1、ASP NET程序中常用的三十种代码ASP.NET程序中常用的三十种代码1.打开新的窗口并传送参数: (1) 传送参数: response.write(scriptwindow.open(*.aspx? id=+this.DropDownList1.SelectIndex+&id1=+.+)/script) (2) 接收参数: stringa=Request.QueryString(id); stringb=Request.QueryString(id1);2.为按钮添加对话框 Button1.Attributes.Add(onclick,returnconfirm(确认?);button.a
2、ttributes.add(onclick,if(confirm(are you sure.?)return true;elsereturn false;)3.删除表格选定记录 int intEmpID = (int)MyDataGrid.DataKeyse.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,DataGridItemEventAr
3、gs e) switch(e.Item.ItemType) case ListItemType.Item : case ListItemType.AlternatingItem : case ListItemType.EditItem: TableCell myTableCell; myTableCell = e.Item.Cells14; LinkButton myDeleteButton ; myDeleteButton = (LinkButton)myTableCell.Controls0; myDeleteButton.Attributes.Add(onclick,return con
4、firm(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
5、(Default.aspx?id= + e.Item.Cells0.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.cells1.Text; .e.item.Attributes.Add(ondblclick, location.href=./ShippedGrid.aspx?id= + OrderItemID + );/双击表格打开新
6、一页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 + );特别注意:【?id=】 处不能为 【?id =】6.表格超连接列传递参数asp:HyperLinkColumn Target=_blank headertext=ID号 Da
7、taTextField=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=#9
8、9cc00; 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=defau
9、lt;); 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 在itembound事件中写: 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.TransferRedirect会导致postbac
10、k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。/ 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10.清空CookieCookie.Expires=D
11、ateTime; Response.Cookies(UserName).Expires = 011.自定义异常处理/自定义异常处理类using System; using System.Diagnostics;namespace MyAppException public class AppException:System.ApplicationException public AppException() if (ApplicationConfiguration.EventLogEnabled)LogEvent(出现一个未知错误。); public AppException(string m
12、essage) LogEvent(message); public AppException(string message,Exception innerException) LogEvent(message); if (innerException != null) LogEvent(innerException.Message); 12. Panel 横向滚动,纵向自动扩展 asp:panel style=overflow-x:scroll;overflow-y:auto;/asp:panel13.回车转换成Tab script language=javascript for=docume
13、nt event=onkeydownif(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;/scriptonkeydown=if(event.keyCode=13) event.keyCode=914.DataGrid超级链接列DataNavigateUrlField=
14、字段名 DataNavigateUrlFormatString=http:/xx/delete.aspx?ID=015.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.StyleBACKGROUND-
15、COLOR+); e.Item.Attributes.Add(onmouseover,this.style.backgroundColor=+ #EFF3F7+);16.模板列前台代码: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:TEMP
16、LATECOLUMNASP: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 C
17、heckAll_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
18、 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.
19、DataItem,Company_Ureg_Date)%显示为: 2004-8-11 19:44:28 只想得到:2004-8-11 】%# DataBinder.Eval(Container.DataItem,Company_Ureg_Date,0:yyyy-M-d)%【格式化日期】取出来,一般是object(DateTime)objectFromDB).ToString(yyyy-MM-dd); 【大小写转换】HttpUtility.HtmlEncode(string); HttpUtility.HtmlDecode(string)19.如何设定全局变量Global.asax文件Appli
20、cation_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,21.读取DataGrid控件TextBox值foreach(DataGrid dgi in yourDataGrid.Items) TextBox tb = (TextBox)dgi.
21、FindControl(yourTextBoxId); tb.Text=。22.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中写 page.smartNavigation=true23.在Datagrid中修改数据,当点击编辑键时,数据出现在文本框中,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.I
22、temType=ListItemType.EditType) e.Item.Cellsi.Attributes.Add(Width, 80px); 24.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.co
23、nfirm(+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);25. 将时间格式化:string aa=DateT
24、ime.Now.ToString(yyyy年MM月dd日); (1). 取当前年月日时分秒: currentTime=System.DateTime.Now; (2). 取当前年: int 年= DateTime.Now.Year; (3). 取当前月: int 月= DateTime.Now.Month; (4). 取当前日:int 日= DateTime.Now.Day; (5). 取当前时:int 时= DateTime.Now.Hour; (6). 取当前分:int 分= DateTime.Now.Minute; (7). 取当前秒:int 秒= DateTime.Now.Second
25、;(8). 取当前毫秒:int 毫秒= DateTime.Now.Millisecond;26. 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if(DataGrid1.CurrentPageIndex (DataGrid1.PageCount - 1) /下一页 DataGrid1.CurrentPageIndex += 1; curPageIndex+=1;bind(); / DataGrid1数据绑定函数if(DataGrid1.CurrentPageInd
26、ex 0) /上一页: 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(); / DataGrid1数据绑定函数27DataGrid的使用 (1). 添加删除确认 private void DataGrid1_ItemCreate
27、d() 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(确认删除此项吗?);); (2).样式交替: ListItemType itemType = e.Item.ItemType;if (itemType = ListItemType.Item ) e.I
28、tem.Attributesonmouseout = javascript:this.style.backgroundColor=#FFFFFF; e.Item.Attributesonmouseover = javascript:this.style.backgroundColor=#d9ece1;cursor=hand; ; else if( itemType = ListItemType.AlternatingItem) e.Item.Attributesonmouseout = javascript:this.style.backgroundColor=#a0d7c4; e.Item.
29、Attributesonmouseover = javascript:this.style.backgroundColor=#d9ece1;cursor=hand; ; (3).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.Rowsinumber=(i+1).ToString(); DataGrid1.DataSource=dt; DataGrid1.DataBind(); (4) DataGrid1中添加一个CheckBox,页面中添加一个全选框private void CheckBox2_CheckedChanged(object sen
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