您需要配置数据源以使用参数。
<asp:sqlDataSource ID="EmployeeDetailsSqlDataSource"
SelectCommand="select [UserName], [MonthlyHourLimit] from [UserData] where UserName= @UserName"
InsertCommand="IINSERT INTO [UserData] ([UserName], [MonthlyHourLimit]) VALUES (@UserName, @MonthlyHourLimit);"
ConnectionString="<%$ ConnectionStrings:MyConnection %>"
RunAt="server">
<SelectParameters>
<asp:Parameter Name="UserName" Type="Int32" DefaultValue="0" />
</SelectParameters>
<InsertParameters>
<asp:Parameter Name="UserName" Direction="Input" Type="String" />
<asp:Parameter Name="MonthlyHourLimit" Direction="Input" Type="String" />
</InsertParameters>
</asp:sqlDataSource>
更新:我忘了提,你想使用ControlParameter而不是简单的参数。看看下面的片段:
<asp:СontrolParameter Name="UserName" ControlId="ddlUserNames" PropertyName="SelectedValue"/>
...
<asp:DropdownList
ID="ddlUserNames"
runat="server"
Autopostback="True">
<asp:Listitem Selected="True">Users</asp:Listitem>
<asp:Listitem Value="Peter">Peter</asp:Listitem>
<asp:Listitem Value="Jessica">Jessica</asp:Listitem>
</asp:Dropdownlist>
请查看相应的MSDN页面,详细描述 SqlDataSource 的用法。
更新2:完整的例子,以避免混淆
<asp:sqlDataSource ID="EmployeeDetailsSqlDataSource"
SelectCommand="select [UserName], [MonthlyHourLimit] from [UserData] where UserName= @UserName"
InsertCommand="IINSERT INTO [UserData] ([UserName], [MonthlyHourLimit]) VALUES (@UserName, @MonthlyHourLimit);"
ConnectionString="<%$ ConnectionStrings:MyConnection %>"
RunAt="server">
<SelectParameters>
<asp:Parameter Name="UserName" Type="Int32" DefaultValue="0" />
</SelectParameters>
<InsertParameters>
<asp:ControlParameter Name="UserName" ControlId="txtUserName" Direction="Input" Type="String" />
<asp:ControlParameter Name="MonthlyHourLimit" ControlId="txtMonthlyHourLimit" Direction="Input" Type="String" />
</InsertParameters>
</asp:sqlDataSource>
<asp:TextBox runat="server" ID="txtUserName" />
<asp:TextBox runat="server" ID="txtMonthlyHourLimit" />