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ASP.NET程序中常用的三十三種代碼

2019-11-17 03:09:06
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asp.net程序中常用的三十三種代碼

1. 打開新的窗口并傳送參數(shù):   傳送參數(shù):response.write("<scr2.為按鈕添加對(duì)話框Button1.Attributes.Add("onclick","return confirm(’確認(rèn)?’)");button.attributes.add("onclick","if(confirm(’areyou sure...?’)){return true;}else{return false;}")  3.刪除表格選定記錄int intEmpID = (int)MyDataGrid.DataKeys[e.Item.ItemIndex];string deleteCmd = "DELETE from Employee where emp_id =" + intEmpID.ToString()  4.刪除表格記錄警告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","returnconfirm(’您是否確定要?jiǎng)h除這條信息’);");   break;  default:   break; }}  5.點(diǎn)擊表格行鏈接另一頁(yè)private void grdCustomer_ItemDataBound(object sender,System.Web.UI.WebControls.DataGridItemEventArgs e){ //點(diǎn)擊表格打開 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 + "’);");}  雙擊表格連接到另一頁(yè)  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 +"’");}  雙擊表格打開新一頁(yè)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.表格超連接列傳遞參數(shù)<asp:HyperLinkColumn Target="_blank"headertext="ID號(hào)"DataTextField="id" NavigateUrl="aaa.aspx?id=’ <%# DataBinder.Eval(Container.DataItem, "數(shù)據(jù)字段1")%>’& name=’<%#DataBinder.Eval(Container.DataItem, "數(shù)據(jù)字段2")%>’/>  7.表格點(diǎn)擊改變顏色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’;");}   寫在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.關(guān)于日期格式  日期格式設(shè)定DataFormatString="{0:yyyy-MM-dd}"  我覺(jué)得應(yīng)該在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.獲取錯(cuò)誤信息并到指定頁(yè)面  不要使用Response.Redirect,而應(yīng)該使用Server.Transfer  e.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異常交給ASP.NET自己處理就okay了:)}  Redirect會(huì)導(dǎo)致post-back的產(chǎn)生從而丟失了錯(cuò)誤信息,所以頁(yè)面導(dǎo)向應(yīng)該直接在服務(wù)器端執(zhí)行,這樣就可以在錯(cuò)誤處理頁(yè)面得到出錯(cuò)信息并進(jìn)行相應(yīng)的處理   10.清空CookieCookie.Expires=[DateTime];Response.Cookies("UserName").Expires = 0  11.自定義異常處理//自定義異常處理類 using System;using System.Diagnostics;namespace MyAppException{ /// <summary> /// 從系統(tǒng)異常類ApplicationException繼承的應(yīng)用程序異常處理類。 /// 自動(dòng)將異常內(nèi)容記錄到Windows NT/2000的應(yīng)用程序日志 /// </summary> public class AppException:System.ApplicationException {  public AppException()  {   if(ApplicationConfiguration.EventLogEnabled)LogEvent("出現(xiàn)一個(gè)未知錯(cuò)誤。");  } public AppException(string message) {  LogEvent(message); } public AppException(string message,ExceptioninnerException) {  LogEvent(message);  if (innerException != null)  {   LogEvent(innerException.Message);  } } //日志記錄類 using System; using System.Configuration; using System.Diagnostics; using System.IO; using System.Text; using System.Threading; namespace MyEventLog {  /// <summary>  /// 事件日志記錄類,提供事件日志記錄支持   /// <remarks>  /// 定義了4個(gè)日志記錄方法(error, warning, info, trace)   /// </remarks>  /// </summary>  public class ApplicationLog  {   /// <summary>   /// 將錯(cuò)誤信息記錄到Win2000/NT事件日志中   /// <paramname="message">需要記錄的文本信息</param>   /// </summary>   public static void WriteError(String message)   {    WriteLog(TraceLevel.Error, message);   }   /// <summary>   /// 將警告信息記錄到Win2000/NT事件日志中   /// <paramname="message">需要記錄的文本信息</param>   /// </summary>   public static void WriteWarning(String message)   {    WriteLog(TraceLevel.Warning, message);     }   /// <summary>   /// 將提示信息記錄到Win2000/NT事件日志中   /// <paramname="message">需要記錄的文本信息</param>   /// </summary>   public static void WriteInfo(String message)   {    WriteLog(TraceLevel.Info, message);   }   /// <summary>   /// 將跟蹤信息記錄到Win2000/NT事件日志中   /// <paramname="message">需要記錄的文本信息</param>   /// </summary>   public static void WriteTrace(String message)   {    WriteLog(TraceLevel.Verbose, message);   }   /// <summary>   /// 格式化記錄到事件日志的文本信息格式   /// <paramname="ex">需要格式化的異常對(duì)象</param>   /// <paramname="catchInfo">異常信息標(biāo)題字符串.</param>   /// <retvalue>   /// <para>格式后的異常信息字符串,包括異常內(nèi)容和跟蹤堆棧.</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>   /// 實(shí)際事件日志寫入方法   /// <paramname="level">要記錄信息的級(jí)別(error,warning,info,trace).</param>   /// <paramname="messageText">要記錄的文本.</param>   /// </summary>   private static void WriteLog(TraceLevel level, StringmessageText)   {    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 = newEventLog("Application", ApplicationConfiguration.EventLogMachineName,ApplicationConfiguration.EventLogSourceName );     //寫入事件日志     eventLog.WriteEntry(messageText, LogEntryType);    }   catch {} //忽略任何異常  }  } //class ApplicationLog}

12.Panel 橫向滾動(dòng),縱向自動(dòng)擴(kuò)展<asp:panelstyle="overflow-x:scroll;overflow-y:auto;"></asp:panel>  13.回車轉(zhuǎn)換成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超級(jí)連接列DataNavigateUrlField="字段名"DataNavigateUrlFormatString="http://xx/inc/delete.aspx?ID={0}"

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