Hi Experts,

I want to implement a module which calls methods from a DLL containing the business logic.

This DLL was used in a windows application and should be reused in a new dotnetnuke project.

This DLL throws events (with text) to show the progress/state of the method (which calculate something).

Whats the best way tho show this events and not using the progress bar.

Instead a simple lable control would be enough.

Many thanks in advance and

Best regarst

Here ist the complete code:

Business Logic:

using System;
using System.Collections.Generic;
using System.Web;

public class CustomEventArgs : EventArgs
{
    public CustomEventArgs(string s)
    {
        message = s;
    }
    private string message;

    public string Message
    {
        get { return message; }
        set { message = value; }
    }
}

/// <summary>
/// Summary description for BusinessLogic
/// </summary>
public class BusinessLogic
{

    public event EventHandler<CustomEventArgs> StatusEvent;

 public BusinessLogic()
 {
       
 }

    public void DoSomething()
    {
        RaiseStatusEvent("Start");

        System.Threading.Thread.Sleep(60000);
        RaiseStatusEvent("Status 1");

        System.Threading.Thread.Sleep(60000);
        RaiseStatusEvent("Status 2");

        System.Threading.Thread.Sleep(60000);
        RaiseStatusEvent("Status 3");

        RaiseStatusEvent("Ende");
    }

    private void RaiseStatusEvent(string Info)
    {
        if (this.StatusEvent != null)
            StatusEvent(Info,new CustomEventArgs(Info));
    }

}

Default.aspx.c

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Runtime.Remoting.Messaging;
using System.Threading;

public partial class _Default : System.Web.UI.Page,ICallbackEventHandler
{
    static System.Collections.Generic.List<string> Messages;

    protected void Page_Load(object sender, EventArgs e)
    {
        Messages = new System.Collections.Generic.List<string>();
    }

    private void LongRunningMethod(string name)
    {
        BusinessLogic BL = new BusinessLogic();
        BL.StatusEvent += StatusEventHandler;
        BL.DoSomething();
       //Thread.Sleep(60000 * 5);//This will run for 5 mins
    }

    private void StatusEventHandler(object sender, CustomEventArgs e)
    {
        Messages.Add(e.Message);
    }

    private delegate void LongRun(string name);
    private delegate void Status(string Info);

    private IAsyncResult DoSomthing()
    {
        LongRun Long = new LongRun(LongRunningMethod);// Delegate will call LongRunningMethod
        IAsyncResult ar = Long.BeginInvoke("CHECK",new AsyncCallback(CallBackMethod),null);
        //”CHECK” will go as function parameter to LongRunningMethod
        return ar; //Once LongRunningMethod get over CallBackMethod method will be invoked.
    }
    private void CallBackMethod(IAsyncResult ar)
    {
        AsyncResult Result = (AsyncResult)ar;
        LongRun Long = (LongRun)Result.AsyncDelegate;
        Long.EndInvoke(Result);
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        Response.Write("Long running process is started");
        Session["result"] = null;
        IAsyncResult res = DoSomthing();
        Session["result"] = res;
        //You can redirect to some other page, prcoess will continue..
        //since we are using session variable it will be available on another page also
        //and you just need to check for process completion as we did in GetCallbackResult().
        //On that page also we will have to use ICallback for priodic check.
    }

    public string GetCallbackResult()
    {
        if (Session["result"] != null)
        {
            IAsyncResult res = (IAsyncResult)Session["result"];
            if (res.IsCompleted)//Checking whether process is over or not
            {
                return "SUCCESS";
            }
            else
            {
                System.Text.StringBuilder MessageText = new System.Text.StringBuilder();
                foreach (string item in Messages)
                {
                    MessageText.AppendLine("Message:" + item);
                }
                return MessageText.ToString();
            }
        }
        return "FAIL";

    }
   
    public void RaiseCallbackEvent(string args)
    {
    //IF any operation do it here.
    }

}

And finaly the html code of default.aspx:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" EnableSessionState="True"
    Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml...">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Long Running Process</title>
</head>
<body onload="CallServer();">
    <form id="form1" runat="server">
    <asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
    <div id="Wait">
        Click button to start long running process.</div>
    <div id="Message">
        Message goes here</div>

    <script language="javascript">
function CallServer()
{
window.document.getElementById("Wait").innerText = window.document.getElementById("Wait").innerText + ".";
<%= ClientScript.GetCallbackEventReference(this,"", "ShowResult", null) %>;
}
function ShowResult(eventArgument,context)
{
    if(eventArgument == "SUCCESS")
    {
        Done');
    }
    else {
    window.document.getElementById("Message").innerText = eventArgument;
    setTimeout("CallServer()",20000);//Priodic call to server.
    }
}  
    </script>

    </form>
</body>
</html>