DataGrid.Columns DataGrid.Columns DataGrid.Columns DataGrid.Columns Property

Definición

Obtiene una colección que contiene todas las columnas de la DataGrid.Gets a collection that contains all the columns in the DataGrid.

public:
 property System::Collections::ObjectModel::ObservableCollection<System::Windows::Controls::DataGridColumn ^> ^ Columns { System::Collections::ObjectModel::ObservableCollection<System::Windows::Controls::DataGridColumn ^> ^ get(); };
public System.Collections.ObjectModel.ObservableCollection<System.Windows.Controls.DataGridColumn> Columns { get; }
member this.Columns : System.Collections.ObjectModel.ObservableCollection<System.Windows.Controls.DataGridColumn>
Public ReadOnly Property Columns As ObservableCollection(Of DataGridColumn)

Valor de propiedad

La colección de columnas en el DataGrid.The collection of columns in the DataGrid.

Ejemplos

El ejemplo siguiente muestra cómo agregar una columna a la colección.The following example shows how to add a column to the collection.

<!-- ItemsSource is a DataTable that contains a list of customers.  The DataTable columns are  
     Title, FirstName, MiddleName, LastName, Suffix, CompanyName, EmailAddress, and Phone.-->
<DataGrid Grid.Row="2" Name="DG2" ItemsSource="{Binding}" AutoGenerateColumns="False" />
public Window1()
{
Public Sub New()
    //Create a new column to add to the DataGrid
    DataGridTextColumn textcol = new DataGridTextColumn();
    //Create a Binding object to define the path to the DataGrid.ItemsSource property
    //The column inherits its DataContext from the DataGrid, so you don't set the source
    Binding b = new Binding("LastName");
    //Set the properties on the new column
    textcol.Binding = b;
    textcol.Header = "Last Name";
    //Add the column to the DataGrid
    DG2.Columns.Add(textcol);
    
}
    'Create a new column to add to the DataGrid
    Dim textcol As New DataGridTextColumn()
    'Create a Binding object to define the path to the DataGrid.ItemsSource property 
    'The column inherits its DataContext from the DataGrid, so you don't set the source
    Dim b As New Binding("LastName")
    'Set the properties on the new column
    textcol.Binding = b
    textcol.Header = "Last Name"
    'Add the column to the DataGrid

    DG2.Columns.Add(textcol)
End Sub

El ejemplo siguiente muestra cómo quitar una columna de la colección.The following example shows how to remove a column from the collection.

<Button Content="Delete First Column" Click="Button_Click" />
<!-- ItemsSource is a DataTable that contains a list of customers.  The DataTable columns are  
     Title, FirstName, MiddleName, LastName, Suffix, CompanyName, EmailAddress, and Phone.-->
<DataGrid Grid.Row="1" Name="DG1" ItemsSource="{Binding}" AutoGeneratingColumn="DG1_AutoGeneratingColumn"  />
private void Button_Click(object sender, RoutedEventArgs e)
{
    //Delete the first column whether visible or not
    DG1.Columns.RemoveAt(0);

}
Private Sub Button_Click(ByVal sender As Object, ByVal e As RoutedEventArgs)
    'Delete the first column whether visible or not
    DG1.Columns.RemoveAt(0)
End Sub

El ejemplo siguiente muestra cómo establecer las propiedades en columnas de la colección cuando son generados automáticamente y se produce un evento.The following example shows how to set properties on columns in the collection when they are auto-generated and when an event occurs.

<CheckBox Content="View Customer Details" Checked="CheckBox_Checked" Unchecked="CheckBox_Unchecked" />
<!-- ItemsSource is a DataTable that contains a list of customers.  The DataTable columns are  
     Title, FirstName, MiddleName, LastName, Suffix, CompanyName, EmailAddress, and Phone.-->
<DataGrid Grid.Row="1" Name="DG1" ItemsSource="{Binding}" AutoGeneratingColumn="DG1_AutoGeneratingColumn"  />
private void DG1_AutoGeneratingColumn(object sender, DataGridAutoGeneratingColumnEventArgs e)
{
    //Set properties on the columns during auto-generation
    switch (e.Column.Header.ToString())
    {
        case "LastName":
            e.Column.CanUserSort = false;
            e.Column.Visibility = Visibility.Visible;
            break;
        case "FirstName":
            e.Column.Visibility = Visibility.Visible;
            break;
        case "CompanyName":
            e.Column.Visibility = Visibility.Visible;
            break;
        case "EmailAddress":
            e.Column.Visibility = Visibility.Visible;
            break;
        default:
            e.Column.Visibility = Visibility.Collapsed;
            break;
    }

