过滤数据表中的值以转移到另一个数据表

时间:2014-07-02 02:38:46

标签: c# asp.net listview datatable

我有一个数据表,它有一个复选框和一个值,我想要的是,当我点击一个按钮时,它将获得所有选中的框及其相应的值,并将它们添加到空白的数据表中。我不打算将从1个列表移动到另一个列表的数据保存到另一个列表中,因为还有另一个功能可以确认我是否要保存更改(在此问题中未被询问)。

这是我的HTML代码:

  <asp:ListView runat="server" ID="uoListViewAirportSaved" EmptyDataText="No Data Found">
                <LayoutTemplate>
                <table border="0" cellpadding="0" cellspacing="0" width="500px">
                    <tr>
                       <th runat="server">&nbsp;</th>
                    <th runat="server">Airport</th>
                    </tr>
                    <asp:PlaceHolder runat="server" ID="itemPlaceHolder"></asp:PlaceHolder>
                </table>
            </LayoutTemplate>
            <ItemTemplate>
                <tr>
                    <td class="leftAligned">
                             <asp:CheckBox ID="uoCheckBoxSelect" runat="server" />
                    </td>
                    <td class="leftAligned">
                                <asp:HiddenField ID="uoHiddenFieldAirport" runat="server" Value='<%# Eval("ColAirportCodeVarchar") %>' />
                                <asp:Label ID="uoLabelAirport" runat="server" Text='<%# Eval("colAirportFullName")%>' />                         
                    </td>
                </tr>
            </ItemTemplate>
            <EmptyDataTemplate>
                <table border="0" cellpadding="0" cellspacing="0"  width="500px">
                    <tr>
                        <td>Airport</td>
                    </tr>
                    <tr>
                        <td colspan="3" class="leftAligned">No Record</td>
                    </tr>
                </table>
            </EmptyDataTemplate>                
            </asp:ListView>

单击添加按钮时的代码:

    private void AddAirport() {
        CheckBox uoCheckBoxSelect;
        HiddenField uoHiddenFieldAirport;
        Label uoLabelAirport;

        DataTable dt = new DataTable();
        DataTable dt2 = new DataTable();

        DataTable dt3 = new DataTable();

        string serviceProvider = GlobalCode.Field2String(Request.QueryString["pid"]);
        ///datatable with all list of airports
        dt = VendorMaintenanceBLL.GetServiceProviderAirportbyBrand(serviceProvider);
        ///datatable with provider's current airports
        dt2 = VendorMaintenanceBLL.GetServiceProviderAirportbyVendor(serviceProvider);


        foreach(ListViewItem item in uoListViewAirport.Items)
        {
            uoCheckBoxSelect = (CheckBox)item.FindControl("uoCheckBoxSelect");
            if (uoCheckBoxSelect.Checked == true)
            {
                uoHiddenFieldAirport = (HiddenField)item.FindControl("uoHiddenFieldAirport");
                uoLabelAirport = (Label)item.FindControl("uoLabelAirport");

                /// my new list should contain  the values from the checked values of the checkboxes
                        ???

            }
        }

    }

我的数据表包含AirportID和AirportStringName列。

我找到了一个我试图以逻辑方式复制的代码。但它是专为列表而设计的:

            List<AirportDTO> listToBeAdded = new List<AirportDTO>();
    List<AirportDTO> listAdded = new List<AirportDTO>();

    listToBeAdded = GetAirportNotInUser(false, false);
    listAdded = GetAirportInUser(false);

    foreach (ListViewItem item in uoListViewAirport.Items)
    {
        uoCheckBoxSelect = (CheckBox)item.FindControl("uoCheckBoxSelect");
        if (uoCheckBoxSelect.Checked == true)
        {
            uoHiddenFieldAirport = (HiddenField)item.FindControl("uoHiddenFieldAirport");
            uoLabelAirport = (Label)item.FindControl("uoLabelAirport");

            var listToAdd = (from a in listToBeAdded
                             where a.AirportIDString == GlobalCode.Field2String(uoHiddenFieldAirport.Value)
                             select new
                             {
                                 AirportID = a.AirportIDString,
                                 AirportName = a.AirportNameString,
                             }).ToList();
        }
    }

我不知道如何从数据表中获取必要的数据,因为它与列表不同。有没有办法让我对DataTables做同样的事情就像处理列表一样。

1 个答案:

答案 0 :(得分:0)

由于我昨天确实需要解决问题,所以我决定采取以下措施。

我所做的只是基本的循环,然后在里面比较每一行,然后只使用Datatable.ImportRowDataTable.RemoveAt。我还为更改的列表添加了一个临时数据表。

        foreach(ListViewItem item in uoListViewAirport.Items)
        {

            uoCheckBoxSelect = (CheckBox)item.FindControl("uoCheckBoxSelect");
            if (uoCheckBoxSelect.Checked == true)
            {
                uoHiddenFieldAirport = (HiddenField)item.FindControl("uoHiddenFieldAirport");
                uoLabelAirport = (Label)item.FindControl("uoLabelAirport");

               string  HiddenFieldAirport = GlobalCode.Field2String(uoHiddenFieldAirport.Value);

               for (var f = 0; f < dt.Rows.Count; f++ )
               {

                   if (dt.Rows[f]["colAirportIDInt"].ToString() == HiddenFieldAirport)
                   {   
                       dt3.ImportRow(dt.Rows[f]);
                       dt.Rows.RemoveAt(f);
                   }
               }

            }

        }

代码很脏,而且我也必须对它进行排序,但由于我真的需要它,我可以用它做。