Go homepage(回首页)
Upload pictures (上传图片)
Write articles (发文字帖)

The author:(作者)归海一刀
published in(发表于) 2014/1/30 1:57:37
精选ASP.NET的实用代码_[Asp.Net教程]

精选ASP.NET的实用代码_[Asp.Net教程]











1. 打开新的窗口并传送参数:
传送参数:
response.write("") 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 + "’)");
}
★特别注意:【?id=】 处不能为 【?id =】
6.表格超连接列传递参数
’ & 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
{
 ///
 /// 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
 ///

 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
 {
///
/// 事件日志记录类,提供事件日志记录支持
///
/// 定义了4个日志记录方法 (error, warning, info, trace)
///

///

public class ApplicationLog
{
 ///
 /// 将错误信息记录到Win2000/NT事件日志中
 /// 需要记录的文本信息
 ///

 public static void WriteError(String message)
 {
WriteLog(TraceLevel.Error, message);
 }
 ///
 /// 将警告信息记录到Win2000/NT事件日志中
 /// 需要记录的文本信息
 ///

 public static void WriteWarning(String message)
 {
WriteLog(TraceLevel.Warning, message);
 }
 ///
 /// 将提示信息记录到Win2000/NT事件日志中
 /// 需要记录的文本信息
 ///

 public static void WriteInfo(String message)
 {
WriteLog(TraceLevel.Info, message);
 }
 ///
 /// 将跟踪信息记录到Win2000/NT事件日志中
 /// 需要记录的文本信息
 ///

 public static void WriteTrace(String message)
 {
WriteLog(TraceLevel.Verbose, message);
 }
 ///
 /// 格式化记录到事件日志的文本信息格式
 /// 需要格式化的异常对象
 /// 异常信息标题字符串.
 ///
 /// 格式后的异常信息字符串,包括异常内容和跟踪堆栈.
 ///

 ///

 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();
 }
 ///
 /// 实际事件日志写入方法
 /// 要记录信息的级别(error,warning,info,trace).
 /// 要记录的文本.
 ///

 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
}

12.Panel 横向滚动,纵向自动扩展

13.回车转换成Tab
onkeydown="if(event.keyCode==13) event.keyCode=9"

14.DataGrid超级连接列
DataNavigateUrlField="字段名" DataNavigateUrlFormatString="http://xx/inc/delete.aspx?ID={0}"
15.DataGrid行随鼠标变色
private void DGzf_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=\""+ "#EFF3F7"+"\"");
 }
}














If you have any requirements, please contact webmaster。(如果有什么要求,请联系站长)





QQ:154298438
QQ:417480759