personalsearch.cs

这是用SQL数据库做的学生信息管理系统。简明

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

namespace 学生与成绩
{
	/// <summary>
	/// PersonalSearch 的摘要说明。
	/// </summary>
	public class PersonalSearch : System.Windows.Forms.Form
	{
		private DataSet ds=new DataSet();
		private string sendStrSQL;
		private string sendTableName="成绩表";
		private DataTable myTable;
		private LinkDataBase link=new LinkDataBase();
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.TextBox txtID;
		private System.Windows.Forms.Button btnSearch;
		private System.Windows.Forms.DataGrid dataGrid1;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		public PersonalSearch()
		{
			//
			// 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.txtID = new System.Windows.Forms.TextBox();
			this.btnSearch = new System.Windows.Forms.Button();
			this.dataGrid1 = new System.Windows.Forms.DataGrid();
			((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).BeginInit();
			this.SuspendLayout();
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(13, 14);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(56, 23);
			this.label1.TabIndex = 0;
			this.label1.Text = "输入学号";
			this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
			// 
			// txtID
			// 
			this.txtID.Location = new System.Drawing.Point(87, 16);
			this.txtID.Name = "txtID";
			this.txtID.TabIndex = 0;
			this.txtID.Text = "";
			// 
			// btnSearch
			// 
			this.btnSearch.Location = new System.Drawing.Point(205, 14);
			this.btnSearch.Name = "btnSearch";
			this.btnSearch.TabIndex = 2;
			this.btnSearch.Text = "查询";
			this.btnSearch.Click += new System.EventHandler(this.btnSearch_Click);
			// 
			// dataGrid1
			// 
			this.dataGrid1.DataMember = "";
			this.dataGrid1.HeaderForeColor = System.Drawing.SystemColors.ControlText;
			this.dataGrid1.Location = new System.Drawing.Point(14, 56);
			this.dataGrid1.Name = "dataGrid1";
			this.dataGrid1.ReadOnly = true;
			this.dataGrid1.Size = new System.Drawing.Size(264, 192);
			this.dataGrid1.TabIndex = 3;
			// 
			// PersonalSearch
			// 
			this.AcceptButton = this.btnSearch;
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(292, 266);
			this.Controls.Add(this.dataGrid1);
			this.Controls.Add(this.btnSearch);
			this.Controls.Add(this.txtID);
			this.Controls.Add(this.label1);
			this.Name = "PersonalSearch";
			this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
			this.Text = "个个人成绩";
			this.Load += new System.EventHandler(this.PersonalSearch_Load);
			((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).EndInit();
			this.ResumeLayout(false);

		}
		#endregion

		private void PersonalSearch_Load(object sender, System.EventArgs e)
		{
			this.dataGrid1.CaptionText="学生成绩查询";
			myTable=new DataTable();
			myTable.Columns.Add("名称",typeof(char));
			myTable.Columns.Add("成绩",typeof(int));
			this.dataGrid1.DataSource=myTable;
		}

		private void btnSearch_Click(object sender, System.EventArgs e)
		{
			if(this.txtID.Text=="")
			{
				MessageBox.Show("学号不能为空","提示");
				return;
			}
			this.sendStrSQL="select 课程表.名称,成绩表.成绩 from 成绩表 inner join 课程表 on 课程表.编号=成绩表.课程编号"
				+" where(成绩表.学号='"+txtID.Text.Trim()+"')";
			this.ds=link.SelectDataBase(sendStrSQL,sendTableName);
			this.dataGrid1.DataSource=ds;
			this.dataGrid1.DataMember="成绩表";
		}
	}
}