Dynamic error message for custom validator clientside

Question

I am using a custom validator to call a javascript function for validation. My problem is that I need to be able to change the error message dynamically. Here is the code:

            <asp:CustomValidator ID="CustomValidator1" runat="server" ClientValidationFunction="fcnValid1"
                ErrorMessage=""  Display="None" ValidateEmptyText="True">
            </asp:CustomValidator>

<asp:ValidationSummary ID="ValidationSummary1" runat="server" DisplayMode="List" ShowMessageBox="True" ShowSummary="False" />

    function fcnValid(source, args) {
        var Status = document.getElementById("<%=ddlStatus.ClientID%>").value

        if (Status == "In Underwriting") {
            if (document.getElementById("<%=txtRequestor.ClientID%>").value == "") {
                //sender.errormessage = "Test1"
                //sender.innerHTML = "Test2";
                document.getElementById("<%=txtRequestor.ClientID%>").focus();
                args.IsValid = false;
            }
        }
    }

Community · Accepted Answer · 2017-05-23 12:34:32Z

21

In your validation javascript you can change the message by accessing it via the source:

source.errormessage = "custom message here";

Found this question on SO that should give you some more information as well:

How can I rewrite the ErrorMessage for a CustomValidator control on the client?

edited May 23, 2017 at 12:34

CommunityBot

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answered Mar 22, 2011 at 17:02

Kelsey

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4 Comments

Mahmoud Farahat Over a year ago

doesn't work for me , source.errormessage = "custom message here"; works fine

Kelsey Over a year ago

@Mahmoud corrected posting. Typically if the answer is already in the comment you can submit an edit to the answer (especially when it is the accepted answer) to have it improved.

doiley Over a year ago

didn't work for me using ie9 but either of the following worked: source.innerHTML = "custom message here"; or $(source).html("custom message here");

Bat_Programmer Over a year ago

@doiley Thanks. It worked for me in both ie and chrome

Jay Magwadiya · Accepted Answer · 2014-08-22 06:31:39Z

11

well source.errormessage not worked correctly some time

what i suggest is to use source.innerText="error message";

answered Aug 22, 2014 at 6:31

Jay Magwadiya

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1 Comment

umutesen Over a year ago

I would like to know why innerText works instead of errormessage. Is it to do with .net version?

Mahmoud Farahat · Accepted Answer · 2013-01-08 12:19:57Z

1

source.errormessage = "custom message here";

answered Jan 8, 2013 at 12:19

Mahmoud Farahat

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