ASPNET程序中常用的三十三種代碼

1、ASP.NET程序中常用的三十三種代碼(收集)1打開(kāi)新的窗口并傳送參數(shù)：12為按鈕添加對(duì)話框23刪除表格選定記錄24刪除表格記錄警告25點(diǎn)擊表格行鏈接另一頁(yè)36表格超連接列傳遞參數(shù)37表格點(diǎn)擊改變顏色48關(guān)于日期格式49獲取錯(cuò)誤信息并到指定頁(yè)面410清空Cookie511自定義異常處理512Panel 橫向滾動(dòng)，縱向自動(dòng)擴(kuò)展913回車轉(zhuǎn)換成Tab914DataGrid超級(jí)連接列915DataGrid行隨鼠標(biāo)變色916模板列1017數(shù)字格式化1118日期格式化1119如何設(shè)定全局變量1220怎樣作到HyperLinkColumn生成的連接后，點(diǎn)擊連接，打開(kāi)新窗口？1221讀取DataGrid控件

2、TextBox值1323自動(dòng)模板列計(jì)算：在錄入數(shù)量及單價(jià)的時(shí)候自動(dòng)算出金額1324datagrid選定比較底下的行時(shí)，為什么總是刷新一下，然后就滾動(dòng)到了最上面，剛才選定的行因屏幕的關(guān)系就看不到了。1425在Datagrid中修改數(shù)據(jù)，當(dāng)點(diǎn)擊編輯鍵時(shí)，數(shù)據(jù)出現(xiàn)在文本框中，怎么控制文本框的大小 ?1426對(duì)話框1527將時(shí)間格式化：string aa=DateTime.Now.ToString("yyyy年MM月dd日");1528自定義分頁(yè)代碼：1629DataGrid使用：1630當(dāng)文件在不同目錄下，需要獲取數(shù)據(jù)庫(kù)連接字符串（如果連接字符串放在Web.config，然后在G

3、lobal.asax中初始化）1831變量.ToString()1832變量.Substring(參數(shù)1,參數(shù)2);1933在自己的網(wǎng)站上登陸其他網(wǎng)站：(如果你的頁(yè)面是通過(guò)嵌套方式的話，因?yàn)橐粋€(gè)頁(yè)面只能有一個(gè)FORM，這時(shí)可以導(dǎo)向另外一個(gè)頁(yè)面再提交登陸信息)191打開(kāi)新的窗口并傳送參數(shù)： 傳送參數(shù)：response.write("scriptwindow.open(*.aspx?id="+this.DropDownList1.SelectIndex+"&id1="+.+")/script"); /response.write(

4、"");接收參數(shù)：string a = Request.QueryString("id");string b = Request.QueryString("id1");2為按鈕添加對(duì)話框Button1.Attributes.Add("onclick","return confirm(確認(rèn)?)");button.attributes.add("onclick","if(confirm(are you sure.?)return true;elsereturn fals

5、e;")3刪除表格選定記錄int intEmpID = (int)MyDataGrid.DataKeyse.Item.ItemIndex; /e參見(jiàn)下一例string deleteCmd = "DELETE from Employee where emp_id = " + intEmpID.ToString()4刪除表格記錄警告private void DataGrid_ItemCreated(Object sender,DataGridItemEventArgs e)switch(e.Item.ItemType)case ListItemType.Item :c

6、ase ListItemType.AlternatingItem :case ListItemType.EditItem:TableCell myTableCell;myTableCell = e.Item.Cells14;LinkButton myDeleteButton ;myDeleteButton = (LinkButton)myTableCell.Controls0;myDeleteButton.Attributes.Add("onclick","return confirm(您是否確定要?jiǎng)h除這條信息);");break;default:bre

7、ak;5點(diǎn)擊表格行鏈接另一頁(yè)private void grdCustomer_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)/點(diǎn)擊表格打開(kāi)if (e.Item.ItemType = ListItemType.Item | e.Item.ItemType = ListItemType.AlternatingItem)e.Item.Attributes.Add("onclick","window.open(Default.aspx?id=" + e

8、.Item.Cells0.Text + ");");雙擊表格連接到另一頁(yè)在itemDataBind事件中if(e.Item.ItemType = ListItemType.Item | e.Item.ItemType = ListItemType.AlternatingItem)string OrderItemID =e.item.cells1.Text;.e.item.Attributes.Add("ondblclick", "location.href=./ShippedGrid.aspx?id=" + OrderItemID +

