WinForm 窗体间传递数据的一些方法[转]

public class frmMain:Form
{
...
frmControl controlForm= new frmControl( this);
controlForm.Show();
}

public class frmControl:Form // 子窗体，用来控制主窗体的某些显示！
{
private frmMain mainForm;
public frmControl(frmMain mainForm)
{
this.mainForm=mainForm;
}
private void button1_Click( object sender,EventArgs e)
{
frmMain.textBox1.Text= this.textBox1.Text;
// 把子窗体的文本框值传递给主窗体的文本框！
}
}

public class frmMain:Form,IChangeTitle
{
...
frmControl controlForm= new frmControl( this);
controlForm.Show();
public void ChangeTitle( string title)
{
this.Text=title;
}
}

public class frmControl:Form // 子窗体，用来控制主窗体的某些显示！
{
private IChangeTitle ichangeTitle;
public frmControl(IChangeTitle ichangeTitle)
{
this.ichangeTitle=ichangeTitle;
}
private void button1_Click( object sender,EventArgs e)
{
// 通过接口来调用方法
ichangeTitle.ChangeTitle( this.textBox1.Text);
}
}

// 主窗体给委托变量赋值就可以了：
public partial class MainForm : Form
{
private ChildForm loginForm = new ChildForm();
public MainForm()
{
InitializeComponent();
loginForm.TitleChanged = new
ChildForm.TitleChangedEventHandler(FormTitleChanged);
}

protected void FormTitleChanged( string title)
{
this.Text = title;
}

private void button1_Click( object sender, EventArgs e)
{
loginForm.Show();
}
}

public partial class ChildForm : Form
{
// 声明和定义委托
public delegate void TitleChangedHandler( string title);
public TitleChangedEventHandler TitleChanged;

public ChildForm()
{
InitializeComponent();
}
private void btn_Ok_Click( object sender, EventArgs e)
{
if (TitleChanged != null)
TitleChanged( " Test Title "); // 委托调用

}
}

// 主窗体订阅这个事件就可以了
public partial class MainForm : Form
{
private ChildForm loginForm = new ChildForm();
public MainForm()
{
InitializeComponent();
loginForm.TitleChanged +=
new ChildForm.TitleChangedEventHandler(FormTitleChanged);
}

protected void FormTitleChanged( object sender, ChildForm.TitleChangedEventArgs e)
{
this.Text = e.Title;
}

private void button1_Click( object sender, EventArgs e)
{
loginForm.Show();
}
}

public partial class ChildForm : Form
{
public class TitleChangedEventArgs : EventArgs // 事件参数类
{
private string title = "";
public string Title
{
get{ return title; }
set{ title = value; }
}
}
// 声明委托
public delegate void TitleChangedEventHandler( object sender, TitleChangedEventArgs e);
// 定义事件
public event TitleChangedEventHandler TitleChanged;

public ChildForm()
{
InitializeComponent();
}

private void btn_Ok_Click( object sender, EventArgs e)
{
TitleChangedEventArgs e1= new TitleChangedEventArgs();
e1.Title= " Login sucessed ";
OnTitleChanged(e1); // 触发事件

}
// 触发事件的方法
protected virtual void OnTitleChanged(TitleChangedEventArgs e)
{
if (TitleChanged != null)
TitleChanged( this, e);
}
}

本文转自钢钢博客园博客，原文链接：http://www.cnblogs.com/xugang/archive/2010/06/29/1767465.html，如需转载请自行联系原作者