DataGridView排序不起作用

Question

Visual Studio 2010 VB.NET

我有一个DataGridView.DataSource设置为自定义对象的集合.列使用自定义对象中的只读属性进行显示,此对话框仅供显示.这些属性都返回String对象.我将列中的所有列设置为自动排序模式(未设置的列是按钮或复选框).但它没有排序.我google了,大多数人使用sql或绑定源,但我使用的是一个简单的vb集合.有人说我应该实现IComparable但不是String已经IComparable？

任何帮助,将不胜感激？

感谢名单

Bodger

根据请求,这里有一些代码片段.

此方法从我在设计器中设计的列中详细定义列.

列名称称为pSelected或pCustomer,并与列定义所关联的属性对应.

Protected Sub UpdateDGVUS()
        If Not USColumnsInitted Then
            USColumnsInitted = True

            dgvUS.AutoGenerateColumns = False
            dgvUS.Columns.Clear()

            Dim iIdx As Integer

            iIdx = 0

            dgvUS.Columns.Insert(iIdx, Me.pSelected)
            dgvUS.Columns("pSelected").DisplayIndex = iIdx
            dgvUS.Columns("pSelected").SortMode = DataGridViewColumnSortMode.Automatic
            iIdx = iIdx + 1

            dgvUS.Columns.Insert(iIdx, Me.pCustomer)
            dgvUS.Columns("pCustomer").DisplayIndex = iIdx
            dgvUS.Columns("pCustomer").SortMode = DataGridViewColumnSortMode.Automatic
            iIdx = iIdx + 1

            dgvUS.Columns.Insert(iIdx, Me.pDetails)
            dgvUS.Columns("pDetails").DisplayIndex = iIdx
            dgvUS.Columns("pDetails").SortMode = DataGridViewColumnSortMode.Automatic
            iIdx = iIdx + 1

            dgvUS.Columns.Insert(iIdx, Me.pSelectCustomerInvoice)
            dgvUS.Columns("pSelectCustomerInvoice").DisplayIndex = iIdx
            iIdx = iIdx + 1

            dgvUS.Columns.Insert(iIdx, Me.pDate)
            dgvUS.Columns("pDate").DisplayIndex = iIdx
            dgvUS.Columns("pDate").SortMode = DataGridViewColumnSortMode.Automatic
            iIdx = iIdx + 1

            dgvUS.Columns.Insert(iIdx, Me.pAmount)
            dgvUS.Columns("pAmount").DisplayIndex = iIdx
            dgvUS.Columns("pAmount").DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleRight
            dgvUS.Columns("pAmount").SortMode = DataGridViewColumnSortMode.Automatic
            iIdx = iIdx + 1

            dgvUS.Columns.Insert(iIdx, Me.pName)
            dgvUS.Columns("pName").DisplayIndex = iIdx
            dgvUS.Columns("pName").SortMode = DataGridViewColumnSortMode.Automatic
            iIdx = iIdx + 1

            dgvUS.Columns.Insert(iIdx, Me.pPayment)
            dgvUS.Columns("pPayment").DisplayIndex = iIdx
            dgvUS.Columns("pPayment").SortMode = DataGridViewColumnSortMode.Automatic
            iIdx = iIdx + 1

            dgvUS.Columns.Insert(iIdx, Me.pCompany)
            dgvUS.Columns("pCompany").DisplayIndex = iIdx
            dgvUS.Columns("pCompany").SortMode = DataGridViewColumnSortMode.Automatic
            iIdx = iIdx + 1

            dgvUS.Columns.Insert(iIdx, Me.pType)
            dgvUS.Columns("pType").DisplayIndex = iIdx
            dgvUS.Columns("pType").SortMode = DataGridViewColumnSortMode.Automatic
            iIdx = iIdx + 1

            dgvUS.Columns.Insert(iIdx, Me.pDescription)
            dgvUS.Columns("pDescription").DisplayIndex = iIdx
            dgvUS.Columns("pDescription").SortMode = DataGridViewColumnSortMode.Automatic
            iIdx = iIdx + 1

            dataUpdatedUS()
        End If
    End Sub

这是集合中自定义对象的片段

Public Class ItemXact01
    Public Property FirstName As String
    Public Property LastName As String
    Public Property Company As String
    Public Property Type As String
    Public Property Description As String
    Public Property RefNumber As String
    Public Property DownloadID As String
    Public Property Selected As Boolean
    Public Property RequestID As Integer

    ...

    Public ReadOnly Property pCompany As String
        Get
            pCompany = Company
        End Get
    End Property

    Public ReadOnly Property pType As String
        Get
            pType = Type
        End Get
    End Property

    Public ReadOnly Property pDescription As String
        Get
            pDescription = Description
        End Get
    End Property

    Public ReadOnly Property pSelected As Boolean
        Get
            pSelected = Selected
        End Get
    End Property

...

数据通过此代码实现

    Private Sub dataUpdateDGV(ByRef dgv As DataGridView, ByRef myCollection As Collection)
        myMain.Log("dataUpdatedDGV: 001 :" & dgv.RowCount & ":" & myCollection.Count & ":")

' for some reason the not equal to does not show in the next line

        If dgv.RowCount  myCollection.Count Then
            myMain.Log("dataUpdatedDGV: 002")

            dgv.DataSource = Nothing
            If myCollection.Count > 0 Then
                myMain.Log("dataUpdatedDGV: 003")

                dgv.DataSource = myCollection
            End If
        End If

        myMain.Log("dataUpdatedDGV: 004")

        dgv.Invalidate()
        dgv.Update()
        dgv.Refresh()

        myMain.Log("dataUpdatedDGV: OUT")
    End Sub

Answer 1

如果我没记错的话，您可以在集合和 datagridview 之间放置一个绑定源，并且绑定源将提供一系列功能。我认为它也可以让你排序。这一切都在我的脑海中，因为我现在无法测试它。