新建 文本文档.txt

ADO.NET教程,让你了解C#更精密的

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

namespace WindowsApplication2
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.Label label4;
		private System.Windows.Forms.Label label5;
		private System.Windows.Forms.Label label6;
		private System.Windows.Forms.TextBox textBox1;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.TextBox textBox2;
		private System.Windows.Forms.TextBox textBox3;
		private System.Windows.Forms.TextBox textBox4;
		private System.Windows.Forms.TextBox textBox5;
		private System.Windows.Forms.TextBox textBox6;

		private SqlConnection conn;
		private string connstr;
		private SqlCommand comm;
		private string commstr;
		private SqlDataReader myReader;
		private SqlParameter myParm;
		/// <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.label1 = new System.Windows.Forms.Label();
			this.label2 = new System.Windows.Forms.Label();
			this.label3 = new System.Windows.Forms.Label();
			this.label4 = new System.Windows.Forms.Label();
			this.label5 = new System.Windows.Forms.Label();
			this.label6 = new System.Windows.Forms.Label();
			this.textBox1 = new System.Windows.Forms.TextBox();
			this.button1 = new System.Windows.Forms.Button();
			this.textBox2 = new System.Windows.Forms.TextBox();
			this.textBox3 = new System.Windows.Forms.TextBox();
			this.textBox4 = new System.Windows.Forms.TextBox();
			this.textBox5 = new System.Windows.Forms.TextBox();
			this.textBox6 = new System.Windows.Forms.TextBox();
			this.SuspendLayout();
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(8, 24);
			this.label1.Name = "label1";
			this.label1.TabIndex = 0;
			this.label1.Text = "请输入姓名";
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(8, 72);
			this.label2.Name = "label2";
			this.label2.TabIndex = 1;
			this.label2.Text = "称谓";
			// 
			// label3
			// 
			this.label3.Location = new System.Drawing.Point(8, 112);
			this.label3.Name = "label3";
			this.label3.TabIndex = 2;
			this.label3.Text = "全名";
			// 
			// label4
			// 
			this.label4.Location = new System.Drawing.Point(8, 152);
			this.label4.Name = "label4";
			this.label4.TabIndex = 3;
			this.label4.Text = "职位";
			// 
			// label5
			// 
			this.label5.Location = new System.Drawing.Point(8, 192);
			this.label5.Name = "label5";
			this.label5.TabIndex = 4;
			this.label5.Text = "生日";
			// 
			// label6
			// 
			this.label6.Location = new System.Drawing.Point(8, 232);
			this.label6.Name = "label6";
			this.label6.TabIndex = 5;
			this.label6.Text = "地址";
			// 
			// textBox1
			// 
			this.textBox1.Location = new System.Drawing.Point(80, 24);
			this.textBox1.Name = "textBox1";
			this.textBox1.TabIndex = 6;
			this.textBox1.Text = "";
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(208, 24);
			this.button1.Name = "button1";
			this.button1.TabIndex = 7;
			this.button1.Text = "查找";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// textBox2
			// 
			this.textBox2.Location = new System.Drawing.Point(128, 72);
			this.textBox2.Name = "textBox2";
			this.textBox2.ReadOnly = true;
			this.textBox2.TabIndex = 8;
			this.textBox2.Text = "";
			// 
			// textBox3
			// 
			this.textBox3.Location = new System.Drawing.Point(128, 112);
			this.textBox3.Name = "textBox3";
			this.textBox3.ReadOnly = true;
			this.textBox3.TabIndex = 9;
			this.textBox3.Text = "";
			// 
			// textBox4
			// 
			this.textBox4.Location = new System.Drawing.Point(128, 144);
			this.textBox4.Name = "textBox4";
			this.textBox4.ReadOnly = true;
			this.textBox4.TabIndex = 10;
			this.textBox4.Text = "";
			// 
			// textBox5
			// 
			this.textBox5.Location = new System.Drawing.Point(128, 184);
			this.textBox5.Name = "textBox5";
			this.textBox5.ReadOnly = true;
			this.textBox5.TabIndex = 11;
			this.textBox5.Text = "";
			// 
			// textBox6
			// 
			this.textBox6.Location = new System.Drawing.Point(128, 224);
			this.textBox6.Multiline = true;
			this.textBox6.Name = "textBox6";
			this.textBox6.ReadOnly = true;
			this.textBox6.Size = new System.Drawing.Size(152, 64);
			this.textBox6.TabIndex = 12;
			this.textBox6.Text = "";
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(312, 373);
			this.Controls.Add(this.textBox6);
			this.Controls.Add(this.textBox5);
			this.Controls.Add(this.textBox4);
			this.Controls.Add(this.textBox3);
			this.Controls.Add(this.textBox2);
			this.Controls.Add(this.button1);
			this.Controls.Add(this.textBox1);
			this.Controls.Add(this.label6);
			this.Controls.Add(this.label5);
			this.Controls.Add(this.label4);
			this.Controls.Add(this.label3);
			this.Controls.Add(this.label2);
			this.Controls.Add(this.label1);
			this.Name = "Form1";
			this.Text = "Form1";
			this.Load += new System.EventHandler(this.Form1_Load);
			this.ResumeLayout(false);

		}
		#endregion

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

		private void Form1_Load(object sender, System.EventArgs e)
		{
		     // SqlConnection conn=new SqlConnection("Data Source=127.0.0.1;Integrated Security=sspi;Initial Catalog=northwind");
			//	conn.Open();	
			 conn=new SqlConnection("Data Source=127.0.0.1;Integrated Security=sspi;Initial Catalog=northwind");
			
			
			commstr="select * rom Employees where LastName=@LastName";
			
			
			comm=new SqlCommand(commstr,conn);
			//conn.Open();
			
			myParm=comm.Parameters.Add("@LastName",SqlDbType.NVarChar,15);

		}

		private void button1_Click(object sender, System.EventArgs e)
		{
			SqlConnection conn=new SqlConnection("Data Source=127.0.0.1;Integrated Security=sspi;Initial Catalog=northwind");
			
			
			commstr="select * rom Employees where LastName=@LastName";
			
			
			comm=new SqlCommand(commstr,conn);
			//conn.Open();
			
			myParm=comm.Parameters.Add("@LastName",SqlDbType.NVarChar,15);

			myParm.Value=textBox1.Text;
			comm.Connection.Open();
			myReader=comm.ExecuteReader(CommandBehavior.CloseConnection);
			while(myReader.Read())
			{
				this.textBox2.Text=myReader[4].ToString();
				this.textBox3.Text=myReader[2].ToString()+" "+myReader[1].ToString();
				this.textBox4.Text=myReader[3].ToString();
				this.textBox5.Text=myReader[5].ToString();
				this.textBox6.Text=myReader[7].ToString();
			}
			myReader.Close();

			
		}
	}
}