小编ana*_*kos的帖子

我想将相同的数据源分配给表单中的多个DropDownLists,当页面加载时,只有第一个下拉列表填充了数据源的内容,其他的是空的,缺少的是什么？谢谢你的回答.这是代码;

<form id="form1" runat="server">    
    <asp:ScriptManager ID="scriptManager1" runat="server"></asp:ScriptManager>
<asp:UpdatePanel ID="panel1" runat="server" UpdateMode="Conditional">
    <ContentTemplate>
     <div id="div1" align="center">
      <table>
       <tr>
         <td><b>Brand-Model</b></td>
         <td><asp:TextBox ID="brandText" runat="server" BorderStyle="Inset"></asp:TextBox></td>
         <td><asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="brandText" Display="Dynamic" ErrorMessage="*"></asp:RequiredFieldValidator></td>
       </tr>
       <tr>
         <td><b>Black</b></td>
         <td><asp:DropDownList ID="blackList" runat="server"></asp:DropDownList></td>
         <td><asp:HyperLink ID="HyperLink1" runat="server" Text="Add Cartridge" NavigateUrl="~/Admin/addCartridge.aspx"></asp:HyperLink></td>
       </tr>
       <tr>
         <td><b>Color1</b></td>
         <td><asp:DropDownList ID="colorList1" runat="server"></asp:DropDownList></td>
       </tr> 
       <tr>
         <td><b>Color2</b></td>
         <td><asp:DropDownList ID="colorList2" runat="server"></asp:DropDownList></td>
       </tr>
       <tr>
         <td><b>Color3</b></td>
         <td><asp:DropDownList ID="colorList3" runat="server"></asp:DropDownList></td>
       </tr>
       <tr>
         <td><b>Other1</b></td>
         <td><asp:DropDownList ID="otherColor1" runat="server"></asp:DropDownList></td>
       </tr>
       <tr>
         <td><b>Other2</b></td>
         <td><asp:DropDownList ID="otherColor2" runat="server"></asp:DropDownList></td>
       </tr>
       <tr>
         <td><b>Other3</b></td>
         <td><asp:DropDownList ID="otherColor3" runat="server"></asp:DropDownList></td>
       </tr>
       <tr>
         <td></td>
         <td><asp:Button …