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Asked: 2026-05-25T16:47:42+00:00

So, i have an aspx page which looks like this: <%@ Page Language=C# AutoEventWireup=true

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So, i have an aspx page which looks like this:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

    </div>
    </form>
</body>
</html>

I would like to know, how I can write JavaScript (e.g. jQuery) code that will call a function from my C# Code. Lets say this is my C# method:

protected void XXX(object sender, EventArgs e)
{
    Response.Redirect("pagewho?");
}

Thanks again, Alon. 🙂

EDIT:

This is the full code i am using the moment:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
  <script type="text/javascript">
      validateStuff = function () {
          var isValid = true;
          var txt = document.getElementById("TextBox1");

          if (txt) {
              if (txt.value.toLower() != "james") {
                  isValid = false;
              }
          }
          //perform validation and return true/false
          return isValid;
      }

  </script>
    <form id="form1" runat="server">
    <div>
    <asp:Button ID="Button1" runat="server" OnClientClick="return validateStuff();" OnClick="Button1_Click" />
        <br />
        <br />
        <asp:TextBox ID="TextBox1" runat="server" Height="25px" Width="135px"></asp:TextBox>
        <br />
        <br />
        <br />
    </div>
    </form>
</body>
</html>

but, no matter what i am wireting in the textbox, its return true. any help?

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1 Answer

  1. Editorial Team

    You can use __doPostBack from the script, and use the RaisePostBackEvent method in the code behind to perform your server-side logic. If you’re looking to do a redirect, this would probably be the best way.

    EDIT

    If you’re looking to do some validation in JavaScript when a button is clicked, use OnClientClick to perform your JavaScript validation, and return true if the validation succeeds.

    <asp:Button ID="Button1" runat="server" OnClientClick="return validateStuff();" OnClick="Button1_Click" />

    Your JavaScript validation:

    validateStuff = function(){
    var isValid = true;
    var txt = document.getElementById("<%=TextBox1.ClientID%>");
    if (txt.value.toLower() != "james"){
       isValid = false;
    }        
    return isValid;
}

    If the validateStuff function returns true, a postback will occur and you can handle your save/update logic in the button click event:

    protected void Button1_Click(object sender, EventArgs e)
{
    //save some stuff to the database

    string txtValue = TextBox1.Text.Trim();
}

    In JavaScript:

    redirectToAnotherPage = function(){
    __doPostBack("<%=SomeServerControl.ClientID%>", "someArgument");
}

    In the code-behind:

    protected override void RaisePostBackEvent(IPostBackEventHandler source, string eventArgument)
{
    //call the RaisePostBack event 
    base.RaisePostBackEvent(source, eventArgument);

    Response.Redirect("anotherpage.aspx");
}

    If all you’re looking to do is bring the user to another page, you can also do this:

    redirectToAnotherPage = function(){
    window.location.href = "somepage.aspx";
}
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