Question

如何在一个数据网格单元格中放置多个数据？例如，用户可以是不同组织的成员。

但我不希望该表为同一个用户创建一个新的数据网格行，该用户是多个组织的成员。

这就是代码现在的样子：

Dim dSourceMemberOf As New SqlDataAdapter("QUERY", dbConn)

这会填充数据网格，但对于某些用户，则有超过5行。所以我想把一个特定的列放在一个单元格中的所有数据中。

如何做到这一点？

编辑：

这就是现在的样子：

username    memberof 
user1       dft 
user1       kbo 
user2       test

这就是我想要它的方式：

username   memberof 
user1      dft
           kbo 
user2      test

Answer 1

我认为最好的解决方案是使用Linq查询对数据进行分组，然后将分组数据绑定到gridview：

所以GridView看起来像这样：

    <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False">
    <Columns>
        <asp:BoundField DataField="UserName" />
        <asp:TemplateField>
            <ItemTemplate>
                <asp:ListBox ID="lst" runat="server" DataSource="<%# Container.DataItem.MemberOfGrouped %>" DataTextField="MemberOf"></asp:ListBox>
            </ItemTemplate>

        </asp:TemplateField>
    </Columns>
</asp:GridView>

以下是填充它的一些示例代码：

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

    Dim UngroupedData As List(Of YourData) = New List(Of YourData)()
    Dim item1 As YourData = New YourData()
    item1.MemberOf = "dft"
    item1.UserName = "user1"
    UngroupedData.Add(item1)

    Dim item2 As YourData = New YourData()
    item2.MemberOf = "kbo"
    item2.UserName = "user1"
    UngroupedData.Add(item2)

    Dim grouped = From u In UngroupedData Group u By Key = u.UserName Into Group _
                  Select UserName = Key, MemberOfGrouped = Group.ToList()


    GridView1.DataSource = grouped
    GridView1.DataBind()
End Sub


Public Class YourData

    Private _userName As String
    Public Property UserName() As String
        Get
            Return _userName
        End Get
        Set(ByVal value As String)
            _userName = value
        End Set
    End Property


    Private _memberOf As String
    Public Property MemberOf() As String
        Get
            Return _memberOf
        End Get
        Set(ByVal value As String)
            _memberOf = value
        End Set
    End Property
End Class

Answer 2

对不起，我认为油漆错了，概念是正确的 - 看起来你需要在databind event事件上做... more here（前三个链接会告诉你怎么做我认为你需要什么） - 你可以查看你所在的行，获取前一行，然后根据prev行决定如何处理当前行中的单元格

Answer 3

您可以在GridView-Cell中使用一个表（或者像Ross Scott建议的那样使用Listbox）。

<ItemTemplate>
    <asp:table id="TblUserGroups" runat="server" Height="100%" Width="100%" CellSpacing="0" CellPadding="0">
    </asp:table> 
</ItemTemplate>

并且在gridview的RowDataBound中（Datagrid的ItemDataBound工作方式类似）：

Protected Sub Gridview1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles Gridview1.RowDataBound
    Select Case e.Row.RowType
        Case DataControlRowType.DataRow
            Dim drUser As DataRowView = DirectCast(e.Row.DataItem, DataRowView)
            Dim TblUserGroups As Table = DirectCast(e.Row.FindControl("TblUserGroups"), Table)
            Dim userID as int32 = Ctype(drUser(0), Int32)
            Dim tblGroups as DataTable = getTblUserGroups(userID) 'write a function that returns the Groups of a given User f.e. as DataTable'
            If tblGroups.Rows.Count = 0 Then
                Dim tr As New TableRow
                Dim td As New TableCell
                Dim LblNoGroup As New Label
                LblNoGroup .Text = "no user-group"
                td.CssClass = "UserWithoutGroup"
                td.Controls.Add(LblNoGroup)
                tr.Cells.Add(td)
                TblUserGroups.Rows.Add(tr)
            Else
                For Each groupRow As DataRow In tblGroups.Rows
                    Dim tr As New TableRow
                    Dim td As New TableCell
                    Dim LblGroup As New Label
                    LblGroup.Text = groupRow("GroupName").ToString 'The groups name column'
                    td.Controls.Add(LblGroup)
                    tr.Cells.Add(td)
                    TblUserGroups.Rows.Add(tr)
                Next
            End If
    End Select
End Sub

我认为这是最灵活的方式。

将多个数据放在ASP.NET，VB.NET的一个单元格中

3 个答案: