• 非常实用]Asp.net常用的51个代码


    非常实用]Asp.net常用的51个代码       

    1.//弹出对话框.点击转向指定页面


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


    2.//弹出对话框


    CODE:
    Response.Write(&quot;<script language='javascript'>alert('产品添加成功!')</script >&quot;);


    3.//删除文件


    CODE:
    string filename =&quot;20059595157517.jpg&quot;;
    pub.util.DeleteFile(HttpContext.Current.Server.MapPath(&quot;../file/&quot;)+filename);


    4.//绑定下拉列表框datalist


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


    5.//时间去秒显示


    CODE:
    <%# System.DateTime.Parse(DataBinder.Eval(Container.DataItem,&quot;begtime&quot;).ToString()).ToShortDateString()%>


    6.//标题带链接


    CODE:
    <%# &quot;<a class=/&quot;12c/&quot; target=/&quot;_blank/&quot; href=/&quot;http://www.51aspx/CV/_&quot;+DataBinder.Eval(Container.DataItem,&quot;procode&quot;)+&quot;.html/&quot;>&quot;+ DataBinder.Eval(Container.DataItem,&quot;proname&quot;)+&quot;</a>&quot;%>


    7.//修改转向


    CODE:
    <%# &quot;<A href=/&quot;editpushpro.aspx?id=&quot;+DataBinder.Eval(Container.DataItem,&quot;code&quot;)+&quot;/&quot;>&quot;+&quot;修改&quot;+&quot;</A>&quot;%>


    8.//弹出确定按钮


    CODE:
    <%# &quot;<A id=/&quot;btnDelete/&quot; onclick=/&quot;return confirm('你是否确定删除这条记录吗?');/&quot; href=/&quot;pushproduct.aspx?dl=&quot;+DataBinder.Eval(Container.DataItem,&quot;code&quot;)+&quot;/&quot;>&quot;+&quot;删除&quot;+&quot;</A>&quot;%>


    9.//输出数据格式化 "{0:F2}" 是格式 F2表示小数点后剩两位


    CODE:
    <%# DataBinder.Eval(Container, &quot;DataItem.PriceMoney&quot;,&quot;{0:F2}&quot;) %>


    10.//提取动态网页内容


    CODE:
    Uri uri = new Uri(&quot;http://www.51aspx.com/&quot;);
      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


    CODE:
    i.ToString().Trim().Substring(i.ToString().Trim().LastIndexOf(&quot;.&quot;)+1).ToLower().Trim()


    12. 打开新的窗口并传送参数:

    传送参数:


    CODE:
    response.write(&quot;<script>window.open(’*.aspx?id=&quot;+this.DropDownList1.SelectIndex+&quot;&amp;id1=&quot;+...+&quot;’)</script>&quot;)


    接收参数:


    CODE:
    string a = Request.QueryString(&quot;id&quot;);
    string b = Request.QueryString(&quot;id1&quot;);


    12.为按钮添加对话框


    CODE:
    Button1.Attributes.Add(&quot;onclick&quot;,&quot;return confirm(’确认?’)&quot;);
    button.attributes.add(&quot;onclick&quot;,&quot;if(confirm(’are you sure...?’)){return true;}else{return false;}&quot;)


    13.删除表格选定记录


    CODE:
    int intEmpID = (int)MyDataGrid.DataKeys[e.Item.ItemIndex];
    string deleteCmd = &quot;Delete from Employee where emp_id = &quot; + intEmpID.ToString()


    14.删除表格记录警告


    CODE:
    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(&quot;onclick&quot;,&quot;return confirm(’您是否确定要删除这条信息’);&quot;);
      break;
      default:
      break;
      }
    }


    15.点击表格行链接另一页


    CODE:
    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(&quot;onclick&quot;,&quot;window.open(’Default.aspx?id=&quot; + e.Item.Cells[0].Text + &quot;’);&quot;);
    }


    双击表格连接到另一页
      在itemDataBind事件中


    CODE:
    if(e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
    {
      string orderItemID =e.item.cells[1].Text;
      e.item.Attributes.Add(&quot;ondblclick&quot;, &quot;location.href=’../ShippedGrid.aspx?id=&quot; + orderItemID + &quot;’&quot;);
    }


    双击表格打开新一页


    CODE:
    if(e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
    {
      string orderItemID =e.item.cells[1].Text;
      e.item.Attributes.Add(&quot;ondblclick&quot;, &quot;open(’../ShippedGrid.aspx?id=&quot; + orderItemID + &quot;’)&quot;);
    }


    16.表格超连接列传递参数


    CODE:
    <asp:HyperLinkColumn Target=&quot;_blank&quot; headertext=&quot;ID号&quot; DataTextField=&quot;id&quot; NavigateUrl=&quot;aaa.aspx?id=’
      <%# DataBinder.Eval(Container.DataItem, &quot;数据字段1&quot;)%>’ &amp; name=’<%# DataBinder.Eval(Container.DataItem, &quot;数据字段2&quot;)%>’ />


    17.表格点击改变颜色


    CODE:
    if (e.Item.ItemType == ListItemType.Item ||e.Item.ItemType == ListItemType.AlternatingItem)
    {
      e.Item.Attributes.Add(&quot;onclick&quot;,&quot;this.style.backgroundColor=’#99cc00’;
        this.style.color=’buttontext’;this.style.cursor=’default’;&quot;);
    }


    写在DataGrid的_ItemDataBound里


    CODE:
    if (e.Item.ItemType == ListItemType.Item ||e.Item.ItemType == ListItemType.AlternatingItem)
    {
    e.Item.Attributes.Add(&quot;onmouseover&quot;,&quot;this.style.backgroundColor=’#99cc00’;
      this.style.color=’buttontext’;this.style.cursor=’default’;&quot;);
    e.Item.Attributes.Add(&quot;onmouseout&quot;,&quot;this.style.backgroundColor=’’;this.style.color=’’;&quot;);
    }


    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


    CODE:
    // in global.asax
    protected void Application_Error(Object sender, EventArgs e) {
    if (Server.GetLastError() is HttpUnhandledException)
    Server.Transfer(&quot;MyErrorPage.aspx&quot;);


    //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


    CODE:
    Cookie.Expires=[DateTime];
    Response.Cookies(&quot;UserName&quot;).Expires = 0


    21.自定义异常处理


    CODE:
    //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(&quot;出现一个未知错误。&quot;);
      }
      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=&quot;message&quot;>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=&quot;message&quot;>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=&quot;message&quot;>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=&quot;message&quot;>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=&quot;ex&quot;>需要格式化的异常对象</param>
      /// <param name=&quot;catchInfo&quot;>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(&quot;/r/n&quot;);
      }
      strBuilder.Append(ex.Message).Append(&quot;/r/n&quot;).Append(ex.StackTrace);
      return strBuilder.ToString();
      }
      /// <summary>
      /// 实际事件日志写入方法
      /// <param name=&quot;level&quot;>要记录信息的级别(error,warning,info,trace).</param>
      /// <param name=&quot;messageText&quot;>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(&quot;Application&quot;, 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


    CODE:
    <asp:panel style=&quot;overflow-x:scroll;overflow-y:auto;&quot;></asp:panel>


    23.回车转换成Tab
    (1)


    CODE:
    <script language=&quot;javascript&quot; for=&quot;document&quot; event=&quot;onkeydown&quot;>
      if(event.keyCode==13 &amp;&amp; event.srcElement.type!=’button’ &amp;&amp; event.srcElement.type!=’submit’ &amp;&amp;     event.srcElement.type!=’reset’ &amp;&amp; event.srcElement.type!=’’&amp;&amp; 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


    CODE:
    public void Tab(System.Web .UI.WebControls .WebControl webcontrol)
    {
    webcontrol.Attributes .Add (&quot;onkeydown&quot;, &quot;if(event.keyCode==13) event.keyCode=9&quot;);
    }


