGets the calculated width of a ColumnDefinition element, or sets the GridLength value of a column that is defined by the ColumnDefinition.

Public methodCheckAccessDetermines whether the calling thread has access to this object. (Inherited from DependencyObject.)
Public methodClearValueClears the local value of a dependency property. (Inherited from DependencyObject.)
Public methodEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetAnimationBaseValueReturns any base value established for a Windows Phone dependency property, which would apply in cases where an animation is not active. (Inherited from DependencyObject.)
Public methodGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodGetValueReturns the current effective value of a dependency property from a DependencyObject. (Inherited from DependencyObject.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodReadLocalValueReturns the local value of a dependency property, if a local value is set. (Inherited from DependencyObject.)
Public methodSetValueSets the local value of a dependency property on a DependencyObject. (Inherited from DependencyObject.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)

Public fieldStatic memberMaxWidthPropertyIdentifies the MaxWidth dependency property.
Public fieldStatic memberMinWidthPropertyIdentifies the MinWidth dependency property.
Public fieldStatic memberWidthPropertyIdentifies the Width dependency property.

You can set a ColumnDefinition for each column in a Grid. If you do not specify a ColumnDefinition, by default the Grid will contain a single column with star sized width.

To set a group of ColumnDefinition elements by using code, add the ColumnDefinition to a ColumnDefinitionCollection.

ColumnDefinition uses a GridLength structure to describe its width characteristics. GridLength allows a ColumnDefinition to support variable distribution of available space.

The following example uses three ColumnDefinitions and three RowDefinitions to create a grid that has nine cells, such as in a worksheet. Each cell contains a TextBlock element that represents data, and the top row contains a TextBlock with the ColumnSpan property applied. To show the boundaries of each cell, the ShowGridLines property is enabled.

<Grid Background="Transparent" VerticalAlignment="Top" HorizontalAlignment="Left" ShowGridLines="True" Width="350" Height="200">
        <ColumnDefinition />
        <ColumnDefinition />
        <ColumnDefinition />
        <RowDefinition />
        <RowDefinition />
        <RowDefinition />
        <RowDefinition />

    <TextBlock HorizontalAlignment="Center" VerticalAlignment="Center" FontSize="20" FontWeight="Bold" Grid.ColumnSpan="3" Grid.Row="0">Expenses for 2007</TextBlock>
    <TextBlock HorizontalAlignment="Center" VerticalAlignment="Center" FontSize="15" FontWeight="Bold" Grid.Row="1" Grid.Column="0">Travel</TextBlock>
    <TextBlock HorizontalAlignment="Center" VerticalAlignment="Center" FontSize="15" FontWeight="Bold" Grid.Row="1" Grid.Column="1">Office Supplies</TextBlock>
    <TextBlock HorizontalAlignment="Center" VerticalAlignment="Center" FontSize="15" FontWeight="Bold" Grid.Row="1" Grid.Column="2">Salary</TextBlock>
    <TextBlock HorizontalAlignment="Center" VerticalAlignment="Center" Grid.Row="2" Grid.Column="0">20000</TextBlock>
    <TextBlock HorizontalAlignment="Center" VerticalAlignment="Center" Grid.Row="2" Grid.Column="1">10000</TextBlock>
    <TextBlock HorizontalAlignment="Center" VerticalAlignment="Center" Grid.Row="2" Grid.Column="2">50000</TextBlock>
    <TextBlock FontSize="16" FontWeight="Bold" Grid.ColumnSpan="3" Grid.Row="3">Total Expense: 80000</TextBlock>

public Page()

private void CreateGrid()
    // Create the Grid
    Grid myGrid = new Grid();
    myGrid.Width = 350;
    myGrid.Height = 200;
    myGrid.HorizontalAlignment = HorizontalAlignment.Left;
    myGrid.VerticalAlignment = VerticalAlignment.Top;
    myGrid.ShowGridLines = true;
    SolidColorBrush myBrush = new SolidColorBrush(Colors.White);
    myGrid.Background = myBrush;

