studentsform.cs

一个很不错的学生成绩管理系统

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

namespace StudentsManager
{
	/// <summary>
	/// StudentsForm 的摘要说明。
	/// </summary>
	public class StudentsForm : System.Windows.Forms.Form
	{
		private System.Data.SqlClient.SqlConnection sqlConnection1;
		private System.Data.SqlClient.SqlCommand sqlCommand1;
		private System.Windows.Forms.TextBox textBox1;
		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 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.Button button1;
		private System.Windows.Forms.Button button2;
		private System.Windows.Forms.Button button3;
		private System.Windows.Forms.Button button4;

		private System.Data.SqlClient.SqlDataReader sqlReader1;
		private System.Windows.Forms.Button button5;
		private System.Windows.Forms.Button button6;
		private System.Windows.Forms.Button button7;
		private System.Windows.Forms.Button button8;

		public long Count=0,Counter;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		public StudentsForm()
		{
			//
			// 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 Form Designer generated code
		/// <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.sqlConnection1 = new System.Data.SqlClient.SqlConnection();
			this.sqlCommand1 = new System.Data.SqlClient.SqlCommand();
			this.textBox1 = new System.Windows.Forms.TextBox();
			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.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.button1 = new System.Windows.Forms.Button();
			this.button2 = new System.Windows.Forms.Button();
			this.button3 = new System.Windows.Forms.Button();
			this.button4 = new System.Windows.Forms.Button();
			this.button5 = new System.Windows.Forms.Button();
			this.button6 = new System.Windows.Forms.Button();
			this.button7 = new System.Windows.Forms.Button();
			this.button8 = new System.Windows.Forms.Button();
			this.SuspendLayout();
			// 
			// sqlConnection1
			// 
			this.sqlConnection1.ConnectionString = "data source=COMPUTER-142;initial catalog=master;integrated security=SSPI;persist " +
				"security info=False;workstation id=COMPUTER-142;packet size=4096";
			// 
			// sqlCommand1
			// 
			this.sqlCommand1.CommandText = "SELECT * FROM Students";
			this.sqlCommand1.Connection = this.sqlConnection1;
			// 
			// textBox1
			// 
			this.textBox1.Location = new System.Drawing.Point(80, 88);
			this.textBox1.Name = "textBox1";
			this.textBox1.Size = new System.Drawing.Size(104, 21);
			this.textBox1.TabIndex = 0;
			this.textBox1.Text = "textBox1";
			// 
			// textBox2
			// 
			this.textBox2.Location = new System.Drawing.Point(312, 88);
			this.textBox2.Name = "textBox2";
			this.textBox2.Size = new System.Drawing.Size(104, 21);
			this.textBox2.TabIndex = 1;
			this.textBox2.Text = "textBox2";
			// 
			// textBox3
			// 
			this.textBox3.Location = new System.Drawing.Point(80, 128);
			this.textBox3.Name = "textBox3";
			this.textBox3.Size = new System.Drawing.Size(104, 21);
			this.textBox3.TabIndex = 2;
			this.textBox3.Text = "textBox3";
			// 
			// textBox4
			// 
			this.textBox4.Location = new System.Drawing.Point(312, 128);
			this.textBox4.Name = "textBox4";
			this.textBox4.Size = new System.Drawing.Size(104, 21);
			this.textBox4.TabIndex = 3;
			this.textBox4.Text = "textBox4";
			// 
			// textBox5
			// 
			this.textBox5.Location = new System.Drawing.Point(80, 168);
			this.textBox5.Name = "textBox5";
			this.textBox5.Size = new System.Drawing.Size(104, 21);
			this.textBox5.TabIndex = 4;
			this.textBox5.Text = "textBox5";
			// 
			// textBox6
			// 
			this.textBox6.Location = new System.Drawing.Point(312, 168);
			this.textBox6.Name = "textBox6";
			this.textBox6.Size = new System.Drawing.Size(104, 21);
			this.textBox6.TabIndex = 5;
			this.textBox6.Text = "textBox6";
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(16, 88);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(48, 24);
			this.label1.TabIndex = 6;
			this.label1.Text = "姓名";
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(232, 88);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(48, 24);
			this.label2.TabIndex = 7;
			this.label2.Text = "学号";
			// 
			// label3
			// 
			this.label3.Location = new System.Drawing.Point(16, 128);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(48, 24);
			this.label3.TabIndex = 8;
			this.label3.Text = "性别";
			// 
			// label4
			// 
			this.label4.Location = new System.Drawing.Point(232, 128);
			this.label4.Name = "label4";
			this.label4.Size = new System.Drawing.Size(48, 24);
			this.label4.TabIndex = 9;
			this.label4.Text = "民族";
			// 
			// label5
			// 
			this.label5.Location = new System.Drawing.Point(16, 168);
			this.label5.Name = "label5";
			this.label5.Size = new System.Drawing.Size(48, 24);
			this.label5.TabIndex = 10;
			this.label5.Text = "学院";
			// 
			// label6
			// 
			this.label6.Location = new System.Drawing.Point(232, 168);
			this.label6.Name = "label6";
			this.label6.Size = new System.Drawing.Size(48, 24);
			this.label6.TabIndex = 11;
			this.label6.Text = "专业";
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(56, 232);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(56, 24);
			this.button1.TabIndex = 12;
			this.button1.Text = "《";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// button2
			// 
			this.button2.Location = new System.Drawing.Point(144, 232);
			this.button2.Name = "button2";
			this.button2.Size = new System.Drawing.Size(56, 24);
			this.button2.TabIndex = 13;
			this.button2.Text = "〈";
			this.button2.Click += new System.EventHandler(this.button2_Click);
			// 
			// button3
			// 
			this.button3.Location = new System.Drawing.Point(232, 232);
			this.button3.Name = "button3";
			this.button3.Size = new System.Drawing.Size(56, 24);
			this.button3.TabIndex = 14;
			this.button3.Text = "〉";
			this.button3.Click += new System.EventHandler(this.button3_Click);
			// 
			// button4
			// 
			this.button4.Location = new System.Drawing.Point(328, 232);
			this.button4.Name = "button4";
			this.button4.Size = new System.Drawing.Size(56, 24);
			this.button4.TabIndex = 15;
			this.button4.Text = "》";
			this.button4.Click += new System.EventHandler(this.button4_Click);
			// 
			// button5
			// 
			this.button5.Location = new System.Drawing.Point(56, 272);
			this.button5.Name = "button5";
			this.button5.Size = new System.Drawing.Size(56, 24);
			this.button5.TabIndex = 16;
			this.button5.Text = "添加";
			this.button5.Click += new System.EventHandler(this.button5_Click);
			// 
			// button6
			// 
			this.button6.Location = new System.Drawing.Point(144, 272);
			this.button6.Name = "button6";
			this.button6.Size = new System.Drawing.Size(56, 24);
			this.button6.TabIndex = 17;
			this.button6.Text = "删除";
			this.button6.Click += new System.EventHandler(this.button6_Click);
			// 
			// button7
			// 
			this.button7.Location = new System.Drawing.Point(232, 272);
			this.button7.Name = "button7";
			this.button7.Size = new System.Drawing.Size(56, 24);
			this.button7.TabIndex = 18;
			this.button7.Text = "修改";
			// 
			// button8
			// 
			this.button8.Location = new System.Drawing.Point(328, 272);
			this.button8.Name = "button8";
			this.button8.Size = new System.Drawing.Size(56, 24);
			this.button8.TabIndex = 19;
			this.button8.Text = "查询";
			this.button8.Click += new System.EventHandler(this.button8_Click);
			// 
			// StudentsForm
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(472, 325);
			this.Controls.AddRange(new System.Windows.Forms.Control[] {
																		  this.button8,
																		  this.button7,
																		  this.button6,
																		  this.button5,
																		  this.button4,
																		  this.button3,
																		  this.button2,
																		  this.button1,
																		  this.label6,
																		  this.label5,
																		  this.label4,
																		  this.label3,
																		  this.label2,
																		  this.label1,
																		  this.textBox6,
																		  this.textBox5,
																		  this.textBox4,
																		  this.textBox3,
																		  this.textBox2,
																		  this.textBox1});
			this.Name = "StudentsForm";
			this.Text = "StudentsForm";
			this.Closing += new System.ComponentModel.CancelEventHandler(this.StudentsForm_Closing);
			this.Load += new System.EventHandler(this.StudentsForm_Load);
			this.ResumeLayout(false);

