本文实例讲述了asp.net实现非常实用的自定义页面基类。分享给大家供大家参考，具体如下：
看到前面几篇文章（如：《asp.net实现利用反射，泛型，静态方法快速获取表单值到Model的方法》）想到的。下面总结发布一个笔者在开发中常用的一个自定义BasePage类,废话不多说了，直接贴代码。
一、BasePage类
1、代码
using System;using System.Data;using System.Configuration;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.Web.UI.HtmlControls;using System.Reflection;namespace DotNet.Common.WebForm{ using DotNet.Common.Model; using DotNet.Common.Util; public class BasePage : System.Web.UI.Page { public BasePage() { } protected override void OnInit(EventArgs e) { base.OnInit(e); //CancelFormControlEnterKey(this.Page.Form.Controls); //取消页面文本框的enter key } #region 取消页面文本控件的enter key功能 /// <summary> /// 在这里我们给Form中的服务器控件添加客户端onkeydown脚步事件，防止服务器控件按下enter键直接回发 /// </summary> /// <param name="controls"></param> public virtual void CancelFormControlEnterKey(ControlCollection controls) { //向页面注册脚本 用来取消input的enter key功能 RegisterUndoEnterKeyScript(); foreach (Control item in controls) { //服务器TextBox if (item.GetType() == typeof(System.Web.UI.WebControls.TextBox)) { WebControl webControl = item as WebControl; webControl.Attributes.Add("onkeydown", "return forbidInputKeyDown(event)"); } //html控件 else if (item.GetType() == typeof(System.Web.UI.HtmlControls.HtmlInputText)) { HtmlInputControl htmlControl = item as HtmlInputControl; htmlControl.Attributes.Add("onkeydown", "return forbidInputKeyDown(event)"); } //用户控件 else if (item is System.Web.UI.UserControl) { CancelFormControlEnterKey(item.Controls); //递归调用 } } } /// <summary> /// 向页面注册forbidInputKeyDown脚本 /// </summary> private void RegisterUndoEnterKeyScript() { string js = string.Empty; System.Text.StringBuilder sb = new System.Text.StringBuilder(); sb.Append("function forbidInputKeyDown(ev) {"); sb.Append(" if (typeof (ev) != /"undefined/") {"); sb.Append(" if (ev.keyCode || ev.which) {"); sb.Append(" if (ev.keyCode == 13 || ev.which == 13) { return false; }"); sb.Append(" } } }"); js = sb.ToString(); if (!this.Page.ClientScript.IsClientScriptBlockRegistered("forbidInput2KeyDown")) this.Page.ClientScript.RegisterClientScriptBlock(typeof(Page), "forbidInput2KeyDown", js, true); } #endregion #region 利用反射取/赋页面控件的值 /// <summary> /// 从页面中取控件值，并给对象赋值 /// </summary> /// <param name="dataType">要被赋值的对象类型</param> /// <returns></returns> public virtual BaseObj GetFormData(Type dataType) { BaseObj data = (BaseObj)Activator.CreateInstance(dataType);//实例化一个类 Type pgType = this.GetType(); //标识当前页面 BindingFlags bf = BindingFlags.Public | BindingFlags.Static | BindingFlags.Instance | BindingFlags.NonPublic;//反射标识 PropertyInfo[] propInfos = data.GetType().GetProperties();//取出所有公共属性 foreach (PropertyInfo item in propInfos) { FieldInfo fiPage = pgType.GetField(item.Name, bf);//从页面中取出满足某一个属性的字段 if (fiPage != null) //页面的字段不为空,代表存在一个实例化的控件类 { object value = null; Control pgControl = (Control)fiPage.GetValue(this); //根据属性，找到页面对应控件，这要求页面控件命名必须和对象的属性一一对应相同 //下面取值 Type controlType = pgControl.GetType(); if (controlType == typeof(Label)) { value = ((Label)pgControl).Text.Trim(); } else if (controlType == typeof(TextBox)) { value = ((TextBox)pgControl).Text.Trim(); } else if (controlType == typeof(HtmlInputText)) { value = ((HtmlInputText)pgControl).Value.Trim(); } else if (controlType == typeof(HiddenField)) { value = ((HiddenField)pgControl).Value.Trim(); } else if (controlType == typeof(CheckBox)) { value = (((CheckBox)pgControl).Checked);//复选框 } else if (controlType == typeof(DropDownList))//下拉框 { value = ((DropDownList)pgControl).SelectedValue; } else if (controlType == typeof(RadioButtonList))//单选框列表 { value = ((RadioButtonList)pgControl).SelectedValue; if (value != null) { if (value.ToString().ToUpper() != "TRUE" && value.ToString().ToUpper() != "FALSE") value = value.ToString() == "1" ? true : false; } } else if (controlType == typeof(Image)) //图片 { value = ((Image)pgControl).ImageUrl; } try { object realValue = null; if (item.PropertyType.Equals(typeof(Nullable<DateTime>))) //泛型可空类型 { if (value != null) { if (string.IsNullOrEmpty(value.ToString())) { realValue = null; } else { realValue = DateTime.Parse(value.ToString()); } } } else if (item.PropertyType.Equals(typeof(Nullable))) //可空类型 { realValue = value; } else { try { realValue = Convert.ChangeType(value, item.PropertyType); } catch { realValue = null; } } item.SetValue(data, realValue, null); } catch (FormatException fex) { DotNet.Common.Util.Logger.WriteFileLog(fex.Message, HttpContext.Current.Request.PhysicalApplicationPath + "LogFile"); throw fex; } catch (Exception ex) { DotNet.Common.Util.Logger.WriteFileLog(ex.Message, HttpContext.Current.Request.PhysicalApplicationPath + "LogFile"); throw ex; } } } return data; } /// <summary> /// 通过对象的属性值，给页面控件赋值 /// </summary> /// <param name="data"></param> public virtual void SetFormData(BaseObj data) { Type pgType = this.GetType(); BindingFlags bf = BindingFlags.Public | BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Static; PropertyInfo[] propInfos = data.GetType().GetProperties(); foreach (PropertyInfo item in propInfos) { FieldInfo myField = pgType.GetField(item.Name, bf); if (myField != null) { Control myControl = (Control)myField.GetValue(this); //根据属性名取到页面控件 object value = item.GetValue(data, null); //取对象的属性值 Type propType = item.PropertyType; if (value != null) { Type valueType = value.GetType(); try { Type controlType = myControl.GetType(); if (controlType == typeof(Label)) { if (valueType == typeof(DateTime)) { ((Label)myControl).Text = (Convert.ToDateTime(value)).ToShortDateString(); } else { ((Label)myControl).Text = value.ToString(); } } else if (controlType == typeof(TextBox)) { if (valueType == typeof(DateTime)) { ((TextBox)myControl).Text = (Convert.ToDateTime(value)).ToShortDateString(); } else { ((TextBox)myControl).Text = value.ToString(); } } else if (controlType == typeof(HtmlInputText)) { if (valueType == typeof(DateTime)) { ((HtmlInputText)myControl).Value = (Convert.ToDateTime(value)).ToShortDateString(); } else { ((HtmlInputText)myControl).Value = value.ToString(); } } else if (controlType == typeof(HiddenField)) { ((HiddenField)myControl).Value = value.ToString(); } else if (controlType == typeof(CheckBox)) { if (valueType == typeof(Boolean)) //布尔型 { if (value.ToString().ToUpper() == "TRUE") ((CheckBox)myControl).Checked = true; else ((CheckBox)myControl).Checked = false; } else if (valueType == typeof(Int32)) //整型 (正常情况下,1标识选择,0标识不选) { ((CheckBox)myControl).Checked = string.Compare(value.ToString(), "1") == 0; } } else if (controlType == typeof(DropDownList)) { try { ((DropDownList)myControl).SelectedValue = value.ToString(); } catch { ((DropDownList)myControl).SelectedIndex = -1; } } else if (controlType == typeof(RadioButton)) { if (valueType == typeof(Boolean)) //布尔型 { if (value.ToString().ToUpper() == "TRUE") ((RadioButton)myControl).Checked = true; else ((RadioButton)myControl).Checked = false; } else if (valueType == typeof(Int32)) //整型 (正常情况下,1标识选择,0标识不选) { ((RadioButton)myControl).Checked = string.Compare(value.ToString(), "1") == 0; } } else if (controlType == typeof(RadioButtonList)) { try { if (valueType == typeof(Boolean)) //布尔型 { if (value.ToString().ToUpper() == "TRUE") ((RadioButtonList)myControl).SelectedValue = "1"; else ((RadioButtonList)myControl).SelectedValue = "0"; } else ((RadioButtonList)myControl).SelectedValue = value.ToString(); } catch { ((RadioButtonList)myControl).SelectedIndex = -1; } } else if (controlType == typeof(Image)) { ((Image)myControl).ImageUrl = value.ToString(); } } catch (FormatException fex) { DotNet.Common.Util.Logger.WriteFileLog(fex.Message, HttpContext.Current.Request.PhysicalApplicationPath + "LogFile"); } catch (Exception ex) { DotNet.Common.Util.Logger.WriteFileLog(ex.Message, HttpContext.Current.Request.PhysicalApplicationPath + "LogFile"); } } } } } #endregion #region 日志处理 /// <summary> /// 出错处理:写日志,导航到公共出错页面 /// </summary> /// <param name="e"></param> protected override void OnError(EventArgs e) { Exception ex = this.Server.GetLastError(); string error = this.DealException(ex); DotNet.Common.Util.Logger.WriteFileLog(error, HttpContext.Current.Request.PhysicalApplicationPath + "LogFile"); if (ex.InnerException != null) { error = this.DealException(ex); DotNet.Common.Util.Logger.WriteFileLog(error, HttpContext.Current.Request.PhysicalApplicationPath + "LogFile"); } this.Server.ClearError(); this.Response.Redirect("/Error.aspx"); } /// <summary> /// 处理异常，用来将主要异常信息写入文本日志 /// </summary> /// <param name="ex"></param> /// <returns></returns> private string DealException(Exception ex) { this.Application["StackTrace"] = ex.StackTrace; this.Application["MessageError"] = ex.Message; this.Application["SourceError"] = ex.Source; this.Application["TargetSite"] = ex.TargetSite.ToString(); string error = string.Format("URl：{0}/n引发异常的方法：{1}/n错误信息：{2}/n错误堆栈：{3}/n", this.Request.RawUrl, ex.TargetSite, ex.Message, ex.StackTrace); return error; } #endregion }} 2、使用反射给控件赋值
根据id取一个员工（Employee），Employee类继承自BaseObj类，根据这个客户对象给页面控件赋值：
using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using System.Text;using System.Threading;namespace WebTest{ using DotNet.Common.WebForm; using DotNet.Common.Model; using EntCor.Hrm.Model; public partial class _Default : BasePage { protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { Employee employee = new Employee { ID = 1, UserName = "jeff wong", Address = "北京", IsLeave = false, RealName = "测试用户", State = "2" }; this.SetFormData(employee); //给页面控件赋值 } } }} 3、使用反射给对象赋值
点击”测试”按钮，将页面控件（runat=server）的值赋给实体对象：
protected void btnSet_Click(object sender, EventArgs e){ Employee employee = (Employee)this.GetFormData(typeof(Employee)); StringBuilder sb = new StringBuilder(); sb.Append("登录名:" + employee.UserName + "<br/>"); sb.Append("真实姓名:" + employee.RealName + "<br/>"); sb.Append("所在地:" + employee.Address + "<br/>"); sb.Append("是否离职:" + employee.IsLeave + "<br/>"); sb.Append("在职状态:" + employee.State + "<br/>"); this.ltrContext.Text = sb.ToString();} 总结：
