传数据与属性

Question

我在C＃2种的窗口形式之间传递数据。 Form1中的主要形式，其文本框将接收传递给它的文本从form2_textbox &显示在其文本框（form1_textbox）。

首先，打开Form1中，用一个空的文本框和一个按钮，在点击form1_button，窗口2打开。在窗体2，我进入了form2_textbox &一个文本，然后单击该按钮（form2_button）。在点击这个按钮的情况下，它会发送文本到Form1的文本框& Form1中会实现对焦，其空form1_textbox从窗口2收到一个文本。

我使用性能来实现这一任务。 FORM2.CS

公共部分类窗体2：晶型 { //在形式2 公共事件的EventHandler SomeTextInSomeFormChanged声明事件;

public Form2() 
{ 
    InitializeComponent(); 

} 
public string get_text_for_Form1 
{ 
    get { return form2_textBox1.Text; } 
} 

//On the button click event of form2, the text from form2 will be send to form1: 

public void button1_Click(object sender, EventArgs e) 
{ 
    Form1 f1 = new Form1(); 
    f1.set_text_in_Form1 = get_text_for_Form1; 

//if subscribers exists 
if(SomeTextInSomeFormChanged != null) 
{ 
    SomeTextInSomeFormChanged(this, null); 
} 

} 

} 

Form1.cs的

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

    public string set_text_in_Form1 
    { 
     set { form1_textBox1.Text = value; } 
    } 

    private void form1_button1_Click(object sender, EventArgs e) 
    { 
     Form2 f2 = new Form2(); 
     f2.Show(); 
     f2.SomeTextInSomeFormChanged +=new EventHandler(f2_SomeTextInSomeFormChanged); 
    } 

    //in form 1 subcribe to event 
    Form2 form2 = new Form2(); 

    public void f2_SomeTextInSomeFormChanged(object sender, EventArgs e) 
    { 
     this.Focus(); 

    } 
} 

Answer 1

在窗口2，您需要创建事件和订阅它在Form1。就这样。

//declare event in form 2 
public event EventHandler SomeTextInSomeFormChanged; 

// call event in form2 text_changed event 
if(SomeTextInSomeFormChanged != null) 
    SomeTextInSomeFormChanged(this, null); 

//in form 1 subcribe to event 
var form2 = new Form2(); 
form2.SomeTextInSomeFormChanged += SomeHandlerInForm1WhereYouCanSetForcusInForm1 

更新：

窗体2：

public Form2() 
{ 
    InitializeComponent(); 
} 

public void button1_Click(object sender, EventArgs e) 
{ 
//if subscribers exists 
    if(SomeTextInSomeFormChanged != null) 
    { 
    SomeTextInSomeFormChanged(form2_textBox1, null); 
    } 
} 

Form1中：

public partial class Form1 : Form { 

    public Form1() { InitializeComponent(); } 

    private void form1_button1_Click(object sender, EventArgs e) 
    { 
     Form2 f2 = new Form2(); 
     f2.Show(); 
     f2.SomeTextInSomeFormChanged +=new EventHandler(f2_SomeTextInSomeFormChanged); 
    } 

    public void f2_SomeTextInSomeFormChanged(object sender, EventArgs e) 
    { 
     var textBoxFromForm2 = (TextBox)sender; 
     form1_textBox1.Text = textBoxFromForm2.Text 
     this.Focus(); 
    } 
} 

Answer 2

下面列出的网站有很好的教程。这种特殊的页面演示了如何可以做到这一点：

http://www.vcskicks.com/data-between-forms.php

Answer 3

这个怎么样。

((Form2)Application.OpenForms["Form2"]).textBox1.Text = "My Message";