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<asp:Repeater ID="Repeater1" runat="server">
   <ItemTemplate>
       <tr onkeyup="">
            <td align="center" bgcolor="#FFFFFF" style="width: 112px">

                <%#Eval("package")%>
            </td>
            <td align="center" bgcolor="#FFFFFF">
             <asp:TextBox ID="TextBox1" runat="server" Width="60px"  AutoPostBack="true"

OnTextChanged="TextBox1_TextChanged" onkeyup="txtsum(this.id)"></asp:TextBox>
            </td>
            <td align="center" bgcolor="#FFFFFF">
                <asp:Label ID="Label2" runat="server" Text='<%#Eval("amount")%>'></asp:Label>
            </td>
            <td align="center" bgcolor="#FFFFFF">
                <asp:Label ID="Label3" runat="server" Text='<%#Eval("xPrice")%>'></asp:Label>
            </td>
            <td align="center" bgcolor="#FFFFFF">
                <asp:Label ID="Label1" runat="server" Text=""></asp:Label>
            </td>
            <td runat="server" align="center" bgcolor="#FFFFFF" style="width: 157px" id="tdbutton">
                <asp:ImageButton runat="server" ID="ImageButton1" ImageUrl="../../image/product/pic7.jpg"
Width="138" Height="38" OnClick="ImageButton1_Click" />
            </td>
         </tr>
     </ItemTemplate>
</asp:Repeater>

我要当改变 TextBox1中的值时Label1的值也改变.Label1=TextBox1乘xPrice是固定值
--------------------编程问答-------------------- 给你基本思路：



<asp:TextBox ID="TextBox1" runat="server" Width="60px"  AutoPostBack="true" 



OnTextChanged="TextBox1_TextChanged" onkeyup="txtsum(this.value, <%#Container.ItemIndex%>)">



function txtsum(val, trIndex){

   $("#Repeater1").rows[trIndex].cells[6].innerHTML = val * price;

}

--------------------编程问答--------------------

引用 1 楼 kyoybs 的回复:

给你基本思路：
HTML code<asp:TextBoxID="TextBox1" runat="server" Width="60px" AutoPostBack="true"

OnTextChanged="TextBox1_TextChanged" onkeyup="txtsum(this.value, <%#Container.ItemIndex%>)">JScript codefunction txtsum(val, trIndex){
$("#Repeater1").rows[trIndex].cells[6].innerHTML= val* price;
}

补充：.NET技术 ,  ASP.NET