    // Define the Columns
    ColumnDefinition colDef1 = new ColumnDefinition();
    ColumnDefinition colDef2 = new ColumnDefinition();
    ColumnDefinition colDef3 = new ColumnDefinition();

    // Define the Rows
    RowDefinition rowDef1 = new RowDefinition();
    RowDefinition rowDef2 = new RowDefinition();
    RowDefinition rowDef3 = new RowDefinition();
    RowDefinition rowDef4 = new RowDefinition();

    // Add the first text cell to the Grid
    TextBlock txt1 = new TextBlock();
    txt1.Text = "Expenses for 2007";
    txt1.FontSize = 20;
    txt1.FontWeight = FontWeights.Bold;
    Grid.SetColumnSpan(txt1, 3);
    Grid.SetRow(txt1, 0);
    txt1.HorizontalAlignment = HorizontalAlignment.Center;
    txt1.VerticalAlignment = VerticalAlignment.Center;

    // Add the second text cell to the Grid
    TextBlock txt2 = new TextBlock();
    txt2.Text = "Travel";
    txt2.FontSize = 15;
    txt2.FontWeight = FontWeights.Bold;
    Grid.SetRow(txt2, 1);
    Grid.SetColumn(txt2, 0);
    txt2.HorizontalAlignment = HorizontalAlignment.Center;
    txt2.VerticalAlignment = VerticalAlignment.Center;

    // Add the third text cell to the Grid
    TextBlock txt3 = new TextBlock();
    txt3.Text = "Office Supplies";
    txt3.FontSize = 15;
    txt3.FontWeight = FontWeights.Bold;
    Grid.SetRow(txt3, 1);
    Grid.SetColumn(txt3, 1);
    txt3.HorizontalAlignment = HorizontalAlignment.Center;
    txt3.VerticalAlignment = VerticalAlignment.Center;

    // Add the fourth text cell to the Grid
    TextBlock txt4 = new TextBlock();
    txt4.Text = "Salary";
    txt4.FontSize = 15;
    txt4.FontWeight = FontWeights.Bold;
    Grid.SetRow(txt4, 1);
    Grid.SetColumn(txt4, 2);
    txt4.HorizontalAlignment = HorizontalAlignment.Center;
    txt4.VerticalAlignment = VerticalAlignment.Center;

    // Add the sixth text cell to the Grid
    TextBlock txt5 = new TextBlock();
    Double db1 = new Double();
    db1 = 20000;
    txt5.Text = db1.ToString();
    Grid.SetRow(txt5, 2);
    Grid.SetColumn(txt5, 0);
    txt5.HorizontalAlignment = HorizontalAlignment.Center;
    txt5.VerticalAlignment = VerticalAlignment.Center;

    // Add the seventh text cell to the Grid
    TextBlock txt6 = new TextBlock();
    Double db2 = new Double();
    db2 = 10000;
    txt6.Text = db2.ToString();
    Grid.SetRow(txt6, 2);
    Grid.SetColumn(txt6, 1);
    txt6.HorizontalAlignment = HorizontalAlignment.Center;
    txt6.VerticalAlignment = VerticalAlignment.Center;

    // Add the final text cell to the Grid
    TextBlock txt7 = new TextBlock();
    Double db3 = new Double();
    db3 = 50000;
    txt7.Text = db3.ToString();
    Grid.SetRow(txt7, 2);
    Grid.SetColumn(txt7, 2);
    txt7.HorizontalAlignment = HorizontalAlignment.Center;
    txt7.VerticalAlignment = VerticalAlignment.Center;

    // Total all Data and Span Three Columns
    TextBlock txt8 = new TextBlock();
    txt8.FontSize = 16;
    txt8.FontWeight = FontWeights.Bold;
    txt8.Text = "Total Units: " + (db1 + db2 + db3).ToString();
    Grid.SetRow(txt8, 3);
    Grid.SetColumnSpan(txt8, 3);

    // Add the TextBlock elements to the Grid Children collection



Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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