    24.DataGrid超级连接列
    DataNavigateUrlField=&quot;字段名&quot; DataNavigateUrlFormatString=&quot;http://xx/inc/delete.aspx?ID={0}&quot;


    25.DataGrid行随鼠标变色


    CODE:
    private void DGzf_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
    {
      if (e.Item.ItemType!=ListItemType.Header)
      {
      e.Item.Attributes.Add( &quot;onmouseout&quot;,&quot;this.style.backgroundColor=/&quot;&quot;+e.Item.Style[&quot;BACKGROUND-COLOR&quot;]+&quot;/&quot;&quot;);
      e.Item.Attributes.Add( &quot;onmouseover&quot;,&quot;this.style.backgroundColor=/&quot;&quot;+ &quot;#EFF3F7&quot;+&quot;/&quot;&quot;);
      }
    }


    26.模板列


    CODE:
    <ASP:TEMPLATECOLUMN visible=&quot;False&quot; sortexpression=&quot;demo&quot; headertext=&quot;ID&quot;>
    <ITEMTEMPLATE>
    <ASP LABEL text=’<%# DataBinder.Eval(Container.DataItem, &quot;ArticleID&quot;)%>’ runat=&quot;server&quot; width=&quot;80%&quot; id=&quot;lblColumn&quot; />
    </ITEMTEMPLATE>
    </ASP:TEMPLATECOLUMN>
    <ASP:TEMPLATECOLUMN headertext=&quot;选中&quot;>
    <HEADERSTYLE wrap=&quot;False&quot; horiz></HEADERSTYLE>
    <ITEMTEMPLATE>
    <ASP:CHECKBOX id=&quot;chkExport&quot; runat=&quot;server&quot; />
    </ITEMTEMPLATE>
    <EDITITEMTEMPLATE>
    <ASP:CHECKBOX id=&quot;chkExportON&quot; runat=&quot;server&quot; enabled=&quot;true&quot; />
    </EDITITEMTEMPLATE>
    </ASP:TEMPLATECOLUMN>


    后台代码


    CODE:
    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(&quot;chkExport&quot;);
      chkExport.Checked = true;
      }
      }
      else
      {
      foreach(DataGridItem oDataGridItem in MyDataGrid.Items)
      {
      chkExport = (CheckBox)oDataGridItem.FindControl(&quot;chkExport&quot;);
      chkExport.Checked = false;
      }
      }
    }


    27.数字格式化


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


    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:


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


    最好将你的aspnetmenu升级到1.2版


    31.读取DataGrid控件TextBox值


    CODE:
    foreach(DataGrid dgi in yourDataGrid.Items)
    {
      TextBox tb = (TextBox)dgi.FindControl(&quot;yourTextBoxId&quot;);
      tb.Text....
    }


    33.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?


    CODE:
    <asp:TemplateColumn HeaderText=&quot;数量&quot;>
    <ItemTemplate>
    <asp:TextBox id=&quot;ShuLiang&quot; runat=’server’ Text=’<%# DataBinder.Eval(Container.DataItem,&quot;DG_ShuLiang&quot;)%>’

    />
    <asp:RegularExpressionValidator id=&quot;revS&quot; runat=&quot;server&quot; C ErrorMessage=&quot;must be integer&quot; Validati />
    </ItemTemplate>
    </asp:TemplateColumn>
    <asp:TemplateColumn HeaderText=&quot;单价&quot;>
    <ItemTemplate>
    <asp:TextBox id=&quot;DanJian&quot; runat=’server’ Text=’<%# DataBinder.Eval(Container.DataItem,&quot;DG_DanJian&quot;)%>’

