C#

joe.bloggs@email.co.uk;jane.do@hotmail.com;member.11579870@codeproject.com;

Member 11713942 wrote:

but can't get it to work.

// in the 'dll
public Action<string> PrintJobDone { set; get; }

// method that gets an update on job status
private void PrintJobUpdate(bool jobdone, string currentjobname, int jobnumber, int jobslefttodo)
{
    // do some stuff ?

    if (jobdone && PrintJobDone != null) // handle jobdone == false, or PrintJobDone == null ?
    {
        PrintJobDone(string.Format("job completed: {0} / job#: {1} / jobslefttodo: {2}", currentjobname, jobnumber, jobslefttodo));
    }

    // do more stuff ?
}

private void Form1_Load(object sender, EventArgs e)
{
    yourDllInstance.PrintJobDone = printJobCallBack;
}

private void printJobCallBack(string msg)
{
   // display message to user
}

public delegate void Action (string msg);//First Declare this in .dll just below the namespace

private void doAction(string msg)
{
  // do some stuff which you want...
}

private Action print;
print = new Action (doAction);
A a= new A();
a.printaction = print;
printDoc();//this should be very careful,from where you are calling there you have to initialize the delegate

public Action printaction;//Declare this in another class let it be A

//Suppose im calling printDoc()
printDoc()
{
printaction(msg);//Now u can use this delegate anywhere in class A as like this
}

A a= new A();