9、 "");雙擊表格打開(kāi)新一頁(yè)if(e.Item.ItemType = ListItemType.Item | e.Item.ItemType = ListItemType.AlternatingItem)string OrderItemID =e.item.cells1.Text;.e.item.Attributes.Add("ondblclick", "open(./ShippedGrid.aspx?id=" + OrderItemID + ")");6表格超連接列傳遞參數(shù)asp:HyperLinkColumn

10、Target="_blank" headertext="ID號(hào)" DataTextField="id" NavigateUrl="aaa.aspx?id=%# DataBinder.Eval(Container.DataItem, "數(shù)據(jù)字段1")% & name=%# DataBinder.Eval(Container.DataItem, "數(shù)據(jù)字段2")% /7表格點(diǎn)擊改變顏色if (e.Item.ItemType = ListItemType.Item |e.Item.I

11、temType = ListItemType.AlternatingItem) e.Item.Attributes.Add("onclick","this.style.backgroundColor=#99cc00; this.style.color=buttontext;this.style.cursor=default;"); 寫(xiě)在DataGrid的_ItemDataBound里if (e.Item.ItemType = ListItemType.Item |e.Item.ItemType = ListItemType.AlternatingItem

12、)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關(guān)于日期格式日期格式設(shè)定DataFormatString="0:yyyy-MM

13、-dd"我覺(jué)得應(yīng)該在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獲取錯(cuò)誤信息并到指定頁(yè)面不要使用Response.Redirect,而應(yīng)該使用Server.Transfere.g/ in global.asaxprotected void Application_Error(Object sender, EventArgs e) if (Server.GetLastError()

14、 is HttpUnhandledException)Server.Transfer("MyErrorPage.aspx");/其余的非HttpUnhandledException異常交給ASP.NET自己處理就okay了 :)Redirect會(huì)導(dǎo)致postback的產(chǎn)生從而丟失了錯(cuò)誤信息，所以頁(yè)面導(dǎo)向應(yīng)該直接在服務(wù)器端執(zhí)行，這樣就可以在錯(cuò)誤處理頁(yè)面得到出錯(cuò)信息并進(jìn)行相應(yīng)的處理 10清空CookieCookie.Expires=DateTime;Response.Cookies("UserName").Expires = 011自定義異常處理/自定義異常

15、處理類 using System;using System.Diagnostics;namespace MyAppException/ summary/ 從系統(tǒng)異常類ApplicationException繼承的應(yīng)用程序異常處理類。/ 自動(dòng)將異常內(nèi)容記錄到Windows NT/2000的應(yīng)用程序日志/ /summarypublic class AppException:System.ApplicationExceptionpublic AppException()if (ApplicationConfiguration.EventLogEnabled)LogEvent("出現(xiàn)一個(gè)未知

16、錯(cuò)誤。");public AppException(string message)LogEvent(message);public AppException(string message,Exception innerException)LogEvent(message);if (innerException != null)LogEvent(innerException.Message);/日志記錄類using System;using System.Configuration;using System.Diagnostics;using System.IO;using Syste

17、m.Text;using System.Threading;namespace MyEventLog/ summary/ 事件日志記錄類，提供事件日志記錄支持 / remarks/ 定義了4個(gè)日志記錄方法 (error, warning, info, trace) / /remarks/ /summarypublic class ApplicationLog/ summary/ 將錯(cuò)誤信息記錄到Win2000/NT事件日志中/ param name="message"需要記錄的文本信息/param/ /summarypublic static void WriteError

18、(String message)WriteLog(TraceLevel.Error, message);/ summary/ 將警告信息記錄到Win2000/NT事件日志中/ param name="message"需要記錄的文本信息/param/ /summarypublic static void WriteWarning(String message)WriteLog(TraceLevel.Warning, message);/ summary/ 將提示信息記錄到Win2000/NT事件日志中/ param name="message"需要記錄的文

19、本信息/param/ /summarypublic static void WriteInfo(String message)WriteLog(TraceLevel.Info, message);/ summary/ 將跟蹤信息記錄到Win2000/NT事件日志中/ param name="message"需要記錄的文本信息/param/ /summarypublic static void WriteTrace(String message)WriteLog(TraceLevel.Verbose, message);/ summary/ 格式化記錄到事件日志的文本信息格式

20、/ param name="ex"需要格式化的異常對(duì)象/param/ param name="catchInfo"異常信息標(biāo)題字符串./param/ retvalue/ para格式后的異常信息字符串，包括異常內(nèi)容和跟蹤堆棧./para/ /retvalue/ /summarypublic static String FormatException(Exception ex, String catchInfo)StringBuilder strBuilder = new StringBuilder();if (catchInfo != String.Em

