我得到可怕的“DropDownList1”有一个无效的 SelectedValue,因为它不存在于项目列表中。参数名称:尝试使用其他绑定字段值之一过滤模板字段中的下拉列表时出现值错误(我正在尝试根据其部门获取员工列表 - 即用户可以更改员工但只能更改为另一个同一部门的成员)。
这是代码:
<asp:GridView ID="Rotas" runat="server" AllowSorting="True"
DataSourceID="SqlDataSource3" AutoGenerateEditButton="True" DataKeyNames="DateFrom,DateTo,DepartmentId"
AutoGenerateColumns="False" OnRowUpdating="Rotas_RowUpdating">
<Columns>
<asp:BoundField DataField="DateFrom" HeaderText="DateFrom" ReadOnly="True"
SortExpression="DateFrom" />
<asp:BoundField DataField="DateTo" HeaderText="DateTo" ReadOnly="True"
SortExpression="DateTo" />
<asp:TemplateField HeaderText="Employee Name" SortExpression="EmployeeName">
<EditItemTemplate>
<asp:DropDownList ID="DropDownList1" runat="server"
DataSourceID="SqlDataSource4" DataTextField="EmployeeName"
DataValueField="EmployeeName" SelectedValue='<%# Bind("EmployeeName") %>'>
</asp:DropDownList>
</EditItemTemplate>
<ItemTemplate>
</asp:DropDownList>
<asp:Label ID="Label1" runat="server" Text='<%# Bind("EmployeeName") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="DepartmentId" HeaderText="DepartmentId"
ReadOnly="True" SortExpression="DepartmentId" />
<asp:BoundField DataField="EmployeeId" HeaderText="EmployeeId" ReadOnly="False"
SortExpression="EmployeeId" />
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource3" runat="server"
ConnectionString="<%$ ConnectionStrings:OnCallRotaConnectionString %>"
SelectCommand="SELECT r.DateFrom, r.DateTo, e.EmployeeName, e.EmployeeId, r.departmentid
FROM
dbo.[Rota] r INNER JOIN
dbo.[Employee] AS e ON r.EmployeeId = e.EmployeeId
WHERE (r.DateTo >= GETDATE()) "
UpdateCommand="UPDATE [Rota] SET [EmployeeId] = (select employeeid from employee where employeename = @EmployeeName),
[departmentid] = (select departmentid from employee where employeename = @EmployeeName)
WHERE [DateFrom] = @DateFrom AND [DateTo] = @DateTo AND [DepartmentId] = @DepartmentId">
<UpdateParameters>
<asp:Parameter Name="DateTo" Type="DateTime" />
<asp:Parameter Name="DateFrom" Type="DateTime" />
<asp:Parameter Name="DepartmentId" Type="Int16" />
<asp:Parameter Name="EmployeeId" Type="Int16" />
<asp:Parameter Name="EmployeeName" Type="String" />
</UpdateParameters>
</asp:SqlDataSource>
</p>
<asp:SqlDataSource ID="SqlDataSource4" runat="server"
ConnectionString="<%$ ConnectionStrings:OnCallRotaConnectionString %>"
onselecting="SqlDataSource4_Selecting"
SelectCommand="SELECT [EmployeeName] FROM [Employee] where DepartmentId=@DepartmentId"
>
<SelectParameters>
<asp:ControlParameter ControlID="Rotas" Name="DepartmentId"
PropertyName="SelectedValue" Type="Int16" />
</SelectParameters>
</asp:SqlDataSource>
真的看不出我做错了什么。如果我不使用“选择参数”而只使用“从员工中选择员工姓名”,那么整个员工列表都会显示得很好。一旦我尝试使用控制参数,它就会倒下。帮助!:)
提前感谢您提供的任何帮助。