deleteanswer.aspx.cs

用ASP.NET（C#）、SQL Server2000数据库开发在线考试系统源代码

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 ExamineSystem
{
	/// <summary>
	/// Summary description for DeleteAnswer.
	/// </summary>
	public class DeleteAnswer : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Label QuestionTitle;
		protected System.Web.UI.WebControls.TextBox AnswerOne;
		protected System.Web.UI.WebControls.TextBox AnswerTwo;
		protected System.Web.UI.WebControls.TextBox AnswerThree;
		protected System.Web.UI.WebControls.TextBox AnswerFour;
		protected System.Web.UI.WebControls.Button UpdateAnswer;
		protected System.Web.UI.HtmlControls.HtmlGenericControl title;
	
		private int nQuestionID = 0;

		private void Page_Load(object sender, System.EventArgs e)
		{
			///验证用户的权限
			if(Session["UserID"] == null)
			{
				Response.Redirect("~/Default.aspx");
			}
			

			if(Request.Params["QuestionID"] != null)
			{
				nQuestionID = Int32.Parse(Request.Params["QuestionID"].ToString());
			}
			if(!Page.IsPostBack)
			{
				if(nQuestionID > 0)
				{
					BindAnswerData(nQuestionID);
				}
			}
		}

		private void BindAnswerData(int nQuestionID)
		{
			QuestionDB question = new QuestionDB();
			SqlDataReader recq = question.GetSingleQuestion(nQuestionID);
			while(recq.Read())
			{
				QuestionTitle.Text = recq["Title"].ToString();
			}
			recq.Close();

			AnswerDB answer = new AnswerDB();
			SqlDataReader reca = answer.GetAnswers(nQuestionID);

			int i = 1;
			while(reca.Read())
			{
				QuestionTitle.Text = reca["QuestionTitle"].ToString();
				TextBox answerText = null;
				switch(i)
				{
					case 1:
					{
						answerText = (TextBox)FindControl("AnswerOne");
						break;
					}
					case 2:
					{
						answerText = (TextBox)FindControl("AnswerTwo");
						break;
					}
					case 3:
					{
						answerText = (TextBox)FindControl("AnswerThree");
						break;
					}
					case 4:
					{
						answerText = (TextBox)FindControl("AnswerFour");
						break;
					}
					default:break;						
				}
				if(answerText != null)
				{
					answerText.Text = reca["Body"].ToString();
				}
				i++;
			}
			reca.Close();
		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: This call is required by the ASP.NET Web Form Designer.
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{    
			this.UpdateAnswer.Click += new System.EventHandler(this.UpdateAnswer_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void UpdateAnswer_Click(object sender, System.EventArgs e)
		{
			AnswerDB answer = new AnswerDB();
			answer.DeleteAnswerByQuestion(nQuestionID);

			Response.Write("<script>alert(\"删除问题答案成功！！！\")</script>");
		}
	}
}