Delegate--The value of 150525 between forms

Commission Summary

Summarize
As with Outputtime (), the compiler will put Outputtime (); compile into Outputtime.invoke ();
1 Defining delegate data types
2 Defining delegate variables
3 Determining whether a delegate type exists, using a delegate
if (outputtime! = null)
// {
As with Outputtime (), the compiler will put Outputtime (); compile into Outputtime.invoke ();
Outputtime.invoke ();
// }
File Write operation File.writealltext (@ "Aaa.text", System.DateTime.Now.ToString ("Yy-mm-dd hh-mm-ss"));

debugger, set breakpoints at the location you want to view, F10 next

General program to display time in two ways (console and write file)

Main program:classProgram {Static voidMain (string[] args) {Class1 T1=NewClass1 (); T1.outputtime=M1;                       T1.output1_time (); Class2 T2=NewClass2 (); T2.outputtime=M2;            T2.output1_time ();        Console.readkey (); }        Static voidM1 () {Console.WriteLine ("Current time: {0}", System.DateTime.Now.ToString ()); }        Static voidM2 () {File.writealltext (@"Aaa.text", System.DateTime.Now.ToString ("YY-MM-DD Hh-mm-ss")); }} class//define a delegate type     Public Delegate voidDele_time ();  Public classClass1 { PublicDele_time Outputtime;  Public voidOutput1_time () {Console.WriteLine ("--------------------------------------------------"); Console.WriteLine ("--------------------------------------------------"); if(outputtime!=NULL) {outputtime (); } Console.WriteLine ("--------------------------------------------------"); Console.WriteLine ("--------------------------------------------------"); }    }     Public classClass2 { PublicDele_time Outputtime;  Public voidOutput1_time () {Console.WriteLine ("--------------------------------------------------"); Console.WriteLine ("--------------------------------------------------"); if(Outputtime! =NULL)            {                //as with Outputtime (), the compiler will put Outputtime (); compile into Outputtime.invoke ( );Outputtime.invoke (); } Console.WriteLine ("--------------------------------------------------"); Console.WriteLine ("--------------------------------------------------"); }    }

Pass-through code between forms

1Defining delegate Types Public Delegate voidDele_chuanzhi (stringstr); Form1 codePrivate voidButton1_Click (Objectsender, EventArgs e) {Form2 F2=NewForm2 (); F2.            Show (); F2.chuanzhi=updatebtn; }  Private voidUPDATEBTN (stringstr) {TextBox1.Text=str; }form2 CodePrivate voidTextbox1_keyup (Objectsender, KeyEventArgs e) {            //This . Text = TextBox1.Text;            stringUinput = This. TextBox1.Text; if(Chuanzhi! =NULL) {Chuanzhi (uinput); }        }

Delegate--The value of 150525 between forms