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This article introduces how ASP.NET programming to achieve pop-up window alarm prompt, the content is very detailed, interested friends can refer to, hope to be helpful to you.

The preface of ASP.NET programming pop-up window alarm prompt, in web applications, such as OA, often use some prompts, such as EMAIL arrived, make a prompt box like MSN, pop up to the user prompt, and then close. In the ajax of asp.net 2.0, this is not difficult to do now. I happened to see an article by a foreigner who explained that the following is a summary.

For example, there is a database table that stores EMAIL. When there is an EMAIL in the database table, it prompts the user to simply write a WEBSERVICE as follows.

The following is the referenced content:

[ScriptService] public class InboxService: System.Web.Services.WebService {[WebMethod] public int GetLatestNumberOfEmails () {int numberOfEmails = 0; using (SqlConnection conn = new SqlConnection (WebConfigurationManager.ConnectionStrings [0] .ConnectionString)) {using (SqlCommand cmd = new SqlCommand ("GetLatestNumberOfEmails", conn)) {cmd.CommandType = CommandType.StoredProcedure; conn.Open (); numberOfEmails = (int) cmd.ExecuteScalar ();}} return numberOfEmails;}}

Note that you need to call WEBSERICE through AJAX on the client side and add [ScriptService].

The realization of ASP.NET programming pop-up window alarm prompt in default.aspx, first add a updateprogress control, as follows

The following is the referenced content:

< asp:UpdateProgress DynamicLayout= "False" ID= "UpdateProgress1" runat= "server" > < ProgressTemplate > < div id= "modal" class= "modal" > < div class= "modalTop" > < div class= "modalTitle" > My Inbox < / div > < span style= "CURSOR: hand" onclick=_javascript:HidePopup () < img alt= "Hide Popup" src= "App_Themes/Default/images/close_vista.gif" border= "0" / > < / span > < / div > < div class= "modalBody" > You received < strong > < span id= "modalBody" > < / span > < / strong > Email (s). < / div > < / div > < / ProgressTemplate > < / asp:UpdateProgress >

Turn off the X button here, call the javascript script, and wait for the matrix.

Then, of course, add the scriptmanager control, as follows

The following is the referenced content:

< asp:ScriptManager ID= "ScriptManager1" runat= "server" > < Services > < asp:ServiceReference Path= "~ / InboxService.asmx" / > < / Services > < / asp:ScriptManager >

The webservice that we just wrote is called here.

The realization of ASP.NET programming pop-up window alarm prompt: Script

The following is the referenced content:

< script type= "text/javascript" > var numberOfEmails_original= 0; var app = Sys.Application; app.add_init (applicationInitHandler); function applicationInitHandler (sender, args) {InboxService.GetLatestNumberOfEmails (OnCurrentNumberOfEmailsReady);}

First of all, the default is 0 messages, of course, there is a variable to store the current number of messages, and then the webserice method is called in the initialization event in ajax, and the OnCurrentNumberOfEmailsReady method is called back.

The following is the referenced content:

The function OnCurrentNumberOfEmailsReady (result, userContext, methodName) {numberOfEmails_original= result; / / StartChecking StartChecking ();} OnCurrentNumberOfEmailsReady method returns the result of the WEBSERVICE call (how many letters are RESULT in the current state) to the variable, and then calls the sartchecking () method function StartChecking () {InboxService.GetLatestNumberOfEmails (OnLastestNumberOfEmailsReady);} startchecking method, which continues to call back the OnLastestNumberOfEmailsReady method function OnLastestNumberOfEmailsReady (result, userContext, methodName) {var numberOfEmails_new= result If (numberOfEmails_new > numberOfEmails_original) {ShowPopup (); $get ("modalBody") [xss_clean] = numberOfEmails_new-numberOfEmails_original; / / Update the count here numberOfEmails_original= numberOfEmails_new;} / / Start checking again window.setTimeout (StartChecking, 10000);}

This method uses the current number of messages-the original number of messages, to find out how many new messages have been added, and then assign the result to the modalbody in the display area, and remember to update the variable of the current number of messages (numberOfEmails_original= numberOfEmails_new;).

Then use setimeout to set the check every 10000 milliseconds.

The following is the referenced content:

Function ShowPopup () {$get ("UpdateProgress1"). Style.visibility= "visible"; $get ("UpdateProgress1"). Style.display= "block";} function HidePopup () {$get ("UpdateProgress1"). Style.visibility= "hidden"; $get ("UpdateProgress1"). Style.display= "none";} < / script >

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