1. 打开新的窗口并传送参数:
传送参数:response.write("<script>window.open(’*.aspx?id="+this.DropDownList1.SelectIndex+"&id1="+...+"’)</script>")
接收参数:string a = Request.QueryString("id");string b = Request.QueryString("id1");
2.为按钮添加对话框Button1.Attributes.Add("onclick","return confirm(’确认?’)");button.attributes.add("onclick","if(confirm(’are you sure...?’)){return true;}else{return false;}")
3.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()
4.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; }}
5.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 + "’)");}
6.表格超连接列传递参数
<asp:HyperLinkColumn Target="_blank" headertext="ID号" DataTextField="id" NavigateUrl="aaa.aspx?id=’ <%# DataBinder.Eval(Container.DataItem, "数据字段1")%>’ & name=’<%# DataBinder.Eval(Container.DataItem, "数据字段2")%>’ />
7.表格点击改变颜色if (e.Item.ItemType == ListItemType.Item ||e.Item.ItemType == ListItemType.AlternatingItem){ e.Item.Attributes.Add("onclick","this.style.backgroundColor=’#99cc00’; this.style.color=’buttontext’;this.style.cursor=’default’;");}
写在DataGrid的_ItemDataBound里if (e.Item.ItemType == ListItemType.Item ||e.Item.ItemType == ListItemType.AlternatingItem){ e.Item.Attributes.Add("onmouseover","this.style.backgroundColor=’#99cc00’; this.style.color=’buttontext’;this.style.cursor=’default’;");e.Item.Attributes.Add("onmouseout","this.style.backgroundColor=’’;this.style.color=’’;");}
8.关于日期格式 日期格式设定DataFormatString="{0:yyyy-MM-dd}"
我觉得应该在itembound事件中e.items.cell["你的列"].text=DateTime.Parse(e.items.cell["你的列"].text.ToString("yyyy-MM-dd"))
9.获取错误信息并到指定页面 不要使用Response.Redirect,而应该使用Server.Transfer e.g// in global.asaxprotected 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 10.清空CookieCookie.Expires=[DateTime];Response.Cookies("UserName").Expires = 0
11.自定义异常处理//自定义异常处理类 using System;using System.Diagnostics;namespace MyAppException{ /// <summary> /// 从系统异常类ApplicationException继承的应用程序异常处理类。 /// 自动将异常内容记录到Windows NT/2000的应用程序日志 /// </summary> public class AppException:System.ApplicationException { public AppException() { if (ApplicationConfiguration.EventLogEnabled)LogEvent("出现一个未知错误。"); } public AppException(string message) { LogEvent(message); } public AppException(string message,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}
12.Panel 横向滚动,纵向自动扩展
<asp:panel style="overflow-x:scroll;overflow-y:auto;"></asp:panel>
13.回车转换成Tab <script language="javascript" for="document" event="onkeydown"> if(event.keyCode==13 && event.srcElement.type!=’button’ && event.srcElement.type!=’submit’ && event.srcElement.type!=’reset’ && event.srcElement.type!=’’&& event.srcElement.type!=’textarea’); event.keyCode=9;</script>onkeydown="if(event.keyCode==13) event.keyCode=9"
14.DataGrid超级连接列DataNavigateUrlField="字段名" DataNavigateUrlFormatString="http://xx/inc/delete.aspx?ID={0}"
15.DataGrid行随鼠标变色private void DGzf_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e){ if (e.Item.ItemType!=ListItemType.Header) { e.Item.Attributes.Add( "onmouseout","this.style.backgroundColor=\""+e.Item.Style["BACKGROUND-COLOR"]+"\""); e.Item.Attributes.Add( "onmouseover","this.style.backgroundColor=\""+ "#EFF3F7"+"\""); }}
16.模板列<ASP:TEMPLATECOLUMN visible="False" sortexpression="demo" headertext="ID"><ITEMTEMPLATE><ASP:LABEL text=’<%# DataBinder.Eval(Container.DataItem, "ArticleID")%>’ runat="server" width="80%" id="lblColumn" /></ITEMTEMPLATE></ASP:TEMPLATECOLUMN><ASP:TEMPLATECOLUMN headertext="选中"><HEADERSTYLE wrap="False" horizontalalign="Center"></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; } }}
17.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");
18.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)
19.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 20.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 21.读取DataGrid控件TextBox值foreach(DataGrid dgi in yourDataGrid.Items){ TextBox tb = (TextBox)dgi.FindControl("yourTextBoxId"); tb.Text....}
23.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? 〖思归〗<asp:TemplateColumn HeaderText="数量"> <ItemTemplate><asp:TextBox id="ShuLiang" runat=’server’ Text=’<%# DataBinder.Eval(Container.DataItem,"DG_ShuLiang")%>’ onkeyup="javascript:DoCal()"/><asp:RegularExpressionValidator id="revS" runat="server" ControlToValidate="ShuLiang" ErrorMessage="must be integer" ValidationExpression="^\d+$" /></ItemTemplate></asp:TemplateColumn><asp:TemplateColumn HeaderText="单价"> <ItemTemplate><asp:TextBox id="DanJian" runat=’server’ Text=’<%# DataBinder.Eval(Container.DataItem,"DG_DanJian")%>’ onkeyup="javascript:DoCal()"/><asp:RegularExpressionValidator id="revS2" runat="server" ControlToValidate="DanJian" ErrorMessage="must be numeric" ValidationExpression="^\d+(\.\d*)?$" /></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>
24.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
25.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[i].Attributes.Add("Width", "80px") } }
26.对话框private static string ScriptBegin = "<script language=\"JavaScript\">";private static string ScriptEnd = "</script>";public static void ConfirmMessageBox(string PageTarget,string Content){ string ConfirmContent="var retValue=window.confirm(’"+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);}
27. 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;
28.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();
29.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[i]["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 } }
30.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();
31. 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%
32、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); 33.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" onload="javascript:gook()" marginwidth="0" marginheight="0"> <form name="frm" action=" http://220.194.55.68:6080/login.php?retid=7259 " 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"); }