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[ZT].Net中的常用代码 - 博客 | 文学城
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[ZT].Net中的常用代码
(2009-09-29 15:53:24)
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来源:
http://www.360doc.com/content/080601/01/39825_1299786.html 一、为GridView添加索引列
< asp:TemplateField HeaderText = " ID " > < ItemTemplate > <% # Container.DataItemIndex + 1 %> ItemTemplate > asp:TemplateField > 二、批量删除列
模板列代码:
< asp:TemplateField HeaderText = " 选择 " > < ItemTemplate > < asp:CheckBox ID = " chkSelect " runat = " server " /> ItemTemplate > asp:TemplateField > 全选:
for ( int i = 0 ; i < gv.Rows.Count; i ++ ) { CheckBox chkSelect = (CheckBox)gv.Rows[i].FindControl( " chkSelect " ); chkSelect.Checked = true ; } 反选:
for ( int i = 0 ; i < gv.Rows.Count; i ++ ) { CheckBox chkSelect = (CheckBox)gv.Rows[i].FindControl( " chkSelect " ); chkSelect.Checked = ! chkSelect.Checked; } 取消选择:
for ( int i = 0 ; i < gv.Rows.Count; i ++ ) { CheckBox chkSelect = (CheckBox)gv.Rows[i].FindControl( " chkSelect " ); chkSelect.Checked = false ; } 删除:
for ( int i = 0 ; i < gv.Rows.Count; i ++ ) { CheckBox chkSelect = (CheckBox)gv.Rows[i].FindControl( " chkSelect " ); if (chkSelect.Checked) { // 删除记录 } }三、删除表格选定记录
int id = ( int )MyDataGrid.DataKeys[e.Item.ItemIndex]; // 在调用前必须指定DataKeyNames属性为要获取 的主键。string deleteCmd = " DELETE from Employee where emp_id = " + intEmpID.ToString(); 四、为按钮添加确认对话框
button.Attributes.Add( " onclick " , " return confirm(’确认?’) " ); 五、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 + " ’);" ); } 六、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 " ) % >’ / > 七、绑定日期格式
e.items.cell[ " time " ].text = DateTime.Parse(e.items.cell[ " time " ].text.ToString( " yyyy-MM-dd " )) 八、统一捕获异常 Global.asax中:
protected void Application_Error(Object sender, EventArgs e) { if (Server.GetLastError() is HttpUnhandledException) Server.Transfer( " MyErrorPage.aspx " ); // 编写添加到日志的代码Log.add(); } 九、自定义异常处理
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(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> /// </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 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 } 十一、DataGrid行随鼠标变色
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、读取DataGrid控件的TextBox值
foreach (DataGrid dgi in yourDataGrid.Items) { TextBox tb = (TextBox)dgi.FindControl( " yourTextBoxId " ); tb.Text . } 十三、当点击编辑键时,控制文本框的大小
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、弹出对话框
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 横向滚动,纵向自动扩展
<asp:panel style = " overflow-x:scroll;overflow-y:auto; " >< / asp:panel>