    />
    <asp:RegularExpressionValidator id=&quot;revS2&quot; runat=&quot;server&quot; C ErrorMessage=&quot;must be numeric&quot; Validati />
    </ItemTemplate>
    </asp:TemplateColumn>
    <asp:TemplateColumn HeaderText=&quot;金额&quot;>
    <ItemTemplate>
    <asp:TextBox id=&quot;JinE&quot; runat=’server’ Text=’<%# DataBinder.Eval(Container.DataItem,&quot;DG_JinE&quot;)%>’ />
    </ItemTemplate>
    </asp:TemplateColumn><script language=&quot;javascript&quot;>
    function DoCal()
    {
      var e = event.srcElement;
      var row = e.parentNode.parentNode;
      var txts = row.all.tags(&quot;INPUT&quot;);
      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 = (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


    35.在Datagrid中修改数据,当点击编辑键时,数据出现在文本框中,怎么控制文本框的大小 ?


    CODE:
    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.Attributes.Add(&quot;Width&quot;, &quot;80px&quot;)
      }
    }


    36.对话框

    CODE:
    private static string ScriptBegin = &quot;<script language=/&quot;JavaScript/&quot;>&quot;;
    private static string ScriptEnd = &quot;</script>&quot;;
    public static void ConfirmMessageBox(string PageTarget,string Content)
    {
      string C+Content+&quot;’);&quot;+&quot;if(retValue){window.location=’&quot;+PageTarget+&quot;’;}&quot;;
      ConfirmContent=ScriptBegin + ConfirmContent + ScriptEnd;
      Page ParameterPage = (Page)System.Web.HttpContext.Current.Handler;
      ParameterPage.RegisterStartupScript(&quot;confirm&quot;,ConfirmContent);
      //Response.Write


    (strScript);
    }


    37. 将时间格式化:string aa=DateTime.Now.ToString("yyyy年MM月dd日");


      1.1 取当前年月日时分秒
    currentTime=System.DateTime.Now;
      1.2 取当前年
    int 年= DateTime.Now.Year;
      1.3 取当前月
    int 月= DateTime.Now.Month;
      1.4 取当前日
    int 日= DateTime.Now.Day;
      1.5 取当前时
    int 时= DateTime.Now.Hour;
      1.6 取当前分
    int 分= DateTime.Now.Minute;
      1.7 取当前秒
    int 秒= DateTime.Now.Second;
      1.8 取当前毫秒
    int 毫秒= DateTime.Now.Millisecond;
    38.自定义分页代码:
      先定义变量 :

    CODE:
    public static int pageCount; //总页面数
    public static int curPageIndex=1; //当前页面
      下一页:
    if(DataGrid1.CurrentPageIndex < (DataGrid1.PageCount - 1))
    {
      DataGrid1.CurrentPageIndex += 1;
      curPageIndex+=1;
    }
    bind(); // DataGrid1数据绑定函数
      上一页:
    if(DataGrid1.CurrentPageIndex >0)
    {
      DataGrid1.CurrentPageIndex += 1;
      curPageIndex-=1;
    }
    bind(); // DataGrid1数据绑定函数
      直接页面跳转:
    int a=int.Parse(JumpPage.Value.Trim());//JumpPage.Value.Trim()为跳转值
    if(a<DataGrid1.PageCount)
    {
      this.DataGrid1.CurrentPageIndex=a;
    }
    bind();


    39.DataGrid使用:


      添加删除确认:

    CODE:
    private void DataGrid1_ItemCreated(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
    {
      foreach(DataGridItem di in this.DataGrid1.Items)
      {
      if(di.ItemType==ListItemType.Item||di.ItemType==ListItemType.AlternatingItem)
      {
      ((LinkButton)di.Cells[8].Controls[0]).Attributes.Add(&quot;onclick&quot;,&quot;return confirm(’确认删除此项吗?’);&quot;);
      }
      }
    }


      样式交替:

