ASP.NET程序中常用代码汇总(三)
ASP.NET程序中常用代码汇总(三) 21.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22.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23.读取DataGrid控件TextBox值 foreach(DataGrid dgi in yourDataGrid.Items){TextBox tb = (TextBox)dgi.FindControl('yourTextBoxId');tb.Text.}24.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')%>’ 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>25.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
26.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')} }27.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);}28.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;29.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(); 30.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 } }