循环通过ListBox并确定ListBox项目顺序/位置

时间:2014-09-10 05:45:18

标签: c# asp.net foreach listbox telerik

我有一个看起来像附图的ListBox。你可以看到Hasbro是ListBox中的第一个项目,然后是Matt,然后是Bif Ban,然后是Mike的Awesome Stuff。这些项是从SQL表生成的。在那个SQL表中我有一个listBox sort_order列,它只是每个项目被抛入listBox时出现的顺序。我编写了一个过程来更新包含项目的表,并将listBox sort_order设置为@sort_order。当我在listBox中移动项目并单击Update Sort Order按钮时,我想循环遍历listBox并将listBox sort_order设置为该项目在listBox中的当前位置。例如,Hasbro当前在listBox sort_order 1中,如果我将它移到底部(在Mike的真棒东西之后),那么它将在listBox sort_order 4中。我怎么能循环遍历每个项目并为其分配这个新的listBox sort_order数值?

我认为它会是这样的但是我无法获得int id和int sort_order值:

foreach (RadListBoxItem item in LBcarDetail.Items)
{
    int id; //how do I access this value? //this is the primary key from my SqlDataSource table
    int sort_order; //and this value? this would be the position in the listBox
 
    using (SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["iConnectionString"].ConnectionString))
    using (SqlCommand comm = new SqlCommand("sp_car_detail_updateSort", conn))
    {
        comm.CommandType = CommandType.StoredProcedure;
        comm.Parameters.Add(new SqlParameter("@id", id));
        comm.Parameters.Add(new SqlParameter("@sort_order", sort_order));
 
        conn.Open();
        comm.ExecuteNonQuery();
        conn.Close();
    }
}

这是我的RadListBox和SqlDataSource的样子:

<telerik:RadListBox ID="LBcarDetail" runat="server" DataSourceID="SqlDataSource1" AllowTransfer="true" AutoPostBackOnTransfer="true" OnSelectedIndexChanged="LBcarDetail_SelectedIndexChanged"
    Height="700px" SelectionMode="Multiple" Width="615px" Skin="Outlook" EnableDragAndDrop="true" AllowReorder="true" AppendDataBoundItems="true" AutoPostBack="true">
    <ButtonSettings VerticalAlign="Top" ShowTransferAll="false" ShowTransfer="false" ShowDelete="true"></ButtonSettings>
    <ItemTemplate>
        <div style="border: 1px solid black; margin-right: auto; margin-left: auto;">
            <ul class="details1" style="list-style: none;">
                <li>
                    <label>
                        display_text:
                    </label>
                    <span>
                        <%# Eval("display_text") %></span>
                </li>
            </ul>
        </div>
    </ItemTemplate>
</telerik:RadListBox>

<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:iConnectionString %>"
    SelectCommand="SELECT * FROM [intranet].[dbo].[TableItems] ORDER BY sort_order"></asp:SqlDataSource>

enter image description here

1 个答案:

答案 0 :(得分:0)

您可以使用的sort_order

sort_order = LBcarDetail.Items.IndexOf(item);