    CODE:
    ListItemType itemType = e.Item.ItemType;
    if (itemType == ListItemType.Item )
    {
      e.Item.Attributes[&quot;onmouseout&quot;] = &quot;javascript:this.style.backgroundColor=’#FFFFFF’;&quot;;
      e.Item.Attributes[&quot;onmouseover&quot;] = &quot;javascript:this.style.backgroundColor=’#d9ece1’;cursor=’hand’;&quot; ;
    }
    else if( itemType == ListItemType.AlternatingItem)
    {
      e.Item.Attributes[&quot;onmouseout&quot;] = &quot;javascript:this.style.backgroundColor=’#a0d7c4’;&quot;;
      e.Item.Attributes[&quot;onmouseover&quot;] = &quot;javascript:this.style.backgroundColor=’#d9ece1’;cursor=’hand’;&quot; ;
    }


      添加一个编号列:

    CODE:
    DataTable dt= c.ExecuteRtnTableForAccess(sqltxt); //执行sql返回的DataTable
    DataColumn dc=dt.Columns.Add(&quot;number&quot;,System.Type.GetType(&quot;System.String&quot;));
    for(int i=0;i<dt.Rows.Count;i++)
    {
      dt.Rows[&quot;number&quot;]=(i+1).ToString();
    }
    DataGrid1.DataSource=dt;
    DataGrid1.DataBind();
      DataGrid1中添加一个CheckBox,页面中添加一个全选框
    private void CheckBox2_CheckedChanged(object sender, System.EventArgs e)
    {
      foreach(DataGridItem thisitem in DataGrid1.Items)
      {
      ((CheckBox)thisitem.Cells[0].Controls[1]).Checked=CheckBox2.Checked;
      }
    }


    [i]  将当前页面中DataGrid1显示的数据全部删除
    [/i]


    CODE:
    foreach(DataGridItem thisitem in DataGrid1.Items)
    {
      if(((CheckBox)thisitem.Cells[0].Controls[1]).Checked)
      {
      string strloginid= DataGrid1.DataKeys[thisitem.ItemIndex].ToString();
      Del (strloginid); //删除函数
      }
    }


    40.当文件在不同目录下,需要获取数据库连接字符串(如果连接字符串放在Web.config,然后在Global.asax中初始化)

      在Application_Start中添加以下代码:


    CODE:
    Application[&quot;ConnStr&quot;]=this.Context.Request.PhysicalApplicationPath+ConfigurationSettings.
      AppSettings[&quot;ConnStr&quot;].ToString();


    [i]3[/i]
    [i]41. 变量.ToString()
      字符型转换 转为字符串
    [/i]


    CODE:
    12345.ToString(&quot;n&quot;); //生成 12,345.00
    12345.ToString(&quot;C&quot;); //生成 ¥12,345.00
    12345.ToString(&quot;e&quot;); //生成 1.234500e+004
    12345.ToString(&quot;f4&quot;); //生成 12345.0000
    12345.ToString(&quot;x&quot;); //生成 3039 (16进制)
    12345.ToString(&quot;p&quot;); //生成 1,234,500.00%


    [i]42、变量.Substring(参数1,参数2);
      截取字串的一部分,参数1为左起始位数,参数2为截取几位。 如:string s1 = str.Substring(0,2);
    43.在自己的网站上登陆其他网站:(如果你的页面是通过嵌套方式的话,因为一个页面只能有一个FORM,这时可以导向另外一个页面再提交登陆信息)
    [/i]


