pagebase.cs

专业的办公oa代码下载 c#语言编写 三层结构

using System;
using System.Web;
using System.Web.UI;
using System.Web.SessionState; 
using System.Diagnostics;

using qminoa.Common;
using qminoa.Common.Data;
using qminoa.DA;

namespace qminoa.Webs
{
	/// <summary>
	/// 页面基类
	/// </summary>
	public class PageBase : System.Web.UI.Page
	{
	#region 构造函数
		/// <summary>
		/// 空构造函数
		/// </summary>
		public PageBase()
		{
		}
	#endregion

	#region 属性

		/// <summary>
		/// 登录ID
		/// </summary>
		//	public string Loginid = "";

		/// <summary>
		/// 员工号：唯一标识当前用户
		/// </summary>
		public string Empid = "-1";

		/// <summary>
		/// 当前员工姓名
		/// </summary>
		public string EmpName="";

		/// <summary>
		/// 功能名称
		/// </summary>
		public string FunName="";

		/// <summary>
		/// 窗体功能代码
		/// </summary>
		public string FunctionName
		{
			get
			{
				return GetViewState("FunctionName"); 
			}
			set
			{
				SetViewState("FunctionName",value); 
			}
		}

		/// <summary>
		/// 权限代码
		/// </summary>
		public int EmpRightCode
		{
			get
			{
				try
				{
					return CheckAuth(); 
				}
				catch(NullReferenceException)
				{
					return -1;
				}
			}
		}
	#endregion

	#region 方法

		/// <summary>
		/// 从ViewState中获取某个属性的值。如果该属性不存在，返回空字符串。
		/// </summary>
		/// <param name="PropertyName">属性名称</param>
		/// <returns>属性值（属性不存在时返回空字符串）</returns>
		public string GetViewState(string PropertyName)
		{
			try
			{
				return ViewState[PropertyName].ToString()  ;
			}
			catch(NullReferenceException)
			{
				return "";
			}
		}

		/// <summary>
		/// 设置ViewState中某个属性的值
		/// </summary>
		/// <param name="PropertyName">属性名称</param>
		/// <param name="PropertyValue">属性值</param>
		public void SetViewState(string PropertyName, string PropertyValue)
		{
			ViewState[PropertyName]=PropertyValue;
		}

		/// <summary>
		/// 权限检验函数
		/// </summary>
		/// <returns>int</returns>
		public int CheckAuth()
		{
			int _empid = Convert.ToInt16(this.Empid);
			string _funcname = this.FunName;
			CheckEmpRight myCheckAuth_DA = new CheckEmpRight();
			return myCheckAuth_DA.GetEmpRight(_empid,_funcname);
		}

		/// <summary>
		/// 给定模块名称，权限检验函数
		/// </summary>
		/// <returns>int</returns>
		public int CheckAuth(string funcname)
		{
			int _empid = Convert.ToInt16(this.Empid);
			CheckEmpRight myCheckAuth_DA = new CheckEmpRight();
			return myCheckAuth_DA.GetEmpRight(_empid,funcname);
		}

		/// <summary>
		/// 页面初始函数
		/// </summary>
		/// <param name="fName">模块名称</param>
		/// <param name="isChecked">是否验证</param>
		public void PageBegin(string fName,bool isChecked)
		{
			//--------------------------------------------
			//设定页面入口的模块名称。没有为空。
			//如果本页不定义，一定要从前一页确定。
			if (ValidateUtil.isBlank(fName))
			{
				this.FunctionName=this.GetParaValue("FunctionName");  
				this.FunName =this.FunctionName; 
			}
			else
			{
				this.FunName =fName ;
				this.FunctionName =fName;
			}
		
			//---------------------------------------------
			//读取当前用户
			//第一步：获取用户唯一标识Empid
			this.Empid=this.GetParaValue("EmpID"); 
			this.EmpName =this.GetParaValue("username"); 
			//		this.Loginid=this.GetParaValue("LoginID"); 

			//如果Empid为空，表示没有当前用户，则跳转至登录页面。
			if (ValidateUtil.isBlank(this.Empid)) 
			{
				Response.Redirect(Application["vRoot"]+"/login.aspx");  
			}