}

private void CheckBox_Checked(object sender, RoutedEventArgs e)
{
    //Make each column in the collection visible
    foreach (DataGridColumn col in DG1.Columns)
    {
        col.Visibility = Visibility.Visible;
    }
}

private void CheckBox_Unchecked(object sender, RoutedEventArgs e)
{
    //Get the columns collection
    ObservableCollection<DataGridColumn> columns = DG1.Columns;

    //set the visibility for each column so only 4 columns are visible
    foreach (DataGridColumn col in columns)
    {
        switch (col.Header.ToString())
        {
            case "LastName":
                col.Visibility = Visibility.Visible;
                break;
            case "FirstName":
                col.Visibility = Visibility.Visible;
                break;
            case "CompanyName":
                col.Visibility = Visibility.Visible;
                break;
            case "EmailAddress":
                col.Visibility = Visibility.Visible;
                break;
            default:
                col.Visibility = Visibility.Collapsed;
                break;
        }
    }

}
Private Sub DG1_AutoGeneratingColumn(ByVal sender As Object, ByVal e As DataGridAutoGeneratingColumnEventArgs)
    'Set properties on the columns during auto-generation
    Select Case e.Column.Header.ToString()
        Case "LastName"
            e.Column.CanUserSort = False
            e.Column.Visibility = Visibility.Visible
            Exit Select
        Case "FirstName"
            e.Column.Visibility = Visibility.Visible
            Exit Select
        Case "CompanyName"
            e.Column.Visibility = Visibility.Visible
            Exit Select
        Case "EmailAddress"
            e.Column.Visibility = Visibility.Visible
            Exit Select
        Case Else
            e.Column.Visibility = Visibility.Collapsed
            Exit Select

    End Select
End Sub

Private Sub CheckBox_Checked(ByVal sender As Object, ByVal e As RoutedEventArgs)
    'Make each column in the collection visible
    For Each col As DataGridColumn In DG1.Columns
        col.Visibility = Visibility.Visible
    Next
End Sub

Private Sub CheckBox_Unchecked(ByVal sender As Object, ByVal e As RoutedEventArgs)
    'Get the columns collection
    Dim columns As ObservableCollection(Of DataGridColumn) = DG1.Columns

    'set the visibility for each column so only 4 columns are visible
    For Each col As DataGridColumn In columns
        Select Case col.Header.ToString()
            Case "LastName"
                col.Visibility = Visibility.Visible
                Exit Select
            Case "FirstName"
                col.Visibility = Visibility.Visible
                Exit Select
            Case "CompanyName"
                col.Visibility = Visibility.Visible
                Exit Select
            Case "EmailAddress"
                col.Visibility = Visibility.Visible
                Exit Select
            Case Else
                col.Visibility = Visibility.Collapsed
                Exit Select
        End Select

    Next
End Sub

Comentarios

Use el Columns colección para agregar columnas, quite las columnas o actualizar las propiedades de las columnas.Use the Columns collection to add columns, remove columns, or update properties on the columns.

Nota

El orden de columnas en la colección no determina el orden en que aparecen en la DataGrid.The order of columns in the collection does not determine the order that they will appear in the DataGrid. El DisplayIndex propiedad determina el orden de las columnas.The DisplayIndex property determines the column order.

Cada columna de la Columns colección define una columna en la DataGrid.Each column in the Columns collection defines a column in the DataGrid. La siguiente columna de tabla se indican los cuatro tipos que el DataGrid proporciona.The following table lists the four column types that the DataGrid provides.

Tipo de columnaColumn Type Presentación de datosData Display
DataGridHyperlinkColumn Utilice esta opción para mostrar los datos URI.Use to display URI data.
DataGridComboBoxColumn Utilice esta opción para mostrar los datos de enumeración.Use to display enumeration data.
DataGridTextColumn Utilice esta opción para mostrar el texto.Use to display text.
DataGridCheckBoxColumn Use esta opción para mostrar datos booleanos.Use to display Boolean data.

Además, puede definir su propia columna personalizada mediante DataGridTemplateColumn.In addition, you can define your own custom column by using DataGridTemplateColumn. Columnas de la colección deben derivar de DataGridColumn.Columns in the collection must derive from DataGridColumn. Tenga en cuenta que DataGridBoundColumn, que agrega compatibilidad para el enlace, se deriva de DataGridColumn y es la base para varios de los tipos de columna definida.Note that DataGridBoundColumn, which adds support for binding, derives from DataGridColumn and is the base for several of the defined column types.

Todas las columnas de la colección, utilice el ItemsSource propiedad definida por el DataGrid.All columns in the collection use the ItemsSource property defined by the DataGrid.

Puede modificar el Columns colección en tiempo de ejecución independientemente de si contiene columnas generadas.You can modify the Columns collection at run time regardless of whether it contains generated columns.

Se aplica a