    CODE:
    <SCRIPT language=&quot;javascript&quot;>
    <!--
      function gook(pws)
      {
      frm.submit();
      }
    //-->
    </SCRIPT> <body leftMargin=&quot;0&quot; topMargin=&quot;0&quot;  marginwidth=&quot;0&quot; marginheight=&quot;0&quot;>
    <form name=&quot;frm&quot; action=&quot; http://www.51aspx.com &quot; method=&quot;post&quot;>
    <tr>
    <td>
    <input id=&quot;f_user&quot; type=&quot;hidden&quot; size=&quot;1&quot; name=&quot;f_user&quot; runat=&quot;server&quot;>
    <input id=&quot;f_domain&quot; type=&quot;hidden&quot; size=&quot;1&quot; name=&quot;f_domain&quot; runat=&quot;server&quot;>
    <input class=&quot;box&quot; id=&quot;f_pass&quot; type=&quot;hidden&quot; size=&quot;1&quot; name=&quot;pwshow&quot; runat=&quot;server&quot;>
    <INPUT id=&quot;lng&quot; type=&quot;hidden&quot; maxLength=&quot;20&quot; size=&quot;1&quot; value=&quot;5&quot; name=&quot;lng&quot;>
    <INPUT id=&quot;tem&quot; type=&quot;hidden&quot; size=&quot;1&quot; value=&quot;2&quot; name=&quot;tem&quot;>
    </td>
    </tr>
    </form>


    [i]  文本框的名称必须是你要登陆的网页上的名称,如果源码不行可以用vsniffer 看看。
      下面是获取用户输入的登陆信息的代码:
    [/i]


    CODE:
    string name;
    name=Request.QueryString[&quot;EmailName&quot;];
    try
    {
      int a=name.IndexOf(&quot;@&quot;,0,name.Length);
      f_user.Value=name.Substring(0,a);
      f_domain.Value=name.Substring(a+1,name.Length-(a+1));
      f_pass.Value=Request.QueryString[&quot;Psw&quot;];
    }
    catch
    {
      Script.Alert(&quot;错误的邮箱!&quot;);
      Server.Transfer(&quot;index.aspx&quot;);
    }


    [i]44.datagrid分页中如果删除时出现超出索引
    [/i]


    CODE:
    public void jumppage(System.Web.UI.WebControls.DataGrid dg)
    {
    int int_PageLess; //定义页面跳转的页数
    //如果当前页是最后一页
    if(dg.CurrentPageIndex == dg.PageCount-1)
    {
    //如果就只有一页
    if(dg.CurrentPageIndex == 0)
    {
    //删除后页面停在当前页
    dg.CurrentPageIndex = dg.PageCount-1;
    }
    else
    {
    //如果最后一页只有一条记录
    if((dg.Items.Count % dg.PageSize == 1) || dg.PageSize == 1)
    {
    //把最后一页最后一条记录删除后,页面应跳转到前一页
    int_PageLess = 2;
    }
    else //如果最后一页的记录数大于1,那么在最后一页删除记录后仍然停在当前页
    {
    int_PageLess = 1;
    }
    dg.CurrentPageIndex = dg.PageCount - int_PageLess;
    }
    }
    }


    [i]45.警告窗口


    /**//// <summary>
    /// 服务器端弹出alert对话框
    /// </summary>
    /// <param name="str_Message">提示信息,例子:"不能为空!"</param>
    /// <param name="page">Page类</param>
    public void Alert(string str_Message,Page page)
    {
    page.RegisterStartupScript("","<script>alert('"+str_Message+"');</script>");
    }
    36.重载此警告窗口,使某控件获得焦点
    [/i]


    CODE:
    /**//// <summary>
    /// 服务器端弹出alert对话框,并使控件获得焦点
    /// </summary>
    /// <param name=&quot;str_Ctl_Name&quot;>获得焦点控件Id值,比如:txt_Name</param>
    /// <param name=&quot;str_Message&quot;>提示信息,例子:&quot;请输入您姓名!&quot;</param>
    /// <param name=&quot;page&quot;>Page类</param>
    public void Alert(string str_Ctl_Name,string str_Message,Page page)
    {
    page.RegisterStartupScript(&quot;&quot;,&quot;<script>alert('&quot;+str_Message+&quot;');document.forms(0).&quot;+str_Ctl_Name+&quot;.focus(); document.forms(0).&quot;+str_Ctl_Name+&quot;.select();</script>&quot;);
    }


    [i]47.确认对话框
    [/i]


