Validation in RadCombo

[Parodist]

How can we add ----select---- option  as the first index and  put the validation controls for the remaining indexes in RadCombo ?


Thanking you in advance

[Shinu]

Hi Parodist,

I hope you want to use RequireFieldValidator for validating the RadComboBox. In that case you can set the InitialValue of the RequireFieldValidator to -Select- for excluding the item from validation.

ASPX:

<telerik:RadComboBox ID="RadComboBox1" Runat="server">
    <Items>
        <telerik:RadComboBoxItem runat="server" Text="-Select-" Value="-Select-"/>
        <telerik:RadComboBoxItem runat="server" Text="RadComboBoxItem1"
            Value="RadComboBoxItem1" />
        <telerik:RadComboBoxItem runat="server" Text="RadComboBoxItem2"
            Value="RadComboBoxItem2" />
    </Items>
</telerik:RadComboBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="RadComboBox1" ErrorMessage="Value cannot be empty" InitialValue="-Select-"></asp:RequiredFieldValidator>

Thanks,
Shinu.

[Parodist]

Thanks for the reply Shinu,I display the RadComboBox item from the database on page load

How can I have the --select-- option with required field validators ?

  if (!IsPostBack)
        {
            string Query = "";
            DataTable dt = null;
            Query = "SELECT ActivityId,ActivityType FROM ScheduleActivityMaster";
            dt = objDataLayer.GetDataTable(Query);
            RadComboBox1.DataSource = dt;
            RadComboBox1.DataTextField = "ActivityType";
            RadComboBox1.DataValueField = "ActivityId";
            RadComboBox1.DataBind();


        }

 

[Parodist]

Hi Shinu ,

I got it working by adding 

RadComboBox1.Items.Insert(0,

new RadComboBoxItem("----Select----", "0")); but how would I add required field validator ?

Thanking you.

 

[Shinu]

Hello Parodist,

I guess you are trying to add the RequiredFieldValidator control dynamically. You can try the below code snippet for adding the control dynamically.

CS:

protected void Page_Load(object sender, EventArgs e)
{
    RequiredFieldValidator RequiredFieldValidator1 = new RequiredFieldValidator();
    RequiredFieldValidator1.ControlToValidate = "RadComboBox1";
    RequiredFieldValidator1.ErrorMessage = "Value cannot be empty";
    RequiredFieldValidator1.InitialValue = "-Select-";
    this.form1.Controls.Add(RequiredFieldValidator1);
}

Thanks,
Shinu.