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declare @aa nvarchar(200)
declare @bb nvarchar(200)
declare @SQL Nvarchar(2000)
set @aa='order_no'
set @bb='%PO2010020505A%'
set @SQL='Select order_no from tb_order_apao where 1=1'+' and '+@aa+' like N'''+@bb+''' '
print(@SQL)
where '+@aa+' like N'%'+@bb+'%'
<asp:SqlDataSource id="SqlDataSource2" runat="server" SelectCommand="SELECT [编号], [文件名], [上传时间], [类别] FROM [图像信息] WHERE ([类别] = @类别) AND ([关键字] like '%'+@关键字+'%')" ConnectionString="<%$ ConnectionStrings:LocalSqlServer %>">
<SelectParameters>
<asp:ControlParameter ControlID="DropDownList1" Name="类别" PropertyName="SelectedValue" Type="String" />
<asp:ControlParameter ControlID="txtKeyWord" Name="关键字" PropertyName="Text" Type="String" />
</SelectParameters>
</asp:SqlDataSource>