Validating Range Constraints

I am facing a dilemma with my GridView that contains a textbox in one of its fields. To ensure that the user enters only a single character "x", I have implemented a range validator:

<asp:TextBox ID="txtMP3Master" runat="server" Text='<%# Eval("MP3Master") %>' BorderStyle="None" Width="80%" MaxLength="1" onchange="JSSaveNTSChanges(this);"></asp:TextBox>  
<asp:RangeValidator ID="MP3MasterRangeValidator" runat="server" ControlToValidate="txtMP3Master" Display="Dynamic" ErrorMessage="MP3 Master can be nothing but 'x'" Text="*" MinimumValue="x" MaximumValue="x" ValidationGroup="InsertUpdateNewTitlesStatusValidation">
</asp:RangeValidator>

Although the validator displays "*" on incorrect input, the JSSaveNTSChanges() function is still triggered. Ideally, I want this function call to be blocked when the input is invalid. Interestingly, the CompareValidator functions correctly in other fields by preventing corresponding functions from executing upon invalid input. Is there a way to resolve this issue? Thank you.

javascriptasp.net

Answer №1

Consider using the CompareValidator component instead of RangeValidator.

Here is a solution that I have personally tested and verified. Give it a try!

<asp:CompareValidator ID="CustomCompareValidator" runat="server" ErrorMessage="Comparison Error"
        ValueToCompare="x"  ControlToValidate="txtMP3Master"></asp:CompareValidator>

Answer №2

Uncertainty looms around the timing of when function JSSaveNTSChanges will be executed in relation to the validator validation process. However, I propose two potential solutions:

  1. Reposition JSSaveNTSChanges within the submit button click event.
  2. Invoke this function within a custom validator while ensuring EnableClientValidation is set to true.

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