CODEWITHSUNDEEP
c#asp.netvalidation
user3518032
user3518032

Reputation: 423

Range validator not working

i am trying to put asp.net Required Field Validator and Range Validator but only Required Field Validator works not range. why ?

<asp:TextBox ID="txtCNIC" runat="server" CssClass="textField_width"></asp:TextBox>
                            <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ControlToValidate="txtCNIC" ErrorMessage="RequiredFieldValidator" ForeColor="#FF3300" SetFocusOnError="True" ValidationGroup="Complaints">CNIC is Required</asp:RequiredFieldValidator>
                            <asp:RangeValidator
                                ControlToValidate="txtCNIC"
                                MinimumValue="14"
                                MaximumValue="16"
                                Type="String"
                                ValidationGroup="Complaints"
                                EnableClientScript="false"
                                Text="CNIC can not be longer than 15 characters"
                                runat="server" />
<asp:Button ID="btnSave"  CssClass="btn btn-success"  runat="server" Text="Save" 
         ValidationGroup="Complaints" ClientIDMode="Static" OnClick="btnSave_Click" />

Upvotes: 1

Views: 1687

Answers (2)

julealgon
julealgon

Reputation: 8172

Like DaveParsons mentioned in the comments, I also feel like a RegularExpressionValidator would be the best approach here.

You can configure it to validate a specific length range as evidenced in this answer.

Upvotes: 0

Yannick Blondeau
Yannick Blondeau

Reputation: 9621

ASP RangeValidator is meant to validate that the input is within a given range, whereas in your case it seems you want to validate the input length. To do this, you can do something like this:

In your page, replace the RangeValidator by a CustomValidator:

<asp:CustomValidator runat="server" id="txtCNICValidator"
     controltovalidate="txtCNIC" ClientValidationFunction="validateCnic"
     errormessage="CNIC must be exactly 15 characters long!" />

And add the corresponding validation function in your javascript:

<script type="text/javascript">
  function validateCnic(sender, args) {
    args.IsValid = (args.Value.length == 15);
  }
</script>

Upvotes: 1

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