以下为控件的主要部分 (ui 部分)
通知使用基于合成的实现的服务器控件创建它们包含的任何子控件，以便为回发或呈现做准备。
protected overrides sub createchildcontrols()sub createchildcontrols()
controls.clear() labpageinfo = new label() labpageinfotext_01 = new label labpageinfotext_01.text = "每页" txtpagesize = new textbox txtpagesize.id = "txtpagesize" txtpagesize.width = 66 labpageinfotext_02 = new label labpageinfotext_02.text = "条记录" labpageinfotext_03 = new label labpageinfotext_03.text = "转到" labpageinfotext_04 = new label labpageinfotext_04.text = "页" txtpageindex = new textbox txtpageindex.id = "txtpageindex" txtpageindex.width = 66 ibgotopage = new imagebutton ibgotopage.id = "ibgotopage" ibgotopage.width = 60 ibgotopage.height = 20 addhandler ibgotopage.click, addressof ibgotopage_click lbgotopage = new linkbutton lbgotopage.id = "lbgotopage" lbgotopage.text = "转到" addhandler lbgotopage.click, addressof lbgotopage_click lbfirstpage = new linkbutton lbfirstpage.id = "lbfirstpage" lbfirstpage.text = "首页" addhandler lbfirstpage.click, addressof lbfirstpage_click lbprevpage = new linkbutton lbprevpage.id = "lbprevpage" lbprevpage.text = "上页" addhandler lbprevpage.click, addressof lbprevpage_click lbnextpage = new linkbutton lbnextpage.id = "lbnextpage" lbnextpage.text = "下页" addhandler lbnextpage.click, addressof lbnextpage_click lblastpage = new linkbutton lblastpage.id = "lblastpage" lblastpage.text = "末页" addhandler lblastpage.click, addressof lblastpage_click me.controls.add(labpageinfo) me.controls.add(labpageinfotext_01) me.controls.add(txtpagesize) me.controls.add(labpageinfotext_02) me.controls.add(labpageinfotext_03) me.controls.add(txtpageindex) me.controls.add(ibgotopage) me.controls.add(lbgotopage) me.controls.add(lbfirstpage) me.controls.add(lbprevpage) me.controls.add(lbnextpage) me.controls.add(lblastpage)
end sub重写控件的输出。
protected overrides sub render()sub render(byval writer as htmltextwriter) addattributestorender(writer) writer.addattribute(htmltextwriterattribute.cellpadding, "1", false) writer.addattribute(htmltextwriterattribute.width, "100%", false) writer.renderbegintag(htmltextwritertag.table) writer.renderbegintag(htmltextwritertag.tr) writer.renderbegintag(htmltextwritertag.td) writer.addstyleattribute(htmltextwriterstyle.width, "50%") labpageinfo.text = "共 " & recordcount & "条记录 共 " & pagecount & " 页 当前第" & currentpageindex & "页" labpageinfo.rendercontrol(writer) writer.renderendtag() writer.renderbegintag(htmltextwritertag.td) writer.addstyleattribute(htmltextwriterstyle.width, "50%") labpageinfotext_01.rendercontrol(writer) writer.writeline(" ") txtpagesize.rendercontrol(writer) writer.writeline(" ") labpageinfotext_02.rendercontrol(writer) writer.writeline(" ") if gotostyle = stylegoto.imagebutton then labpageinfotext_03.rendercontrol(writer) else lbgotopage.rendercontrol(writer) end if writer.writeline(" ") txtpageindex.rendercontrol(writer) writer.writeline(" ") labpageinfotext_04.rendercontrol(writer) if gotostyle = stylegoto.imagebutton then ibgotopage.attributes.add("onmouseover", "this.src=" + hoverimageurl + ";") ibgotopage.attributes.add("onmouseout", "this.src=" + defaultimageurl + ";") ibgotopage.attributes.add("onmousedown", "this.src=" + pressedimageurl + ";") ibgotopage.rendercontrol(writer) end if writer.writeline(" ") lbfirstpage.rendercontrol(writer) writer.writeline(" ") lbprevpage.rendercontrol(writer) writer.writeline(" ") lbnextpage.rendercontrol(writer) writer.writeline(" ") lblastpage.rendercontrol(writer) writer.renderendtag() writer.renderendtag() writer.renderendtag() end sub由复合控件的标准设计器用于在设计时重建控件树。
msdn 中的解释重新创建派生自 compositecontrol 的控件的子控件。
protected overrides sub recreatechildcontrols()sub recreatechildcontrols() ensurechildcontrols() end sub数据库分页部分，后面将给出分页的sql server 存储过程。
protected function gotopage()function gotopage() as datatable dim dt as new datatable() conn = new sqlconnection(sqlconnection) conn.open() using conn dim command as new sqlcommand command.connection = conn command.commandtext = storedprocedurename command.commandtype = commandtype.storedprocedure dim parameter as sqlparameter parameter = command.parameters.add("@table", sqldbtype.nvarchar) parameter.value = tablename parameter = command.parameters.add("@primarykeyfield", sqldbtype.nvarchar) parameter.value = primarykeyfield parameter = command.parameters.add("@field", sqldbtype.nvarchar) parameter.value = field parameter = command.parameters.add("@where", sqldbtype.nvarchar) parameter.value = where parameter = command.parameters.add("@groupby", sqldbtype.nvarchar) parameter.value = groupby parameter = command.parameters.add("@orderby", sqldbtype.nvarchar) parameter.value = orderby parameter = command.parameters.add("@pagenumber", sqldbtype.nvarchar) parameter.value = currentpageindex parameter = command.parameters.add("@pagesize", sqldbtype.nvarchar) parameter.value = pagesize parameter = command.parameters.add("@recordcount", sqldbtype.int) parameter.direction = parameterdirection.output command.executenonquery() intrecordcount = command.parameters("@recordcount").value viewstate("recordcount") = intrecordcount viewstate("pagecount") = fix(intrecordcount / pagesize) + 1 dim da as new sqldataadapter(command) da.fill(dt) return dt end using end function数据绑定代码
public overrides sub databind()sub databind() 查找页面中的gridview及datalist并绑定数据 dim objgridview as new gridview dim objdatalist as new datalist if controltopaginate = "" then exit sub end if _controltopaginat = page.findcontrol(controltopaginate) if (_controltopaginat is nothing) then exit sub end if if (typeof _controltopaginat is gridview) then objgridview = ctype(_controltopaginat, gridview) objgridview.datasource = gotopage() objgridview.databind() end if if (typeof _controltopaginat is datalist) then objdatalist = ctype(_controltopaginat, datalist) objdatalist.datasource = gotopage.defaultview objdatalist.databind() end if end sub文章整理：西部数码--专业提供域名注册、虚拟主机服务
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