    CODE:
    /**//// <summary>
    /// 服务器端弹出confirm对话框
    /// </summary>
    /// <param name=&quot;str_Message&quot;>提示信息,例子:&quot;您是否确认删除!&quot;</param>
    /// <param name=&quot;btn&quot;>隐藏Botton按钮Id值,比如:btn_Flow</param>
    /// <param name=&quot;page&quot;>Page类</param>
    public void Confirm(string str_Message,string btn,Page page)
    {
    page.RegisterStartupScript(&quot;&quot;,&quot;<script> if (confirm('&quot;+str_Message+&quot;')==true){document.forms(0).&quot;+btn+&quot;.click();}</script>&quot;);
    }


    [i]48.重载确认对话框,点击确定触发一个隐藏按钮事件,点击取消触发一个隐藏按钮事件
    [/i]


    CODE:
    /**//// <summary>
    /// 服务器端弹出confirm对话框,询问用户准备转向那些操作,包括“确定”和“取消”时的操作
    /// </summary>
    /// <param name=&quot;str_Message&quot;>提示信息,比如:&quot;成功增加数据,单击/&quot;确定/&quot;按钮填写流程,单击/&quot;取消/&quot;修改数据&quot;</param>
    /// <param name=&quot;btn_Redirect_Flow&quot;>&quot;确定&quot;按钮id值</param>
    /// <param name=&quot;btn_Redirect_Self&quot;>&quot;取消&quot;按钮id值</param>
    /// <param name=&quot;page&quot;>Page类</param>
    public void Confirm(string str_Message,string btn_Redirect_Flow,string btn_Redirect_Self,Page page)
    {
    page.RegisterStartupScript(&quot;&quot;,&quot;<script> if (confirm('&quot;+str_Message+&quot;')==true){document.forms(0).&quot;+btn_Redirect_Flow+&quot;.click();}else{document.forms(0).&quot;+btn_Redirect_Self+&quot;.click();}</script>&quot;);
    }


    [i]49.获得焦点
    [/i]


    CODE:
    /**//// <summary>
    /// 使控件获得焦点
    /// </summary>
    /// <param name=&quot;str_Ctl_Name&quot;>获得焦点控件Id值,比如:txt_Name</param>
    /// <param name=&quot;page&quot;>Page类</param>
    public void GetFocus(string str_Ctl_Name,Page page)
    {
    page.RegisterStartupScript(&quot;&quot;,&quot;<script>document.forms(0).&quot;+str_Ctl_Name+&quot;.focus(); document.forms(0).&quot;+str_Ctl_Name+&quot;.select();</script>&quot;);
    }


    [i]50.子窗体返回主窗体
    /[/i]


    CODE:
    **////<summary>
    ///名称:redirect
    ///功能:子窗体返回主窗体
    ///参数:url
    ///返回值:空
    ///</summary>
    public void redirect(string url,Page page)
    {
    if ( Session[&quot;IfDefault&quot;]!=(object)&quot;Default&quot;)
    {
    page.RegisterStartupScript(&quot;&quot;,&quot;<script>window.top.document.location.href='&quot;+url+&quot;';</script>&quot;);
    }
    }


    [i]
    51.判断是否为数字
    [/i]


    CODE:
    /**//// <summary>
    /// 名称:IsNumberic
    /// 功能:判断输入的是否是数字
    /// 参数:string oText:源文本
    /// 返回值: bool true:是 false:否
    /// </summary>
    public bool IsNumberic(string oText)
    {
    try
    {
    int var1=Convert.ToInt32 (oText);
    return true;
    }
    catch
    {
    return false;
    }
    }


    [i]获得字符串实际长度(包括中文字符)
    [/i]


    CODE:
    //获得字符串oString的实际长度
    public int StringLength(string oString)
    {
    byte[] strArray=System.Text .Encoding.Default .GetBytes (oString);
    int res=strArray.Length ;
    return res;
    }

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  • 原文地址:https://www.cnblogs.com/wangyhua/p/4050666.html
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