說說vb.net ajaxpro 實現dropdownlist二級無刷新聯動~！ Code
<div?class="div_RSL">?
<asp:DropDownList?ID="DropDownList1"?runat="server"?DataSourceID="proID"?DataTextField="proName"AutoPostBack="false"?DataValueField="proID">?
</asp:DropDownList>?
<asp:SqlDataSource?ID="proID"?runat="server"?ConnectionString="<%$?ConnectionStrings:opperajaxConnectionString?%>"SelectCommand="SELECT?[proID],?[proName]?FROM?[TB_province]?ORDER?BY?[proID]"></asp:SqlDataSource>?
<asp:DropDownList?ID="DropDownList2"?runat="server">?
</asp:DropDownList>?
</div> 這里dropdownlist1是服務器控件綁定，很方便~！ Code
function?ShowCity(id)?
{?
?????var?res=?Other_Register2.GetCity(id).value;?
?????var?drop?=?document.getElementById("<%=DropDownList2.UniqueID?%>");?
?????drop.length=0;?
?????for(var?i=0;i<res.Rows.length;i++)????
????????????{?????????
?????????????drop.options.add(new?Option(res.Rows[i].TB_cityName,res.Rows[i].TB_cityID));?
????????????}????
} ? alert(res)將返回一個[object object]類型 alert(res.rows)將返回一個object類型 alert(res.rows[0].value)將返回一個[object object]類型 如果返回null類型，接收不到datatable數據，則可能是你的ajaxpro.2.dll并不支持datatable輸出，建議你下載文章末尾ajaxpro.2.dll附件~！ vb.net寫法： Code
Sub?Page_Load()?Sub?Page_Load(ByVal?sender?As?Object,?ByVal?e?As?System.EventArgs)?Handles?Me.Load?
????If?Not?Page.IsPostBack?Then?
????????DropDownList1.Attributes("onchange")?=?"ShowCity(this.options[selectedIndex].value)"?
????End?If?????????
AjaxPro.Utility.RegisterTypeForAjax(GetType(Other_Register2))?
End?Sub?

Function?GetCity()?Function?GetCity(ByVal?sproid)?As?DataTable?
Dim?sqlconnection?As?New?SqlConnection(ShareFunction.GetDBConnectionString())?
sqlconnection.Open()?
Dim?sql?As?String?=?"select?TB_cityID,TB_cityName?from?TB_city?where?proID="?&?ShareFunction.SafeRequest(sproid,?1)?&?""?
Dim?dataada?As?New?SqlDataAdapter(sql,?sqlconnection)?
Dim?dt?As?New?DataTable?
dataada.Fill(dt)?
Return?dt?
End?Function

這里使用dataadapter對象將查詢數據存入datatable中~！

ajaxpro.2.dll

轉載于:https://www.cnblogs.com/opper/archive/2009/01/09/1372846.html

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