（转载）c# winform 用子窗体刷新父窗体,子窗体改变父窗体控件的值

第一种方法:

用委托,Form2和Form3是同一组

Form2

C#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 TestMouseMove  
    {  
        public delegate void SetVisiableHandler();  
      
        public partial class Form2 : Form  
        {  
            public Form2()  
            {  
                InitializeComponent();  
            }  
            private void button1_Click(object sender, EventArgs e)  
            {  
                Form3 frm = new Form3(new SetVisiableHandler(SetVisiable));  
                frm.Show();  
            }  
      
            private void SetVisiable()  
            {  
                SetVisiable(this.label1, !this.label1.Visible);  
            }  
      
            private void SetVisiable(Control control, bool visiable)  
            {  
                if (this.Controls.Contains(control))  
                {  
                    control.Visible = visiable;  
                }  
            }  
      
        }  
    }  
Form3
C#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 TestMouseMove  
    {  
        public partial class Form3 : Form  
        {  
            private SetVisiableHandler m_setVisible;  
      
            public Form3(SetVisiableHandler setvisible)  
            {  
                InitializeComponent();  
                this.m_setVisible = setvisible;  
            }  
            private void btnVisible_Click(object sender, EventArgs e)  
            {  
                if (this.m_setVisible != null)  
                {  
                    this.m_setVisible();  
                }  
            }  
      
        }  
    }  
第二种方法: 
用变量,Form4和Form5是同一组
Form4 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 TestMouseMove  
    {  
        public partial class Form4 : Form  
        {  
            public Form4()  
            {  
                InitializeComponent();  
            }  
     
            #region 子窗口刷新父窗口的值  
      
            private string strLabel1 = "";  
      
            public string StrLabel1  
            {  
                get  
                {  
                    return strLabel1;  
                }  
                set  
                {  
                    strLabel1 = value;  
                    this.label1.Text = strLabel1;  
                }  
            }  
            #endregion  
      
            private void button1_Click(object sender, EventArgs e)  
            {  
                Form5 form5 = new Form5(this);//这里注意传个this  
                form5.Show();  
            }  
        }  
    }  
Form5 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 TestMouseMove  
    {  
        public partial class Form5 : Form  
        {  
            Form4 form4 = new Form4();  
      
            public Form5(Form4 formFrm)//这个构造方法里有参数  
            {  
                form4 = formFrm; //这个必须要有  
                InitializeComponent();  
            }  
      
             
            private void button1_Click(object sender, EventArgs e)  
            {  
                form4.StrLabel1 = this.textBox1.Text;  
            }  
        }  
    }  
 

 文章转载来源：http://heisetoufa.iteye.com/blog/382684

第二种方法已经试过，不错！