ASP.NET程序中常用的三十三種代碼
傳送參數:
response.write("<script>window.open(’*.aspx?id="+this.DropDownList1.SelectIndex+"&id1="+...+"’)</script>") |
string a = Request.QueryString("id"); string b = Request.QueryString("id1"); |
Button1.Attributes.Add("onclick","return confirm(’確認?’)"); button.attributes.add("onclick","if(confirm(’are you sure...?’)){return true;}else{return false;}") |
int intEmpID = (int)MyDataGrid.DataKeys[e.Item.ItemIndex]; string deleteCmd = "DELETE from Employee where emp_id = " + intEmpID.ToString() |
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(’您是否確定要刪除這條信息’);"); break; default: break; } } |
private void grdCustomer_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e) { //點擊表格打開 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 + "’);"); } |
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 + "’"); } |
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 + "’)"); } |
<asp:HyperLinkColumn Target="_blank" headertext="ID號" DataTextField="id" NavigateUrl="aaa.aspx?id=’ <%# DataBinder.Eval(Container.DataItem, "數據字段1")%>’ & name=’<%# DataBinder.Eval(Container.DataItem, "數據字段2")%>’ /> |
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’;"); } |
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=’’;"); } |
日期格式設定
DataFormatString="{0:yyyy-MM-dd}" |
e.items.cell["你的列"].text=DateTime.Parse(e.items.cell["你的列"].text.ToString("yyyy-MM-dd")) |
不要使用Response.Redirect,而應該使用Server.Transfer
e.g
// in global.asax protected void Application_Error(Object sender, EventArgs e) { if (Server.GetLastError() is HttpUnhandledException) Server.Transfer("MyErrorPage.aspx"); //其餘的非HttpUnhandledException異常交給ASP.NET自己處理就okay了 :) } |
10.清空Cookie
Cookie.Expires=[DateTime]; Response.Cookies("UserName").Expires = 0 |
//自定義異常處理類 using System; using System.Diagnostics; namespace MyAppException { /// <summary> /// 從系統異常類ApplicationException繼承的應用程序異常處理類。 /// 自動將異常內容記錄到Windows NT/2000的應用程序日誌 /// </summary> public class AppException:System.ApplicationException { public AppException() { if (ApplicationConfiguration.EventLogEnabled)LogEvent("出現一個未知錯誤。"); } public AppException(string message) { LogEvent(message); } public AppException(string message,Exception innerException) { LogEvent(message); if (innerException != null) { LogEvent(innerException.Message); } } //日誌記錄類 using System; using System.Configuration; using System.Diagnostics; using System.IO; using System.Text; using System.Threading; namespace MyEventLog { /// <summary> /// 事件日誌記錄類,提供事件日誌記錄支持 /// <remarks> /// 定義了4個日誌記錄方法 (error, warning, info, trace) /// </remarks> /// </summary> public class ApplicationLog { /// <summary> /// 將錯誤信息記錄到Win2000/NT事件日誌中 /// <param name="message">需要記錄的文本信息</param> /// </summary> public static void WriteError(String message) { WriteLog(TraceLevel.Error, message); } /// <summary> /// 將警告信息記錄到Win2000/NT事件日誌中 /// <param name="message">需要記錄的文本信息</param> /// </summary> public static void WriteWarning(String message) { WriteLog(TraceLevel.Warning, message); } /// <summary> /// 將提示信息記錄到Win2000/NT事件日誌中 /// <param name="message">需要記錄的文本信息</param> /// </summary> public static void WriteInfo(String message) { WriteLog(TraceLevel.Info, message); } /// <summary> /// 將跟蹤信息記錄到Win2000/NT事件日誌中 /// <param name="message">需要記錄的文本信息</param> /// </summary> public static void WriteTrace(String message) { WriteLog(TraceLevel.Verbose, message); } /// <summary> /// 格式化記錄到事件日誌的文本信息格式 /// <param name="ex">需要格式化的異常對象</param> /// <param name="catchInfo">異常信息標題字符串.</param> /// <retvalue> /// <para>格式後的異常信息字符串,包括異常內容和跟蹤堆棧.</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> /// 實際事件日誌寫入方法 /// <param name="level">要記錄信息的級別(error,warning,info,trace).</param> /// <param name="messageText">要記錄的文本.</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 ); //寫入事件日誌 eventLog.WriteEntry(messageText, LogEntryType); } catch {} //忽略任何異常 } } //class ApplicationLog } |
<asp:panel style="overflow-x:scroll;overflow-y:auto;"></asp:panel> |
<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> |
DataNavigateUrlField="字段名" DataNavigateUrlFormatString="http://xx/inc/delete.aspx?ID={0}" |
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"+"/""); } } |
<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="選中"> <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> |
protected void CheckAll_CheckedChanged(object sender, System.EventArgs e) { //改變列的選定,實現全選或全不選。 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; } } } |
【<%#Container.DataItem("price")%>的結果是500.0000,怎樣格式化爲500.00?】
<%#Container.DataItem("price","{0:¥#,##0.00}")%> int i=123456; string s=i.ToString("###,###.00"); |
【aspx頁面內:<%# DataBinder.Eval(Container.DataItem,"Company_Ureg_Date")%>
顯示爲: 2004-8-11 19:44:28
我只想要:2004-8-11 】
<%# DataBinder.Eval(Container.DataItem,"Company_Ureg_Date","{0:yyyy-M-d}")%> |
【格式化日期】
取出來,一般是object((DateTime)objectFromDB).ToString("yyyy-MM-dd");
【日期的驗證表達式】
A.以下正確的輸入格式: [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})))?$ |
^/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]))$ |
HttpUtility.HtmlEncode(string); HttpUtility.HtmlDecode(string) |
Global.asax中
Application_Start()事件中
添加Application[屬性名] = xxx;
就是你的全局變量
20.怎樣作到HyperLinkColumn生成的連接後,點擊連接,打開新窗口?
