wpf 获取datagrid 模板列中的控件

目前采用的 方法 （网上提供的一款）

public static DataGridRow GetRow(DataGrid datagrid, int columnIndex)
{
DataGridRow row = (DataGridRow)datagrid.ItemContainerGenerator.ContainerFromIndex(columnIndex);
if (row == null)
{
datagrid.UpdateLayout();
datagrid.ScrollIntoView(datagrid.Items[columnIndex]);
row = (DataGridRow)datagrid.ItemContainerGenerator.ContainerFromIndex(columnIndex); //确保这一行出现
}
return row;
}
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 DataGridCell GetCell(DataGrid datagrid, int rowIndex, int columnIndex)
{
DataGridCell cell=new DataGridCell ();
try
{
DataGridRow rowContainer = GetRow(datagrid, rowIndex);

if (rowContainer != null)
{
DataGridCellsPresenter presenter = GetVisualChild<DataGridCellsPresenter>(rowContainer);

//cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(columnIndex);
cell = CommonHelper.GetCell(datagrid, rowIndex, 8);
if (cell == null)
{
datagrid.ScrollIntoView(rowContainer, datagrid.Columns[columnIndex]);
cell = (DataGridCell)presenter.ItemContainerGenerator.ContainerFromIndex(columnIndex);
}
return cell;
}
}
catch (Exception ex)
{

}
return cell;
}

public static T FindVisualChildByName<T>(Visual parent, string name) where T : Visual
{
if (parent != null)
{
for (int i = 0; i < VisualTreeHelper.GetChildrenCount(parent); i++)
{
var child = VisualTreeHelper.GetChild(parent, i) as Visual;
string controlName = child.GetValue(Control.NameProperty) as string;
if (controlName == name)
{
return child as T;
}
else
{
T result = FindVisualChildByName<T>(child, name);
if (result != null)
return result;
}
}
}
return null;
}

自己使用的一种方法

string strReportStatus = (dgReportList.Items[i] as DataRowView)["STATUS"].ToString();
DataGridTemplateColumn templeColumn = dgReportList.Columns[8] as DataGridTemplateColumn;

FrameworkElement s = dgReportList.Columns[8].GetCellContent(dgReportList.Items[i]);
TextBlock tbOper = templeColumn.CellTemplate.FindName("blockOper", s) as TextBlock;

当循环到一定的 行时 会报出为空 FrameworkElement s = dgReportList.Columns[8].GetCellContent(dgReportList.Items[i]);

solution:

你的datagrid是默认开启了ui virtualization 的吧，如果是这样的话，VisualTree并不是所有的控件，为了显示加速，virtualization默认的只会加载一定范围的控件，不显示的控件并不加载.

正解！！！！！！！！！！！！！ 怒赞！！！！！！！！！！！！！！！！！！！

在datagrid属性里面要关闭就可以了，不过加时间是问题，如果不是分页的话

EnableColumnVirtualization="False"