（1）、对于页面中控件较多的情况，这个类里的反射取值和赋值的方法还是很有用的（比较恶心的是你要哼唧哼唧地对照实体类给页面控件命名。kao，实体类有代码生成器自动生成我就忍了，页面控件还要一一对应地命名，估计很多程序员在这方面没少花时间，还有就是不考虑反射对性能的影响）。不过从代码的简洁程度来看，这个确实显得out了；不过呢，笔者习惯了，命名多就多一些吧，在找到稳定可靠的解决方案之前，短时间看来是不会选择改进的了；
（2）、如果页面中有用户控件（UserControl），用户控件里的子控件直接在页面中就比较难取到了（你可能已经看出问题的端倪来了），解决的方法就是在用户控件里生成实体类（这个可以模仿BasePage写一个BaseControl类，让用户控件继承BaseControl，然后取值。本来想另开一篇介绍一下的，可是发现实现代码雷同，放弃）；
（3）、取消页面文本框的enter key您可以参考《asp.net实现取消页面表单内文本输入框Enter响应的方法》；
（4）、异常处理见（二）。
二、异常处理
1、日志类（自己写的一个简单通用的文本日志处理类）
using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.IO;using System.Web;namespace DotNet.Common.WebForm{ /// <summary> /// 日志类(常用的都是log4net，这里简陋地实现一个写入文本日志类) /// </summary> public static class LogUtil { /// <summary> /// 写入异常日志 /// </summary> /// <param name="ex"></param> public static void WriteFileLog(string exMsg) { string path = HttpContext.Current.Request.PhysicalApplicationPath + "LogFile"; FileStream fs = null; StreamWriter m_streamWriter = null; try { if (!Directory.Exists(path)) { Directory.CreateDirectory(path); } path = path + "//" + DateTime.Now.ToString("yyyyMMdd") + ".txt"; fs = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Write); m_streamWriter = new StreamWriter(fs); m_streamWriter.BaseStream.Seek(0, SeekOrigin.End); m_streamWriter.WriteLine(DateTime.Now.ToString() + "/n"); m_streamWriter.WriteLine("-----------------------------------------------------------"); m_streamWriter.WriteLine("-----------------------------------------------------------"); m_streamWriter.WriteLine(exMsg); m_streamWriter.WriteLine("-----------------------------------------------------------"); m_streamWriter.WriteLine("-----------------------------------------------------------"); m_streamWriter.Flush(); } finally { if (m_streamWriter != null) { m_streamWriter.Close(); } if (fs != null) { fs.Close(); } } } }} 2、Error.aspx
这个比较无语。通常用来提供一个有好的出错页面。对于开发人员，建议显示完整的异常信息。
下面贴一个对开发人员有帮助的页面：
（1）、设计页面
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Error.aspx.cs" Inherits="Error" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"> <title>出错啦</title></head><body> <form id="form1" runat="server"> <div> <table width='100%' align='center' style='font-size: 10pt; font-family: Trebuchet MS, Arial'> <tr align='center'> <td align="center" colspan="2"> <b>Error on page</b> </td> </tr> <tr> <td align='right' width="200"> <b>stackTrace :</b> </td> <td align='left'> <asp:Label ID="lblStackTrace" runat="server"></asp:Label> </td> </tr> <tr> <td align='right'> <b>Error message :</b> </td> <td align='left'> <asp:Label ID="lblMessageError" runat="server"></asp:Label> </td> </tr> <tr> <td align='right'> <b>Source :</b> </td> <td align='left'> <asp:Label ID="lblSourceError" runat="server"></asp:Label> </td> </tr> <tr> <td align='right'> <b>TargetSite :</b> </td> <td align='left'> <asp:Label ID="lblTagetSiteError" runat="server"></asp:Label> </td> </tr> </table> </div> </form></body></html>
（2）、实现代码
using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;public partial class ErrorPage : System.Web.UI.Page{ protected void Page_Load(object sender, EventArgs e) { this.lblStackTrace.Text = this.Application["StackTrace"] as string; this.lblMessageError.Text = this.Application["MessageError"] as string; this.lblSourceError.Text = this.Application["SourceError"] as string; this.lblTagetSiteError.Text = this.Application["TargetSite"] as string; }} 完整实例代码代码点击此处本站下载。
希望本文所述对大家asp.net程序设计有所帮助。
