Question

我搜索了所有地方，但没有明确的答案我正在尝试使用详细信息视图使用以下代码更新记录：

        <asp:GridView ID="GridView1" runat="server" AllowPaging="True" 
        AllowSorting="True" AutoGenerateColumns="False" 
        BackColor="LightGoldenrodYellow" BorderColor="Tan" BorderWidth="1px" 
        CellPadding="2" DataKeyNames="Rec_ID" DataSourceID="ContactsMasterDS" 
        ForeColor="Black" GridLines="None" PageSize="3">
        <AlternatingRowStyle BackColor="PaleGoldenrod" />
        <Columns>
            <asp:CommandField ShowSelectButton="True" />
            <asp:BoundField DataField="Title" HeaderText="Title" SortExpression="Title" />
            <asp:BoundField DataField="Full_Name" HeaderText="Full_Name" SortExpression="Full_Name" />
            <asp:BoundField DataField="Gender" HeaderText="Gender" SortExpression="Gender" />
            <asp:BoundField DataField="AgeGroup" HeaderText="AgeGroup" SortExpression="AgeGroup" />
            <asp:BoundField DataField="Nationality" HeaderText="Nationality" SortExpression="Nationality" />
            <asp:BoundField DataField="Occupation" HeaderText="Occupation" SortExpression="Occupation" />
            <asp:BoundField DataField="Resident" HeaderText="Resident" SortExpression="Resident" />
        </Columns>
        <FooterStyle BackColor="Tan" />
        <HeaderStyle BackColor="Tan" Font-Bold="True" />
        <PagerStyle BackColor="PaleGoldenrod" ForeColor="DarkSlateBlue" HorizontalAlign="Center" />
        <SelectedRowStyle BackColor="DarkSlateBlue" ForeColor="GhostWhite" />
        <SortedAscendingCellStyle BackColor="#FAFAE7" />
        <SortedAscendingHeaderStyle BackColor="#DAC09E" />
        <SortedDescendingCellStyle BackColor="#E1DB9C" />
        <SortedDescendingHeaderStyle BackColor="#C2A47B" />
    </asp:GridView>
    <asp:SqlDataSource ID="ContactsMasterDS" runat="server" ConnectionString="<%$ ConnectionStrings:ConnectionString %>" 
        ProviderName="<%$ ConnectionStrings:ConnectionString.ProviderName %>" 
        SelectCommand="Select * from Contacts"></asp:SqlDataSource>
    <br />
    <asp:DetailsView ID="DetailsView1" runat="server" AutoGenerateRows="False" 
        DataKeyNames="Rec_ID" DataSourceID="ContactsDetailsDS" Height="50px" 
        Width="545px" onitemupdated="DetailsView1_ItemUpdated">
        <Fields>
            <asp:BoundField DataField="Rec_ID" HeaderText="Rec_ID" ReadOnly="True" SortExpression="Rec_ID" />
            <asp:BoundField DataField="Gender" HeaderText="Gender" SortExpression="Gender" />
            <asp:BoundField DataField="AgeGroup" HeaderText="AgeGroup" SortExpression="AgeGroup" />
            <asp:BoundField DataField="Title" HeaderText="Title" SortExpression="Title" />
            <asp:BoundField DataField="Full_Name" HeaderText="Full_Name" SortExpression="Full_Name" />
            <asp:BoundField DataField="DOB" HeaderText="DOB" SortExpression="DOB" />
            <asp:BoundField DataField="Phone_No" HeaderText="Phone_No" SortExpression="Phone_No" />
            <asp:BoundField DataField="Email" HeaderText="Email" SortExpression="Email" />
            <asp:BoundField DataField="Nationality" HeaderText="Nationality" SortExpression="Nationality" />
            <asp:BoundField DataField="Account_No" HeaderText="Account_No" SortExpression="Account_No" />
            <asp:BoundField DataField="Occupation" HeaderText="Occupation" SortExpression="Occupation" />
            <asp:BoundField DataField="Resident" HeaderText="Resident" SortExpression="Resident" />
            <asp:BoundField DataField="Room_No" HeaderText="Room_No" SortExpression="Room_No" />
            <asp:BoundField DataField="Last_Branch" HeaderText="Last_Branch" SortExpression="Last_Branch" />
            <asp:BoundField DataField="Last_Date" HeaderText="Last_Date" SortExpression="Last_Date" />
            <asp:BoundField DataField="Last_Time" HeaderText="Last_Time" SortExpression="Last_Time" />
            <asp:CheckBoxField DataField="isComplete" HeaderText="isComplete" SortExpression="isComplete" />
            <asp:CommandField ShowEditButton="True" />
        </Fields>
    </asp:DetailsView>
    <asp:SqlDataSource ID="ContactsDetailsDS" runat="server" 
        ConnectionString="<%$ ConnectionStrings:ConnectionString %>" 
        ProviderName="<%$ ConnectionStrings:ConnectionString.ProviderName %>" 
        SelectCommand="Select * from Contacts where [Rec_ID] = @Rec_ID" 
        UpdateCommand="Update Contacts Set Room_No=@Room_No Where Rec_ID=@Rec_ID" >
        <SelectParameters>
            <asp:ControlParameter ControlID="GridView1" Name="Rec_ID" PropertyName="SelectedValue" />
        </SelectParameters>
        <UpdateParameters>
            <asp:Parameter Name="Room_No" Type="String" />
            <asp:Parameter Name="Rec_ID" Type="String" DefaultValue="0" />
        </UpdateParameters>
    </asp:SqlDataSource>

当我将where子句更改为＆＃34;其中Rec_ID = 2＆＃34;它工作，但使用参数时，它不会执行所需的更新任何帮助，请

Answer 1

    private void OnDetailsViewItemUpdating(object sender, DetailsViewUpdateEventArgs e) {
        if (String.Equals((string)e.NewValues["firstName"], "john", StringComparison.OrdinalIgnoreCase)) {
            // "John" is not a valid name, so change it to "Steve":
            e.NewValues["firstName"] = "Steve";
        }
        if (String.Equals((string)e.NewValues["lastName"], "doe", StringComparison.OrdinalIgnoreCase)) {
            // If "Doe" is the last name, cancel the whole operation
            e.Cancel = true;
        }

}

您必须编写“OnItemUpdated”而不是onitemupdated。检查案例。

希望这会对你有所帮助。 DetailsView控件的ItemUpdating事件包含的参数既包含原始数据（如果可用），也包含用户输入的新数据。以下是如何检查数据并可选择修改数据的示例

Answer 2

我发现解决方案如下：

1-在where子句中：将Rec_ID更改为任何其他名称，例如ID。

之前：UpdateCommand="Update Contacts Set Room_No=@Room_No Where [Rec_ID]=@Rec_ID">

之后：UpdateCommand="Update Contacts Set Room_No=@Room_No Where [Rec_ID]=@ID">

UpdateParameters中的

2-获取ID的值：

之前：<asp:Parameter Name="Rec_ID" Type="Int32" />

之后：<asp:ControlParameter ControlID="DetailsView1" Name="ID" PropertyName="SelectedValue" />

这将允许您将Rec_ID保持为只读，甚至删除将其隐藏在DetailsView

中

谢谢你们所有人

DetailView更新无效

2 个答案: