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程序中常用的种代码

发布于:2016-03-01 19:14:22   分享到:

1.?打开新的窗口并传送参数:?
传送参数:
response.write("<script>window.open('*.aspx?id="+this.DropDownList1.SelectIndex+"&id1="+...+"')</script>")

接收参数:
string?a?=?Request.QueryString("id");
string?b?=?Request.QueryString("id1");
  
2.为按钮添加对话框
Button1.Attributes.Add("onclick","return?confirm('确认?')");
button.attributes.add("onclick","if(confirm('are?you?sure...?')){return?true;}else{return?false;}")
  
3.删除表格选定记录
int?intEmpID?=?(int)MyDataGrid.DataKeys[e.Item.ItemIndex];
string?deleteCmd?=?"DELETE?from?Employee?where?emp_id?=?"?+?intEmpID.ToString()
  
4.删除表格记录警告
private?void?DataGrid_ItemCreated(Object?sender,DataGridItemEventArgs?e)
{
 switch(e.Item.ItemType)
 {
  case?ListItemType.Item?:
  case?ListItemType.AlternatingItem?:
  case?ListItemType.EditItem:
   TableCell?myTableCell;
   myTableCell?=?e.Item.Cells[14];
   LinkButton?myDeleteButton?;
   myDeleteButton?=?(LinkButton)myTableCell.Controls[0];
   myDeleteButton.Attributes.Add("onclick","return?confirm('您是否确定要删除这条信息');");
   break;
  default:
   break;
 }

}
  
5.点击表格行链接另一页
private?void?grdCustomer_ItemDataBound(object?sender,?System.Web.UI.WebControls.DataGridItemEventArgs?e)
{
 //点击表格打开
 if?(e.Item.ItemType?==?ListItemType.Item?||?e.Item.ItemType?==?ListItemType.AlternatingItem)
  e.Item.Attributes.Add("onclick","window.open('Default.aspx?id="?+?e.Item.Cells[0].Text?+?"');");
}
双击表格连接到另一页

在itemDataBind事件中
if(e.Item.ItemType?==?ListItemType.Item?||?e.Item.ItemType?==?ListItemType.AlternatingItem)
{
 string?OrderItemID?=e.item.cells[1].Text;
 ...
 e.item.Attributes.Add("ondblclick",?"location.href='../ShippedGrid.aspx?id="?+?OrderItemID?+?"'");
}
  
双击表格打开新一页
if(e.Item.ItemType?==?ListItemType.Item?||?e.Item.ItemType?==?ListItemType.AlternatingItem)
{
 string?OrderItemID?=e.item.cells[1].Text;
 ...
 e.item.Attributes.Add("ondblclick",?"open('../ShippedGrid.aspx?id="?+?OrderItemID?+?"')");
}?
6.表格超连接列传递参数
<asp:HyperLinkColumn?Target="_blank"?headertext="ID号"?DataTextField="id"?NavigateUrl="aaa.aspx?id='
 <%#?DataBinder.Eval(Container.DataItem,?"数据字段1")%>'?&?name='<%#?DataBinder.Eval(Container.DataItem,?"数据字段2")%>'?/>
  
7.表格点击改变颜色
if?(e.Item.ItemType?==?ListItemType.Item?||e.Item.ItemType?==?ListItemType.AlternatingItem)
{
 e.Item.Attributes.Add("onclick","this.style.backgroundColor='#99cc00';
   ?this.style.color='buttontext';this.style.cursor='default';");
}?
  写在DataGrid的_ItemDataBound里

if?(e.Item.ItemType?==?ListItemType.Item?||e.Item.ItemType?==?ListItemType.AlternatingItem)
{
e.Item.Attributes.Add("onmouseover","this.style.backgroundColor='#99cc00';
   this.style.color='buttontext';this.style.cursor='default';");
e.Item.Attributes.Add("onmouseout","this.style.backgroundColor='';this.style.color='';");
}


8.关于日期格式
日期格式设定
DataFormatString="{0:yyyy-MM-dd}"
  我觉得应该在itembound事件中

e.items.cell["你的列"].text=DateTime.Parse(e.items.cell["你的列"].text.ToString("yyyy-MM-dd"))
  9.获取错误信息并到指定页面

  不要使用Response.Redirect,而应该使用Server.Transfer

  e.g

//?in?global.asax
protected?void?Application_Error(Object?sender,?EventArgs?e)?{
if?(Server.GetLastError()?is?HttpUnhandledException)
Server.Transfer("MyErrorPage.aspx");

//其余的非HttpUnhandledException异常交给ASP.NET自己处理就okay了?:)
}
  Redirect会导致post-back的产生从而丢失了错误信息,所以页面导向应该直接在服务器端执行,这样就可以在错误处理页面得到出错信息并进行相应的处理?

