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[ZT].Net中的常用代碼 - 博客 | 文學城
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[ZT].Net中的常用代碼
(2009-09-29 15:53:24)
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來源:
http://www.360doc.com/content/080601/01/39825_1299786.html 一、為GridView添加索引列
< asp:TemplateField HeaderText = " ID " > < ItemTemplate > <% # Container.DataItemIndex + 1 %> ItemTemplate > asp:TemplateField > 二、批量刪除列
模板列代碼:
< asp:TemplateField HeaderText = " 選擇 " > < ItemTemplate > < asp:CheckBox ID = " chkSelect " runat = " server " /> ItemTemplate > asp:TemplateField > 全選:
for ( int i = 0 ; i < gv.Rows.Count; i ++ ) { CheckBox chkSelect = (CheckBox)gv.Rows[i].FindControl( " chkSelect " ); chkSelect.Checked = true ; } 反選:
for ( int i = 0 ; i < gv.Rows.Count; i ++ ) { CheckBox chkSelect = (CheckBox)gv.Rows[i].FindControl( " chkSelect " ); chkSelect.Checked = ! chkSelect.Checked; } 取消選擇:
for ( int i = 0 ; i < gv.Rows.Count; i ++ ) { CheckBox chkSelect = (CheckBox)gv.Rows[i].FindControl( " chkSelect " ); chkSelect.Checked = false ; } 刪除:
for ( int i = 0 ; i < gv.Rows.Count; i ++ ) { CheckBox chkSelect = (CheckBox)gv.Rows[i].FindControl( " chkSelect " ); if (chkSelect.Checked) { // 刪除記錄 } }三、刪除表格選定記錄
int id = ( int )MyDataGrid.DataKeys[e.Item.ItemIndex]; // 在調用前必須指定DataKeyNames屬性為要獲取 的主鍵。string deleteCmd = " DELETE from Employee where emp_id = " + intEmpID.ToString(); 四、為按鈕添加確認對話框
button.Attributes.Add( " onclick " , " return confirm(’確認?’) " ); 五、點擊表格行鏈接另一頁
private void grdCustomer_ItemDataBound( object sender, System.Web.UI.WebControls.DataGridItemEventArgs e) { // 點擊表格打開 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 + " ’);" ); } 六、超連接列傳遞參數
<asp:HyperLinkColumn Target = " _blank " headertext = " ID號 " DataTextField = " id " NavigateUrl = " aaa.aspx?id=’ < % # DataBinder.Eval(Container.DataItem, " 數據字段1 " ) % >’ & name = ’< % # DataBinder.Eval (Container.DataItem, " 數據字段2 " ) % >’ / > 七、綁定日期格式
e.items.cell[ " time " ].text = DateTime.Parse(e.items.cell[ " time " ].text.ToString( " yyyy-MM-dd " )) 八、統一捕獲異常 Global.asax中:
protected void Application_Error(Object sender, EventArgs e) { if (Server.GetLastError() is HttpUnhandledException) Server.Transfer( " MyErrorPage.aspx " ); // 編寫添加到日誌的代碼Log.add(); } 九、自定義異常處理
using System; using System.Diagnostics; namespace MyAppException { /**/ /// <summary> /// 從係統異常類ApplicationException繼承的應用程序異常處理類。 /// 自動將異常內容記錄到Windows NT/2000的應用程序日誌 /// </summary> public class AppException:System.ApplicationException { public AppException() { if (ApplicationConfiguration.EventLogEnabled)LogEvent( " 出現一個未知錯誤。 " ); } public AppException( string message) { LogEvent(message); } public AppException( string message,Exception innerException) { LogEvent(message); if (innerException != null ) { LogEvent(innerException.Message); } } // 日誌記錄類 using System; using System.Configuration; using System.Diagnostics; using System.IO; using System.Text; using System.Threading; namespace MyEventLog { /**/ /// <summary> /// 事件日誌記錄類,提供事件日誌記錄支持 /// <remarks> /// 定義了4個日誌記錄方法 (error, warning, info, trace) /// </remarks> /// </summary> public class ApplicationLog { /**/ /// <summary> /// 將錯誤信息記錄到Win2000/NT事件日誌中 /// <param name="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事件日誌中 /// <param name="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事件日誌中 /// <param name="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事件日誌中 /// <param name="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誌的文本信息格式 /// <param name="ex">需要格式化的異常對象</param> /// <param name="catchInfo">異常信息標題字符串.</param> /// <retvalue> /// <para>格式後的異常信息字符串,包括異常內容和跟蹤堆棧.</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> /// 實際事件日誌寫入方法 /// <param name="level">要記錄信息的級別(error,warning,info,trace).</param> /// <param name="messageText">要記錄的文本.</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 ); // 寫入事件日誌 eventLog.WriteEntry(messageText, LogEntryType); } catch {} // 忽略任何異常 } } // class ApplicationLog } 十一、DataGrid行隨鼠標變色
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、讀取DataGrid控件的TextBox值
foreach (DataGrid dgi in yourDataGrid.Items) { TextBox tb = (TextBox)dgi.FindControl( " yourTextBoxId " ); tb.Text . } 十三、當點擊編輯鍵時,控製文本框的大小
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、彈出對話框
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); } 十、Panel 橫向滾動,縱向自動擴展
<asp:panel style = " overflow-x:scroll;overflow-y:auto; " >< / asp:panel>