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ASP.NET中经常使用的种代码实例剖析【C#.Net教程】,ASP.NET,种代码

作者:搜教程发布时间:2019-11-27分类:.Net教程浏览:85评论:0


导读:1.翻开新的窗口并传送参数:传送参数:response.write("<script>window.open('*.aspx?id="+this.DropDown...
1. 翻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>")

吸收参数:

string a = Request.QueryString("id"); 
string b = Request.QueryString("id1");

2.为按钮增加对话框

Button1.Attributes.Add("onclick","return confirm('确认?')"); 
button.attributes.add("onclick","if(confirm('are you sure...?')){return true;}else{return false;}")

3.删除表格选定纪录

int intEmpID = (int)MyDataGrid.DataKeys[e.Item.ItemIndex]; 
string deleteCmd = "DELETE from Employee where emp_id = " + intEmpID.ToString()

4.删除表格纪录正告

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('您是不是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) 
{ 
 //点击表格翻开 
 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 + "');"); 
} 
双击表格衔接到另一页 
在itemDataBind事宜中 
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 + "'"); 
} 
   
双击表格翻开新一页 
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.表格超衔接列通报参数

<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.表格点击转变色彩

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.关于日期花样

日期花样设定 
DataFormatString="{0:yyyy-MM-dd}" 
  我以为应当在itembound事宜中 
e.items.cell["你的列"].text=DateTime.Parse(e.items.cell["你的列"].text.ToString("yyyy-MM-dd"))

  9.猎取毛病信息并到指定页面
  不要运用Response.Redirect,而应当运用Server.Transfer
  e.g

// in global.asax 
protected void Application_Error(Object sender, EventArgs e) { 
if (Server.GetLastError() is HttpUnhandledException) 
Server.Transfer("MyErrorPage.aspx"); 
//其他的非HttpUnhandledException非常交给ASP.NET本身处置惩罚就okay了 :) 
} 
  Redirect会致使post-back的发生从而丧失了毛病信息,所以页面导向应当直接在服务器端实行,如许就能够在毛病处置惩罚页面获得失足信息并进行响应的处置惩罚

10.清空Cookie

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

11.自定义非常处置惩罚

//自定义非常处置惩罚类  
using System; 
using System.Diagnostics; 
namespace MyAppException 
{ 
 /// <summary> 
 /// 从体系非常类ApplicationException继续的应用程序非常处置惩罚类。 
 /// 自动将非常内容纪录到Windows NT/2000的应用程序日记 
 /// </summary> 
 public class AppException:System.ApplicationException 
 { 
  public AppException() 
  { 
   if (ApplicationConfiguration.EventLogEnabled)LogEvent("涌现一个未知毛病。"); 
  } 
 public AppException(string message) 
 { 
  LogEvent(message); 
 } 
 public AppException(string message,Exception innerException) 
 { 
  LogEvent(message); 
  if (innerException != null) 
  { 
   LogEvent(innerException.Message); 
  } 
 } 
 //日记纪录类 
 using System; 
 using System.Configuration; 
 using System.Diagnostics; 
 using System.IO; 
 using System.Text; 
 using System.Threading; 
 namespace MyEventLog 
 { 
  /// <summary> 
  /// 事宜日记纪录类,供应事宜日记纪录支撑  
  /// <remarks> 
  /// 定义了4个日记纪录要领 (error, warning, info, trace)  
  /// </remarks> 
  /// </summary> 
  public class ApplicationLog 
  { 
   /// <summary> 
   /// 将毛病信息纪录到Win2000/NT事宜日记中 
   /// <param name="message">须要纪录的文本信息</param> 
   /// </summary> 
   public static void WriteError(String message) 
   { 
    WriteLog(TraceLevel.Error, message); 
   } 
   /// <summary> 
   /// 将正告信息纪录到Win2000/NT事宜日记中 
   /// <param name="message">须要纪录的文本信息</param> 
   /// </summary> 
   public static void WriteWarning(String message) 
   { 
    WriteLog(TraceLevel.Warning, message);   
   } 
   /// <summary> 
   /// 将提醒信息纪录到Win2000/NT事宜日记中 
   /// <param name="message">须要纪录的文本信息</param> 
   /// </summary> 
   public static void WriteInfo(String message) 
   { 
    WriteLog(TraceLevel.Info, message); 
   } 
   /// <summary> 
   /// 将跟踪信息纪录到Win2000/NT事宜日记中 
   /// <param name="message">须要纪录的文本信息</param> 
   /// </summary> 
   public static void WriteTrace(String message) 
   { 
    WriteLog(TraceLevel.Verbose, message); 
   } 
   /// <summary> 
   /// 花样化纪录到事宜日记的文本信息花样 
   /// <param name="ex">须要花样化的非常对象</param> 
   /// <param name="catchInfo">非常信息题目字符串.</param> 
   /// <retvalue> 
   /// <para>花样后的非常信息字符串,包含非常内容和跟踪客栈.</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> 
   /// 现实事宜日记写入要领 
   /// <param name="level">要纪录信息的级别(error,warning,info,trace).</param> 
   /// <param name="messageText">要纪录的文本.</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 ); 
     //写入事宜日记 
     eventLog.WriteEntry(messageText, LogEntryType); 
    } 
   catch {} //疏忽任何非常 
  }  
 } //class ApplicationLog 
}

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