本文實(shí)例講述了asp.net實(shí)現(xiàn)非常實(shí)用的自定義頁(yè)面基類。分享給大家供大家參考，具體如下：
看到前面幾篇文章（如：《asp.net實(shí)現(xiàn)利用反射，泛型，靜態(tài)方法快速獲取表單值到Model的方法》）想到的。下面總結(jié)發(fā)布一個(gè)筆者在開發(fā)中常用的一個(gè)自定義BasePage類,廢話不多說了，直接貼代碼。
一、BasePage類
1、代碼
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); //取消頁(yè)面文本框的enter key
}
#region 取消頁(yè)面文本控件的enter key功能
/// summary>
/// 在這里我們給Form中的服務(wù)器控件添加客戶端onkeydown腳步事件，防止服務(wù)器控件按下enter鍵直接回發(fā)
/// /summary>
/// param name="controls">/param>
public virtual void CancelFormControlEnterKey(ControlCollection controls)
{
//向頁(yè)面注冊(cè)腳本 用來取消input的enter key功能
RegisterUndoEnterKeyScript();
foreach (Control item in controls)
{
//服務(wù)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)");
}
//用戶控件
else if (item is System.Web.UI.UserControl)
{
CancelFormControlEnterKey(item.Controls); //遞歸調(diào)用
}
}
}
/// summary>
/// 向頁(yè)面注冊(cè)forbidInputKeyDown腳本
/// /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/賦頁(yè)面控件的值
/// summary>
/// 從頁(yè)面中取控件值，并給對(duì)象賦值
/// /summary>
/// param name="dataType">要被賦值的對(duì)象類型/param>
/// returns>/returns>
public virtual BaseObj GetFormData(Type dataType)
{
BaseObj data = (BaseObj)Activator.CreateInstance(dataType);//實(shí)例化一個(gè)類
Type pgType = this.GetType(); //標(biāo)識(shí)當(dāng)前頁(yè)面
BindingFlags bf = BindingFlags.Public | BindingFlags.Static | BindingFlags.Instance | BindingFlags.NonPublic;//反射標(biāo)識(shí)
PropertyInfo[] propInfos = data.GetType().GetProperties();//取出所有公共屬性
foreach (PropertyInfo item in propInfos)
{
FieldInfo fiPage = pgType.GetField(item.Name, bf);//從頁(yè)面中取出滿足某一個(gè)屬性的字段
if (fiPage != null) //頁(yè)面的字段不為空,代表存在一個(gè)實(shí)例化的控件類
{
object value = null;
Control pgControl = (Control)fiPage.GetValue(this); //根據(jù)屬性，找到頁(yè)面對(duì)應(yīng)控件，這要求頁(yè)面控件命名必須和對(duì)象的屬性一一對(duì)應(yīng)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);//復(fù)選框
}
else if (controlType == typeof(DropDownList))//下拉框
{
value = ((DropDownList)pgControl).SelectedValue;
}
else if (controlType == typeof(RadioButtonList))//單選框列表
{
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)) //圖片
{
value = ((Image)pgControl).ImageUrl;
}
try
{
object realValue = null;
if (item.PropertyType.Equals(typeof(NullableDateTime>))) //泛型可空類型
{
if (value != null)
{
if (string.IsNullOrEmpty(value.ToString()))
{
realValue = null;
}
else
{
realValue = DateTime.Parse(value.ToString());
}
}
}
else if (item.PropertyType.Equals(typeof(Nullable))) //可空類型
{
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>
/// 通過對(duì)象的屬性值，給頁(yè)面控件賦值
/// /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); //根據(jù)屬性名取到頁(yè)面控件
object value = item.GetValue(data, null); //取對(duì)象的屬性值
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)) //布爾型
{
if (value.ToString().ToUpper() == "TRUE")
((CheckBox)myControl).Checked = true;
else
((CheckBox)myControl).Checked = false;
}
else if (valueType == typeof(Int32)) //整型 (正常情況下,1標(biāo)識(shí)選擇,0標(biāo)識(shí)不選)
{
((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)) //布爾型
