Three ways to pop up information windows in C #

Pop-up message box, which is a browser client event. The server does not have the ability to eject the message box.

Method One:

For an ASP. NET page if you need to pop up a message box, you need to register a JavaScript script on the foreground page, using the alert method. Use the Clientscript.registerstartupscript () method to register the script.

Clientscript.registerstartupscript ()

RegisterStartupScript (Type,key,script)

Type: Types of script events, typically with this. GetType () get

Key: The name of the script event cannot be duplicated.

Script:javascript script.

Example:

(1) String script= "<script>alert (' Registration information ') </scritp>"; Clientscript.registerstartupscript (this. GetType (), "success", script);

(2) The message box prompts you to refresh this page. String script= "<script>alert (' Registration information ');location.href=location.href</scritp>"; Clientscript.registerstartupscript (this. GetType (), "success", script);

(3) The message box prompts you to go to the new page. String script= "<script>alert (' registration information '); location.href= ' index.aspx ' </scritp>"; Clientscript.registerstartupscript (this. GetType (), "success", script);

(4) Open a new page in a new window. String script= "<script>alert (' registration information '); window.open (' index.aspx ') </scritp>"; Clientscript.registerstartupscript (this. GetType (), "success", script);

Windos.open () corresponds to Window.close (), one for opening a new window and one for closing the current window.

Summary: Modal window. This method is the recommended method.

Because it is used frequently, you can put this method into a class. To do this: Create a new Web site---The site root right-click---Add an ASP.---Select App_Code----Right-click the App_Code---Add a new Item---Select the class to which the new file is completed.

The new method in the class is as follows:

Pop-up message, info content is info

public static void Alert (string info, page p)
{
String script = "<script>alert ('" +info+ "') </script>";
P.clientscript.registerstartupscript (P.gettype (), "", script);
}

The method that calls the class is:

The class name. Alert (registration information, this); Because the method is a static method, it is called directly from the class name. If the method is not a static method, the object needs to be instantiated after the call. Instantiate as follows:

Class name A=new class name (); Then call: A.alert (registration successful, this);

Method Two: Response.Write ();

String script= "<script>alert (' Registration information ') </scritp>"; Response.Write (script);

Summary: Modal window, the pop-up window does not close, the page can not be manipulated. Not recommended, this pop-up window will deform the page.

Method Three: MessageBox.Show ("registration success");

Before using this method, you need to prepare the following:

Site Directory Right-click---Add Reference---find System.Windows.Forms, OK. Then add: Using System.Windows.Forms on the page, and then use this method in the page.

Summary: C # is often used in modal windows, Web sites (Web pages) are not modal windows, Web pages are not recommended, C # is recommended to use.

Three ways to pop up information windows in C #