st_exam.aspx.cs

asp.net+sql2000经典项目开发案例

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;

namespace STGROUP.ST_WebExam.ST_User
{
	/// <summary>
	/// ST_Exam 的摘要说明。
	/// </summary>
	public partial class ST_Exam : System.Web.UI.Page
	{
		protected void Page_Load(object sender, System.EventArgs e)
		{
			// 在此处放置用户代码以初始化页面
			Response.Cache.SetCacheability(HttpCacheability.NoCache);//去掉页面缓存
			if(!IsPostBack)
			{
				bool flag = ST_DdlBind();
				if(flag)
					ST_DgBind();
			}
		}
		/// <summary>
		/// 绑定科目信息
		/// </summary>
		public bool ST_DdlBind()
		{
			ST_ExamBiz.ST_Course st_course = new STGROUP.ST_ExamBiz.ST_Course();
			DataSet ds = st_course.ST_GetAllCourseInfo();
			if(ds!=null && ds.Tables.Count>0 && ds.Tables[0].Rows.Count>0)
			{
				ddlCourse.DataSource = ds;
				ddlCourse.DataBind();
				return true;
			}
			else
			{
				Response.Write("<script language='javascript'>alert('请先添加科目信息！');window.location='ST_Course.aspx'</script>");
				Response.End();
				return false;
			}
		}

		/// <summary>
		/// 绑定问题
		/// </summary>
		public void ST_DgBind()
		{
			dgBulletin.Visible = true;
			ST_ExamBiz.ST_Question st_Question = new STGROUP.ST_ExamBiz.ST_Question();
			DataSet ds = st_Question.ST_GetTenQuestionInfo(int.Parse(ddlCourse.SelectedValue));
			if(ds!=null && ds.Tables.Count>0 && ds.Tables[0].Rows.Count>0)
			{
				dgBulletin.DataSource = ds;
				dgBulletin.DataBind();
			}
			else
			{
				dgBulletin.Visible = false;
			}
		}

		#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.dgBulletin.ItemDataBound += new System.Web.UI.WebControls.DataGridItemEventHandler(this.dgBulletin_ItemDataBound);

		}
		#endregion

		protected void btnOK_Click(object sender, System.EventArgs e)
		{
			//根据用户的选择判断如何显示
            foreach(DataGridItem dg in dgBulletin.Items)
			{
				RadioButtonList rblTemp = (RadioButtonList)dg.FindControl("rblAnswer");
				Label lblTmp = (Label)dg.FindControl("lblRight2");
				Label lblTemp = (Label)dg.FindControl("lblRight");
				Label lblTemp2 = (Label)dg.FindControl("lblOK");
				
				lblTemp.Visible = false;
				lblTemp2.Visible = false;

				if(rblTemp.SelectedValue != lblTmp.Text)
				{
					lblTemp.Visible = true;
				}
				else
				{
					lblTemp2.Visible = true;
				}
				
			}
		}

		protected void ddlCourse_SelectedIndexChanged(object sender, System.EventArgs e)
		{
			//科目变化时重新生成试题
            ST_DgBind();
		}

		private void dgBulletin_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
		{
            //根据带有四个备选答案的RadioButtonList
            if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
			{
				DataRowView drv = (DataRowView)e.Item.DataItem;
				RadioButtonList rblTemp = (RadioButtonList)e.Item.FindControl("rblAnswer");
				rblTemp.Items.Add(new ListItem(drv["ST_Answer1"].ToString(),"A"));
				rblTemp.Items.Add(new ListItem(drv["ST_Answer2"].ToString(),"B"));
				rblTemp.Items.Add(new ListItem(drv["ST_Answer3"].ToString(),"C"));
				rblTemp.Items.Add(new ListItem(drv["ST_Answer4"].ToString(),"D"));
			}
		}
	}
}