ASP.NET Formview无法正确更新SQL数据库

Question

我有一个连接到SQL数据源的asp.net Formview.当我创建/编辑/删除记录时,列数据被删除.我确信这是一些简单的错误编码,因为我对SQL/asp.net所知的一切都在过去几周中用谷歌搜索过了.

这是SQLDataSource代码.

 <asp:SqlDataSource ID="SqlDataSource1" runat="server" 
    ConnectionString="<%$ ConnectionStrings:hulc01ConnectionString %>"
    SelectCommand="SELECT * FROM [Common]"
    InsertCommand="INSERT INTO [Common] ([Project_Name], 
        [Business_Category], [Project_Description], [Operations_Owner]) 
        VALUES (@ProjectName, @BusinessCategory, @ProjectDescription, 
        @OperationsOwner)"
    DeleteCommand="DELETE FROM [Common] WHERE [ProjectKey] = @ProjectKey"
    UpdateCommand="UPDATE [Common] 
        SET 
        [Project_Name] = @ProjectName, 
        [Business_Category] = @BusinessCategory, 
        [Project_Description] = @ProjectDescription, 
        [Operations_Owner] = @OperationsOwner 
        WHERE ProjectKey=@ProjectKey" >
    <DeleteParameters>
        <asp:Parameter Name="ProjectKey" Type="Int32" />          
    </DeleteParameters>
    <UpdateParameters>
        <asp:Parameter Name="ProjectKey" Type="Int32" />            
        <asp:Parameter Name="ProjectName" Type="String" />
        <asp:Parameter Name="BusinessCategory" Type="String" />
        <asp:Parameter Name="ProjectDescription" Type="String" />
        <asp:Parameter Name="OperationsOwner" Type="String" />            
    </UpdateParameters>
    <InsertParameters>
        <asp:Parameter Name="ProjectName" Type="String" />
        <asp:Parameter Name="BusinessCategory" Type="String" />
        <asp:Parameter Name="ProjectDescription" Type="String" />
        <asp:Parameter Name="OperationsOwner" Type="String" />
    </InsertParameters>
</asp:SqlDataSource>

这是formview代码

<asp:FormView ID="FormView1" runat="server" AllowPaging="True" 
        DataKeyNames="ProjectKey" 
        DataSourceID="SqlDataSource1" 
        Width="249px">
        <EditItemTemplate>
            Project Name:
            <asp:TextBox runat="server" 
                ID="ProjectName" 
                Text='<%# Bind("Project_Name") %>' />        
            <br />
            Business Category:
            <asp:TextBox runat="server" 
                ID="BusinessCategory" 
                Text='<%# Bind("Business_Category") %>' />
            <br />
            Project Description:
            <asp:TextBox runat="server" 
                ID="ProjectDescription" 
                Text='<%# Bind("Project_Description") %>' />
            <br />
            Operations Owner:
            <asp:TextBox runat="server" 
                ID="OwnerTextBox" 
                Text='<%# Bind("Operations_Owner") %>' />
            <br />
            <asp:LinkButton runat="server" 
                ID="UpdateButton" 
                CausesValidation="True" 
                CommandName="Update" 
                Text="Update" />
            &nbsp;<asp:LinkButton runat="server" 
                ID="UpdateCancelButton" 
                CausesValidation="False" 
                CommandName="Cancel" 
                Text="Cancel" />
        </EditItemTemplate>

