frmmain.cs

北大青鸟-Cs学生用书-教师用书实例源代码.rar

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

namespace Calculator
{
	/// <summary>
	/// frmMain 的摘要说明。
	/// </summary>
	public class frmMain : System.Windows.Forms.Form
	{
		private System.Windows.Forms.TextBox txtInput;
		private System.Windows.Forms.Button btnSubmit;
		private System.Windows.Forms.Label lblResult;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		public static void Main()
		{
			Application.Run(new frmMain());
		}

		public frmMain()
		{
			//
			// 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.txtInput = new System.Windows.Forms.TextBox();
			this.btnSubmit = new System.Windows.Forms.Button();
			this.lblResult = new System.Windows.Forms.Label();
			this.SuspendLayout();
			// 
			// txtInput
			// 
			this.txtInput.Location = new System.Drawing.Point(8, 8);
			this.txtInput.Name = "txtInput";
			this.txtInput.Size = new System.Drawing.Size(200, 21);
			this.txtInput.TabIndex = 0;
			this.txtInput.Text = "";
			// 
			// btnSubmit
			// 
			this.btnSubmit.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.btnSubmit.Location = new System.Drawing.Point(208, 8);
			this.btnSubmit.Name = "btnSubmit";
			this.btnSubmit.TabIndex = 1;
			this.btnSubmit.Text = "计算(&S)";
			this.btnSubmit.Click += new System.EventHandler(this.btnSubmit_Click);
			// 
			// lblResult
			// 
			this.lblResult.Location = new System.Drawing.Point(8, 40);
			this.lblResult.Name = "lblResult";
			this.lblResult.Size = new System.Drawing.Size(272, 23);
			this.lblResult.TabIndex = 2;
			// 
			// frmMain
			// 
			this.AcceptButton = this.btnSubmit;
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(292, 273);
			this.Controls.Add(this.lblResult);
			this.Controls.Add(this.btnSubmit);
			this.Controls.Add(this.txtInput);
			this.Name = "frmMain";
			this.Text = "frmMain";
			this.Load += new System.EventHandler(this.frmMain_Load);
			this.ResumeLayout(false);

		}
		#endregion

		private void btnSubmit_Click(object sender, System.EventArgs e)
		{
			Calculator calculator = new Calculator();
			double result = 0d;
			try
			{
				result = calculator.Calculat(txtInput.Text);
			}
			catch(Exception ex)
			{
				MessageBox.Show(ex.Message);
				return;
			}		
			lblResult.Text = txtInput.Text + " = " + result.ToString();
		}

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