How to set default vale for multi select radcombobox

[Maddela]

Hi

I am using the following code for multi select drop down list. I want to set default value when page gets loads.

<telerik:RadComboBox runat="server" ID="RadComboBoxProvider" AllowCustomText="true"
                            Text="Select" >
                            <ItemTemplate>
                                <asp:CheckBox runat="server" ID="cbProvider" AutoPostBack="true" Text='<%#Eval("First_Name")%>' />
                            </ItemTemplate>
                        </telerik:RadComboBox>

[Princy]

Hello,

You can set EmptyMessage property of RadComboBox.

Thanks,
Princy.

[Maddela]

I not able to follow you properly, do you have any sample code. If you don't mind

[Princy]

Hello,

You can try the following sample code.
ASPX:

<telerik:RadComboBox ID="RadComboBox1" runat="server" DataSourceID="SqlDataSource1" DataTextField="FirstName" DataValueField="FirstName" EmptyMessage="Select" Width="300px" AutoPostBack="true">
</telerik:RadComboBox>

Thanks,
Princy.

[Maddela]

       No not like that, i am using multi select drop down list, and filling that from data base values, if i give radcombobox.selectedvalue=2 the value should be checked in that combobox. please look into my attached scree shot for clear understand.

[Kalina]

Hello Maddela,

Can you paste here the full RadComboBox markup that you use?

Regards,
Kalina
the Telerik team

[Maddela]

<telerik:RadComboBox runat="server" ID="RadComboBoxProvider" AllowCustomText="true"
                            Text="Select" >
                            <ItemTemplate>
                                <asp:CheckBox runat="server" ID="cbProvider" AutoPostBack="true" Text='<%#Eval("First_Name")%>' />
                            </ItemTemplate>
                        </telerik:RadComboBox>

[Kalina]

Hi Maddela,

Let me suggest you use the RadComboBox CheckBoxes feature.
Please take a look at the “ComboBox / CheckBoxes“ online demo and the “CheckBox Support” help article.

If you want to display the texts of the RadComboBox items that have been already checked – you can easily make this by handling the OnItemDataBound event:

<telerik:RadComboBox ID="RadComboBox1" runat="server"
    OnItemDataBound="OnItemDataBound" AutoPostBack="true"
    OnItemChecked="OnItemChecked" CheckBoxes="true">
</telerik:RadComboBox>

protected void OnItemDataBound(object sender, RadComboBoxItemEventArgs e)
{
    RadComboBox combo = (RadComboBox)sender;
    DataRowView dr = (DataRowView)e.Item.DataItem;

    if (Boolean.Parse(dr["Checked"].ToString()))
    {
        e.Item.Checked = true;
    }

}

Then you can update the database within the OnItemChecked event handler.
I am attaching here a basic example - it is quite simple but I believe that it will help you get started your implementation.

Greetings,
Kalina
the Telerik team