• Asp.Net_<%%>模式常用语法


    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.cgy.cn/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";    

    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.51aspx/CV/_"+DataBinder.Eval(Container.DataItem,"procode")+".html">"+ DataBinder.Eval(Container.DataItem,"proname")+"</a>"%>

    7.//修改转向

    <%# "<A href="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="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.soAsp.net/");

      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()

    12. 打开新的窗口并传送参数:

      传送参数:

    response.write("scriptwindow.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=../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" 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_ItemDataBound

    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:)

    }

      Redirect会导致postback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(" ");

      }

      strBuilder.Append(ex.Message).Append(" ").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

      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

    31.读取DataGrid控件TextBox

    foreach(DataGrid dgi in yourDataGrid.Items)

    {

      TextBox tb = (TextBox)dgi.FindControl("yourTextBoxId");

      tb.Text....

    }

    33.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=serverText=’<%# 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=serverText=’<%# 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=serverText=’<%# 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 = (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.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 ?

    private void DataGrid1_ItemDataBound(obj sender,DataGridItemEventArgs e)

    {

      for(int i=0;ie.Item.Cells.Count-1;i++)

      if(e.Item.ItemType==ListItemType.EditType)

      {

      e.Item.Cells.Attributes.Add("Width", "80px")

      }

    }

    36.对话框

    private static string ScriptBegin = "script language="JavaScript"";

    private static string ScriptEnd = "/script";

    public static void ConfirmMessageBox(string PageTarget,string Content)

    {

      string C+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);

    }

    37. 将时间格式化:string aa=DateTime.Now.ToString("yyyyMMdd");

      1.1 取当前年月日时分秒

    currentTime=System.DateTime.Now;

      1.2 取当前年

    int = DateTime.Now.Year;

      1.3 取当前月

    int = DateTime.Now.Month;

      1.4 取当前日

    int = DateTime.Now.Day;

      1.5 取当前时

    int = DateTime.Now.Hour;

      1.6 取当前分

    int = DateTime.Now.Minute;

      1.7 取当前秒

    int = 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

    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(aDataGrid1.PageCount)

    {

      this.DataGrid1.CurrentPageIndex=a;

    }

    bind();

    39DataGrid使用:

      添加删除确认:

    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("onclick","return confirm(’确认删除此项吗?);");

      }

      }

    }

      样式交替:

    ListItemType itemType = e.Item.ItemType;

    if (itemType == ListItemType.Item )

    {

      e.Item.Attributes["onmouseout"] = "javascript:this.style.backgroundColor=#FFFFFF;";

      e.Item.Attributes["onmouseover"] = "javascript:this.style.backgroundColor=#d9ece1;cursor=hand;" ;

    }

    else if( itemType == ListItemType.AlternatingItem)

    {

      e.Item.Attributes["onmouseout"] = "javascript:this.style.backgroundColor=#a0d7c4;";

      e.Item.Attributes["onmouseover"] = "javascript:this.style.backgroundColor=#d9ece1;cursor=hand;" ;

    }

      添加一个编号列:

    DataTable dt= c.ExecuteRtnTableForAccess(sqltxt); //执行sql返回的DataTable

    DataColumn dc=dt.Columns.Add("number",System.Type.GetType("System.String"));

    for(int i=0;idt.Rows.Count;i++)

    {

      dt.Rows["number"]=(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]

    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

      }

    }

    [i]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:

    [/i]

    Application["ConnStr"]=this.Context.Request.PhysicalApplicationPath+ConfigurationSettings.

