updatestu.cs

c#+SQL Server 中小型信息系统开发实例精选书上代码

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

namespace StudentManagementsystem
{
	/// <summary>
	/// UpdateStu 的摘要说明。
	/// </summary>
	public class UpdateStu : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Button QueryStuClass;
		private System.Windows.Forms.Button QryStuN;
		private System.Windows.Forms.DataGrid UpdStuGrdDg;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.TextBox QryStuName;
		private System.Windows.Forms.Button SaveChg;
		private System.Windows.Forms.Button ExitUpdStu;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		/// 
		private string UpdStustrconnName;
		private string UpdStustrconnClass;
		private SqlConnection UpdSconn;
		private string UpdStuconnstr="workstation id=localhost;Integrated Security=SSPI;database=StuMagSys";
		private SqlDataAdapter UpdStuGrdsqlda;
		private DataSet UpdClassStudset =new DataSet();
		private DataSet UpdNameStudset =new DataSet();
		private SqlCommandBuilder SqlComm;
		private string initStringSql="select Student_id as 学号,Student_name as 姓名,Sex as 性别,Birth as 出生年月,Nation as 民族,Class_id as 班级,Entrance_date as 入学时间,home as 家庭地址,politic as 政治面貌,ID as 身份证号,Job as 职位,specialty as 所学专业 from Student";
		private System.Windows.Forms.Button DelRecord;
		private System.Windows.Forms.ComboBox QryStuCla;
		private System.Windows.Forms.GroupBox groupBox1;
		private System.Windows.Forms.GroupBox groupBox2;

		private System.ComponentModel.Container components = null;

		public UpdateStu()
		{
			//
			// Windows 窗体设计器支持所必需的
			//
			InitializeComponent();



			this.UpdSconn=new SqlConnection(UpdStuconnstr);
			this.UpdStuGrdsqlda=new SqlDataAdapter(initStringSql,UpdSconn);
			this.UpdClassStudset.Clear();
			this.UpdNameStudset.Clear();
			this.UpdStuGrdsqlda.Fill(UpdClassStudset,"Student");
			this.UpdStuGrdDg.DataSource=UpdClassStudset.Tables[0];
			this.UpdStuGrdsqlda.Fill(UpdNameStudset,"Student");