		}
		#endregion

		public bool Read()
		{
			if(sqlReader1.Read())
			{
				textBox1.Text=sqlReader1.GetString(1);
				textBox2.Text=sqlReader1.GetString(0);
				textBox3.Text=sqlReader1.GetString(2);
				textBox4.Text=sqlReader1.GetString(3);
				textBox5.Text=sqlReader1.GetString(4);
				textBox6.Text=sqlReader1.GetString(5);
				return true;
			}
			else 
				return false;
		}

		private void StudentsForm_Load(object sender, System.EventArgs e)
		{
			sqlConnection1.Open();
			sqlReader1=sqlCommand1.ExecuteReader();
			while(Read())
			{
				Count++;
			}
			while(sqlReader1.Read());
			sqlReader1.Close();
			sqlReader1=sqlCommand1.ExecuteReader();
			Read();
		}

		private void StudentsForm_Closing(object sender, System.ComponentModel.CancelEventArgs e)
		{
			sqlReader1.Close();
			sqlConnection1.Close();
		}

		private void button3_Click(object sender, System.EventArgs e)
		{
			if(!Read())
			{
				sqlReader1.Close();
				sqlCommand1.CommandText="SELECT * FROM Students";
				sqlReader1=sqlCommand1.ExecuteReader();
				Read();
			}
		}

		private void button1_Click(object sender, System.EventArgs e)
		{
			while(sqlReader1.Read());
			sqlReader1.Close();
			sqlCommand1.CommandText="SELECT * FROM Students";
			sqlReader1=sqlCommand1.ExecuteReader();
			Read();
		}

		private void button4_Click(object sender, System.EventArgs e)
		{
			while(Read());
		}

		private void button5_Click(object sender, System.EventArgs e)
		{
			AddForm addFrm=new AddForm();
			addFrm.ShowDialog();
		}

		private void button8_Click(object sender, System.EventArgs e)
		{
			QueryForm queryFrm=new QueryForm();
			queryFrm.ShowDialog();
		}

		private void button2_Click(object sender, System.EventArgs e)
		{
			Counter=Count;
			while(Counter!=0)
			{
				if(!Read())
				{
					sqlReader1.Close();
					sqlCommand1.CommandText="SELECT * FROM Students";
					sqlReader1=sqlCommand1.ExecuteReader();
					Read();
				}
				Counter--;
			}
		}

		private void button6_Click(object sender, System.EventArgs e)
		{
			sqlReader1.Close();
			sqlCommand1.CommandText="DELETE FROM Students WHERE 学号=@学号";
			sqlCommand1.Parameters.Add("@学号",SqlDbType.Char,10);
			sqlCommand1.Parameters["@学号"].Value=textBox2.Text.ToString();
			sqlCommand1.ExecuteNonQuery();
		}
	}
}