Question

I have a grid with a few items which have a checkbox at the start of each row. I also have a select all checkbox at the top of the grid. The scenario is something like our gmail or yahoo inbox. My question is, suppose i disable a checkbox and then click on select all checkbox, the disabled checkbox should not be checked. Is there any solution for this? I have attached relevant pieces of code as follows.

*aspx file

<telerik:GridTemplateColumn UniqueName="CheckBoxTemplateColumn">

     <HeaderTemplate>

         <asp:CheckBox id="headerChkbox" OnCheckedChanged="ToggleSelectedState" AutoPostBack="True" runat="server"></asp:CheckBox>

     </HeaderTemplate>

     <ItemTemplate>

         <asp:CheckBox id="CheckBox1" OnCheckedChanged="ToggleRowSelection" AutoPostBack="True"  runat="server"></asp:CheckBox>

     </ItemTemplate>

</telerik:GridTemplateColumn>

*code behind

 protected void ToggleRowSelection(object sender, EventArgs e) //selecting a particular row

    {
        ((sender as CheckBox).NamingContainer as GridItem).Selected = (sender as CheckBox).Checked;

    }

    protected void ToggleSelectedState(object sender, EventArgs e) //select all rows

    {

        CheckBox headerCheckBox = (sender as CheckBox);

        foreach (GridDataItem dataItem in grdCurrent.MasterTableView.Items)

        {

            (dataItem.FindControl("CheckBox1") as CheckBox).Checked = headerCheckBox.Checked;

            dataItem.Selected = headerCheckBox.Checked;

        }

    }

Answer 1

You need to check if it is Enabled before setting it to Checked.

CheckBox headerCheckBox = (sender as CheckBox);

foreach (GridDataItem dataItem in grdCurrent.MasterTableView.Items)
{
  if((dataItem.FindControl("CheckBox1") as CheckBox).Enabled) // add this condtion
  {
    (dataItem.FindControl("CheckBox1") as CheckBox).Checked = headerCheckBox.Checked;
    dataItem.Selected = headerCheckBox.Checked;
  }
}