browsespecialty.cs

C#编写的学籍管理系统

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

namespace WindowsApplication1
{
	/// <summary>
	/// zyll 的摘要说明。
	/// </summary>
	public class BrowseSpecialty : System.Windows.Forms.Form
	{
		private System.Data.OleDb.OleDbConnection oleDbConnection1;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.Button button2;
		private System.Windows.Forms.DataGrid dataGrid1;
		private System.Windows.Forms.Button button3;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		public BrowseSpecialty()
		{
			//
			// 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.oleDbConnection1 = new System.Data.OleDb.OleDbConnection();
			this.button1 = new System.Windows.Forms.Button();
			this.button2 = new System.Windows.Forms.Button();
			this.dataGrid1 = new System.Windows.Forms.DataGrid();
			this.button3 = new System.Windows.Forms.Button();
			((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).BeginInit();
			this.SuspendLayout();
			// 
			// oleDbConnection1
			// 
			this.oleDbConnection1.ConnectionString = "Data Source=xsxxdb.mdb;Jet OLEDB:Engine Type=5;Provider=Microsoft.Jet." +
				"OLEDB.4.0;";
			// 
			// button1
			// 
			this.button1.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.button1.ForeColor = System.Drawing.SystemColors.ControlText;
			this.button1.Location = new System.Drawing.Point(405, 319);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(86, 31);
			this.button1.TabIndex = 2;
			this.button1.Text = "退出";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// button2
			// 
			this.button2.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.button2.ForeColor = System.Drawing.SystemColors.ControlText;
			this.button2.Location = new System.Drawing.Point(75, 319);
			this.button2.Name = "button2";
			this.button2.Size = new System.Drawing.Size(85, 31);
			this.button2.TabIndex = 3;
			this.button2.Text = "修改";
			this.button2.Click += new System.EventHandler(this.button2_Click);
			// 
			// dataGrid1
			// 
			this.dataGrid1.AllowSorting = false;
			this.dataGrid1.BackgroundColor = System.Drawing.SystemColors.Control;
			this.dataGrid1.CaptionVisible = false;
			this.dataGrid1.DataMember = "";
			this.dataGrid1.HeaderForeColor = System.Drawing.SystemColors.ControlText;
			this.dataGrid1.Location = new System.Drawing.Point(11, 21);
			this.dataGrid1.Name = "dataGrid1";
			this.dataGrid1.PreferredColumnWidth = 110;
			this.dataGrid1.PreferredRowHeight = 30;
			this.dataGrid1.ReadOnly = true;
			this.dataGrid1.Size = new System.Drawing.Size(512, 288);
			this.dataGrid1.TabIndex = 4;
			// 
			// button3
			// 
			this.button3.Font = new System.Drawing.Font("宋体", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.button3.ForeColor = System.Drawing.SystemColors.ControlText;
			this.button3.Location = new System.Drawing.Point(235, 319);
			this.button3.Name = "button3";
			this.button3.Size = new System.Drawing.Size(85, 31);
			this.button3.TabIndex = 5;
			this.button3.Text = "删除";
			this.button3.Click += new System.EventHandler(this.button3_Click);
			// 
			// BrowseSpecialty
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(8, 18);
			this.ClientSize = new System.Drawing.Size(533, 356);
			this.Controls.Add(this.button3);
			this.Controls.Add(this.dataGrid1);
			this.Controls.Add(this.button2);
			this.Controls.Add(this.button1);
			this.Name = "BrowseSpecialty";
			this.Text = "专业信息浏览";
			this.Load += new System.EventHandler(this.BrowseSpecialtyl_Load);
			this.Closed += new System.EventHandler(this.BrowseSpecialty_Closed);
			((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).EndInit();
			this.ResumeLayout(false);

		}
		#endregion
        DataSet ds;


		private void button1_Click(object sender, System.EventArgs e)
		{
			this.Close();
		}
        public ModifySpecialty modifyspecialty;
		private void button2_Click(object sender, System.EventArgs e)
		{
			if (dataGrid1[dataGrid1.CurrentCell]!=null)
			{
				modifyspecialty=new ModifySpecialty();
				modifyspecialty.Tag=ds.Tables[0].Rows[dataGrid1.CurrentRowIndex][0].ToString().Trim();
				modifyspecialty.textBox1.Text=ds.Tables[0].Rows[dataGrid1.CurrentRowIndex][1].ToString().Trim();
				modifyspecialty.textBox2.Text=ds.Tables[0].Rows[dataGrid1.CurrentRowIndex][2].ToString().Trim();
				modifyspecialty.ShowDialog();
			}
		}

		private void dataGrid1_CurrentCellChanged(object sender, System.EventArgs e)
		{
				dataGrid1.CaptionText=dataGrid1[dataGrid1.CurrentRowIndex,1].ToString();

		}

		private void BrowseSpecialty_Closed(object sender, System.EventArgs e)
		{
			if(modifyspecialty!=null)
				modifyspecialty.Close();
			oleDbConnection1.Close();
		}

		private void button3_Click(object sender, System.EventArgs e)
		{
			if (dataGrid1[dataGrid1.CurrentCell]!=null)
			{
				string sql="select specialtyname from specialtyinfo where specialtyid="+ds.Tables["specialty"].Rows[dataGrid1.CurrentCell.RowNumber][0].ToString().Trim()+" and specialtyid not in (select distinct specialtyinfo.specialtyid from classinfo inner join specialtyinfo on classinfo.specialtyname=specialtyinfo.specialtyname)";
				OleDbCommand cmd=new OleDbCommand(sql,oleDbConnection1);
				OleDbDataReader dr;
				dr=cmd.ExecuteReader();
				if (!dr.Read())
				{
					MessageBox.Show("删除专业'"+ds.Tables["specialty"].Rows[dataGrid1.CurrentCell.RowNumber][1].ToString().Trim()+"'失败，请先删除与此专业相关的班级","提示");
					dr.Close();
				}
				else
				{
					dr.Close();
					sql="delete * from specialtyinfo where specialtyname not in (select distinct specialtyname from classinfo) and specialtyid="+ds.Tables["specialty"].Rows[dataGrid1.CurrentCell.RowNumber][0].ToString().Trim();
					
					cmd.CommandText=sql;
					cmd.ExecuteNonQuery();
					MessageBox.Show("删除专业'"+ds.Tables["specialty"].Rows[dataGrid1.CurrentCell.RowNumber][1].ToString().Trim()+"'成功","提示");
				}
			}
		}

		private void BrowseSpecialtyl_Load(object sender, System.EventArgs e)
		{
	
				oleDbConnection1.Open();
				string sql="select specialtyid as 编号,specialtyname as 专业名称,remark as 专业描述 from specialtyinfo";
				OleDbDataAdapter adp=new OleDbDataAdapter(sql,oleDbConnection1);
				ds=new DataSet();
				adp.Fill(ds,"specialty");
				dataGrid1.DataSource=ds.Tables[0].DefaultView;
		  
	
		}


	}
}