asp.net实现非常实用的自定义页面基类(附源码)-巨人网络通讯

asp.net实现非常实用的自定义页面基类(附源码)

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(NullableDateTime>))) //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。

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