Summary of several methods for Asp.Net alert to pop up prompt information

1.ClientScript.RegisterStartupScript(GetType(),"message","<script>alert('The first way, no white screen!');</script>");

2.HttpContext.Current.Response.Write("<script>alert('The second way, there is a white screen!')</script>");

3.public static void Show (System.Web.UI.Page page, string msg)
 {
   page.ClientScript.RegisterStartupScript(page.GetType(), "message", "");
}
Show(this, "The third method, no white screen, no deformation!");

4.Response.Write("<script>alert('The fourth way, there is a white screen!')</script>");

5.window.showModalDialog('XXX .aspx', '', 'dialogWidth:429px;dialogHeight:200px;location:no,menubar:no,toolbar:no,status:no');

6.Page.clientscript.registerstartupscript(this. gettype(), "", "<script>window.open('../issue/issueallcomment.aspx');</script>");
can be solved.

7 .
Use the function of the ajax component as follows:
System.Web.UI.ScriptManager.RegisterStartupScript(this, this.GetType(), "opennewwindow", "alert('Pop-up box content!');", true);

8.
Place a control in the last line of the body of the page, and assign a value to this control in the code page, such as:

label.Text="< script>alert('Pop-up box content! ;