Set Initial Focus on Page [ASP.NET/C#]

If you want to set Initial Focus on a page, here is a simple function that allows you to do just that. I usually have this in my Global.asax.cs file and call it on every page with a form.

public static void SetFocus(System.Web.UI.Page pg, string ControlName)
  {
  System.Text.StringBuilder jScript = new System.Text.StringBuilder();

  jScript.Append("< script language='JavaScript' >");
  jScript.Append("document.getElementById('" + ControlName + "').focus();");
  jScript.Append("< /script >");

  pg.RegisterStartupScript("setFocus", jScript.ToString());
  }

Before and after the >< symbols, there is no need for a space! Now, to use this function, use the following code in any form’s Page_Load event:

if (!this.IsPostBack)
  Global.SetFocus(this.Page, "ControlName");

Where ControlName is the name of the first control you want to set focus to. It’s also a good practice to set tabindex for all controls on the form.