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Asp.net常用的三十多个代码(非常实用


 

1.//弹出对话框.点击转向指定页面

Response.Write("<script>window.alert(‘该会员没有提交申请,请重新提交!‘)</script>");Response.Write("<script>window.location =‘http://www.51aspx.com/bizpulic/upmeb.aspx‘</script>");

2.//弹出对话框

Response.Write("<script language=‘javascript‘>alert(‘产品添加成功!‘)</script >");

3.//删除文件

string filename ="20059595157517.jpg";pub.util.DeleteFile(HttpContext.Current.Server.MapPath("../file/")+filename);

4.//绑定下拉列表框datalist

System.Data.DataView dv=conn.Exec_ex("select -1 as code,‘请选择经营模式‘ as content from dealin union select code,content from dealin");this.dealincode.DataSource=dv;this.dealincode.DataTextField="content"; //this.dealincode.DataValueField="code";    //id this.dealincode.DataBind();this.dealincode.Items.FindByValue(dv[0]["dealincode"].ToString()).Selected=true;

5.//时间去秒显示

<%# System.DateTime.Parse(DataBinder.Eval(Container.DataItem,"begtime").ToString()).ToShortDateString

6.//标题带链接

<%# "<a class=\"12c\" target=\"_blank\" href=http://www.mamicode.com/"">"+ DataBinder.Eval(Container.DataItem,"proname")+"</a>"%>

7.//修改转向

<%# "<A href=http://www.mamicode.com/"editpushpro.aspx?id="+DataBinder.Eval(Container.DataItem,"code")+"\">"+"修改"+"</A>"%>

8.//弹出确定按钮

<%# "<A id=\"btnDelete\" onclick=\"return confirm(‘你是否确定删除这条记录吗?‘);\" href=http://www.mamicode.com/"pushproduct.aspx?dl="+DataBinder.Eval(Container.DataItem,"code")+" \">"+"删除"+"</A>"%>

9.//输出数据格式化 "{0:F2}" 是格式 F2表示小数点后剩两位

<%# DataBinder.Eval(Container, "DataItem.PriceMoney","{0:F2}") %>

10.//提取动态网页内容

Uri uri = new Uri("http://www.51aspx.com/");WebRequest req = WebRequest.Create(uri);WebResponse resp = req.GetResponse();Stream str = resp.GetResponseStream();StreamReader sr = new StreamReader(str,System.Text.Encoding.Default);string t = sr.ReadToEnd();this.Response.Write(t.ToString());

11.//获取" . "后面的字符

i.ToString().Trim().Substring(i.ToString().Trim().LastIndexOf(".")+1).ToLower().Trim()  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");


 12.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;}")

13.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()

14.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;  } }

15.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=http://www.mamicode.com/‘../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 + "‘)"); }

16.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")%> />

17.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=‘‘;"); }

18.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"))

19.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() is HttpUnhandledException) 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

20.清空Cookie

Cookie.Expires=[DateTime]; Response.Cookies("UserName").Expires = 0

21.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(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 }

22.Panel 横向滚动,纵向自动扩展

<asp:panel style="overflow-x:scroll;overflow-y:auto;"></asp:panel>

23.回车转换成Tab 

(1)

 <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>


(2)

 //当在有keydown事件的控件上敲回车时,变为tab public void Tab(System.Web .UI.WebControls .WebControl webcontrol)  {  webcontrol.Attributes .Add ("onkeydown", "if(event.keyCode==13) event.keyCode=9");  }

24.DataGrid超级连接列

DataNavigateUrlField="字段名" DataNavigateUrlFormatString="http://xx/inc/delete.aspx?ID={0}"

25.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"+"\"");  } }

26.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: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。   CheckBox chkExport ;  if( CheckAll.Checked)  {  foreach(DataGridItem oDataGridItem in MyDataGrid.Items)  {  chkExport = (CheckBox)oDataGridItem.FindControl("chkExport");  chkExport.Checked = true;  }  }  else  {  foreach(DataGridItem oDataGridItem in MyDataGrid.Items)  {  chkExport = (CheckBox)oDataGridItem.FindControl("chkExport");  chkExport.Checked = false;  }  } }

27.数字格式化

【<%#Container.DataItem("price")%>的结果是500.0000,怎样格式化为500.00?<%#Container.DataItem("price","{0:¥#,##0.00}")%> int i=123456; string s=i.ToString("###,###.00");

28.日期格式化

 

