Form between the values-CodePudding

A parent form, there is a number, a child form, there is a button, when I click on the button, the inside of the parent form number plus one, with entrust should be how to write, pray, answer

CodePudding user response:

LINQ is: are you sure?

CodePudding user response:

This example is a child form click the button, the parent form an additional data, and you want to be the basic agreement
https://blog.csdn.net/hanjun0612/article/details/50071539

CodePudding user response:

Child form:

 public delegate void TransfDelegate (int num); 
Public partial class Form2: Form 
{
The public event TransfDelegate TransfEvent; 
Public Form2 () 
{
InitializeComponent (); 
} 

Private void button1_Click (object sender, EventArgs e) 
{
TransfEvent (1); 
} 
}

Main form:

 public partial class Form1: Form 
{
Public _click () 
{
InitializeComponent (); 
} 

Private void button1_Click (object sender, EventArgs e) 
{
Form2 form=new Form2 (); 
Form. TransfEvent +=Form_TransfEvent; 
Form the ShowDialog (); 
} 

Private void Form_TransfEvent (int num) 
{
Label1. Text=(string) IsNullOrEmpty (label1. Text)? 0: int. Parse (label1. Text) + num.) the ToString (); 
} 
}

CodePudding user response:

You can create a new class, with static variables,
The class Class1
{
Public static int _a;
}
The main form loads Class1. _a=int. Parse (label2. Text);
When the child form click Class1. _a + +;
Main form to add a clock label2. Text=Class1. _a. The ToString ();

CodePudding user response:

Parent form name. The variable name + +;

CodePudding user response:

Child form

 
The Action Do; 

Private void Btn_Click (object sender, EventArgs e) 
{
Do (); 
}

Parent form

 
Private void Btn_Click (object sender, EventArgs e) 
{
Form1 Form1=new _click (); 
Form1. Do=Method; 
} 
int index=0; 
Void Method () 
{
Index++; 
Label. The Text=index. The ToString (); 
}

CodePudding user response:

Implementation method are many, static, public variables or methods, entrust, etc.;
Not static, the public that the # 2 has given the delegate, to give you specific code analysis:
child form:

 
Public delegate void AddValueHandle (your params);//define a delegate; 
The public event AddValueHandle AddValueEvent;//define a triggering event; 
. 
//use the following code in need of trigger, such as your child form button click event: 
If (AddValueHandle!=null) AddValueEvent. Invoke (your params);

The main form:
Such as child form instance: sonWnd;

 
SonWnd. AddValueEvent +=delegate {doing something};

Or:

 
SonWnd. AddValueEvent +=SonWnd_AddValueEvent; 

. 

Private void SettingCtrl_SaveClicked (your params) 
{
//dosomething 
}

CodePudding user response:

refer to 7th floor near 1210 response:

implementation method are many, static, public variables or methods, entrust, etc.;
Not static, the public that the # 2 has given the delegate, to give you specific code analysis:
child form:
 
Public delegate void AddValueHandle (your params);//define a delegate; 
The public event AddValueHandle AddValueEvent;//define a triggering event; 
. 
//use the following code in need of trigger, such as your child form button click event: 
If (AddValueHandle!=null) AddValueEvent. Invoke (your params); 
The main form:
Such as child form instance: sonWnd;
 
SonWnd. AddValueEvent +=delegate {doing something}; 
Or:
 
SonWnd. AddValueEvent +=SonWnd_AddValueEvent; 

. 

Private void SettingCtrl_SaveClicked (your params) 
{
//dosomething 
} 

 
SonWnd. AddValueEvent +=SonWnd_AddValueEvent; 

. 

Private void SonWnd_AddValueEvent (your params) 
{
//dosomething 
}