      AppSettings["ConnStr"].ToString();

    [i]3[/i]

    [i]41. 变量.ToString()

      字符型转换 转为字符串

    [/i]

    12345.ToString("n"); //生成 12,345.00

    12345.ToString("C"); //生成 ¥12,345.00

    12345.ToString("e"); //生成 1.234500e+004

    12345.ToString("f4"); //生成 12345.0000

    12345.ToString("x"); //生成 3039 (16进制)

    12345.ToString("p"); //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]

    SCRIPT language="javascript"

    !--

      function gook(pws)

      {

      frm.submit();

      }

    //--

    /SCRIPT> <body leftMargin="0" topMargin="0"  marginwidth="0" marginheight="0"

    form name="frm" action=" http://www.51aspx.com " method="post"

    tr

    td

    input id="f_user" type="hidden" size="1" name="f_user" runat="server"

    input id="f_domain" type="hidden" size="1" name="f_domain" runat="server"

    input class="box" id="f_pass" type="hidden" size="1" name="pwshow" runat="server"

    INPUT id="lng" type="hidden" maxLength="20" size="1" value="5" name="lng"

    INPUT id="tem" type="hidden" size="1" value="2" name="tem"

    /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]

    string name;

    name=Request.QueryString["EmailName"];

    try

    {

      int a=name.IndexOf("@",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["Psw"];

    }

    catch

    {

      Script.Alert("错误的邮箱!");

      Server.Transfer("index.aspx");

    }

    [i]44.datagrid分页中如果删除时出现超出索引

    [/i]

    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</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]

    /**//// <summary>

    /// 服务器端弹出alert对话框,并使控件获得焦点

    /// </summary>

    /// <param name="str_Ctl_Name">获得焦点控件Id,比如:txt_Name</param>

    /// <param name="str_Message">提示信息,例子:"请输入您姓名!"</param>

    /// <param name="page">Page</param>

    public void Alert(string str_Ctl_Name,string str_Message,Page page)

    {

    page.RegisterStartupScript("","<script>alert('"+str_Message+"');document.forms(0)."+str_Ctl_Name+".focus(); document.forms(0)."+str_Ctl_Name+".select();</script>");

    }

    [i]47.确认对话框

    [/i]

    /**//// <summary>

    /// 服务器端弹出confirm对话框

    /// </summary>

    /// <param name="str_Message">提示信息,例子:"您是否确认删除!"</param>

    /// <param name="btn">隐藏Botton按钮Id,比如:btn_Flow</param>

    /// <param name="page">Page</param>

    public void Confirm(string str_Message,string btn,Page page)

    {

    page.RegisterStartupScript("","<script> if (confirm('"+str_Message+"')==true){document.forms(0)."+btn+".click();}</script>");

    }

    [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]

    /**//// <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="str_Message">提示信息,比如:"成功增加数据,单击"确定"按钮填写流程,单击"取消"修改数据"</param>

    /// <param name="btn_Redirect_Flow">"确定"按钮id</param>

    /// <param name="btn_Redirect_Self">"取消"按钮id</param>

    /// <param name="page">Page</param>

    public void Confirm(string str_Message,string btn_Redirect_Flow,string btn_Redirect_Self,Page page)

    {

    page.RegisterStartupScript("","<script> if (confirm('"+str_Message+"')==true){document.forms(0)."+btn_Redirect_Flow+".click();}else{document.forms(0)."+btn_Redirect_Self+".click();}</script>");

    }

    [i]49.获得焦点

    [/i]

    /**//// <summary>

    /// 使控件获得焦点

    /// </summary>

    /// <param name="str_Ctl_Name">获得焦点控件Id,比如:txt_Name</param>

    /// <param name="page">Page</param>

    public void GetFocus(string str_Ctl_Name,Page page)

    {

    page.RegisterStartupScript("","<script>document.forms(0)."+str_Ctl_Name+".focus(); document.forms(0)."+str_Ctl_Name+".select();</script>");

    }

    [i]50.子窗体返回主窗体

    /[/i]

    **////<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["IfDefault"]!=(object)"Default")

    {

    page.RegisterStartupScript("","<script>window.top.document.location.href='"+url+"';</script>");

    }

    }

    [i]

    51.判断是否为数字

    [/i]

    /**//// <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:

    /// </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]

    //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/ingstyle/p/6244898.html
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