			//-----------------------------------------------------
			//第二步：判断是否具有本页访问权限
			if (isChecked && this.CheckAuth() == -1)
			{
				Response.Redirect(Application["vRoot"]+"/login.aspx");  
			}
		}

		/// <summary>
		/// 记录操作日志
		/// </summary>
		/// <param name="operation">操作描述</param>
		public void WriteOptLog(string operation)
		{
			//创建登录信息数据结构
			LogData mylogdata = new LogData();
			//调用数据访问层操作日志服务
			LogDB LogDataAccess = new LogDB();

			//填写操作日志信息
			mylogdata.OperatorID = this.Empid;
			mylogdata.OperatorName = this.EmpName;
			mylogdata.OperateTime = DateTime.Now.ToString();
			mylogdata.FuncName = this.FunName;
			mylogdata.OperationDescription = operation;

			//记录操作日志
			LogDataAccess.WriteOperationLog(mylogdata);
		}

		/// <summary>
		/// 获取页面参数的值
		/// </summary>
		/// <param name="oSession">Page.Session</param>
		/// <param name="oRequest">Page.Request</param>
		/// <param name="paraName">参数名称</param>
		/// <returns>参数值，字符串形式</returns>
		public string GetParaValue(HttpSessionState oSession, HttpRequest oRequest,string paraName)
		{
			string strValue="";
		
			//如果Session中能够找到相应的参数值，则返回参数值
			try
			{
				strValue=oSession[paraName].ToString();
			}
			catch(NullReferenceException)
			{
				strValue="";
			}
			//如果Session中不存在，从Request中寻找。
			if (ValidateUtil.isBlank(strValue))
			{
				try
				{
					strValue=oRequest[paraName].ToString();
				}
				catch(NullReferenceException)
				{
					strValue="";
				}
				//均为空时，返回空字符串。
				if (ValidateUtil.isBlank(strValue))
					strValue="";
			}

			return strValue;
		}

		/// <summary>
		/// 获取页面参数的值
		/// </summary>
		/// <param name="paraName">参数名称</param>
		/// <returns>参数值，字符串形式</returns>
		public string GetParaValue(string paraName)
		{
			return GetParaValue(Session,Request,paraName); 
		}
	#endregion

	#region 事件处理
		protected override void OnInit(EventArgs e)
		{
			base.OnInit(e);
			this.Load += new System.EventHandler(this.PageBase_Load);
			this.Error += new System.EventHandler(this.PageBase_Error);
		}

		protected void LogEvent(string message, EventLogEntryType entryType)
		{
			//EventLog提供与Windows事件日志的交互
			//如果事件源hotop100没有在计算机中注册，则创建事件源
			if (!EventLog.SourceExists("hotop100"))
			{
				EventLog.CreateEventSource("hotop100", "Application");
			}
			//将错误日志信息写入Windows事件日志中
			EventLog.WriteEntry("hotop100", message, entryType);
		}
		
		protected void PageBase_Error(object sender, System.EventArgs e)
		{
			string errMsg;
			//得到系统上一个异常
			Exception currentError = Server.GetLastError();

			errMsg = "<link rel=\"stylesheet\" href=\"/default.css\">";
			errMsg += "<h1>页面错误</h1><hr/>此页面发现一个意外错，对此我们非常抱歉。"+
				"此错误消息已信息了系统管理员，请及时联系我们，我们会及时解决此问题！ <br/>" +
				"错误发生位置： "+Request.Url.ToString()+"<br/>"+
				"错误消息： <font class=\"ErrorMessage\">"+ currentError.Message.ToString() + "</font><hr/>"+
				"<b>Stack Trace:</b><br/>"+
				currentError.ToString();
			//如果发生致命应用程序错误
			if ( !(currentError is ApplicationException) )
			{
				//向Windows事件日志中写入错误日志
				LogEvent( currentError.ToString(), EventLogEntryType.Error );
			}
			//在页面中显示错误
			Response.Write( errMsg );
			//清除异常
			Server.ClearError();
		}

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

		}
	#endregion
	}
}