Question

我的页面上有一个gridview控件，每当我尝试使用它附带的删除按钮时，它就会给我上面提到的错误。这是我的代码：

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
    DataKeyNames="ID" DataSourceID="AccessDataSource1">
    <Columns>
        <asp:CommandField ShowDeleteButton="True" ShowEditButton="True" />
        <asp:BoundField DataField="ID" HeaderText="ID" InsertVisible="False" 
            ReadOnly="True" SortExpression="ID" />
        <asp:ImageField DataImageUrlField="picPath" 
        DataImageUrlFormatString="PlaceImages/{0}" HeaderText="Picture"  ControlStyle-CssClass="editPhotoGridFormat">
        <ControlStyle CssClass="editPhotoGridFormat"></ControlStyle>
            </asp:ImageField>
        <asp:BoundField DataField="PicPath" HeaderText="Filename" />
        <asp:BoundField DataField="Title" HeaderText="Title" SortExpression="Title" />
        <asp:BoundField DataField="City" HeaderText="City" SortExpression="City" />
        <asp:BoundField DataField="Country" HeaderText="Country" 
            SortExpression="Country" />
    </Columns>
</asp:GridView>
<asp:AccessDataSource ID="AccessDataSource1" runat="server" 
    DataFile="~/App_Data/TravelJoansDB.mdb" 
    DeleteCommand="DELETE FROM [Slides] WHERE [ID] = ?" 
    InsertCommand="INSERT INTO [Slides] ([ID], [PicPath], [Title], [City], [Country]) VALUES (?, ?, ?, ?, ?)" 
    SelectCommand="SELECT * FROM [Slides]" 
    UpdateCommand="UPDATE [Slides] SET [PicPath] = ?, [Title] = ?, [City] = ?, [Country] = ? WHERE [ID] = ?">
    <DeleteParameters>
        <asp:Parameter Name="ID" Type="Int32" />
    </DeleteParameters>
    <InsertParameters>
        <asp:Parameter Name="ID" Type="Int32" />
        <asp:Parameter Name="PicPath" Type="String" />
        <asp:Parameter Name="Title" Type="String" />
        <asp:Parameter Name="City" Type="String" />
        <asp:Parameter Name="Country" Type="String" />
    </InsertParameters>
    <UpdateParameters>
        <asp:Parameter Name="PicPath" Type="String" />
        <asp:Parameter Name="Title" Type="String" />
        <asp:Parameter Name="City" Type="String" />
        <asp:Parameter Name="Country" Type="String" />
        <asp:Parameter Name="ID" Type="Int32" />
    </UpdateParameters>
</asp:AccessDataSource>

我实际上遇到了这个问题，另一个页面上有更多东西，而不仅仅是gridview。我很好奇，如果它与它有任何关系，所以我只是创建了一个新的页面，只复制了数据源和gridview，它仍然给了我同样的错误。表中只有9条记录，肯定没有重复的PK。只有ID字段被标记为表中的主键。发生了什么事？

Answer 1

请勿使用命令中提到的问号。请按照下面的说法进行更改，然后就可以了。

DeleteCommand="DELETE FROM [Slides] WHERE [ID] = @ID" 
InsertCommand="INSERT INTO [Slides] ([ID], [PicPath], [Title], [City], [Country]) VALUES (@ID, @PicPath, @Title, @City, @Country)" 
SelectCommand="SELECT * FROM [Slides]" 
UpdateCommand="UPDATE [Slides] SET [PicPath] = @PicPath, [Title] = @Title, [City] = @City, [Country] = @Country WHERE [ID] = @ID">

如果你的表ID有自动增量，那么不要在insert命令中使用ID。

DeleteCommand="DELETE FROM [Slides] WHERE [ID] = @ID" 
InsertCommand="INSERT INTO [Slides] ([PicPath], [Title], [City], [Country]) VALUES ( @PicPath, @Title, @City, @Country)" 
SelectCommand="SELECT * FROM [Slides]" 
UpdateCommand="UPDATE [Slides] SET [PicPath] = @PicPath, [Title] = @Title, [City] = @City, [Country] = @Country WHERE [ID] = @ID">

具有相同密钥的条目已存在？网格视图

1 个答案: