我的代码如下:
void mainDataContextObj_CutSelectedColumnEvent(string columnId)
{
IList<DataGridColumn> columns = dg.Columns;
for(int i=2; i<dg.Columns.Count; i++)
{
DataGridColumnHeader headerObj = dg.Columns[i].Header as DataGridColumnHeader;
//This always returns headerObj as null!!!
}
}
我需要从列中获取
DataGridColumnHeader
。我要去哪里错了? 最佳答案
无论您将其设置为什么,DataGridColumn的Header对象实际上是该列的可见标题。 DataGridColumn不是可视树的一部分,因此没有直接访问它的DataGridColumnHeader的方法(我们甚至不能确定它是否存在)。但是您可以执行以下操作尝试并访问它
DataGridColumnHeader headerObj = GetColumnHeaderFromColumn(column);
private DataGridColumnHeader GetColumnHeaderFromColumn(DataGridColumn column)
{
// dataGrid is the name of your DataGrid. In this case Name="dataGrid"
List<DataGridColumnHeader> columnHeaders = GetVisualChildCollection<DataGridColumnHeader>(dataGrid);
foreach (DataGridColumnHeader columnHeader in columnHeaders)
{
if (columnHeader.Column == column)
{
return columnHeader;
}
}
return null;
}
public List<T> GetVisualChildCollection<T>(object parent) where T : Visual
{
List<T> visualCollection = new List<T>();
GetVisualChildCollection(parent as DependencyObject, visualCollection);
return visualCollection;
}
private void GetVisualChildCollection<T>(DependencyObject parent, List<T> visualCollection) where T : Visual
{
int count = VisualTreeHelper.GetChildrenCount(parent);
for (int i = 0; i < count; i++)
{
DependencyObject child = VisualTreeHelper.GetChild(parent, i);
if (child is T)
{
visualCollection.Add(child as T);
}
else if (child != null)
{
GetVisualChildCollection(child, visualCollection);
}
}
}
关于wpf - 如何从DataGridColumn获取DataGridColumnHeader?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/4030764/