I am working with WPF DataGrid. I have to drag the Column Header, drop it to some other control(say Label) and do some operation. But i am not able to achieve drag and drop of DataGrid Column Header. I have tried with ColumnHeaderDragStarted event, but I am not able to find Column Header object or just the Name of header in the handler. Any help plz!!
Maybe this can help you:
On XAML:
<DataGrid Name="DataGrid" MouseRightButtonUp="DataGrid_MouseRightButtonUp" />
On C# Code:
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
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