如何以编程方式禁用WPF DataGrid中的特定单元 [英] how to programatically disable a particular cell in WPF DataGrid
问题描述
您可以告诉,如何以编程方式禁用WPF DataGrid中的特定单元格。
我回答了这个问题当我遇到同样的问题时,这是我提出的解决方案。
您无法直接在WPF中访问单元格和行,因此我们首先定义了一些辅助扩展。
使用以下代码: http:// techiethings.blogspot.com/2010/05/get-wpf-datagrid-row-and-cell.html )
public static class DataGridExtensions
{
public static T GetVisualChild< T>(Visual parent)其中T:Visual
{
T child = default(T);
int numVisuals = VisualTreeHelper.GetChildrenCount(parent);
for(int i = 0; i< numVisuals; i ++)
{
Visual v =(Visual)VisualTreeHelper.GetChild(parent,i);
child = v as T;
if(child == null)
{
child = GetVisualChild< T>(v);
}
if(child!= null)
{
break;
}
}
return child; (DataGrid grid,int index)
公共静态DataGridRow GetRow(此DataGrid网格,int索引)
{
DataGridRow row =(DataGridRow)grid.ItemContainerGenerator.ContainerFromIndex(index);
if(row == null)
{
//可以被虚拟化,显示并重试。
grid.UpdateLayout();
grid.ScrollIntoView(grid.Items [index]);
row =(DataGridRow)grid.ItemContainerGenerator.ContainerFromIndex(index);
}
返回行;
public static DataGridCell GetCell(DataGrid grid,DataGridRow row,int column)
{
if(row!= null)
{
DataGridCellsPresenter演示者= GetVisualChild< DataGridCellsPresenter>(row);
if(presenter == null)
{
grid.ScrollIntoView(row,grid.Columns [column]);
presenter = GetVisualChild< DataGridCellsPresenter>(row);
}
DataGridCell cell =(DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(column);
返回单元格;
}
返回null;
$ b $ public static DataGridCell GetCell(DataGrid grid,int row,int column)
{
DataGridRow gridRow = GetRow(grid,row);
返回GetCell(grid,gridRow,column);
$ b 通过这个我们可以得到第一行的单元格,第五列是这样的:
dataGrid1.GetCell(0,4)
因此,将列设置为禁用现在很容易:
dataGrid1.GetCell(0,4).IsEnabled = false;
请注意在某些情况下,表单需要先载入任何这些作品。
希望这有助于某个人; - )
I m having a WPF DataGrid.
Can u please tell , how to programatically disable a particular cell in WPF DataGrid.
解决方案 I'm answering this as I ran into the same issue, this is the solution I came up with.
You can't access cells and rows directly in WPF so we first define some helper extensions.
(Using some of the code from: http://techiethings.blogspot.com/2010/05/get-wpf-datagrid-row-and-cell.html)
public static class DataGridExtensions
{
public static T GetVisualChild<T>(Visual parent) where T : Visual
{
T child = default(T);
int numVisuals = VisualTreeHelper.GetChildrenCount(parent);
for (int i = 0; i < numVisuals; i++)
{
Visual v = (Visual)VisualTreeHelper.GetChild(parent, i);
child = v as T;
if (child == null)
{
child = GetVisualChild<T>(v);
}
if (child != null)
{
break;
}
}
return child;
}
public static DataGridRow GetRow(this DataGrid grid, int index)
{
DataGridRow row = (DataGridRow)grid.ItemContainerGenerator.ContainerFromIndex(index);
if (row == null)
{
// May be virtualized, bring into view and try again.
grid.UpdateLayout();
grid.ScrollIntoView(grid.Items[index]);
row = (DataGridRow)grid.ItemContainerGenerator.ContainerFromIndex(index);
}
return row;
}
public static DataGridCell GetCell(this DataGrid grid, DataGridRow row, int column)
{
if (row != null)
{
DataGridCellsPresenter presenter = GetVisualChild<DataGridCellsPresenter>(row);
if (presenter == null)
{
grid.ScrollIntoView(row, grid.Columns[column]);
presenter = GetVisualChild<DataGridCellsPresenter>(row);
}
DataGridCell cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(column);
return cell;
}
return null;
}
public static DataGridCell GetCell(this DataGrid grid, int row, int column)
{
DataGridRow gridRow = GetRow(grid, row);
return GetCell(grid, gridRow, column);
}
}
With this we can get the cell at the first row, fifth column like this:
dataGrid1.GetCell(0, 4)
So to set the column to disabled is now really easy:
dataGrid1.GetCell(0, 4).IsEnabled = false;
Please note In some cases it is necessary for the form to load before any of this works.
Hope this helps someone someday ;-)
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