form1 中 new form2的时候new form2(this),form2的构造函数中接受form1的引用 public Form2(Form1 frm1),然后定义一个From1类型变量接受参数,就可以使用form1了,要使用其中的控件需要在form1中把他们定义成public就行。 form1: using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data;
namespace f2parent { /// <summary> /// Summary description for Form1. /// </summary> public class Form1 : System.Windows.Forms.Form { public System.Windows.Forms.TextBox textBox1; private System.Windows.Forms.Button button1; /// <summary> /// Required designer variable. /// </summary> private System.ComponentModel.Container components = null;
public Form1() { // // Required for Windows Form Designer support // InitializeComponent();
// // TODO: Add any constructor code after InitializeComponent call // }
/// <summary> /// Clean up any resources being used. /// </summary> protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); }
#region Windows Form Designer generated code /// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// </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, 32); this.textBox1.Name = "textBox1"; this.textBox1.TabIndex = 0; this.textBox1.Text = "textBox1"; // // button1 // this.button1.Location = new System.Drawing.Point(88, 128); this.button1.Name = "button1"; this.button1.TabIndex = 1; this.button1.Text = "button1"; this.button1.Click += new System.EventHandler(this.button1_Click); // // Form1 // this.AutoScaleBaseSize = new System.Drawing.Size(5, 12); this.ClientSize = new System.Drawing.Size(292, 266); this.Controls.Add(this.button1); this.Controls.Add(this.textBox1); this.IsMdiContainer = true; this.Name = "Form1"; this.Text = "Form1"; this.ResumeLayout(false);
} #endregion
/// <summary> /// The main entry point for the application. /// </summary> [STAThread] static void Main() { Application.Run(new Form1()); }
private void button1_Click(object sender, System.EventArgs e) { Form2 frm2=new Form2(this); frm2.ShowDialog(); } } }
form2 using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms;
namespace f2parent { /// <summary> /// Summary description for Form2. /// </summary> public class Form2 : System.Windows.Forms.Form { private System.Windows.Forms.Button button1; /// <summary> /// Required designer variable. /// </summary> private System.ComponentModel.Container components = null; private Form1 form1;
public Form2(Form1 frm1) { // // Required for Windows Form Designer support // InitializeComponent(); form1=frm1;
// // TODO: Add any constructor code after InitializeComponent call // }
/// <summary> /// Clean up any resources being used. /// </summary> protected override void Dispose( bool disposing ) { if( disposing ) { if(components != null) { components.Dispose(); } } base.Dispose( disposing ); }
#region Windows Form Designer generated code /// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// </summary> private void InitializeComponent() { this.button1 = new System.Windows.Forms.Button(); this.SuspendLayout(); // // button1 // this.button1.Location = new System.Drawing.Point(184, 192); this.button1.Name = "button1"; this.button1.TabIndex = 0; this.button1.Text = "button1"; this.button1.Click += new System.EventHandler(this.button1_Click); // // Form2 // this.AutoScaleBaseSize = new System.Drawing.Size(5, 12); this.ClientSize = new System.Drawing.Size(292, 266); this.Controls.Add(this.button1); this.Name = "Form2"; this.Text = "Form2"; this.ResumeLayout(false);
} #endregion
private void button1_Click(object sender, System.EventArgs e) { form1.textBox1.Text="435134"; } } }

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