Delegate to modify the control attributes in form in other classes

In general, we need to display the prompt information on the main interface from time to time in other business classes. The following method can be used:

Form1.cs

Using system;

Using system. Collections. Generic;
Using system. componentmodel;
Using system. Data;
Using system. drawing;
Using system. LINQ;
Using system. text;
Using system. Threading;
Using system. Windows. forms;

Namespace windowsformsapplication2
{

Public partial class form1: Form
{

Public form1 ()
{
Initializecomponent ();
}

Private void form1_load (Object sender, eventargs E)
{
Testdelegate TD = new testdelegate ();
TD. cb = safesettext;
Thread th = new thread (New threadstart (TD. Test ));
Th. Start ();
}

Public void safesettext (string text)
{
If (this. invokerequired)
{
_ Safesettextcall call = delegate (string S)
{
This. label1.text = s;
};

This. Invoke (call, text );
}
Else
This. label1.text = text;
}

Public Delegate void _ safesettextcall (string text );
}
}

Testdelegate. CS

Using system;
Using system. Collections. Generic;
Using system. LINQ;
Using system. text;
Using system. Threading;

Namespace windowsformsapplication2
{
Public Delegate void callback (string MSG );

Public class testdelegate
{
Public callback CB;
Public testdelegate ()
{

}
Public void test ()
{
For (INT I = 0; I <100; I ++ ){
CB (I. tostring ());
Console. writeline (I. tostring ());
Thread. Sleep (1000 );
}
}
}

}

 

Delegate to modify the control attributes in form in other classes