如何使用C＃在GridView中为RangeValidator动态添加MaximumValue？

Question

I have this RangeValidator

    <asp:RangeValidator ID="MarksValidation" runat="server" ErrorMessage="Invalid marks" ValidationGroup="Validation" Type="Integer" ControlToValidate="subject_marks" MinimumValue="-1" MaximumValue='' ></asp:RangeValidator>
<asp:TextBox ID="subject_marks" ControlStyle-CssClass="wide" runat="server" Text='<%# Eval("subject") %>' />

Now i want calculate max marks in c# in then assign that to MaximumValue of the RangeValidator. How can I do this?

Answer 1

You can set the MaximumValue property in code behind with the expression you want.

MarksValidation.MaximumValue = expression;

Example:

MarksValidation.MaximumValue = 50*SomeValue;

Edit, based on comments, as validator is in GridView

protected void gvUserInfo_RowDataBound(object sender, GridViewRowEventArgs e)
{
   if (e.Row.RowType == DataControlRowType.DataRow)
   {
       RangeValidator rv = (RangeValidator)e.Row.FindControl("MarksValidation");
       rv.MaximumValue = 50*Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, "ColumnFromDatabase"));;

   }
}