form1.cs

Visual C#2005程序设计教程

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace WinApp7_4
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
        int x = 15, y = 18;
        private System.Windows.Forms.TextBox txtA;
		private System.Windows.Forms.TextBox txtB;
        private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Button button1;
		/// <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 窗体设计器生成的代码
		/// <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.txtA = new System.Windows.Forms.TextBox();
            this.txtB = new System.Windows.Forms.TextBox();
            this.label1 = new System.Windows.Forms.Label();
            this.button1 = new System.Windows.Forms.Button();
            this.SuspendLayout();
            // 
            // txtA
            // 
            this.txtA.Location = new System.Drawing.Point(43, 50);
            this.txtA.Name = "txtA";
            this.txtA.Size = new System.Drawing.Size(86, 25);
            this.txtA.TabIndex = 0;
            // 
            // txtB
            // 
            this.txtB.Location = new System.Drawing.Point(150, 50);
            this.txtB.Name = "txtB";
            this.txtB.Size = new System.Drawing.Size(95, 25);
            this.txtB.TabIndex = 1;
            // 
            // label1
            // 
            this.label1.AutoSize = true;
            this.label1.Location = new System.Drawing.Point(13, 23);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(277, 15);
            this.label1.TabIndex = 2;
            this.label1.Text = "调用方法，传递参数之前两个变量的值：";
            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point(97, 98);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(75, 27);
            this.button1.TabIndex = 4;
            this.button1.Text = "调用";
            this.button1.Click += new System.EventHandler(this.button1_Click);
            // 
            // Form1
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(8, 18);
            this.ClientSize = new System.Drawing.Size(288, 157);
            this.Controls.Add(this.button1);
            this.Controls.Add(this.label1);
            this.Controls.Add(this.txtB);
            this.Controls.Add(this.txtA);
            this.Name = "Form1";
            this.Text = "按引用传递参数";
            this.Load += new System.EventHandler(this.Form1_Load);
            this.ResumeLayout(false);
            this.PerformLayout();

		}
		#endregion

		/// <summary>
		/// 应用程序的主入口点。
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		public void Swap(ref int a,ref int b)
		{
			int c=a;a=b;b=c;
		}

		private void button1_Click(object sender, System.EventArgs e)
		{
            Swap(ref x, ref y);
            label1.Text = "调用方法，传递参数之后两个变量的值:";
            txtA.Text = x.ToString();
            txtB.Text = y.ToString();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            txtA.Text = x.ToString();
            txtB.Text = y.ToString();
        }
	}
}