RadCombobox Check All on Initial Load

[Ricky]

Hi,

I want check all my checkbox on RadCombobox when initial load.
Is there any feature to do that ?

Thanks,
Ricky

[Princy]

Hi Ricky,

Try the following code to check all checkboxes in a RadComboBox in pageload.

C#:

protected void Page_Load(object sender, EventArgs e)
    {
  foreach (RadComboBoxItem itm in RadComboBox1.Items)
      {
      itm.Checked = true;
      }
    }

Thanks,
Princy.

[Ricky]

Thanks for the quick response..i just thinking if there is another way around other than Princy gave.

Thanks a lot !!

[AR]

Hi,

I have tried two ways of doing it :

ddlLanguage.ItemDataBound += MultiSelectDropDownItemBound;

private void MultiSelectDropDownItemBound(object sender, RadComboBoxItemEventArgs e)
{
    e.Item.Checked = true;
}

private void SelectAllItemsInDropDown(RadComboBox rcbDropDown)
{
    foreach (RadComboBoxItem rcbItem in rcbDropDown.Items)
        rcbItem.Checked = true;
}

In both ways when the page loads we will see all items checked in the dropdown. It also intelligently checks "All Items Checked" checkbox.

But am facing a problem on trying to unselect all by clicking "Check All". We have to click twice to get this working.

Is there any fix/workaround or a new property that we can set in the control itself like "AllItemsChecked = true" from server itself?

[Helen]

Hello Ashik,

Regarding the "Check All" issue that you have to check it twice - I believe the problem is fixed in the latest version - 2012.3.1205.
Otherwise we haven't such a property about the "AllItemsChecked".

Regards,
Helen
the Telerik team

[Deekshith]

Hi,Bellow code contains RadComboBox with checkbox option,I need help to select all checkboxes when header check box is checked and uncheck header if child checkboxes are unchecked and Iam using Rad controlls for Ajax Q3 2010 version and it not supports checkbox property to select all at all. Please Suggest me some javascript to check all/Uncheack all checkboxes when header is checked.Thank You in advance.
<telerik:RadComboBox ID="RadComboBox1" Runat="server" OnClientDropDownClosed="onDropDownClosing" HighlightTemplatedItems="true"
                        AllowCustomText="true">
                        
                        <ItemTemplate>
                        <div onclick="StopPropagation(event)">
                            <asp:CheckBox runat="server" ID="chk1"/>
                                <asp:Label runat="server" ID="Label1" AssociatedControlID="chk1" Text='<%#DataBinder.Eval(Container.DataItem,"Names")%>'/>
                        </div>
                        </ItemTemplate>
                        
                        <HeaderTemplate>
                            <asp:CheckBox ID="chkHeader" runat="server" Text="All"/>
  
                        </HeaderTemplate>
                    </telerik:RadComboBox>

[Princy]

Hi Deekshith,

Please try the following JavaScript code snippet which works as expected for me.

ASPX:

...
<HeaderTemplate>
    <asp:CheckBox ID="chkHeader" runat="server" Text="All" onclick="Checked(this);" />
</HeaderTemplate>
...

JavaScript:

<script type="text/javascript">
    function Checked(checkbox) {
        var combobox = $find("<%=RadComboBox1.ClientID %>");
        if (checkbox.checked == true) {
            for (var i = 0; i < combobox.get_items().get_count(); i++) {
                $telerik.findElement(combobox.get_items()._array[i].get_element(), "chk1").checked = true;
            }
        }
        else if (checkbox.checked == false) {
            for (var i = 0; i < combobox.get_items().get_count(); i++) {
                $telerik.findElement(combobox.get_items()._array[i].get_element(), "chk1").checked = false;
            }
        }
    }
</script>

Thanks,
Princy.

[Deekshith]

Thanks for your quick reply Princy.But I'am getting the following error:JavaScript runtime error: Unable to set property 'checked' of undefined or null reference

[Deekshith]

Thank You Soo Much Princy..its working fine now.Actually i did some thing wrong in my code so i got that error.now its resolved. 

[Deekshith]

Princy do you know how to uncheck the header when any one checkbox in item template unchecked??

[Princy]

Hi Deekshith,

Please try the following code snippet which works fine at my end.

ASPX:

...
<ItemTemplate>
    <div>
        <asp:CheckBox runat="server" ID="chk1" onclick="UncheckHeader(this);" />
        ...
    </div>
</ItemTemplate>
...

JavaScript:

function UncheckHeader(checkbox) {
    var combobox = $find("<%=RadComboBox1.ClientID %>");
    if (checkbox.checked == false) {
        var checkbox = document.getElementById('<%=(RadComboBox1.Header.FindControl("chkHeader") as CheckBox).ClientID %>');
        checkbox.checked = false;
    }
}

Thanks,
Princy.

[Deekshith]

Thank You Princy :)

[Lucky]

I have telerik radcombobox and i have properties like CheckBoxes="true" ,EnableCheckAllItemsCheckBox="true" and "Contains".

if i search something it is showing related to search.i checked check all option for whatever i searched. after closing radcombox if u open again it is showing that whatever we have data that all data is showing like cheked.but i want whatever i searched that data only i want to show as checked after open the radcombobox.Below i attached 2 images in 1st image i checked only 4 items .but again if i open radcombobox it is ahowing that 5 items checked