NET程序中常用的三十三种代码

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 + "’)"); }★特别注意：【?id=】处不能为【?id =】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("onmouseov er","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.Transfere.g// in global.asaxprotected 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CookieCookie.Expires=[DateTime];Response.Cookies("UserName").Expires = 011.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(, 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 :LogEntryType = rmation;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＜asp:panel style="overflow-x:scroll;overflow-y:auto;"＞＜/asp:panel＞13.回车转换成Tab＜script language="javascript" for="document" event="onkeydown"＞if(event.keyCode==13 && event.srcElement.type!=’button’&& event.srcElement.type!=’submit’&& event.srcElement.type!=’reset’&& event.srcElement.type!=’’&& event.srcElement.type!=’textarea’);event.keyCode=9;＜/script＞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["BACKGRO UND-COLOR"]+"\"");e.Item.Attributes.Add( "onmouseover","this.style.backgroundColor=\""+ "#EFF3F7"+"\""); }}16.模板列＜ASP:TEMPLATECOLUMN visible="False" sortexpression="demo" headertext="ID"＞＜ITEMTEMPLATE＞＜ASP:LABEL text=’＜%# DataBinder.Eval(Container.DataItem, "ArticleID")%＞’runat="server" width="80%" id="lblColumn" /＞＜/ITEMTEMPLATE＞＜/ASP:TEMPLATECOLUMN＞＜ASP:TEMPLATECOLUMN headertext="选中"＞＜HEADERSTYLE wrap="False" horizontalalign="Center"＞＜/HEADERSTYLE＞＜ITEMTEMPLATE＞＜ASP:CHECKBOX id="chkExport" runat="server" /＞＜/ITEMTEMPLATE＞＜EDITITEMTEMPLATE＞＜ASP: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。