			this.UpdateStu_Load();			
			//
			// 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.QueryStuClass = new System.Windows.Forms.Button();
			this.ExitUpdStu = new System.Windows.Forms.Button();
			this.QryStuN = new System.Windows.Forms.Button();
			this.UpdStuGrdDg = new System.Windows.Forms.DataGrid();
			this.label2 = new System.Windows.Forms.Label();
			this.label1 = new System.Windows.Forms.Label();
			this.QryStuName = new System.Windows.Forms.TextBox();
			this.SaveChg = new System.Windows.Forms.Button();
			this.DelRecord = new System.Windows.Forms.Button();
			this.QryStuCla = new System.Windows.Forms.ComboBox();
			this.groupBox1 = new System.Windows.Forms.GroupBox();
			this.groupBox2 = new System.Windows.Forms.GroupBox();
			((System.ComponentModel.ISupportInitialize)(this.UpdStuGrdDg)).BeginInit();
			this.SuspendLayout();
			// 
			// QueryStuClass
			// 
			this.QueryStuClass.Location = new System.Drawing.Point(392, 56);
			this.QueryStuClass.Name = "QueryStuClass";
			this.QueryStuClass.Size = new System.Drawing.Size(96, 24);
			this.QueryStuClass.TabIndex = 23;
			this.QueryStuClass.Text = "检索";
			this.QueryStuClass.Click += new System.EventHandler(this.QueryStuClass_Click);
			// 
			// ExitUpdStu
			// 
			this.ExitUpdStu.Location = new System.Drawing.Point(368, 384);
			this.ExitUpdStu.Name = "ExitUpdStu";
			this.ExitUpdStu.Size = new System.Drawing.Size(96, 24);
			this.ExitUpdStu.TabIndex = 22;
			this.ExitUpdStu.Text = "退出";
			this.ExitUpdStu.Click += new System.EventHandler(this.ExitUpdStu_Click);
			// 
			// QryStuN
			// 
			this.QryStuN.Location = new System.Drawing.Point(392, 24);
			this.QryStuN.Name = "QryStuN";
			this.QryStuN.Size = new System.Drawing.Size(96, 24);
			this.QryStuN.TabIndex = 21;
			this.QryStuN.Text = "检索";
			this.QryStuN.Click += new System.EventHandler(this.QryStuN_Click);
			// 
			// UpdStuGrdDg
			// 
			this.UpdStuGrdDg.DataMember = "";
			this.UpdStuGrdDg.HeaderForeColor = System.Drawing.SystemColors.ControlText;
			this.UpdStuGrdDg.Location = new System.Drawing.Point(60, 112);
			this.UpdStuGrdDg.Name = "UpdStuGrdDg";
			this.UpdStuGrdDg.Size = new System.Drawing.Size(520, 256);
			this.UpdStuGrdDg.TabIndex = 20;
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(120, 56);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(80, 16);
			this.label2.TabIndex = 19;
			this.label2.Text = "按班级检索：";
			// 
			// label1
			// 
			this.label1.Location = new System.Drawing.Point(120, 24);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(112, 16);
			this.label1.TabIndex = 17;
			this.label1.Text = "按学生姓名检索：";
			// 
			// QryStuName
			// 
			this.QryStuName.Location = new System.Drawing.Point(232, 24);
			this.QryStuName.Name = "QryStuName";
			this.QryStuName.Size = new System.Drawing.Size(144, 21);
			this.QryStuName.TabIndex = 16;
			this.QryStuName.Text = "";
			// 
			// SaveChg
			// 
			this.SaveChg.Location = new System.Drawing.Point(160, 384);
			this.SaveChg.Name = "SaveChg";
			this.SaveChg.Size = new System.Drawing.Size(96, 24);
			this.SaveChg.TabIndex = 25;
			this.SaveChg.Text = "保存修改";
			this.SaveChg.Click += new System.EventHandler(this.SaveChg_Click);
			// 
			// DelRecord
			// 
			this.DelRecord.Location = new System.Drawing.Point(264, 384);
			this.DelRecord.Name = "DelRecord";
			this.DelRecord.Size = new System.Drawing.Size(96, 24);
			this.DelRecord.TabIndex = 24;
			this.DelRecord.Text = "删除该记录";
			this.DelRecord.Click += new System.EventHandler(this.DelRecord_Click);
			// 
			// QryStuCla
			// 
			this.QryStuCla.Location = new System.Drawing.Point(232, 56);
			this.QryStuCla.Name = "QryStuCla";
			this.QryStuCla.Size = new System.Drawing.Size(144, 20);
			this.QryStuCla.TabIndex = 26;
			// 
			// groupBox1
			// 
			this.groupBox1.Location = new System.Drawing.Point(48, 8);
			this.groupBox1.Name = "groupBox1";
			this.groupBox1.Size = new System.Drawing.Size(544, 80);
			this.groupBox1.TabIndex = 27;
			this.groupBox1.TabStop = false;
			this.groupBox1.Text = "检索项";
			// 
			// groupBox2
			// 
			this.groupBox2.Location = new System.Drawing.Point(48, 88);
			this.groupBox2.Name = "groupBox2";
			this.groupBox2.Size = new System.Drawing.Size(544, 288);
			this.groupBox2.TabIndex = 28;
			this.groupBox2.TabStop = false;
			this.groupBox2.Text = "检索结果";
			// 
			// UpdateStu
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(640, 421);
			this.Controls.Add(this.QryStuCla);
			this.Controls.Add(this.SaveChg);
			this.Controls.Add(this.DelRecord);
			this.Controls.Add(this.QueryStuClass);
			this.Controls.Add(this.ExitUpdStu);
			this.Controls.Add(this.QryStuN);
			this.Controls.Add(this.UpdStuGrdDg);
			this.Controls.Add(this.label2);
			this.Controls.Add(this.label1);
			this.Controls.Add(this.QryStuName);
			this.Controls.Add(this.groupBox1);
			this.Controls.Add(this.groupBox2);
			this.Name = "UpdateStu";
			this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
			this.Text = "更新学生信息";
			((System.ComponentModel.ISupportInitialize)(this.UpdStuGrdDg)).EndInit();
			this.ResumeLayout(false);

		}
		#endregion

		//在数据库中检索班级名称并填充到班级列表
		private void UpdateStu_Load()
		{  

			DataSet UpdStudClaset=new DataSet();
			
			initStringSql="select Class_name from class";
			this.UpdSconn=new SqlConnection(this.UpdStuconnstr);
			this.UpdStuGrdsqlda=new SqlDataAdapter(this.initStringSql,this.UpdSconn);
			UpdStudClaset.Clear();
			this.UpdStuGrdsqlda.Fill(UpdStudClaset,"Class");
			for(int i=0;i<UpdStudClaset.Tables[0].Rows.Count;i++)
			{
				QryStuCla.Items.Add(UpdStudClaset.Tables[0].Rows[i][0]);
			}
			QryStuCla.SelectedIndex=0;
		}

