管理员查询学生.aspx.cs

本系统以ASP.NET为开发平台

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;

namespace 学生综合素质测评系统
{
	/// <summary>
	/// 查询学生 的摘要说明。
	/// </summary>
	public class 管理员查询学生 : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Button Button1;
		protected System.Web.UI.WebControls.Button Button2;
		protected System.Web.UI.WebControls.Button Button3;
		protected System.Web.UI.WebControls.Label Label2;
		protected System.Web.UI.WebControls.TextBox TextBox1;
		protected System.Web.UI.WebControls.Label Label1;
		protected System.Web.UI.WebControls.Label Label3;
		protected System.Web.UI.WebControls.HyperLink HyperLink1;
		protected System.Web.UI.WebControls.HyperLink HyperLink5;
		protected System.Web.UI.WebControls.HyperLink HyperLink2;
		protected System.Web.UI.WebControls.HyperLink HyperLink3;
		protected System.Web.UI.WebControls.HyperLink HyperLink4;
		protected System.Web.UI.WebControls.HyperLink HyperLink6;
		protected System.Web.UI.WebControls.HyperLink HyperLink7;
		protected System.Web.UI.WebControls.DataGrid DataGrid1;
	
		private void Page_Load(object sender, System.EventArgs e)
		{   this.Button1.Click +=new System.EventHandler(this.Button1_Click);
			this.Button2.Click +=new System.EventHandler(this.Button2_Click);
			this.Button3.Click +=new System.EventHandler(this.Button3_Click);
			this.Load += new System.EventHandler(this.Page_Load);
		}

		#region Web 窗体设计器生成的代码
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <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.Button1.Click += new System.EventHandler(this.Button1_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void Button1_Click(object sender, System.EventArgs e)
		{
			SqlConnection conn=new SqlConnection("Server=.;database=学生综合素质测评系统;user=sa;password=");
			conn.Open();
			string sql1="select 学号 from 学生 where 学号='"+TextBox1.Text+"'";
			SqlCommand mycom1=new SqlCommand(sql1,conn);
			SqlDataReader mydr1=mycom1.ExecuteReader();
			if (mydr1.Read()==true)
			{
				SqlConnection Conn1=new SqlConnection("Server=.;database=学生综合素质测评系统;user=sa;password=");
				Conn1.Open();
				
				string pppp="select z.专业名称,x.学院名称,b.班级名称,n.年级,s.姓名,s.密码,s.学号 from 学生 s join 专业 z on s.专业编号=z.专业编号 join 学院 x on s.学院编号=x.学院编号 join 班级 b on s.班级编号=b.班级编号 join 年级 n on s.年级编号=n.年级编号 where s.学号='"+TextBox1.Text+"'";	
				DataSet myds=new DataSet();
				SqlDataAdapter myda=new SqlDataAdapter(pppp,Conn1);
				myda.Fill(myds,"学生");
				DataGrid1.DataSource=myds;
				DataGrid1.DataBind();
			}
			else
				Label2.Text="该学号不存在！";
		}

		private void Button2_Click(object sender, System.EventArgs e)
		{
			TextBox1.Text="";
            Label2.Text="";
		}

		private void Button3_Click(object sender, System.EventArgs e)
		{
			SqlConnection conn=new SqlConnection("Server=.;database=学生综合素质测评系统;user=sa;password=");
			conn.Open();
			string sql1="select 学号 from 学生 where 学号='"+TextBox1.Text+"'";
			SqlCommand mycom1=new SqlCommand(sql1,conn);
			SqlDataReader mydr1=mycom1.ExecuteReader();
			if (mydr1.Read()==true)
			{
				SqlConnection Conn1=new SqlConnection("Server=.;database=学生综合素质测评系统;user=sa;password=");
				Conn1.Open();
				string pp="delete  from 学生 where 学号='"+TextBox1.Text+"'";
				SqlCommand mycom=new SqlCommand(pp,Conn1);
				SqlDataReader mydr=mycom.ExecuteReader();
				Label2.Text="删除成功！";
			}
		}

		private void TextBox2_TextChanged(object sender, System.EventArgs e)
		{
		
		}
	}

}