Dynamically Enable or Disable Required Field Validator in ASP.Net 3.5

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Dear Friends,

Can any one help me how to enable or disable the required field validator control based on selection of Dropdown list in asp.net 3.5.I have worked with the same peice of code in asp.net 2.0 and there it is working fine.

Regards,
P.Sri Pavan

Posted 9-Nov-10 23:50pm

sreepavan150385

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jim lahey 10-Nov-10 6:06am

if it works in 2.0 you should be ok in 3.5 also

Ankur^\m/ 10-Nov-10 6:32am

As Jim said, it should work fine with 3.5 also.
Are you getting any error? Can you put up your relevant code here?

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Sunasara Imdadhusen · Answer 1 · 2010-11-10T02:01:00

Hi,

Enable or Disable ASP.Net Validation on client side
rfvOther: is a Required Field Validator
Collapse

C#

//Syntax:
ValidatorEnable(ValidatorContronName,Boolean);
//Explanation:ValidatorContronName - This is ClientID of the Validation control.
Boolean - true(Enable) / false(Disable)
//Example:
ValidatorEnable(document.getElementById('<%=rfvOther.ClientID%>'), false);

You can implement this function according you logic.

Please do let me know, if you have any doubt.

Please provide "Vote":thumbsup: if this would be helpful, and make "Accept Answer" if this would be correct answer.:rose:

Thanks,
Imdadhusen

Ed Guzman · Answer 2 · 2010-11-10T02:52:00

You can easily disable the validator on the server side

Follow the example:

XML

<asp:DropDownList ID="DDL1" runat="server" AutoPostBack="true">
            <asp:ListItem Value="1">One</asp:ListItem>
            <asp:ListItem Value="2">Two</asp:ListItem>
            <asp:ListItem Value="3">Three</asp:ListItem>
        </asp:DropDownList>
        <asp:TextBox ID="txt" runat="server"></asp:TextBox>
        <asp:RequiredFieldValidator ID="Validator1" runat="server" ControlToValidate="txt"
            ErrorMessage="error"></asp:RequiredFieldValidator>
        <asp:Button runat="server" Text="Save" />

and this piece place into your server side page class:

C#

public partial class WebForm1 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Validator1.Enabled = Request[DDL1.UniqueID] == "2" ? false : true;
    }
}

When you select "Two" in your dropdown, it will disable the validator

vinay.Singh · Answer 3 · 2012-11-01T18:09:00

Solution 3

hi check this link

http://www.dotnetpools.com/2012/11/dynamically-enable-or-disable-validator.html[^]

Posted 1-Nov-12 18:09pm

vinay.Singh

Updated 28-Nov-13 1:49am

v2

Dynamically Enable or Disable Required Field Validator in ASP.Net 3.5

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