WinForm中的窗体传值有多种方法，自己结合相关资料总结了一下，大概有5种方式（或者更多）：
1、通过 ShowDialog()进行传值；
2、通过改造构造函数进行传值（加参数）；
3、通过公共静态类进行传值；
4、通过绑定事件进行传值；
5、使用Attribute（本人属初学，尚需深入研究，希望高手给与指正）
代码如下：
主窗体代码：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace WinTestValue
{
public partial class Main : Form
{
public Main()
{
InitializeComponent();
F004_ComonClass fc = new F004_ComonClass();
fc.Show();
}
方法１：通过ShowDialog进行页面传值#region 方法１：通过ShowDialog进行页面传值
private void btn_ok_Click(object sender, EventArgs e)
{
F001_ShowDialog fs = new F001_ShowDialog();
if (fs.ShowDialog() == DialogResult.OK)
{
this.tbx_value.Text = F001_ShowDialog.returnValue;
MessageBox.Show("从F002_ShowDialog传值到Main窗体成功！", "Success",
MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
private void btn_ok1_Click(object sender, EventArgs e)
{
F001_ShowDialog fs = new F001_ShowDialog();
if (fs.ShowDialog() == DialogResult.OK)
{
this.tbx_value.Text = fs.ReturnValue();
MessageBox.Show("从F002_ShowDialog传值到Main窗体成功！", "Success1",
MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
private void btn_ok2_Click(object sender, EventArgs e)
{
F001_ShowDialog fs = new F001_ShowDialog();
if (fs.ShowDialog() == DialogResult.OK)
{
this.tbx_value.Text = fs.RValue;
MessageBox.Show("从F002_ShowDialog传值到Main窗体成功！");
}
}
#endregion
方法2: 通过构造函数进行页面传值#region 方法2: 通过构造函数进行页面传值
private void btn_gouzao_Click(object sender, EventArgs e)
{
F002_GouZao gz = new F002_GouZao(this);
gz.Show();
}
#endregion
//定义textbox属性
public TextBox Tvalue
{
get
{
return this.tbx_value;
}
}
private void btn_cancel_Click(object sender, EventArgs e)
{
this.Close();
}
方法４：通过绑定事件进行传值#region 方法４：通过绑定事件进行传值
private void btn_event_Click(object sender, EventArgs e)
{
F003_Event fe = new F003_Event();
fe.myenent +=new MyEventHandler(fe_myenent);
fe.ShowDialog();
}
private void fe_myenent(object sender, MyEvent e)
{
this.tbx_value.Text += e.MValue;
}
#endregion
方法３：通过公共静态类进行传值#region 方法３：通过公共静态类进行传值
private void btnComDate_Click(object sender, EventArgs e)
{
//F004_ComonClass fc = new F004_ComonClass();
//fc.ShowDialog();
this.tbx_value.Text = ComonData.sTextBox;
}
#endregion
方法５：使用Attribute#region 方法５：使用Attribute
protected override void WndProc(ref Message m)
{
if (m.Msg = "")
{
}
base.WndProc(ref m);
}
#endregion
}
}
F001_ShowDialog的代码：
public partial class F001_ShowDialog : Form
{
//第一种类型
//定义一个变量
public static string returnValue;
//第二种类型
//定义一个方法
public string ReturnValue()
{
return this.tbx_value.Text.Trim();
}
//第三种类型
//定义一个属性
private string _value;
public string RValue
{
get
{
return _value;
}
set
{
_value = value;
}
}
public F001_ShowDialog()
{
InitializeComponent();
}
private void btn_ok_Click(object sender, EventArgs e)
{
returnValue = this.tbx_value.Text.Trim();
}
private void btn_ok1_Click(object sender, EventArgs e)
{
_value = this.tbx_value.Text.Trim();
}
}
F002_GouZao的代码：
public partial class F002_GouZao : Form
{
//定义Main窗体的实例
private Main main;
//public F003_GouZao()
//{
// InitializeComponent();
//}
public F002_GouZao(Main m)
{
InitializeComponent();
main = m;
}
private void btn_ok_Click(object sender, EventArgs e)
{
main.Tvalue.Text = this.tbx_value.Text.Trim();
MessageBox.Show("成功！");
}
}
F004_ComonClass的代码：
public partial class F004_ComonClass : Form
{
public F004_ComonClass()
{
InitializeComponent();
//ComonData.sTextBox = this.tbxInfo.Text.Trim().ToString();
}
private void btn_data_Click(object sender, EventArgs e)
{
ComonData.sTextBox = this.tbxInfo.Text.Trim().ToString();
}
}
F003_Event的代码：
public partial class F003_Event : Form
{
//定义一个事件
public event MyEventHandler myenent;
public F003_Event()
{
InitializeComponent();
}
private void btn_ok_Click(object sender, EventArgs e)
{
if (myenent != null)
{
myenent(this,new MyEvent(this.tbx_value.Text.Trim()));
}
}
}
自定义的委托和事件的代码：
public delegate void MyEventHandler(object sender, MyEvent e);
public class MyEvent : EventArgs
{
private string mvalue;
public string MValue
{
get
{
return mvalue;
}
}
public MyEvent(string s)
{
mvalue = s;
}
}
// 定义一个公共数据类
public static class ComonData
{
public static string sTextBox;
}