showexam.aspx.cs

试题库管理系统可按章节、题型对试题库进行排序并重新变更题号。添加题型库允许用户修改试题类型

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

namespace examonline
{
	public partial class showexam : System.Web.UI.Page
	{
	
		protected void Page_Load(object sender, System.EventArgs e)
		{
			if((bool)Session["IsLogined"]==false)
			{
				Response.Redirect("index.aspx");
			}

			if(!IsPostBack)
			{
				Bindgrid();
			}
		}
		private void Bindgrid()
		{
			string sql= "Select exam_id,exam_title,create_time from exam";
			SqlConnection cn =new SqlConnection("server=(local);uid=sa;pwd=51aspx;database=examonline");
			SqlDataAdapter da =new SqlDataAdapter(sql, cn);
			DataSet ds=new DataSet();
			try
			{
				cn.Open();
				da.Fill(ds, "word");
			}
			finally
			{
				cn.Close();
			}
			Dg.DataSource = ds;
			Dg.DataBind();
		}

		#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.Dg.ItemCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.Dg_DeleteCommand);

		}
		#endregion

		private void Dg_DeleteCommand(object sender, System.Web.UI.WebControls.DataGridCommandEventArgs e)
		{
			string theID="";
			theID = ((Label)e.Item.FindControl("lbId")).Text;
			SqlConnection cn =new SqlConnection("server=(local);uid=sa;pwd=51aspx;database=examonline");
			
			string sql1 = "delete from selectItems where exam_id=" + theID;
			string sql2 = "delete from fillblank where exam_id=" + theID;
			string sql3 = "delete from essay where exam_id=" + theID;
			SqlCommand cmd = new SqlCommand();
			cmd.Connection=cn;
			try
			{
				cn.Open();
				cmd.CommandText=sql1;
				cmd.ExecuteNonQuery();
				cmd.CommandText=sql2;
				cmd.ExecuteNonQuery();
				cmd.CommandText=sql3;
				cmd.ExecuteNonQuery();
			}
			catch(SqlException ex)
			{
				Response.Write("数据库错误：" + ex.Message.ToString());
			}
			finally
			{
				cn.Close();
			}

			string sql = "delete from exam where exam_id=" + theID;
			try
			{
				cn.Open();
				cmd.CommandText=sql;
				cmd.ExecuteNonQuery();
			}
			catch(SqlException ex)
			{
				Response.Write("数据库错误：" + ex.Message.ToString());
			}
			finally
			{
				cn.Close();
			}

			Bindgrid();
			}
	}
}