        <InsertItemTemplate>
           Project Name:
            <asp:TextBox runat="server" 
                ID="ProjectName" 
                Text='<%# Bind("Project_Name") %>' />        
            <br />
            Business Category:
            <asp:TextBox runat="server" 
                ID="BusinessCategory"
                Text='<%# Bind("Business_Category") %>' />
            <br />
            Project Description:
            <asp:TextBox runat="server" 
                ID="Description" 
                Text='<%# Bind("Project_Description") %>' />
            <br />
            Operations Owner:
            <asp:TextBox runat="server" 
                ID="TitleTextBox" 
                Text='<%# Bind("Operations_Owner") %>' />
            <br />
            <asp:LinkButton runat="server" 
                ID="InsertButton" 
                CausesValidation="True" 
                CommandName="Insert" 
                Text="Insert" />
            &nbsp;<asp:LinkButton runat="server" 
                ID="InsertCancelButton" 
                CausesValidation="False" 
                CommandName="Cancel" 
                Text="Cancel" />
        </InsertItemTemplate>
        <ItemTemplate>
            Project Name:
            <asp:Label runat="server" 
                ID="ProjectNameLabel" 
                Text='<%# Bind("Project_Name") %>' />
            <br />
            Business Category:
            <asp:Label runat="server" 
                ID="BusinessCategoryLabel" 
                Text='<%# Bind("Business_Category") %>' />
            <br />
            Project Description:
            <asp:Label runat="server" 
                ID="ProjectDescriptionLabel" 
                Text='<%# Bind("Project_Description") %>' />
            <br />
            Operations Owner:
            <asp:Label runat="server" 
                ID="OwnerLabel" 
                Text='<%# Bind("Operations_Owner") %>' />
            <br />
            <asp:LinkButton runat="server" 
                ID="EditButton" 
                CausesValidation="False" 
                CommandName="Edit" 
                Text="Edit" />
            &nbsp;<asp:LinkButton runat="server" 
                ID="DeleteButton" 
                CausesValidation="False" 
                CommandName="Delete" Text="Delete" />
            &nbsp;<asp:LinkButton runat="server" 
                ID="NewButton" 
                CausesValidation="False" 
                CommandName="New" 
                Text="New" />

        </ItemTemplate>
    </asp:FormView>  

谢谢!

Answer 1

您的DeleteCommand和UpdateCommand没有使用与在DataKeyNames属性中声明的相同的键FormView.它们应该是这样的:

DeleteCommand="DELETE FROM [Common] WHERE [Project_Key] = @ProjectKey" 

UpdateCommand="UPDATE [Common] " + 
              "SET [Project_Name] = @ProjectName, [Business_Category] = @BusinessCategory, [Project_Description] = @ProjectDescription, [Operations_Owner] = @OperationsOwner" +
              "WHERE Project_Key=@ProjectKey>"

DataKeyNames属性用于控制使用的完成的自动UPDATE和DELETE FormView,因此它应该是表中的主键,并且它应该在所有三个位置匹配(UpdateCommand,DeleteCommand和DataKeyNames).来自MSDN:

使用DataKeyNames属性指定以逗号分隔的字段名称列表,这些字段名称表示数据源的主键.

(在该页面的代码示例中,您可以看到UpdateCommand的WHERE子句中使用的参数与DataKeyNames中指定的值相同FormView)

请注意,在您显示的代码中,您的UpdateCommand根本不使用where子句.这意味着它将使用相同的值集更新表中的每条记录.仅供参考=)

编辑:当你使用FormView这样的时候,你真的不需要像你拥有它们那样设置UpdateParameters(因为你在模板中的控件上使用双向数据绑定来编辑/插入).试试吧SQLDataSource

<asp:SqlDataSource ID="SqlDataSource1" runat="server" 
    ConnectionString="<%$ ConnectionStrings:hulc01ConnectionString %>"
    SelectCommand="SELECT * FROM [Common]"
    InsertCommand="INSERT INTO [Common] ([Project_Name], [Business_Category], [Project_Description], [Operations_Owner]) VALUES (@Project_Name, @Business_Category, @Project_Description, @Operations_Owner)"
    DeleteCommand="DELETE FROM [Common] WHERE [ProjectKey] = @ProjectKey"
    UpdateCommand="UPDATE [Common] SET [Project_Name] = @Project_Name, [Business_Category] = @Business_Category, [Project_Description] = @Project_Description, [Operations_Owner] = @Operations_Owner WHERE ProjectKey=@ProjectKey" >
</asp:SqlDataSource>

当我不使用时,我通常只使用UpdateParameters,DeleteParameters等FormView,或者我需要根据外部的控件来过滤它们FormView.如果这不适合你,请告诉我.