How to find child gridview in user defined function - asp.net

Question

This is my code to save the selected check box values while paging, but as I am working with nested gridview I am unable to find the control of the required child gridview
private void SaveCheckedValues()
{
ArrayList userdetails = new ArrayList();
int index = -1;
GridView gv = (GridView)gvCustomers.FindControl("gvOrders"); // Is this correct or any other way of finding the child control
foreach (GridViewRow gvrow in gv.Rows)
{
index = (int)gv.DataKeys[gvrow.RowIndex].Value;
bool result = ((CheckBox)gvrow.FindControl("chkBoxChild")).Checked;
// Check in the Session
if (Session["CHECKED_ITEMS"] != null)
userdetails = (ArrayList)Session["CHECKED_ITEMS"];
if (result)
{
if (!userdetails.Contains(index))
userdetails.Add(index);
}
else
userdetails.Remove(index);
}
if (userdetails != null && userdetails.Count > 0)
Session["CHECKED_ITEMS"] = userdetails;
}

Answer 1

I have a generic recursive find control code that often helps in these circumstances. The issue with grid controls is that there is a certain level of nesting of controls int hem for the row and cell, and contents in the cell.
Private Function FindControlRecursive(ByVal root As Control, ByVal id As String) As Control
If root.ClientID Is Nothing AndAlso root.ClientID.EndsWith(id) Then
Return root
End If
For Each c As Control In root.Controls
Dim t As Control = FindControlRecursive(c, id)
If Not t Is Nothing Then
Return t
End If
Next c
Return Nothing
End Function
The code is in VB.net but you get the gist

Answer 2

private void SaveCheckedValues()
{
ArrayList userdetails = new ArrayList();
int index = -1;
foreach (GridViewRow gvRow1 in gvCustomers.Rows)
{
GridView gv = (GridView)gvRow1.FindControl("gvOrders");
foreach (GridViewRow gvrow in gv.Rows)
{
index = (int)gv.DataKeys[gvrow.RowIndex].Value;
bool result = ((CheckBox)gvrow.FindControl("chkBoxChild")).Checked;
// Check in the Session
if (Session["CHECKED_ITEMS"] != null)
userdetails = (ArrayList)Session["CHECKED_ITEMS"];
if (result)
{
if (!userdetails.Contains(index))
userdetails.Add(index);
}
else
userdetails.Remove(index);
}
}
if (userdetails != null && userdetails.Count > 0)
Session["CHECKED_ITEMS"] = userdetails;
}

Answer 3

try this:
private void SaveCheckedValues()
{
foreach(GridViewRow rIndex in GridView1.Rows)
{
GridView gv = new GridView();
gv = (GridView)row.FindControl("GridView2");
//user gv
}
}