.NET中常用的代码

时间:2007/7/7 0:41:05      阅读:3652          
整理了一些常用的.NET代码,贴出来供大家参考,并希望我们一起搜集更多的内容。
一、为GridView添加索引列
<asp:TemplateField HeaderText="ID">
<ItemTemplate>
<%# Container.DataItemIndex +1 %>
</ItemTemplate>
</asp:TemplateField>

二、批量删除列
模板列代码:
<asp:TemplateField HeaderText="选择">
<ItemTemplate>
<asp:CheckBox ID="chkSelect" runat="server" />
</ItemTemplate>
</asp:TemplateField>
全选:
for (int i = 0; i < gv.Rows.Count; i++)
{
CheckBox chkSelect
= (CheckBox)gv.Rows[i].FindControl("chkSelect");
chkSelect.Checked
= true;
}
反选:
for (int i = 0; i < gv.Rows.Count; i++)
{
CheckBox chkSelect
= (CheckBox)gv.Rows[i].FindControl("chkSelect");
chkSelect.Checked
= !chkSelect.Checked;
}
取消选择:
for (int i = 0; i < gv.Rows.Count; i++)
{
CheckBox chkSelect
= (CheckBox)gv.Rows[i].FindControl("chkSelect");
chkSelect.Checked
= false;
}
删除:
for (int i = 0; i < gv.Rows.Count; i++)
{
CheckBox chkSelect
= (CheckBox)gv.Rows[i].FindControl("chkSelect");
if (chkSelect.Checked)
{
//删除记录
}
}

三、删除表格选定记录
int id = (int)MyDataGrid.DataKeys[e.Item.ItemIndex]; //在调用前必须指定DataKeyNames属性为要获取

的主键。
string deleteCmd = "DELETE from Employee where emp_id = " + intEmpID.ToString();

四、为按钮添加确认对话框
button.Attributes.Add("onclick","return confirm(’确认?’)");

五、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 + "

’);
");
}

六、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")%>' />

七、绑定日期格式
e.items.cell["time"].text=DateTime.Parse(e.items.cell["time"].text.ToString("yyyy-MM-dd"))

八、统一捕获异常 Global.asax中:
protected void Application_Error(Object sender, EventArgs e) {
if (Server.GetLastError() is HttpUnhandledException)
Server.Transfer(
"MyErrorPage.aspx");

//编写添加到日志的代码Log.add();
}

九、自定义异常处理
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个日志记录方法 (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>
   
/// 实际事件日志写入方法
   
/// <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
}

十、Panel 横向滚动,纵向自动扩展
<asp:panel style="overflow-x:scroll;overflow-y:auto;"></asp:panel>

十一、DataGrid行随鼠标变色
private void ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
{
 
if (e.Item.ItemType!=ListItemType.Header)
 {
  e.Item.Attributes.Add(
"onmouseout","this.style.backgroundColor=\""+e.Item.Style

[
"BACKGROUND-COLOR"]+"\"");
  e.Item.Attributes.Add(
"onmouseover","this.style.backgroundColor=\""+ "#EEE6F8"+"\"");
 }
}

十二、读取DataGrid控件的TextBox值
foreach(DataGrid dgi in yourDataGrid.Items)
{
 TextBox tb
= (TextBox)dgi.FindControl("yourTextBoxId");
 tb.Text.
}

十三、当点击编辑键时,控制文本框的大小
private void DataGrid1_ItemDataBound(obj sender,DataGridItemEventArgs e)
{
 
for(int i=0;i<e.Item.Cells.Count-1;i++)
  
if(e.Item.ItemType==ListItemType.EditType)
  {
   e.Item.Cells[i].Attributes.Add(
"Width", "80px")
  }
}

十四、弹出对话框
private static string ScriptBegin = "<script language=\"JavaScript\">";
private static string ScriptEnd = "</script>";

public static void ConfirmMessageBox(string PageTarget,string Content)
{
 
string ConfirmContent="var retValue=window.confirm(’"+Content+"’);"+"if(retValue)

{window.location
="+PageTarget+"’;}";

 ConfirmContent
=ScriptBegin + ConfirmContent + ScriptEnd;

 Page ParameterPage
= (Page)System.Web.HttpContext.Current.Handler;
 ParameterPage.RegisterStartupScript(
"confirm",ConfirmContent);
 
//Response.Write(strScript);
}

评论
  • Re:.NET中常用的代码  (2007/8/13 1:50:23) by hugang 
    非常感谢提供,希望能够继续添加分享。
  • Re:.NET中常用的代码  (2007/8/22 11:13:14) by Javanew 
    FindControl用FindControl,用到反射了吧,效率有点。。。
  • Re:.NET中常用的代码  (2007/9/11 15:41:12) by 晓杨 
    我用你的代码,怎么老是出错啊,请告诉指点
  • Re:.NET中常用的代码  (2007/10/9 9:38:16) by 李峰 
    代码是03 还是05下的
     
  • Re:.NET中常用的代码  (2008/7/7 10:20:20) by tanwei 
    不错,收藏了
  • Re:.NET中常用的代码  (2009/3/13 9:01:30) by ylp1588 
    谢谢,正在用以上的部份代码.
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