Question

I am having a drop down with some values which are binded from Database. When i select a particular option i would to open the corresponding page in new tab i write the following which doesn’t work so can any one help me

protected void ddlAuthoritytype_SelectedIndexChanged(object sender, EventArgs e)
{
string ddl = ddlAuthoritytype.SelectedValue;
switch (ddl)
{
  case "AL":
  Response.Write("<script>Window.Open('alabama-state-tax-calculator.aspx');</script>");`
}
}

Answer 1

Use this:

protected void ddlAuthoritytype_SelectedIndexChanged(object sender, EventArgs e)
{
    var port = Request.Url.IsDefaultPort ? "" : ":" + Request.Url.Port.ToString();

    string ddl = ddlAuthoritytype.SelectedValue;
    switch (ddl)
    {
        case "AL":
            var script = string.Format("window.open('{0}://{1}{2}{3}')", Request.Url.Scheme, Request.Url.Host, port, ResolveUrl("~/alabama-state-tax-calculator.aspx"));
            ScriptManager.RegisterStartupScript(this, this.GetType(), "newWindow",script, true);
            break;
    }
}