DataGrid sütun başlığı nasıl sürüklenir ve bırakılır?

Question

WPF DataGrid ile çalışıyorum. Sütun Başlığını sürüklemeliyim, başka bir kontrole bırakmalıyım (Label) ve bazı işlemleri yapmalıyım. Ama DataGrid sütun üstbilgisi sürükle ve bırak elde edemiyorum. ColumnHeaderDragStarted olayı ile denedim, ancak sütun üstbilgisi nesnesini veya işleyicideki yalnızca başlığın adını bulamıyorum. Herhangi bir yardım plz !!

Answer 1

Belki bu size yardımcı olabilir: XAML üzerinde

:

< DataGrid Adı = "DataGrid" MouseRightButtonUp = "DataGrid_MouseRightButtonUp"/> C# Code üzerinde

:

private void DataGrid_MouseRightButtonUp(object sender, MouseButtonEventArgs e) 
    { 
     DependencyObject dep = (DependencyObject)e.OriginalSource; 

     while ((dep != null) && !(dep is DataGridCell) && !(dep is DataGridColumnHeader)) 
     { 
      dep = VisualTreeHelper.GetParent(dep); 
     } 

     if (dep == null) 
      return; 

     if (dep is DataGridColumnHeader) 
     { 
      DataGridColumnHeader columnHeader = dep as DataGridColumnHeader; 

      // find the property that this cell's column is bound to 
      string boundPropertyName = FindBoundProperty(columnHeader.Column); 

      int columnIndex = columnHeader.Column.DisplayIndex; 

      ClickedItemDisplay.Text = string.Format(
       "Header clicked [{0}] = {1}", 
       columnIndex, boundPropertyName); 
     } 

     if (dep is DataGridCell) 
     { 
      DataGridCell cell = dep as DataGridCell; 

      // navigate further up the tree 
      while ((dep != null) && !(dep is DataGridRow)) 
      { 
       dep = VisualTreeHelper.GetParent(dep); 
      } 

      if (dep == null) 
       return; 

      DataGridRow row = dep as DataGridRow; 

      object value = ExtractBoundValue(row, cell); 

      int columnIndex = cell.Column.DisplayIndex; 
      int rowIndex = FindRowIndex(row); 

      ClickedItemDisplay.Text = string.Format(
       "Cell clicked [{0}, {1}] = {2}", 
       rowIndex, columnIndex, value.ToString()); 
     } 
    } 

    /// <summary> 
    /// Determine the index of a DataGridRow 
    /// </summary> 
    /// <param name="row"></param> 
    /// <returns></returns> 
    private int FindRowIndex(DataGridRow row) 
    { 
     DataGrid dataGrid = ItemsControl.ItemsControlFromItemContainer(row) as DataGrid; 

     int index = dataGrid.ItemContainerGenerator.IndexFromContainer(row); 

     return index; 
    } 

    /// <summary> 
    /// Find the value that is bound to a DataGridCell 
    /// </summary> 
    /// <param name="row"></param> 
    /// <param name="cell"></param> 
    /// <returns></returns> 
    private object ExtractBoundValue(DataGridRow row, DataGridCell cell) 
    { 
     // find the property that this cell's column is bound to 
     string boundPropertyName = FindBoundProperty(cell.Column); 

     // find the object that is realted to this row 
     object data = row.Item; 

     // extract the property value 
     PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(data); 
     PropertyDescriptor property = properties[boundPropertyName]; 
     object value = property.GetValue(data); 

     return value; 
    } 

    /// <summary> 
    /// Find the name of the property which is bound to the given column 
    /// </summary> 
    /// <param name="col"></param> 
    /// <returns></returns> 
    private string FindBoundProperty(DataGridColumn col) 
    { 
     DataGridBoundColumn boundColumn = col as DataGridBoundColumn; 

     // find the property that this column is bound to 
     Binding binding = boundColumn.Binding as Binding; 
     string boundPropertyName = binding.Path.Path; 

     return boundPropertyName; 
    } 
} 

// This XAML and C# where extracted from a link contained on this URL:  
// http://social.msdn.microsoft.com/Forums/en/wpf/thread/61707b8a-e6c6-474b-ac2b-3446319625bd