Close ASPX page with a Button in ASP.Net using JavaScript or jQuery

Hi,

Please refer below code.

HTML

<script type="text/javascript">
    function CloseWindow() {
        window.close();
    }
</script>
<asp:Button Text="Close" runat="server" OnClick="Close" />

C#

protected void Close(object sender, EventArgs e)    
{
    Page.ClientScript.RegisterOnSubmitStatement(typeof(Page), "closePage", "window.onunload = CloseWindow();");
}

or you can use

Response.Write("<script language=javascript>this.window.opener = null;window.open('','_self'); window.close();</script>");

I hope this will help you out.