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 WindowsApplication1
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
    {
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.TextBox textBox1;
		private System.Windows.Forms.TextBox textBox2;
		/// <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.label2 = new System.Windows.Forms.Label();
            this.button1 = new System.Windows.Forms.Button();
            this.label3 = new System.Windows.Forms.Label();
            this.textBox1 = new System.Windows.Forms.TextBox();
            this.textBox2 = new System.Windows.Forms.TextBox();
            this.SuspendLayout();
            // 
            // label2
            // 
            this.label2.AutoSize = true;
            this.label2.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
            this.label2.Location = new System.Drawing.Point(54, 30);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(112, 15);
            this.label2.TabIndex = 1;
            this.label2.Text = "原商品的总金额";
            // 
            // button1
            // 
            this.button1.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
            this.button1.Location = new System.Drawing.Point(139, 75);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(80, 33);
            this.button1.TabIndex = 3;
            this.button1.Text = "打折";
            this.button1.Click += new System.EventHandler(this.button1_Click);
            // 
            // label3
            // 
            this.label3.AutoSize = true;
            this.label3.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
            this.label3.Location = new System.Drawing.Point(54, 144);
            this.label3.Name = "label3";
            this.label3.Size = new System.Drawing.Size(112, 15);
            this.label3.TabIndex = 4;
            this.label3.Text = "打折后商品总额";
            // 
            // textBox1
            // 
            this.textBox1.Location = new System.Drawing.Point(172, 25);
            this.textBox1.Name = "textBox1";
            this.textBox1.Size = new System.Drawing.Size(133, 25);
            this.textBox1.TabIndex = 7;
            // 
            // textBox2
            // 
            this.textBox2.Location = new System.Drawing.Point(172, 139);
            this.textBox2.Name = "textBox2";
            this.textBox2.Size = new System.Drawing.Size(133, 25);
            this.textBox2.TabIndex = 8;
            // 
            // Form1
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(8, 18);
            this.ClientSize = new System.Drawing.Size(358, 227);
            this.Controls.Add(this.textBox2);
            this.Controls.Add(this.textBox1);
            this.Controls.Add(this.label3);
            this.Controls.Add(this.button1);
            this.Controls.Add(this.label2);
            this.Name = "Form1";
            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterParent;
            this.Text = "商品打折计算";
            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());
		}

        //original cost原价  preferential price优惠价

		private void button1_Click(object sender, System.EventArgs e)
		{
			double k,m;
			k=double.Parse(textBox1.Text);
			if(k<1000)
			{m=k*0.9;}
			else
			{ m=k*0.8;}
			textBox2.Text=m.ToString();
		}

		
	}
}