Disable check box if already checked

[Najid Hanif]

Hi, on my grid in edit mode, i would like to disable a check box if it is already checked so it can not be changed. How can I do this?

Thanks

[Princy]

Hello Najid,

Take a look at my following thread where it discusses the similar scenario.
how to enable control on edit mode if check box is checked .

Thanks,
Princy.

[Najid Hanif]

Hi I need a little more help on this. If I understand that code correctly, it will update a text box after a checkbox has been checked. Not exactly what I need to do. I need to disable the checkbox after it has been checked (only after the form has been saved/updated). My checkbox column is like this: Does it need to be a template column? Using the editor I tried to convert this column to a template column but that button is grayed out for this column.

<telerik:GridCheckBoxColumn DataField="MovedToBS" DataType="System.Boolean"
                            FilterControlAltText="Filter MovedToBS column" HeaderText="MovedToBS"
                            SortExpression="MovedToBS" UniqueName="MovedToBS">


    <FilterTemplate>
          <telerik:RadComboBox ID="MovedToBSFilter" runat="server" OnClientSelectedIndexChanged="MovedToBSFilterSelectedIndexChanged"
              SelectedValue='<%# ((GridItem)Container).OwnerTableView.GetColumn("MovedToBS").CurrentFilterValue %>'
              Width="70px" DataSourceID="MovedToBSList" AppendDataBoundItems="true" OnItemDataBound="MovedToBSFilter_ItemDataBound">
              <Items>
                  <telerik:RadComboBoxItem Text="All"/>
              </Items>
          </telerik:RadComboBox>
          <telerik:RadScriptBlock ID="RadScriptBlock3" runat="server">

              <script type="text/javascript">
                  function MovedToBSFilterSelectedIndexChanged(sender, args) {
                      var tableView = $find("<%# ((GridItem)Container).OwnerTableView.ClientID %>");
                      var filterVal = args.get_item().get_value();
                      if (filterVal == "") {
                          tableView.filter("MovedToBS", filterVal, "NoFilter");
                      }
                      else if (filterVal == "1") {
                          tableView.filter("MovedToBS", "1", "EqualTo");
                      }
                      else if (filterVal == "0") {
                          tableView.filter("MovedToBS", "0", "EqualTo");
                      }
                  }
              </script>

          </telerik:RadScriptBlock>
      </FilterTemplate>



</telerik:GridCheckBoxColumn>

[Maria Ilieva]

Hi Najid,

In this case it will be better if you are using TemplateColumn with checkbox in it. For example:
ASPX:

<telerik:RadGrid ID="RadGrid1" runat="server" DataSourceID="SqlDataSource1" OnItemCreated="RadGrid1_ItemCreated">
           <MasterTableView DataSourceID="SqlDataSource1" AutoGenerateColumns="False">
               <Columns>
                   <telerik:GridTemplateColumn UniqueName="TempCheckBox">
                       <ItemTemplate>
                           <asp:CheckBox ID="CheckBox1" runat="server" />
                       </ItemTemplate>
                   </telerik:GridTemplateColumn>
                   . . .
                                 </Columns>
           </MasterTableView>
       </telerik:RadGrid>

CS:

protected void RadGrid1_ItemCreated(object sender, GridItemEventArgs e)
    {
        if (e.Item is GridDataItem)
        {
            GridDataItem item = (GridDataItem)e.Item;
            CheckBox chk = (CheckBox)item.FindControl("CheckBox1");
            chk.Attributes.Add("onclick", "test(" + chk.ClientID + ")");

        }
    }

JS:

<script type="text/javascript">

function test(cntrl)

{

    if(cntrl.checked)
    {
    cntrl.disable();
    }

    else
    {
        cntrl.enable();
    }
}

    </script>

Give this a try and let me know if it helps.

Greetings,
Maria Ilieva
the Telerik team