（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;
                }
            }  

        }
    }  Form3C#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！