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update group checkbox when Data item checkbox are selected

3 Answers 67 Views

Grid

This is a migrated thread and some comments may be shown as answers.

Andrew asked on 21 Dec 2015, 04:39 PM

I have a grid with a that I dynamically created a checkbox on the Group Header. I am trying to toggle the checkboxes in the data item to check or uncheck the group checkbox. The code below is selecting the Header checkbox and not the group checkbox. How can I acheive this?

protected void ToggleRowSelection(object sender, EventArgs e)
{
((sender as CheckBox).NamingContainer as GridItem).Selected = (sender as CheckBox).Checked;
bool checkHeader = true;
foreach (GridDataItem dataItem in rgvFunctions.MasterTableView.Items)
{
if (!(dataItem.FindControl("isFunction") as CheckBox).Checked)
{
checkHeader = false;
break;
}
}

GridHeaderItem headerItem = rgvFunctions.MasterTableView.GetItems(GridItemType.Header)[0] as GridHeaderItem;
(headerItem.FindControl("CheckAll") as CheckBox).Checked = checkHeader;

}

3 Answers, 1 is accepted

answered on 24 Dec 2015, 12:21 PM

I found the solution. I first find the GroupHeader and iterate through the child

protected void ToggleRowSelection(object sender, EventArgs e)
{
((sender as CheckBox).NamingContainer as GridItem).Selected = (sender as CheckBox).Checked;
bool checkHeader = true;
foreach (GridGroupHeaderItem headerItem in rgvFunctions.MasterTableView.GetItems(GridItemType.GroupHeader))
{
checkHeader = true;
GridItem[] children = headerItem.GetChildItems();
foreach (GridItem child in children)
{
if (!(child.FindControl("isFunction") as CheckBox).Checked)
{
checkHeader = false;
break;
}
}

var checkbox = headerItem.FindControl("CheckAll") as CheckBox;
checkbox.Checked = checkHeader;
}
}