Aspnet开发必备51种代码非常实用.docx

1、Aspnet开发必备51种代码非常实用1./弹出对话框.点击转向指定页面 Response.Write(window.alert(该会员没有提交申请,请重新提交！);Response.Write(window.location =/upmeb.aspx);2./弹出对话框Response.Write(alert(产品添加成功！);3./删除文件string filename =157517.jpg;./file/)+filename);4./绑定下拉列表框datalist dv=conn.Exec_ex(select -1 as code,请选择经营模式 as content from dea

2、lin union select code,content from dealin);content;code; ;dealincode.ToString().Selected=true;5./时间去秒显示6./标题带链接%# + DataBinder.Eval(Container.DataItem,proname)+%7./修改转向%# +修改+%8./弹出确定按钮%# +删除+%9./输出数据格式化 0:F2 是格式 F2表示小数点后剩两位10./提取动态网页内容Uri uri = new Uri(); WebRequest req = WebRequest.Create(uri); We

3、bResponse resp = req.GetResponse(); Stream str = resp.GetResponseStream(); StreamReader sr = new StreamReader(str,; string t = sr.ReadToEnd(); ;11./获取 . 后面的字符i.ToString().Trim().Substring(i.ToString().Trim().LastIndexOf(.)+1).ToLower().Trim()12. 打开新的窗口并传送参数： 传送参数：response.write(scriptwindow.open(*.a

4、spx?id=+&id1=+.+)/script)接收参数：string a = Request.QueryString(id);string b = Request.QueryString(id1);12.为按钮添加对话框onclick,return confirm(确认?);onclick,if(confirm(are you sure.?)return true;elsereturn false;)13.删除表格选定记录int intEmpID = (int)MyDataGrid.DataKeys;string deleteCmd = Delete from Employee where

5、 emp_id = + intEmpID.ToString()14.删除表格记录警告private void DataGrid_ItemCreated(Object sender,DataGridItemEventArgs e)switch(case ListItemType.Item :case ListItemType.AlternatingItem :case ListItemType.EditItem:TableCell myTableCell;myTableCell = ;LinkButton myDeleteButton ;myDeleteButton = (LinkButton)

6、myTableCell.Controls0;onclick,return confirm(您是否确定要删除这条信息););break;default:break;15.点击表格行链接另一页private void grdCustomer_ItemDataBound(object sender, e)/点击表格打开if ( = ListItemType.Item | = ListItemType.AlternatingItem)onclick,window.open(Default.aspx?id= + + ););双击表格连接到另一页在itemDataBind事件中if( = ListItem

7、Type.Item | = ListItemType.AlternatingItem)string orderItemID =;ondblclick, location.href=./ShippedGrid.aspx?id= + orderItemID + );双击表格打开新一页if( = ListItemType.Item | = ListItemType.AlternatingItem)string orderItemID =;ondblclick, open(./ShippedGrid.aspx?id= + orderItemID + );16.表格超连接列传递参数asp:HyperLi

8、nkColumn 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)% /17.表格点击改变颜色if ( = ListItemType.Item | = ListItemType.AlternatingItem)onclick,; ;); 写在DataGrid的_ItemDataBound里if ( = Lis

9、tItemType.Item | = ListItemType.AlternatingItem)onmouseover,;);onmouseout,;);18.关于日期格式日期格式设定DataFormatString=0:yyyy-MM-dd我觉得应该在itembound事件中你的列.text=DateTime.Parse(你的列.text.ToString(yyyy-MM-dd)19.获取错误信息并到指定页面不要使用Response.Redirect,而应该使用Server.Transfere.g/ in global.asaxprotected void Application_Error

10、(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postback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 20.清空CookieCookie.Expires=DateTime;Response.Cookies(UserN

11、ame).Expires = 021.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/ /summarypublic class AppException:System.ApplicationExceptionpublic AppException()if (ApplicationConfiguration.Event

12、LogEnabled)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 S

13、ystem.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/ /summarypublic 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/ /summarypublic static void Wr

14、iteError(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/ /summarypublic 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/ /summ

15、arypublic 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/ /summarypublic 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/pa

16、ram/ 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/ /summarypublic static String FormatException(Exception ex, String catchInfo)StringBuilder strBuilder = new StringBuilder();if (catchInfo != String.Empty)strBuilder.Append(catchInfo).Append(rn);strBuild

17、er.Append(ex.Message).Append(rn).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/ /summaryprivate static void WriteLog(TraceLevel level, String messageText)try EventLogEntryType L

18、ogEntryType;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.Success

19、Audit;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 ApplicationLog2

20、2.Panel 横向滚动，纵向自动扩展asp:panel style=overflow-x:scroll;overflow-y:auto;/asp:panel23.回车转换成Tab (1)script language=javascript for=document event=onkeydownif(event.keyCode=13 & & & & ; event.keyCode=9;/script(2) /当在有keydown事件的控件上敲回车时，变为tabpublic void Tab(System.Web .UI.WebControls .WebControl webcontrol)

21、webcontrol.Attributes .Add (onkeydown, if(event.keyCode=13) event.keyCode=9); 24.DataGrid超级连接列DataNavigateUrlField=字段名 DataNavigateUrlFormatString=25.DataGrid行随鼠标变色private void DGzf_ItemDataBound(object sender, e)if ( onmouseout,+BACKGROUND-COLOR+); onmouseover,+ #EFF3F7+);26.模板列ASP:TEMPLATECOLUMN v

22、isible=False sortexpression=demo headertext=IDITEMTEMPLATEASP LABEL text=%# DataBinder.Eval(Container.DataItem, ArticleID)% runat=server width=80% id=lblColumn /ITEMTEMPLATE/ASP:TEMPLATECOLUMNASP:TEMPLATECOLUMN headertext=选中HEADERSTYLE wrap=False horiz/HEADERSTYLEITEMTEMPLATEASP:CHECKBOX id=chkExpor

23、t runat=server /ITEMTEMPLATEEDITITEMTEMPLATEASP:CHECKBOX id=chkExportON runat=server enabled=true /EDITITEMTEMPLATE/ASP:TEMPLATECOLUMN后台代码protected void CheckAll_CheckedChanged(object sender, System.EventArgs e)/改变列的选定，实现全选或全不选。CheckBox chkExport ;if( CheckAll.Checked)foreach(DataGridItem oDataGridI

24、tem in MyDataGrid.Items)chkExport = (CheckBox)oDataGridItem.FindControl(chkExport);chkExport.Checked = true;elseforeach(DataGridItem oDataGridItem in MyDataGrid.Items)chkExport = (CheckBox)oDataGridItem.FindControl(chkExport);chkExport.Checked = false;27.数字格式化【%#Container.DataItem(price)%的结果是500.000

25、0，怎样格式化为500.00?】%#Container.DataItem(price,0:￥#,#0.00)%int i=123456;string s=i.ToString(#,#.00);28.日期格式化【aspx页面内：%# DataBinder.Eval(Container.DataItem,Company_Ureg_Date)%显示为： 2004-8-11 19:44:28我只想要：2004-8-11 】%# DataBinder.Eval(Container.DataItem,Company_Ureg_Date,0:yyyy-M-d)%应该如何改？【格式化日期】取出来,一般是object(DateTime)objectFromDB).ToString(yyyy-MM-dd);【日期的验证表达式】A.以下正确的输入格式： 2004-2-29, 2004-02-29 10:29:39 pm, 2004/12/31 (d2(02468048)|(1357926)-/s?(0?13578)|(102)-/s?(0?1-9)|(1-20-9)|(301)|(0?469)|(11)-/s?(0?1-9)|(1-20-9)|(30)|(0?2