		private void ExitUpdStu_Click(object sender, System.EventArgs e)
		{
			if(MessageBox.Show("您确认要退出本系统？","确认",MessageBoxButtons.YesNoCancel)==DialogResult.Yes)
				this.Close();
		}
		//根据学生姓名查询学生信息
		private void QryStuN_Click(object sender, System.EventArgs e)
		{
			try
			{
				UpdStustrconnName="select Student_id as 学号,Student_name as 姓名,Sex as 性别,Birth as 出生年月,Nation as 民族,Class_id as 班级,Entrance_date as 入学时间,home as 家庭地址,politic as 政治面貌,ID as 身份证号,Job as 职位,specialty as 所学专业 from student where student_name="+"'"+this.QryStuName.Text.ToString().Trim()+"'";
				UpdSconn=new SqlConnection(UpdStuconnstr);
				UpdStuGrdsqlda=new SqlDataAdapter(UpdStustrconnName,UpdSconn);
				UpdNameStudset.Clear();

				UpdStuGrdsqlda.Fill(UpdNameStudset,"student");
				UpdStuGrdDg.DataSource=UpdNameStudset.Tables[0];
			}
			catch
			{
				MessageBox.Show("查询失败。","确认");
			}
		}
		//根据学生班级查询学生信息
		private void QueryStuClass_Click(object sender, System.EventArgs e)
		{
			try
			{
				UpdStustrconnClass="select Student_id as 学号,Student_name as 姓名,Sex as 性别,Birth as 出生年月,Nation as 民族,student.Class_id as 班级,Entrance_date as 入学时间,home as 家庭地址,politic as 政治面貌,ID as 身份证号,Job as 职位,specialty as 所学专业 from student,class where class.class_id=student.class_id and class.Class_name="+"'"+this.QryStuCla.SelectedItem.ToString().Trim()+"'";
				UpdSconn=new SqlConnection(UpdStuconnstr);
				UpdStuGrdsqlda=new SqlDataAdapter(UpdStustrconnClass,UpdSconn);
				UpdClassStudset.Clear();

				UpdStuGrdsqlda.Fill(UpdClassStudset,"student");
				UpdStuGrdDg.DataSource=UpdClassStudset.Tables[0];
			}
			catch
			{
				MessageBox.Show("查询失败。","确认");
			}
		}
		//保存修改
		private void SaveChg_Click(object sender, System.EventArgs e)
		{
			try
			{	
				int row=this.UpdStuGrdDg.CurrentCell.RowNumber;
				this.UpdStuGrdDg.CurrentCell=new DataGridCell(row+1,0);
				if(UpdClassStudset.HasChanges())//如果改动是在根据学生班级检索的结果集上进行的那么，更改该结果集
				{
					UpdSconn=new SqlConnection(UpdStuconnstr);
					UpdStuGrdsqlda=new SqlDataAdapter(this.UpdStustrconnClass,this.UpdSconn);
					SqlComm=new SqlCommandBuilder(UpdStuGrdsqlda);

					this.UpdStuGrdsqlda.Update(this.UpdClassStudset.GetChanges(),"student");
					MessageBox.Show("保存修改成功!","信息");
				}
				else if(UpdNameStudset.HasChanges())//如果改动是在根据学生姓名检索的结果集上进行的那么，更改该结果集
				{
					UpdSconn=new SqlConnection(UpdStuconnstr);
					UpdStuGrdsqlda=new SqlDataAdapter(this.UpdStustrconnName,UpdSconn);
					SqlComm=new SqlCommandBuilder(UpdStuGrdsqlda);
					UpdStuGrdsqlda.Update(this.UpdNameStudset.GetChanges(),"student");
					MessageBox.Show("保存修改成功!","信息");
				}
			}
			catch(Exception ex)
			{
				MessageBox.Show(ex.ToString(),"信息");
			}
		}
		//删除学生记录
		private void DelRecord_Click(object sender, System.EventArgs e)
		{
			int rowNumber=this.UpdStuGrdDg.CurrentCell.RowNumber;
			try
			{
				this.UpdClassStudset.Tables[0].Rows[rowNumber].Delete();
				this.UpdNameStudset.Tables[0].Rows[rowNumber].Delete();
				UpdSconn=new SqlConnection(UpdStuconnstr);
				UpdStuGrdsqlda=new SqlDataAdapter("",UpdSconn);
				SqlComm=new SqlCommandBuilder(UpdStuGrdsqlda);
				UpdStuGrdsqlda.Update(this.UpdNameStudset.GetChanges(),"student");
				UpdStuGrdsqlda.Update(this.UpdClassStudset.GetChanges(),"student");
				MessageBox.Show("删除成功!","信息");
			}
			catch(Exception ex)
			{
				MessageBox.Show(ex.ToString(),"信息");		
				
			}
		}
	}
}