  【aspx页面内:<%# DataBinder.Eval(Container.DataItem,"Company_Ureg_Date")%>  显示为: 2004-8-11 19:44:28  我只想要:2004-8-11<%# DataBinder.Eval(Container.DataItem,"Company_Ureg_Date","{0:yyyy-M-d}")%>  应该如何改?   【格式化日期】   取出来,一般是object((DateTime)objectFromDB).ToString("yyyy-MM-dd");  【日期的验证表达式】   A.以下正确的输入格式: [2004-2-29], [2004-02-29 10:29:39 pm], [2004/12/31]  ^((\d{2}(([02468][048])|([13579][26]))[\-\/\s]?((((0?[13578])|(1[02]))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\-\/\s]?((0?[1-9])|([1-2][0-9])))))|(\d{2}(([02468][1235679])|([13579][01345789]))[\-\/\s]?((((0?[13578])|(1[02]))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\-\/\s]?((0?[1-9])|(1[0-9])|(2[0-8]))))))(\s(((0?[1-9])|(1[0-2]))\:([0-5][0-9])((\s)|(\:([0-5][0-9])\s))([AM|PM|am|pm]{2,2})))?$  B.以下正确的输入格式:[0001-12-31], [9999 09 30], [2002/03/03]  ^\d{4}[\-\/\s]?((((0[13578])|(1[02]))[\-\/\s]?(([0-2][0-9])|(3[01])))|(((0[469])|(11))[\-\/\s]?(([0-2][0-9])|(30)))|(02[\-\/\s]?[0-2][0-9]))$   【大小写转换】HttpUtility.HtmlEncode(string); HttpUtility.HtmlDecode(string)

29.如何设定全局变量

Global.asax中
  Application_Start()事件中
  添加Application[属性名] = xxx;
  就是你的全局变量

30.怎样作到HyperLinkColumn生成的连接后,点击连接,打开新窗口?

HyperLinkColumn有个属性Target,将器值设置成"_blank"即可.(Target="_blank")
  【ASPNETMENU】点击菜单项弹出新窗口
  在你的menuData.xml文件的菜单项中加入URLTarget="_blank",如:

<?xml version="1.0" encoding="GB2312"?> <MenuData ImagesBaseURL="images/">  <MenuGroup> <MenuItem Label="内参信息" URL="Infomation.aspx" > <MenuGroup ID="BBC"> <MenuItem Label="公告信息" URL="Infomation.aspx" URLTarget="_blank" LeftIcon="file.gif"/> <MenuItem Label="编制信息简报" URL="NewInfo.aspx" LeftIcon="file.gif" />

最好将你的aspnetmenu升级到1.2版

31.读取DataGrid控件TextBox值

foreach(DataGrid dgi in yourDataGrid.Items) {  TextBox tb = (TextBox)dgi.FindControl("yourTextBoxId");  tb.Text.... }


32. 在DataGrid中有3个模板列包含Textbox分别为 DG_ShuLiang (数量) DG_DanJian(单价) DG_JinE(金额)分别在5.6.7列,要求在录入数量及单价的时候自动算出金额即:数量*单价=金额还要求录入时限制为 数值型.我如何用客户端脚本实现这个功能?

 <asp:TemplateColumn HeaderText="数量">  <ItemTemplate> <asp:TextBox id="ShuLiang" runat=server Text=<%# DataBinder.Eval(Container.DataItem,"DG_ShuLiang")%>  /> <asp:RegularExpressionValidator id="revS" runat="server" C ErrorMessage="must be integer" Validati /> </ItemTemplate> </asp:TemplateColumn> <asp:TemplateColumn HeaderText="单价">  <ItemTemplate> <asp:TextBox id="DanJian" runat=server Text=<%# DataBinder.Eval(Container.DataItem,"DG_DanJian")%>  /> <asp:RegularExpressionValidator id="revS2" runat="server" C ErrorMessage="must be numeric" Validati /> </ItemTemplate> </asp:TemplateColumn> <asp:TemplateColumn HeaderText="金额">  <ItemTemplate> <asp:TextBox id="JinE" runat=server Text=<%# DataBinder.Eval(Container.DataItem,"DG_JinE")%> /> </ItemTemplate> </asp:TemplateColumn><script language="javascript"> function DoCal() {  var e = event.srcElement;  var row = e.parentNode.parentNode;  var txts = row.all.tags("INPUT");  if (!txts.length || txts.length < 3)  return;  var q = txts[txts.length-3].value;  var p = txts[txts.length-2].value;  if (isNaN(q) || isNaN(p))  return;  q = parseInt(q);  p = parseFloat(p);  txts[txts.length-1].value = http://www.mamicode.com/(q * p).toFixed(2); } </script>

34.datagrid选定比较底下的行时,为什么总是刷新一下,然后就滚动到了最上面,刚才选定的行因屏幕的关系就看不到了。

page_load page.smartNavigation=true;


在网上碰巧看到的:http://blog.csdn.net/xb12369/article/details/7719026

 

Asp.net常用的三十多个代码(非常实用