how to validate rad combo box of telrik control tollkit in asp.net

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i am using rad combo box control on my page and i bind this by using wizard given in it ...
i trying to validate this using required field validator , but it not working ...
i tried also by setting initieal value =0 or text value of this index

but nothing is working ...
any suggestion .. plss bros... ?

XML

<telerik:RadComboBox ID="CountryCombo" runat="server" CssClass="MyComboBox" DataSourceID="SqlDataSource1" DataTextField="Country_Name" DataValueField="CountryID" EmptyMessage="Select Country"></telerik:RadComboBox> <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="Data Source=FTPL01\SQL2012;Initial Catalog=ZricksDB;Persist Security Info=True;User ID=sa;Password=webuser" ProviderName="System.Data.SqlClient" SelectCommand="SELECT [CountryID], [Country_Name] FROM [Country_Master]"></asp:SqlDataSource> <asp:RequiredFieldValidator ID="RequiredFieldValidator6" runat="server" ControlToValidate="CountryCombo" InitialValue="0" ErrorMessage="*"></asp:RequiredFieldValidator>

Posted 14-Mar-14 0:36am

GDdixit

Updated 27-May-19 20:45pm

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Aravindba 14-Mar-14 6:40am

Hai what u need to validate ? if combobox item not select ?

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JennyDcruz · Answer 1 · 2019-05-27T20:45:00

Do not add InitialValue. Remove that it will work correctly.
Below i have added code you can try-

<telerik:radcombobox id="CountryCombo" runat="server" cssclass="MyComboBox" datasourceid="SqlDataSource1" datatextfield="Country_Name" datavaluefield="CountryID" emptymessage="Select Country"></telerik:radcombobox>

    <asp:sqldatasource id="SqlDataSource1" runat="server" connectionstring="Data Source=FTPL01\SQL2012;Initial Catalog=ZricksDB;Persist Security Info=True;User ID=sa;Password=webuser" providername="System.Data.SqlClient" selectcommand="SELECT [CountryID], [Country_Name] FROM [Country_Master]"></asp:sqldatasource>

    <asp:requiredfieldvalidator id="RequiredFieldValidator6" runat="server" controltovalidate="CountryCombo" errormessage="*"></asp:requiredfieldvalidator>