请解决错误
我有2个DropDownList的。首先,我进入编辑的DropDownList项目的价值和在第二个值取决于从第一个DropDownList选定的值
从Oracle表中选择
在第二个下拉列表中显示的错误是它给"system.data.datarowview"的结果<asp:DropDownList ID="DropDownList2" runat="server" AutoPostBack="true" Visible="true">
<asp:ListItem>crt
<asp:ListItem>lcd
<asp:ListItem>led
<asp:DropDownList ID="monitor" runat="server" DataSourceID="moni" Visible="false" >
<asp:SqlDataSource ID="moni" runat="server"
ConnectionString="<%$ ConnectionStrings:constr %>"
ProviderName="<%$ ConnectionStrings:constr.ProviderName %>"
SelectCommand="SELECT "SRNO" FROM "MASTER" WHERE ("ITEM" = :ITEM)">
<SelectParameters>
<asp:ControlParameter ControlID="DropDownList2" Name="ITEM"
PropertyName="SelectedValue" Type="String" />
</SelectParameters>