Question

I want to call a javascript function from my codebehind.
In my button click event handler I have:

protected void load_data_Click(object sender, EventArgs e)
{
    if (dt.Rows.Count == 1)
        {
            BindDl();                       
        }
        else
        {
            //if dt.rows.count! = 1 I want to call a JavaScript function where be one alert! how to do?
        }
}

Answer 1

This page will be helpful for you

// Get a ClientScriptManager reference from the Page class.
ClientScriptManager cs = Page.ClientScript;
Type cstype = this.GetType();
String csName = "MyAlertFunction";

// Check to see if the startup script is already registered.
if (!cs.IsStartupScriptRegistered(cstype, csName))
{
  String jsFunction = "yourFunctionHere()";
  cs.RegisterStartupScript(cstype, csName, jsFunction, true);
}