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。
