Question

我是ASP.net的新手，所以我现在才开始使用TemplateFields。我有一个DetailsView，它包含一个DropDownList，当DetailsView在EditMode中时，它会从我的代码隐藏中填充它。

这很好。但是，从我的DropDownList中选择一个项目，然后单击“更新”后，选择不会更新，但其他DetailsView表单值是。

这是我的代码：

DetailsView＆amp; SQL查询：

<asp:DetailsView ID="DetailsView1" runat="server" Height="50px" Width="315px"
    AutoGenerateRows="False" DataKeyNames="ID" DataSourceID="SqlDataSource1"
    OnDataBound="DetailsView1_DataBound">
    <Fields>
        <asp:CommandField ShowEditButton="True" ControlStyle-CssClass="button" >
            <ControlStyle CssClass="button"></ControlStyle>
        </asp:CommandField>
        <asp:BoundField DataField="FirstName" HeaderText="First Name"
            SortExpression="FirstName" />
        <asp:BoundField DataField="LastName" HeaderText="Last Name"
            SortExpression="LastName" />
        <asp:BoundField DataField="Email" HeaderText="Email" SortExpression="Email" />
        <asp:BoundField DataField="JobID" HeaderText="JobID" SortExpression="JobID" />
        <asp:BoundField DataField="SupervisorID" HeaderText="Supervisor"
            SortExpression="SupervisorID" />
        <asp:TemplateField HeaderText="Hire Date" SortExpression="HireDate">
            <EditItemTemplate>
                <span class="input-type-text margin-right relative"><asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("HireDate","{0:d}") %>' CssClass="datepicker"></asp:TextBox><img src="images/icons/fugue/calendar-month.png" width="16" height="16"></span>
            </EditItemTemplate>
            <InsertItemTemplate>
                <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("HireDate","{0:d}") %>'></asp:TextBox>
            </InsertItemTemplate>
            <ItemTemplate>
                <asp:Label ID="Label1" runat="server" Text='<%# Bind("HireDate","{0:d}") %>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>

        <asp:TemplateField HeaderText="Status" SortExpression="Status">
            <EditItemTemplate>
                <asp:DropDownList ID="StatusList"  runat="server">

                </asp:DropDownList>
            </EditItemTemplate>
            <InsertItemTemplate>
                <asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("Status") %>'></asp:TextBox>
            </InsertItemTemplate>
            <ItemTemplate>
                <asp:Label ID="Label2" runat="server" Text='<%# Bind("Status") %>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>

    </Fields>
</asp:DetailsView>

<asp:SqlDataSource ID="SqlDataSource1" runat="server"
    ConnectionString="<%$ ConnectionStrings:dbConnectionString %>"
    DeleteCommand="DELETE FROM [Users] WHERE [ID] = @ID"
    InsertCommand="INSERT INTO [Users] ([ClientID], [UserName], [Password], [FirstName], [LastName], [Email], [JobID], [SupervisorID], [HireDate], [Status]) VALUES (@ClientID, @UserName, @Password, @FirstName, @LastName, @Email, @JobID, @SupervisorID, @HireDate, @Status)"
    ProviderName="<%$ ConnectionStrings:dbConnectionString.ProviderName %>"
    SelectCommand="SELECT [ID], [ClientID], [UserName], [Password], [FirstName], [LastName], [Email], [JobID], [SupervisorID], [HireDate], [Status] FROM [Users] WHERE [ID] = @ID"
    UpdateCommand="UPDATE [Users] SET [ClientID] = @ClientID, [UserName] = @UserName, [Password] = @Password, [FirstName] = @FirstName, [LastName] = @LastName, [Email] = @Email, [JobID] = @JobID, [SupervisorID] = @SupervisorID, [HireDate] = @HireDate, [Status] = @StatusList WHERE [ID] = @ID">
    <SelectParameters>
        <asp:QueryStringParameter Name="ID" QueryStringField="curEmp" Type="Int64" />
    </SelectParameters>

    <UpdateParameters>
        <asp:Parameter Name="ClientID" Type="Int64" />
        <asp:Parameter Name="UserName" Type="String" />
        <asp:Parameter Name="Password" Type="String" />
        <asp:Parameter Name="FirstName" Type="String" />
        <asp:Parameter Name="LastName" Type="String" />
        <asp:Parameter Name="Email" Type="String" />
        <asp:Parameter Name="JobID" Type="Double" />
        <asp:Parameter Name="SupervisorID" Type="Double" />
        <asp:Parameter Name="HireDate" Type="DateTime" />
        <asp:Parameter Name="StatusList" Type="String" />
        <asp:Parameter Name="ID" />
    </UpdateParameters>
</asp:SqlDataSource>

代码背后：

protected void DetailsView1_DataBound(object sender, EventArgs e)
    {


        if (DetailsView1.CurrentMode == DetailsViewMode.Edit)
        {

            DropDownList statusList = DetailsView1.FindControl("StatusList") as DropDownList;

            //Add list items (later to be added by database)

            if (statusList != null)
            {
                statusList.Items.Add(new ListItem("Select Status", ""));
                statusList.Items.Add(new ListItem("Active", "Active"));
                statusList.Items.Add(new ListItem("Inactive", "Inactive"));
                statusList.Items.Add(new ListItem("Terminated", "Terminated"));
                statusList.DataBind();
            }


            //Highlight selected item in dropdownlist while in edit mode

            DataRowView row = (DataRowView)DetailsView1.DataItem;
            ListItem liItem = statusList.Items.FindByText(row["Status"].ToString());
            if (liItem != null)
              {
                  statusList.Items.FindByText(row["Status"].ToString()).Selected = true;
              }

        }

    }

我不知道从哪里开始。我试图在我的SQLDataSource中为DropDownList（名为StatusList）更改Update命令，但没有任何运气。知道我在这里缺少什么吗？

感谢您的帮助！

Answer 1

我认为statusList不会绑定到您的数据源。您可能需要绑定aspx或数据源中的下拉列表。

所以，就像在aspx中一样...

<asp:DropDownList ID="statusList" runat="server" SelectedValue='<%# Bind("datafield") %>'>

或在数据源参数中......

<asp:ControlParameter Name="status" ControlID="DetailsView1$statusDropDownList" PropertyName="SelectedValue" Type="String" />

DetailsView DropDownList不更新

1 个答案: