ASP.NET+Javascript小技巧

来源:互联网 发布:一号大药房 淘宝天猫 编辑:程序博客网 时间:2024/05/01 15:31
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","returnconfirm(‘确认?’)");button.attributes.add("onclick","if(confirm(‘areyou sure……?’)){return true;}else{return false;}")
  3.删除表格选定记录
  int intEmpID =(int)MyDataGrid.DataKeys[e.Item.ItemIndex];stringdeleteCmd = "DELETE from Employee where emp_id = " + intEmpID.ToString()
  4.删除表格记录警告
  private void DataGrid_ItemCreated(Objectsender,DataGridItemEventArgs e)
  { switch(e.Item.ItemType)
  { case ListItemType.Item :case ListItemType.AlternatingItem :caseListItemType.EditItem:TableCell myTableCell;myTableCell =e.Item.Cells[14];LinkButton myDeleteButton ;myDeleteButton =(LinkButton)myTableCell.Controls[0];myDeleteButton.Attributes.Add("onclick","returnconfirm(‘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.DataGridItemEventArgse)
  { //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.Text;……
  e.item.Attributes.Add("ondblclick","location.‘……/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.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("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.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.Transfer
  e.g
  // in global.asax protected void Application_Error(Object sender,EventArgs e) { if (Server.GetLastError() isHttpUnhandledException)
  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Cookie
  Cookie.Expires=[DateTime];Response.Cookies("UserName")。Expires =0
  11.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,ExceptioninnerException)
  { LogEvent(message);if (innerException != null)
  { LogEvent(innerException.Message);}
  //日志记录类using System;using System.Configuration;usingSystem.Diagnostics;using System.IO;using System.Text;usingSystem.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/// <paramname="message">需要记录的文本信息</param>/// </summary>public static voidWriteError(String message)
  { WriteLog(TraceLevel.Error, message);}
  /// <summary>/// 将警告信息记录到Win2000/NT事件日志中/// <paramname="message">需要记录的文本信息</param>/// </summary>public static voidWriteWarning(String message)
  { WriteLog(TraceLevel.Warning, message);}
  /// <summary>/// 将提示信息记录到Win2000/NT事件日志中/// <paramname="message">需要记录的文本信息</param>/// </summary>public static voidWriteInfo(String message)
  { WriteLog(TraceLevel.Info, message);} /// <summary>///将跟踪信息记录到Win2000/NT事件日志中/// <paramname="message">需要记录的文本信息</param>/// </summary>public static voidWriteTrace(String message)
  { WriteLog(TraceLevel.Verbose, message);}
  /// <summary>/// 格式化记录到事件日志的文本信息格式/// <paramname="ex">需要格式化的异常对象</param>/// <paramname="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 StringFormatException(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);returnstrBuilder.ToString();}
  /// <summary>/// 实际事件日志写入方法/// <paramname="level">要记录信息的级别(error,warning,info,trace)。</param>/// <paramname="messageText">要记录的文本。</param>/// </summary>private static voidWriteLog(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;caseTraceLevel.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:panelstyle="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>
  
  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["BACKGROUND-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"horiz></HEADERSTYLE><ITEMTEMPLATE><ASP:CHECKBOX id="chkExport"runat="server" /></ITEMTEMPLATE><EDITITEMTEMPLATE><ASP:CHECKBOXid="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 oDataGridItem in MyDataGrid.Items)
  { chkExport =(CheckBox)oDataGridItem.FindControl("chkExport");chkExport.Checked= true;} else { foreach(DataGridItem oDataGridItem inMyDataGrid.Items)
  { chkExport =(CheckBox)oDataGridItem.FindControl("chkExport");chkExport.Checked= false;}
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