Is there a way to both register and run a JavaScript function in ASP.NET during a Page_Load event? I need the function to validate the content of a textbox, and if it is empty, disable a save button.
function Validate(source, arguments)
{
}
Is there a way to both register and run a JavaScript function in ASP.NET during a Page_Load event? I need the function to validate the content of a textbox, and if it is empty, disable a save button.
function Validate(source, arguments)
{
}
Try using ClientScriptManager.RegisterStartupScript
For a detailed example, check out this link
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
public void Page_Load(Object sender, EventArgs e)
{
// Define the name and type of the client scripts on the page.
String csname1 = "PopupScript";
Type cstype = this.GetType();
// Get a ClientScriptManager reference from the Page class.
ClientScriptManager cs = Page.ClientScript;
// Check to see if the startup script is already registered.
if (!cs.IsStartupScriptRegistered(cstype, csname1))
{
StringBuilder cstext1 = new StringBuilder();
cstext1.Append("<script type=text/javascript> alert('Hello World!') </");
cstext1.Append("script>");
cs.RegisterStartupScript(cstype, csname1, cstext1.ToString());
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>RegisterStartupScript</title>
</head>
<body>
<form id="form1" runat="server">
<div>
</div>
</form>
</body>
</html>
I trust this information will be useful for you
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