在具有属性的两个表单之间传递数据[重复]

我正在 C# 中的 2 个窗口窗体之间传递数据。 Form1 是主窗体，其文本框将接收从 form2_textbox 传递给它的文本并将其显示在其文本框 (form1_textbox) 中。

首先，form1 打开，带有一个空文本框和一个按钮，单击 form1_button 时，form2 打开。在 Form2 中，我在 form2_textbox 中输入文本，然后单击按钮 (form2_button)。单击此按钮的事件时，它将把文本发送到 form1 的文本框，form1 将以其空的 form1_textbox 和从 form2 接收的文本成为焦点。

我正在使用属性来实现此任务。 FORM2.CS

公共部分类 Form2 ：表格 { //以形式2声明事件 公共事件 EventHandler SomeTextInSomeFormChanged；

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

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();

    }
}

在form2中，您需要创建事件并在form1中订阅它。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

Update:

Form2:

public Form2()
{
    InitializeComponent();
}

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

Form1:

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();
    }
}