{
if (value.ToString().ToUpper() == "TRUE")
((RadioButton)myControl).Checked = true;
else
((RadioButton)myControl).Checked = false;
}
else if (valueType == typeof(Int32)) //整型 (正常情況下,1標(biāo)識(shí)選擇,0標(biāo)識(shí)不選)
{
((RadioButton)myControl).Checked = string.Compare(value.ToString(), "1") == 0;
}
}
else if (controlType == typeof(RadioButtonList))
{
try
{
if (valueType == typeof(Boolean)) //布爾型
{
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 日志處理
/// summary>
/// 出錯(cuò)處理:寫日志,導(dǎo)航到公共出錯(cuò)頁(yè)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>
/// 處理異常，用來將主要異常信息寫入文本日志
/// /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引發(fā)異常的方法：{1}\n錯(cuò)誤信息：{2}\n錯(cuò)誤堆棧：{3}\n",
this.Request.RawUrl, ex.TargetSite, ex.Message, ex.StackTrace);
return error;
}
#endregion
}
}
2、使用反射給控件賦值
根據(jù)id取一個(gè)員工（Employee），Employee類繼承自BaseObj類，根據(jù)這個(gè)客戶對(duì)象給頁(yè)面控件賦值：
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 = "測(cè)試用戶", State = "2" };
this.SetFormData(employee); //給頁(yè)面控件賦值
}
}
}
}
3、使用反射給對(duì)象賦值
點(diǎn)擊”測(cè)試”按鈕，將頁(yè)面控件（runat=server）的值賦給實(shí)體對(duì)象：
protected void btnSet_Click(object sender, EventArgs e)
{
Employee employee = (Employee)this.GetFormData(typeof(Employee));
StringBuilder sb = new StringBuilder();
sb.Append("登錄名:" + employee.UserName + "br/>");
sb.Append("真實(shí)姓名:" + employee.RealName + "br/>");
sb.Append("所在地:" + employee.Address + "br/>");
sb.Append("是否離職:" + employee.IsLeave + "br/>");
sb.Append("在職狀態(tài):" + employee.State + "br/>");
this.ltrContext.Text = sb.ToString();
}
總結(jié)：
（1）、對(duì)于頁(yè)面中控件較多的情況，這個(gè)類里的反射取值和賦值的方法還是很有用的（比較惡心的是你要哼唧哼唧地對(duì)照實(shí)體類給頁(yè)面控件命名。kao，實(shí)體類有代碼生成器自動(dòng)生成我就忍了，頁(yè)面控件還要一一對(duì)應(yīng)地命名，估計(jì)很多程序員在這方面沒少花時(shí)間，還有就是不考慮反射對(duì)性能的影響）。不過從代碼的簡(jiǎn)潔程度來看，這個(gè)確實(shí)顯得out了；不過呢，筆者習(xí)慣了，命名多就多一些吧，在找到穩(wěn)定可靠的解決方案之前，短時(shí)間看來是不會(huì)選擇改進(jìn)的了；
（2）、如果頁(yè)面中有用戶控件（UserControl），用戶控件里的子控件直接在頁(yè)面中就比較難取到了（你可能已經(jīng)看出問題的端倪來了），解決的方法就是在用戶控件里生成實(shí)體類（這個(gè)可以模仿BasePage寫一個(gè)BaseControl類，讓用戶控件繼承BaseControl，然后取值。本來想另開一篇介紹一下的，可是發(fā)現(xiàn)實(shí)現(xiàn)代碼雷同，放棄）；
（3）、取消頁(yè)面文本框的enter key您可以參考《asp.net實(shí)現(xiàn)取消頁(yè)面表單內(nèi)文本輸入框Enter響應(yīng)的方法》；
（4）、異常處理見（二）。
二、異常處理
1、日志類（自己寫的一個(gè)簡(jiǎn)單通用的文本日志處理類）
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Web;
namespace DotNet.Common.WebForm
{
/// summary>
/// 日志類(常用的都是log4net，這里簡(jiǎn)陋地實(shí)現(xiàn)一個(gè)寫入文本日志類)
/// /summary>
public static class LogUtil
{
/// summary>
/// 寫入異常日志
/// /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
這個(gè)比較無語(yǔ)。通常用來提供一個(gè)有好的出錯(cuò)頁(yè)面。對(duì)于開發(fā)人員，建議顯示完整的異常信息。
下面貼一個(gè)對(duì)開發(fā)人員有幫助的頁(yè)面：
（1）、設(shè)計(jì)頁(yè)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>出錯(cuò)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）、實(shí)現(xiàn)代碼
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;
}
}
完整實(shí)例代碼代碼點(diǎn)擊此處本站下載。
希望本文所述對(duì)大家asp.net程序設(shè)計(jì)有所幫助。
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