21、pty)strBuilder.Append(catchInfo).Append("rn"); /相似于Java中的StringBufferstrBuilder.Append(ex.Message).Append("rn").Append(ex.StackTrace);return strBuilder.ToString();/ summary/ 實(shí)際事件日志寫(xiě)入方法/ param name="level"要記錄信息的級(jí)別（error,warning,info,trace)./param/ param name="messag

22、eText"要記錄的文本./param/ /summaryprivate 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 TraceLev

23、el.Info:LogEntryType = EventLogEntryType.Information;break;case TraceLevel.Verbose:LogEntryType = EventLogEntryType.SuccessAudit;break;default:LogEntryType = EventLogEntryType.SuccessAudit;break;EventLog eventLog = new EventLog("Application", ApplicationConfiguration.EventLogMachineName, A

24、pplicationConfiguration.EventLogSourceName );/寫(xiě)入事件日志eventLog.WriteEntry(messageText, LogEntryType);catch /忽略任何異常 /class ApplicationLog12Panel 橫向滾動(dòng)，縱向自動(dòng)擴(kuò)展asp:panel style="overflow-x:scroll;overflow-y:auto;"/asp:panel13回車轉(zhuǎn)換成Tab event.keyCode = 13 是回車；event.keyCode = 9 是換行。script language=&qu

25、ot;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) e

26、vent.keyCode=9;/scriptonkeydown="if(event.keyCode=13) event.keyCode = 9"14DataGrid超級(jí)連接列DataNavigateUrlField="字段名" DataNavigateUrlFormatString="http:/xx/inc/delete.aspx?ID=0" /這里應(yīng)該是通配符15DataGrid行隨鼠標(biāo)變色private void DGzf_ItemDataBound(object sender, System.Web.UI.WebControl

27、s.DataGridItemEventArgs e)if (e.Item.ItemType != ListItemType.Header)e.Item.Attributes.Add( "onmouseout","this.style.backgroundColor=""+e.Item.Style"BACKGROUND-COLOR"+"""); /鼠標(biāo)移出 e.Item.Attributes.Add( "onmouseover","this.style.backgro

28、undColor=""+ "#EFF3F7"+"""); /鼠標(biāo)移入16模板列ASP:TEMPLATECOLUMN visible="False" sortexpression="demo" headertext="ID"ITEMTEMPLATEASP:LABEL text=%# DataBinder.Eval(Container.DataItem, "ArticleID")% runat="server" width=&qu

29、ot;80%" id="lblColumn" /ITEMTEMPLATE/ASP:TEMPLATECOLUMNASP:TEMPLATECOLUMN headertext="選中"HEADERSTYLE wrap="False" horizontalalign="Center"/HEADERSTYLEITEMTEMPLATEASP:CHECKBOX id="chkExport" runat="server" /ITEMTEMPLATEEDITITEMTEMPLATEA

30、SP:CHECKBOX id="chkExportON" runat="server" enabled="true" /EDITITEMTEMPLATE/ASP:TEMPLATECOLUMN后臺(tái)代碼protected void CheckAll_CheckedChanged(object sender, System.EventArgs e)/改變列的選定，實(shí)現(xiàn)全選或全不選。CheckBox chkExport ;if( CheckAll.Checked)foreach(DataGridItem oDataGridItem in My

31、DataGrid.Items)chkExport = (CheckBox)oDataGridItem.FindControl("chkExport");chkExport.Checked = true;elseforeach(DataGridItem oDataGridItem in MyDataGrid.Items)chkExport = (CheckBox)oDataGridItem.FindControl("chkExport");chkExport.Checked = false;17數(shù)字格式化【%#Container.DataItem(&quo

32、t;price")%的結(jié)果是500.0000，怎樣格式化為500.00?】%#Container.DataItem("price","0:￥#,#0.00")%int i=123456;string s=i.ToString("#,#.00");18日期格式化【aspx頁(yè)面內(nèi)：%# DataBinder.Eval(Container.DataItem,"Company_Ureg_Date")%顯示為： 2004-8-11 19:44:28我只想要：2004-8-11 】%# DataBinder.Eval

33、(Container.DataItem,"Company_Ureg_Date","0:yyyy-M-d")%應(yīng)該如何改？【格式化日期】取出來(lái),一般是object(DateTime)objectFromDB).ToString("yyyy-MM-dd");【日期的驗(yàn)證表達(dá)式】A.以下正確的輸入格式： 2004-2-29, 2004-02-29 10:29:39 pm, 2004/12/31 (d2(02468048)|(1357926)-/s?(0?13578)|(102)-/s?(0?1-9)|(1-20-9)|(301)|(0?46

