We have Range Attribute where we can specify the minimum and maximum value for a column

is their a attribute or method by which i can specify a list of  valid values like (15,30,45,60)

Hi There,

You can use reqularexpressionvalidator to validate the requirement. and maybe require field validator to ensure text is not empty

<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>

<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="This is required!" ControlToValidate="TextBox1"></asp:RequiredFieldValidator>

<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ErrorMessage="Only accept value 15, 30, 45, 60." ControlToValidate="TextBox1" ValidationExpression="(15|30|45|60)"></asp:RegularExpressionValidator>

Hope it helps!

 Thanks for the Lead

[RegularExpression("(0|15|30|45)", ErrorMessage = "Mintues Must be 0 - 15 - 30 - 45")]