10.清空Cookie
Cookie.Expires=[DateTime];
Response.Cookies("UserName").Expires?=?0

11.自定义异常处理
//自定义异常处理类?
using?System;
using?System.Diagnostics;

namespace?MyAppException
{
 ///?<summary>
 ///?从系统异常类ApplicationException继承的应用程序异常处理类。
 ///?自动将异常内容记录到Windows?NT/2000的应用程序日志
 ///?</summary>
 public?class?AppException:System.ApplicationException
 {
  public?AppException()
  {
   if?(ApplicationConfiguration.EventLogEnabled)LogEvent("出现一个未知错误。");
  }

 public?AppException(string?message)
 {
  LogEvent(message);
 }

 public?AppException(string?message,Exception?innerException)
 {
  LogEvent(message);
  if?(innerException?!=?null)
  {
   LogEvent(innerException.Message);
  }
 }

 //日志记录类
 using?System;
 using?System.Configuration;
 using?System.Diagnostics;
 using?System.IO;
 using?System.Text;
 using?System.Threading;

 namespace?MyEventLog
 {
  ///?<summary>
  ///?事件日志记录类,提供事件日志记录支持?
  ///?<remarks>
  ///?定义了4个日志记录皇冠体育的网址|首页?(error,?warning,?info,?trace)?
  ///?</remarks>
  ///?</summary>
  public?class?ApplicationLog
  {
   ///?<summary>
   ///?将错误信息记录到Win2000/NT事件日志中
   ///?<param?name="message">需要记录的文本信息</param>
   ///?</summary>
   public?static?void?WriteError(String?message)
   {
    WriteLog(TraceLevel.Error,?message);
   }

   ///?<summary>
   ///?将警告信息记录到Win2000/NT事件日志中
   ///?<param?name="message">需要记录的文本信息</param>
   ///?</summary>
   public?static?void?WriteWarning(String?message)
   {
    WriteLog(TraceLevel.Warning,?message);  
   }

   ///?<summary>
   ///?将提示信息记录到Win2000/NT事件日志中
   ///?<param?name="message">需要记录的文本信息</param>
   ///?</summary>
   public?static?void?WriteInfo(String?message)
   {
    WriteLog(TraceLevel.Info,?message);
   }
   ///?<summary>
   ///?将跟踪信息记录到Win2000/NT事件日志中
   ///?<param?name="message">需要记录的文本信息</param>
   ///?</summary>
   public?static?void?WriteTrace(String?message)
   {
    WriteLog(TraceLevel.Verbose,?message);
   }

   ///?<summary>
   ///?格式化记录到事件日志的文本信息格式
   ///?<param?name="ex">需要格式化的异常对象</param>
   ///?<param?name="catchInfo">异常信息标题字符串.</param>
   ///?<retvalue>
   ///?<para>格式后的异常信息字符串,包括异常内容和跟踪堆栈.</para>
   ///?</retvalue>
   ///?</summary>
   public?static?String?FormatException(Exception?ex,?String?catchInfo)
   {
    StringBuilder?strBuilder?=?new?StringBuilder();
    if?(catchInfo?!=?String.Empty)
    {
     strBuilder.Append(catchInfo).Append("\r\n");
    }
    strBuilder.Append(ex.Message).Append("\r\n").Append(ex.StackTrace);
    return?strBuilder.ToString();
   }

   ///?<summary>
   ///?实际事件日志写入皇冠体育的网址|首页
   ///?<param?name="level">要记录信息的级别(error,warning,info,trace).</param>
   ///?<param?name="messageText">要记录的文本.</param>
   ///?</summary>
   private?static?void?WriteLog(TraceLevel?level,?String?messageText)
   {
    try
    {?
     EventLogEntryType?LogEntryType;
     switch?(level)
     {
      case?TraceLevel.Error:
       LogEntryType?=?EventLogEntryType.Error;
       break;
      case?TraceLevel.Warning:
       LogEntryType?=?EventLogEntryType.Warning;
       break;
      case?TraceLevel.Info:
       LogEntryType?=?EventLogEntryType.Information;
       break;
      case?TraceLevel.Verbose:
       LogEntryType?=?EventLogEntryType.SuccessAudit;
       break;
      default:
       LogEntryType?=?EventLogEntryType.SuccessAudit;
       break;
     }

     EventLog?eventLog?=?new?EventLog("Application",?ApplicationConfiguration.EventLogMachineName,?ApplicationConfiguration.EventLogSourceName?);
     //写入事件日志
     eventLog.WriteEntry(messageText,?LogEntryType);

    }
   catch?{}?//忽略任何异常
  }?
 }?//class?ApplicationLog
}

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