【C#】常用代码 asp.net
分类:.Net知识问答| 发布:camnprbubuol| 查看: | 发表时间:2010/8/28
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";
- 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.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()
12. 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=’../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....
- }
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?
- <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 = (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 ?
- 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("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("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 :
- 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:
- 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;i<dt.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;
- }
- }
将当前页面中DataGrid1显示的数据全部删除
- 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:
- Application["ConnStr"]=this.Context.Request.PhysicalApplicationPath+ConfigurationSettings.
- AppSettings["ConnStr"].ToString();
3 41. 变量.ToString()
字符型转换 转为字符串
- 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%
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)
- <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>
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:
- 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");
- }
44.datagrid分页中如果删除时出现超出索引
- 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;
- }
- }
- }
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
- /**//// <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值,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类</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>");
- }
47.确认对话框
- /**//// <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值,比如:btn_Flow</param>
- /// <param name="page">Page类</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>");
- }
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
- /**//// <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值</param>
- /// <param name="btn_Redirect_Self">"取消"按钮id值</param>
- /// <param name="page">Page类</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>");
- }
49.获得焦点
- /**//// <summary>
- /// 使控件获得焦点
- /// </summary>
- /// <param name="str_Ctl_Name">获得焦点控件Id值,比如:txt_Name</param>
- /// <param name="page">Page类</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>");
- }
50.子窗体返回主窗体 /
- **////<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>");
- }
- }
51.判断是否为数字
- /**//// <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;
- }
- }
获得字符串实际长度(包括中文字符)
- //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;
- }
51aspx 最后编辑于 2007-12-10 09:37:25
本主题由 董事长 51aspx 于 2008-2-27 13:52:40 执行 移动主题 操作