addnews.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;
using System.Configuration;

namespace ExamineSystem
{
	/// <summary>
	/// Summary description for AddNews.
	/// </summary>
	public class AddNews : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.TextBox NewsTitle;
		protected System.Web.UI.WebControls.TextBox NewsBody;
		protected System.Web.UI.WebControls.Button PreviewNews;
		protected System.Web.UI.WebControls.Button AddNew;
		protected System.Web.UI.HtmlControls.HtmlGenericControl title;
		

		private void Page_Load(object sender, System.EventArgs e)
		{
			///验证用户的权限
			if(Session["RoleID"] == null)
			{
				Response.Write("<script>alert(\"你还没有登录！！！\")</script>");
				Response.Redirect("~/Default.aspx");
			}
			if(UserDB.IsAdminUser(Int32.Parse(Session["RoleID"].ToString())) == false)
			{
				Response.Write("<script>alert(\"你无权访问！！！\")</script>");
				Response.Redirect("~/Default.aspx");
			}
									
		}

		private void AddNews_Click(object sender, System.EventArgs e)
		{
			if(NewsTitle.Text.Trim().Length > 0 && NewsBody.Text.Trim().Length > 0)
			{   ///构建数据库连接和添加新闻的SQL语句
				SqlConnection myConnection = new SqlConnection(DataBaseDB.ConnectionString);
				String cmdText = "INSERT INTO NEWS (Title,Body,Pubdate,UserID)VALUES('"
					+ NewsTitle.Text + "','" + NewsBody.Text + "',GetDate(),'" + Session["UserID"].ToString() + "')";
				SqlCommand myCommand = new SqlCommand(cmdText,myConnection);
				///打开数据库连接并执行添加操作
				myConnection.Open();
				myCommand.ExecuteNonQuery();
				myConnection.Close();
				///返回新闻管理页面
				Response.Redirect("~/Default.aspx");
			}
			else
			{
				Response.Write("<script>alert(\"新闻的标题不能为空！\")</script>");
			}
		}

		private void PreviewNews_Click(object sender, System.EventArgs e)
		{
			if(NewsTitle.Text.Trim().Length > 0)
			{
				///把需要预览的数据存放到Session中
				PreviewNewsDetails newsDetails = new PreviewNewsDetails();
				newsDetails.Title = NewsTitle.Text;
				newsDetails.Body  = NewsBody.Text;
				Session[Session.SessionID + "PreviewNews"] = newsDetails;
				///打开新的页面，实现预览功能
				Response.Write("<script>window.open('../ShowNews.aspx?Operation=preview');</script>");
			}
			else
			{
				Response.Write("<script>alert(\"新闻的标题不能为空！\")</script>");
			}
		}

		#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.PreviewNews.Click += new System.EventHandler(this.PreviewNews_Click);
			this.AddNew.Click += new System.EventHandler(this.AddNews_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion
	}
}