34、9)|(11)-/s?(0?1-9)|(1-20-9)|(30)|(0?2-/s?(0?1-9)|(1-20-9)|(d2(024681235679)|(1357901345789)-/s?(0?13578)|(102)-/s?(0?1-9)|(1-20-9)|(301)|(0?469)|(11)-/s?(0?1-9)|(1-20-9)|(30)|(0?2-/s?(0?1-9)|(10-9)|(20-8)(s(0?1-9)|(10-2):(0-50-9)(s)|(:(0-50-9)s)(AM|PM|am|pm2,2)?$B.以下正確的輸入格式：0001-12-31, 9999 09 30, 2

35、002/03/03 d4-/s?(013578)|(102)-/s?(0-20-9)|(301)|(0469)|(11)-/s?(0-20-9)|(30)|(02-/s?0-20-9)$ 【大小寫(xiě)轉(zhuǎn)換】HttpUtility.HtmlEncode(string);HttpUtility.HtmlDecode(string);19如何設(shè)定全局變量Global.asax中Application_Start()事件中添加Application屬性名 xxx;就是你的全局變量20怎樣做到HyperLinkColumn生成的連接后，點(diǎn)擊連接，打開(kāi)新窗口？HyperLinkColumn有個(gè)屬性Target

36、,將其值設(shè)置成"_blank"即可.(Target="_blank")【ASPNETMENU】點(diǎn)擊菜單項(xiàng)彈出新窗口在你的menuData.xml文件的菜單項(xiàng)中加入U(xiǎn)RLTarget="_blank"，如：?xml version="1.0" encoding="GB2312"?MenuData ImagesBaseURL="images/" MenuGroupMenuItem Label="內(nèi)參信息" URL="Infomation.aspx&q

37、uot; MenuGroup ID="BBC"MenuItem Label="公告信息" URL="Infomation.aspx" URLTarget="_blank" LeftIcon="file.gif"/MenuItem Label="編制信息簡(jiǎn)報(bào)" URL="NewInfo.aspx" LeftIcon="file.gif" /.最好將你的aspnetmenu升級(jí)到1.2版21讀取DataGrid控件TextBox值forea

38、ch(DataGrid dgi in yourDataGrid.Items)TextBox tb = (TextBox)dgi.FindControl("yourTextBoxId");tb.Text.23自動(dòng)模板列計(jì)算：在錄入數(shù)量及單價(jià)的時(shí)候自動(dòng)算出金額在DataGrid中有3個(gè)模板列包含Textbox分別為 DG_ShuLiang (數(shù)量) DG_DanJian(單價(jià)) DG_JinE(金額)分別在5.6.7列，要求在錄入數(shù)量及單價(jià)的時(shí)候自動(dòng)算出金額即:數(shù)量*單價(jià)=金額還要求錄入時(shí)限制為 數(shù)值型.我如何用客戶端腳本實(shí)現(xiàn)這個(gè)功能?思?xì)wasp:TemplateColumn

39、HeaderText="數(shù)量" ItemTemplateasp:TextBox id="ShuLiang" runat=server Text=%# DataBinder.Eval(Container.DataItem,"DG_ShuLiang")% onkeyup="javascript:DoCal()"/asp:RegularExpressionValidator id="revS" runat="server" ControlToValidate="ShuLi

40、ang" ErrorMessage="must be integer" ValidationExpression="d+$" /ItemTemplate/asp:TemplateColumnasp:TemplateColumn HeaderText="單價(jià)" ItemTemplateasp:TextBox id="DanJian" runat=server Text=%# DataBinder.Eval(Container.DataItem,"DG_DanJian")% onkeyup

41、="javascript:DoCal()"/asp:RegularExpressionValidator id="revS2" runat="server" ControlToValidate="DanJian" ErrorMessage="must be numeric" ValidationExpression="d+(.d*)?$" /ItemTemplate/asp:TemplateColumnasp:TemplateColumn HeaderText="金

42、額" ItemTemplateasp:TextBox id="JinE" runat=server Text=%# DataBinder.Eval(Container.DataItem,"DG_JinE")% /ItemTemplate/asp:TemplateColumnscript language="javascript"function DoCal()var e = event.srcElement;var row = e.parentNode.parentNode;var txts = row.all.tags(&

43、quot;INPUT");if (!txts.length | txts.length 3)return;var q = txtstxts.length-3.value;var p = txtstxts.length-2.value;if (isNaN(q) | isNaN(p)return;q = parseInt(q);p = parseFloat(p);txtstxts.length-1.value = (q * p).toFixed(2);/script24datagrid選定比較底下的行時(shí)，為什么總是刷新一下，然后就滾動(dòng)到了最上面，剛才選定的行因屏幕的關(guān)系就看不到了。pag

