我使用代码通过使用wpf c#。中的复选框从数据网格中删除多行。
private void DeleteSelected_Click(object sender, RoutedEventArgs e)
{
for (int j = 0; j < dgemployee.Items.Count; j++)
{
DataGridRow item = (DataGridRow)dgemployee.ItemContainerGenerator.ContainerFromItem(dgemployee.Items[j]);
CheckBox ckb = (CheckBox)GetVisualChild<CheckBox>(item);
if (ckb.IsChecked.Value)
{
string id = (dgemployee.SelectedCells[1].Column.GetCellContent(item) as TextBlock).Text;
OleDbConnection con = new OleDbConnection();
con.ConnectionString = "Provider=Microsoft.Jet.Oledb.4.0; Data Source=" + AppDomain.CurrentDomain.BaseDirectory + "\\Database2.mdb";
OleDbCommand cmd = new OleDbCommand("Delete from employee_registration where ID = " + id + "", con);
con.Open();
cmd.ExecuteNonQuery();
BindGrid();
}
}
}
以上代码适用于wpf c#中的删除按钮。
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;
}
以上代码在删除行中的多行时会出错
//int numVisuals = VisualTreeHelper.GetChildrenCount(parent);
“值不能为空。\ r \ nParameter name:element”
答案 0 :(得分:0)
尝试使用i < numVisuals
代替i <= numVisuals
,希望这会有所帮助。