技术资料 > .Net专区 > winform应用 : C#如何实现两个WINFORM之间的访问

C#如何实现两个WINFORM之间的访问

March 25,2004

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
{
/// <summary>
/// 作者：Davi
/// </summary>
//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。