Open New Window from asp button click

3. Open New Window using ScriptManager
Just on button click, we can register the script to open new window. Let me show this on button click event hander.

protected void btnClick_Click(object sender, EventArgs e)
{
string url = "MyNewPage.aspx?ID=1&cat=test";
string fullURL = "window.open('" + url + "', '_blank', 'height=500,width=800,status=yes,toolbar=no,menubar=no,location=no,scrollbars=yes,resizable=no,titlebar=no' );";
ScriptManager.RegisterStartupScript(this, typeof(string), "OPEN_WINDOW", fullURL, true);
}

Here we don’t need to add attribute to the button. This just will open new window with the URL specified. And please also note the properties of the new pop-up window.