收到错误“查询输入必须包含至少一个表或查询”。

Question

我正在使用 Visual Studio 2010 创建一个表单，您可以在其中编辑、删除或插入来自 accessdatabase 的数据。当我尝试在 Web 浏览器中运行表单时，我收到错误“查询输入必须包含至少一个表或查询”。我相信问题出在我的代码/语法上，但我无法确定问题的原因。我在下面添加了一些代码，任何帮助/提示将不胜感激。谢谢。

<asp:AccessDataSource ID="AccessDataSource1" runat="server" 
            DataFile="~/App_Data/database.accdb" SelectCommand="SELECT * FROM [database]"
            DeleteCommand="DELETE FROM [database] WHERE ([EmployeeID] = @EmployeeID)"
            UpdateCommand="UPDATE [database] SET [Phone]=@Phone,[FirstName] = @FirstName, [LastName]= @LastName  WHERE ([EmployeeID] = @EmployeeID)"
            InsertCommand="INSERT INTO [database] (Phone,FirstName,LastName) VALUES (@Phone,@FirstName,@LastName) WHERE ([EmployeeID] = @EmployeeID)">
            <InsertParameters>
             <asp:formparameter name="Phone" formfield="tbPhone" />
             <asp:formparameter name="FirstName"  formfield="tbFirstName" />
             <asp:formparameter name="LastName"  formfield="tbLastName" />
            </InsertParameters>
        </asp:AccessDataSource>
        <asp:GridView ID="gvEmployee" runat="server" AutoGenerateColumns="False" 
            DataSourceID="AccessDataSource1" DataKeyNames="EmployeeID"
            AutoGenerateDeleteButton="True" AutoGenerateEditButton="True" AutoGenerateInsertButton="True"
            EmptyDataText="There are no data records to display." Width="372px">
            <Columns>
                <asp:BoundField DataField="Phone" HeaderText="Phone"
                     SortExpression="Phone" />
                <asp:BoundField DataField="FirstName" HeaderText="FirstName" 
                    SortExpression="FirstName" />
                <asp:BoundField DataField="LastName" HeaderText="LastName" 
                    SortExpression="LastName" />

            </Columns>
        </asp:GridView>        
    </td>
     </tr>
    <tr>
    <td>
        Phone Number: 
        <asp:TextBox ID="tbPhone" runat="server"></asp:TextBox><br /> 
        First Name:
        <asp:TextBox ID="tbFirstName" runat="server"></asp:TextBox> <br /> 
        Last Name:&nbsp;
        <asp:TextBox ID="tbLastName" runat="server"></asp:TextBox> <br />           
        <asp:button id="Button1" runat="server" text="New Employee" onclick="InsertEmployee" />
    </td>
    </tr>

Answer 1

什么是[数据库]？那是你的表名吗？您需要指定表名，例如 PERSONS 或Employees？

SELECT * FROM [database]

试试类似的东西

SELECT * FROM Employee

现在试试这个

SELECT Phone,FirstName,LastName,EmployeeID FROM [employees]

如果可行，则意味着员工表中的某些字段无法处理...由于上述触发错误，这意味着代码无法处理 Autonum 字段。请尝试以下操作：

SELECT Phone,FirstName,LastName,CAST(EmployeeID as INT) as EmployeeID 
       FROM [employees]

尝试将 where 子句完全从 INSERT SQL 中移除

  InsertCommand="INSERT INTO [database] (Phone,FirstName,LastName) VALUES (@Phone,@FirstName,@LastName) "