44、e_load page.smartNavigation=true25在Datagrid中修改數(shù)據(jù)，當(dāng)點(diǎn)擊編輯鍵時(shí)，數(shù)據(jù)出現(xiàn)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.Cellsi.Attributes.Add("Width", "80px") 26對(duì)話

45、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+");"+&quo

46、t;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將時(shí)間格式化：string aa=

47、DateTime.Now.ToString("yyyy年MM月dd日"); 1.1 取當(dāng)前年月日時(shí)分秒 currentTime=System.DateTime.Now;1.2 取當(dāng)前年 int 年= DateTime.Now.Year;1.3 取當(dāng)前月 int 月= DateTime.Now.Month; 1.4 取當(dāng)前日 int 日= DateTime.Now.Day; 1.5 取當(dāng)前時(shí) int 時(shí)= DateTime.Now.Hour; 1.6 取當(dāng)前分 int 分= DateTime.Now.Minute; 1.7 取當(dāng)前秒 int 秒= DateTime.Now.S

48、econd; 1.8 取當(dāng)前毫秒 int 毫秒= DateTime.Now.Millisecond; 28自定義分頁(yè)代碼：先定義變量 ：public static int pageCount; /總頁(yè)面數(shù) public static int curPageIndex=1; /當(dāng)前頁(yè)面 下一頁(yè)： if(DataGrid1.CurrentPageIndex (DataGrid1.PageCount - 1) DataGrid1.CurrentPageIndex += 1; curPageIndex+=1; bind(); / DataGrid1數(shù)據(jù)綁定函數(shù) 上一頁(yè)： if(DataGrid1.Cu

49、rrentPageIndex 0) DataGrid1.CurrentPageIndex += 1; curPageIndex-=1; bind(); / DataGrid1數(shù)據(jù)綁定函數(shù) 直接頁(yè)面跳轉(zhuǎn)： int a=int.Parse(JumpPage.Value.Trim();/JumpPage.Value.Trim()為跳轉(zhuǎn)值 if(aDataGrid1.PageCount) this.DataGrid1.CurrentPageIndex=a; bind(); 29DataGrid使用： 添加刪除確認(rèn)： private void DataGrid1_ItemCreated(object s

50、ender, System.Web.UI.WebControls.DataGridItemEventArgs e) foreach(DataGridItem di in this.DataGrid1.Items) if(di.ItemType=ListItemType.Item|di.ItemType=ListItemType.AlternatingItem) (LinkButton)di.Cells8.Controls0).Attributes.Add("onclick","return confirm(確認(rèn)刪除此項(xiàng)嗎?);"); 樣式交替： List

51、ItemType 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( it

52、emType = ListItemType.AlternatingItem) e.Item.Attributes"onmouseout" = "javascript:this.style.backgroundColor=#a0d7c4;" e.Item.Attributes"onmouseover" = "javascript:this.style.backgroundColor=#d9ece1;cursor=hand;" ; 添加一個(gè)編號(hào)列： DataTable dt= c.ExecuteRtnTableForA

53、ccess(sqltxt); /執(zhí)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.Rowsi"number"=(i+1).ToString(); DataGrid1.DataSource=dt; DataGrid1.DataBind(); DataGrid1中添加一個(gè)CheckBox，頁(yè)面中添加一個(gè)全選框 private void

54、CheckBox2_CheckedChanged(object sender, System.EventArgs e) foreach(DataGridItem thisitem in DataGrid1.Items) (CheckBox)thisitem.Cells0.Controls1).Checked=CheckBox2.Checked; 將當(dāng)前頁(yè)面中DataGrid1顯示的數(shù)據(jù)全部刪除 foreach(DataGridItem thisitem in DataGrid1.Items) if(CheckBox)thisitem.Cells0.Controls1).Checked) str

55、ing strloginid= DataGrid1.DataKeysthisitem.ItemIndex.ToString(); Del (strloginid); /刪除函數(shù) 30當(dāng)文件在不同目錄下，需要獲取數(shù)據(jù)庫(kù)連接字符串（如果連接字符串放在Web.config，然后在Global.asax中初始化） 在Application_Start中添加以下代碼： Application"ConnStr"=this.Context.Request.PhysicalApplicationPath+ConfigurationSettings.AppSettings"ConnStr".ToString();31變量.ToString() 字符型轉(zhuǎn)換 轉(zhuǎn)