C#如何实现两个WINFORM之间的访问

www.chinacs.net 2002-5-9 中文C#技术站

在VB中我们通常可以通过form1!text1.text等进行窗体之间的访问，但是在C#中我们发现这样是行不同的，通过我这几天的研究，终于想出了进行两个WINFORM之间访问的办法，那就是通过一个中间的类进行实例的控制，代码如下：

//=============================
//Form1.cs
//=============================
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data; 

namespace WA_Test1
{
    //委托
    public delegate string chktext(int myInt);

    public class Form1 : System.Windows.Forms.Form
    {
        private System.Windows.Forms.Button button1;
        public System.Windows.Forms.TextBox textBox1;
        //public Form1 frm1=new Form1();
        /// <summary>
        /// 必需的设计器变量。
        /// </summary>
        private System.ComponentModel.Container components = null;

        public Form1()
        {
            //
            // Windows 窗体设计器支持所必需的
            //
            InitializeComponent();

            //
            // TODO: 在 InitializeComponent 调用后添加任何构造函数代码
            //
        }

        /// <summary>
        /// 清理所有正在使用的资源。
        /// </summary>
        protected override void Dispose(bool disposing)
        {
            if (disposing)
            {
                if (components != null)
                {
                    components.Dispose();
                }
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code
        /// <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            this.button1 = new System.Windows.Forms.Button();
            this.textBox1 = new System.Windows.Forms.TextBox();
            this.SuspendLayout();
            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point(128, 56);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(56, 24);
            this.button1.TabIndex = 0;
            this.button1.Text = "button1";
            this.button1.Click += new System.EventHandler(this.button1_Click);
            // 
            // textBox1
            // 
            this.textBox1.Location = new System.Drawing.Point(16, 56);
            this.textBox1.Name = "textBox1";
            this.textBox1.Size = new System.Drawing.Size(88, 21);
            this.textBox1.TabIndex = 1;
            this.textBox1.Text = "textBox1";
            // 
            // Form1
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
            this.ClientSize = new System.Drawing.Size(304, 117);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {
                this.textBox1,
                this.button1});
            this.MaximizeBox = false;
            this.Name = "Form1";
            this.Text = "Form1";
            this.ResumeLayout(false);
        }
        #endregion

        /// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main()
        {
            Form3 frm3 = new Form3();
            Application.Run(frm3.GetForm1());
        }

        private void button1_Click(object sender, System.EventArgs e)
        {
            Form3 frm3 = new Form3();
            (frm3.GetForm2()).Show();
            //frm3.InputBox("Title","please enter some value","20");
            //MessageBox.Show(frm3.InputBox().ToString());
        }

        private void button2_Click(object sender, System.EventArgs e)
        {
            //
        }

    }
}


//=======================================
// Form2.cs
//=======================================
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;

namespace WA_Test1
{
    /// <summary>
    /// 作者：Davi
    /// </summary>
    public class Form2 : System.Windows.Forms.Form
    {
        private System.Windows.Forms.TextBox textBox1;
        private System.Windows.Forms.Button button1;
        /// <summary>
        /// 必需的设计器变量。
        /// </summary>
        private System.ComponentModel.Container components = null;

        public Form2()
        {
            //
            // Windows 窗体设计器支持所必需的
            //
            InitializeComponent();

            //
            // TODO: 在 InitializeComponent 调用后添加任何构造函数代码
            //
        }

        /// <summary>
        /// 清理所有正在使用的资源。
        /// </summary>
        protected override void Dispose(bool disposing)
        {
            if (disposing)
            {
                if (components != null)
                {
                    components.Dispose();
                }
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code
        /// <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            this.textBox1 = new System.Windows.Forms.TextBox();
            this.button1 = new System.Windows.Forms.Button();
            this.SuspendLayout();
            // 
            // textBox1
            // 
            this.textBox1.Location = new System.Drawing.Point(16, 40);
            this.textBox1.Name = "textBox1";
            this.textBox1.Size = new System.Drawing.Size(152, 21);
            this.textBox1.TabIndex = 0;
            this.textBox1.Text = "textBox1";
            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point(56, 72);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(168, 24);
            this.button1.TabIndex = 1;
            this.button1.Text = "更改Form1的TextBox1";
            this.button1.Click += new System.EventHandler(this.button1_Click);
            // 
            // Form2
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
            this.ClientSize = new System.Drawing.Size(272, 117);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {
                this.button1,
                this.textBox1});
            this.Name = "Form2";
            this.Text = "Form2";
            this.ResumeLayout(false);
        }
        #endregion

        private void button1_Click(object sender, System.EventArgs e)
        {
            Form3 frm3 = new Form3();
            (frm3.GetForm1()).textBox1.Text = this.textBox1.Text;
        }
    }
}


//===============================================
// Form3.cs
//===============================================
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;

namespace WA_Test1
{
    /// <summary>
    /// 作者：Davi
    /// </summary>
    public class Form3
    {
        /// <summary>
        /// 必需的设计器变量。
        /// </summary>
        private static Form1 frm1;
        private static Form2 frm2;
        public Form3()
        {
            /// <summary>
            /// 清理所有正在使用的资源。
            /// </summary>
        }
        public void CreateForm1()
        {
            frm1 = new Form1();
        }
        public void CreateForm2()
        {
            frm2 = new Form2();
        }

        public Form1 GetForm1()
        {
            if (frm1 == null)
            {
                CreateForm1();
            }
            return frm1;
        }

        public Form2 GetForm2()
        {
            if (frm2 == null)
            {
                CreateForm2();
            }
            return frm2;
        }
    }

    /// <summary>
    /// 输入框窗体
    /// </summary>
}

*欢迎大家和我一起研究。