Archive for January, 2010

Management of control focus is one of the common tasks when building web applications with effective and friendly user interface. In order to set focus on a certain control such as textboxes, buttons dropdowns after postback / after submit / on Page Load in ASP.NET 1.x, we can use a dynamic javascript block that facilitates Javascript’s focus() function.

private void SetFocus(String controlID) { // Build the JavaScript String System.Text.StringBuilder sb = new System.Text.StringBuilder(); sb.Append(“<script language=’javascript’>”); sb.Append(“document.getElementById(‘”); sb.Append(controlID); sb.Append(“‘).focus()”); sb.Append(“</script>”)

// Register the script code with the page. Page.RegisterStartupScript(“FocusScript”, sb.ToString()); }

For the above code, you need to pass the control’s id as the parameter, then define the Javascript function in a string variable then call the Page class to register the script.