DetailsView OnUpdating TextBox 不返回新文本 ASP.NET C#

Question

我有一个 DetailsView 和一个 SqlDataSource，如下所示。 NotesTB 和 NameTB 在后面的代码中不为空，但不保留输入的新值。它们返回最初绑定的旧值。我在网上搜索过，找不到这个原因，这让我很困惑。

<asp:DetailsView ID="PhotoDetailsDV" runat="server" Height="50px" Width="125px" DefaultMode="Edit" AutoGenerateRows="False" DataKeyNames="PhotoID"  DataSourceID="XXXXXXXXXX" OnDataBound="PhotoDetailsDV_DataBound" OnItemUpdating="PhotoDetailsDV_ItemUpdating1" >
    <Fields>
        <asp:TemplateField HeaderText="Notes" SortExpression="Notes">
            <EditItemTemplate>
                <asp:TextBox ID="NotesTB" runat="server" Text='<%# Bind("Notes") %>'></asp:TextBox>
                <asp:HiddenField runat="server" ID="PhotoIdHF" Value='<%# Bind("PhotoID") %>'/>
            </EditItemTemplate>
            <ItemTemplate>
                <asp:Label ID="NotesLabel" runat="server" Text='<%# Bind("Notes") %>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Name" SortExpression="Name">
            <EditItemTemplate>
                <asp:TextBox ID="NameTB" runat="server" Text='<%# Bind("Name") %>'></asp:TextBox>
            </EditItemTemplate>
            <ItemTemplate>
                <asp:Label ID="NameLabel" runat="server" Text='<%# Bind("Name") %>'></asp:Label>
            </ItemTemplate>               
        </asp:TemplateField>            
        <asp:CommandField ShowEditButton="True" />
    </Fields>
</asp:DetailsView>

<asp:SqlDataSource runat="server" ID="XXXXX" ConnectionString="<%$ ConnectionStrings:XXXXXXXXXXXXXXX %>" SelectCommand="SELECT [Notes], Photoid, [Name] FROM [XXXXXXXX] WHERE ([FileID] = @FileID)"  UpdateCommand="UPDATE [XXXXXXX] SET [Notes] = @Notes, [Name] = @Name WHERE [PhotoID] = @PhotoID">        
    <SelectParameters>
        <asp:Parameter Name="FileID" Type="Int32" />
    </SelectParameters>
    <UpdateParameters>
        <asp:Parameter Name="Notes" Type="String" />
        <asp:Parameter Name="Name" Type="String" />
        <asp:Parameter Name="PhotoID" Type="Int32" />
    </UpdateParameters>
</asp:SqlDataSource>

我后面的代码如下

protected void PhotoDetailsDV_ItemUpdating1(object sender, DetailsViewUpdateEventArgs e)
    {
        TextBox NameTB = (TextBox) PhotoDetailsDV.FindControl("NameTB");
        TextBox NotesTB = (TextBox) PhotoDetailsDV.FindControl("NotesTB");
        e.NewValues["Notes"] = NotesTB.Text;//here NotesTB.Text is "" even when something is entered or it is the old value
        e.NewValues["Name"] = NameTB.Text;//here NameTB.Text is "" even when something is entered or it is the old value
    }

Answer 1

将数据绑定到详细视图的代码，您是否使用 not is postback 条件来确保它不会在 postback 后重新绑定数据？

DetailsView OnUpdating TextBox 不返回新文本 ASP.NET C#

DetailsView OnUpdating TextBox not returning new text ASP.NET C#

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