HyperLinkColumn有個屬性Target,將器值設置成"_blank"即可.(Target="_blank")
【ASPNETMENU】點擊菜單項彈出新窗口
在你的menuData.xml文件的菜單項中加入URLTarget="_blank",如:
<?xml version="1.0" encoding="GB2312"?> <MenuData ImagesBaseURL="images/"> <MenuGroup> <MenuItem Label="內參信息" URL="Infomation.aspx" > <MenuGroup ID="BBC"> <MenuItem Label="公告信息" URL="Infomation.aspx" URLTarget="_blank" LeftIcon="file.gif"/> <MenuItem Label="編制信息簡報" URL="NewInfo.aspx" LeftIcon="file.gif" /> ...... |
21.讀取DataGrid控件TextBox值
foreach(DataGrid dgi in yourDataGrid.Items) { TextBox tb = (TextBox)dgi.FindControl("yourTextBoxId"); tb.Text.... } |
〖思歸〗
<asp:TemplateColumn HeaderText="數量"> <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="單價"> <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="金額"> <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> |
page_load page.smartNavigation=true |
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") } } |
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); } |
1.1 取當前年月日時分秒
currentTime=System.DateTime.Now; |
int 年= DateTime.Now.Year; |
int 月= DateTime.Now.Month; |
int 日= DateTime.Now.Day; |
int 時= DateTime.Now.Hour; |
int 分= DateTime.Now.Minute; |
int 秒= DateTime.Now.Second; |
int 毫秒= DateTime.Now.Millisecond; |
先定義變量 :
public static int pageCount; //總頁面數 public static int curPageIndex=1; //當前頁面 |
if(DataGrid1.CurrentPageIndex < (DataGrid1.PageCount - 1)) { DataGrid1.CurrentPageIndex += 1; curPageIndex+=1; } bind(); // DataGrid1數據綁定函數 |
if(DataGrid1.CurrentPageIndex >0) { DataGrid1.CurrentPageIndex += 1; curPageIndex-=1; } bind(); // DataGrid1數據綁定函數 |
int a=int.Parse(JumpPage.Value.Trim());//JumpPage.Value.Trim()爲跳轉值 if(a<DataGrid1.PageCount) { this.DataGrid1.CurrentPageIndex=a; } bind(); |
添加刪除確認:
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(’確認刪除此項嗎?’);"); } } } |
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’;" ; } |
DataTable dt= c.ExecuteRtnTableForAccess(sqltxt); //執行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(); |
private void CheckBox2_CheckedChanged(object sender, System.EventArgs e) { foreach(DataGridItem thisitem in DataGrid1.Items) { ((CheckBox)thisitem.Cells[0].Controls[1]).Checked=CheckBox2.Checked; } } |
foreach(DataGridItem thisitem in DataGrid1.Items) { if(((CheckBox)thisitem.Cells[0].Controls[1]).Checked) { string strloginid= DataGrid1.DataKeys[thisitem.ItemIndex].ToString(); Del (strloginid); //刪除函數 } } |
在Application_Start中添加以下代碼:
Application["ConnStr"]=this.Context.Request.PhysicalApplicationPath+ConfigurationSettings. AppSettings["ConnStr"].ToString(); |
字符型轉換 轉爲字符串
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進制) 12345.ToString("p"); //生成 1,234,500.00% |
截取字串的一部分,參數1爲左起始位數,參數2爲截取幾位。 如:string s1 = str.Substring(0,2);
33.在自己的網站上登陸其他網站:(如果你的頁面是通過嵌套方式的話,因爲一個頁面只能有一個FORM,這時可以導向另外一個頁面再提交登陸信息)
<SCRIPT language="javascript"> <!-- function gook(pws) { frm.submit(); } //--> </SCRIPT> <body leftMargin="0" topMargin="0" marginwidth="0" marginheight="0"> <form name="frm" action=" http://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> |
下面是獲取用戶輸入的登陸信息的代碼:
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("錯誤的郵箱!"); Server.Transfer("index.aspx"); } |