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如何在遵循操作系统本机外观的列表视图中的已排序列的标题中显示排序箭头？

4

4 回答 4

73

您可以使用以下扩展方法将排序箭头设置为特定列：

[EditorBrowsable(EditorBrowsableState.Never)]
public static class ListViewExtensions
{
    [StructLayout(LayoutKind.Sequential)]
    public struct HDITEM
    {
        public Mask mask;
        public int cxy;
        [MarshalAs(UnmanagedType.LPTStr)] public string pszText;
        public IntPtr hbm;
        public int cchTextMax;
        public Format fmt;
        public IntPtr lParam;
        // _WIN32_IE >= 0x0300 
        public int iImage;
        public int iOrder;
        // _WIN32_IE >= 0x0500
        public uint type;
        public IntPtr pvFilter;
        // _WIN32_WINNT >= 0x0600
        public uint state;

        [Flags]
        public enum Mask
        {
            Format = 0x4,       // HDI_FORMAT
        };

        [Flags]
        public enum Format
        {
            SortDown = 0x200,   // HDF_SORTDOWN
            SortUp = 0x400,     // HDF_SORTUP
        };
    };

    public const int LVM_FIRST = 0x1000;
    public const int LVM_GETHEADER = LVM_FIRST + 31;

    public const int HDM_FIRST = 0x1200;
    public const int HDM_GETITEM = HDM_FIRST + 11;
    public const int HDM_SETITEM = HDM_FIRST + 12;

    [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    public static extern IntPtr SendMessage(IntPtr hWnd, UInt32 msg, IntPtr wParam, IntPtr lParam);

    [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    public static extern IntPtr SendMessage(IntPtr hWnd, UInt32 msg, IntPtr wParam, ref HDITEM lParam);

    public static void SetSortIcon(this ListView listViewControl, int columnIndex, SortOrder order)
    {
        IntPtr columnHeader = SendMessage(listViewControl.Handle, LVM_GETHEADER, IntPtr.Zero, IntPtr.Zero);
        for (int columnNumber = 0; columnNumber <= listViewControl.Columns.Count - 1; columnNumber++)
        {
            var columnPtr = new IntPtr(columnNumber);
            var item = new HDITEM
                {
                    mask = HDITEM.Mask.Format
                };

            if (SendMessage(columnHeader, HDM_GETITEM, columnPtr, ref item) == IntPtr.Zero)
            {
                throw new Win32Exception();
            }

            if (order != SortOrder.None && columnNumber == columnIndex)
            {
                switch (order)
                {
                    case SortOrder.Ascending:
                        item.fmt &= ~HDITEM.Format.SortDown;
                        item.fmt |= HDITEM.Format.SortUp;
                        break;
                    case SortOrder.Descending:
                        item.fmt &= ~HDITEM.Format.SortUp;
                        item.fmt |= HDITEM.Format.SortDown;
                        break;
                }
            }
            else
            {
                item.fmt &= ~HDITEM.Format.SortDown & ~HDITEM.Format.SortUp;
            }

            if (SendMessage(columnHeader, HDM_SETITEM, columnPtr, ref item) == IntPtr.Zero)
            {
                throw new Win32Exception();
            }
        }
    }
}

然后，您可以像这样调用扩展方法：

myListView.SetSortIcon(0, SortOrder.Ascending);

它通过使用 P/Invoke 来工作：

这是它的样子：

列表视图列上的箭头

于 2008-10-31T16:38:00.710 回答
7

安德鲁的回答很好。如果有人在这里寻找 VB.net 等价物，它是：

Public Module ListViewExtensions
    Public Enum SortOrder
        None
        Ascending
        Descending
    End Enum

    <StructLayout(LayoutKind.Sequential)>
    Public Structure HDITEM
        Public theMask As Mask
        Public cxy As Integer
        <MarshalAs(UnmanagedType.LPTStr)>
        Public pszText As String
        Public hbm As IntPtr
        Public cchTextMax As Integer
        Public fmt As Format
        Public lParam As IntPtr
        ' _WIN32_IE >= 0x0300 
        Public iImage As Integer
        Public iOrder As Integer
        ' _WIN32_IE >= 0x0500
        Public type As UInteger
        Public pvFilter As IntPtr
        ' _WIN32_WINNT >= 0x0600
        Public state As UInteger

        <Flags()>
        Public Enum Mask
            Format = &H4       ' HDI_FORMAT
        End Enum


        <Flags()>
        Public Enum Format
            SortDown = &H200 ' HDF_SORTDOWN
            SortUp = &H400     ' HDF_SORTUP
        End Enum
    End Structure

    Public Const LVM_FIRST As Integer = &H1000
    Public Const LVM_GETHEADER As Integer = LVM_FIRST + 31

    Public Const HDM_FIRST As Integer = &H1200
    Public Const HDM_GETITEM As Integer = HDM_FIRST + 11
    Public Const HDM_SETITEM As Integer = HDM_FIRST + 12

    <DllImport("user32.dll", CharSet:=CharSet.Auto, SetLastError:=True)>
    Public Function SendMessage(hWnd As IntPtr, msg As UInt32, wParam As IntPtr, lParam As IntPtr) As IntPtr
    End Function

    <DllImport("user32.dll", CharSet:=CharSet.Auto, SetLastError:=True)>
    Public Function SendMessage(hWnd As IntPtr, msg As UInt32, wParam As IntPtr, ByRef lParam As HDITEM) As IntPtr
    End Function

    <Extension()>
    Public Sub SetSortIcon(listViewControl As ListView, columnIndex As Integer, order As SortOrder)
        Dim columnHeader As IntPtr = SendMessage(listViewControl.Handle, LVM_GETHEADER, IntPtr.Zero, IntPtr.Zero)
        For columnNumber As Integer = 0 To listViewControl.Columns.Count - 1

            Dim columnPtr As New IntPtr(columnNumber)
            Dim item As New HDITEM

            item.theMask = HDITEM.Mask.Format

            If SendMessage(columnHeader, HDM_GETITEM, columnPtr, item) = IntPtr.Zero Then Throw New Win32Exception

            If order <> SortOrder.None AndAlso columnNumber = columnIndex Then
                Select Case order
                    Case SortOrder.Ascending
                        item.fmt = item.fmt And Not HDITEM.Format.SortDown
                        item.fmt = item.fmt Or HDITEM.Format.SortUp
                    Case SortOrder.Descending
                        item.fmt = item.fmt And Not HDITEM.Format.SortUp
                        item.fmt = item.fmt Or HDITEM.Format.SortDown
                End Select
            Else
                item.fmt = item.fmt And Not HDITEM.Format.SortDown And Not HDITEM.Format.SortUp
            End If

            If SendMessage(columnHeader, HDM_SETITEM, columnPtr, item) = IntPtr.Zero Then Throw New Win32Exception
        Next
    End Sub
End Module
于 2014-11-17T14:01:14.247 回答
4

对于任何其他懒惰的 C++ 程序员（比如我）：

// possible sorting header icons / indicators
enum class ListViewSortArrow { None, Ascending, Descending };

BOOL LVHeader_SetSortArrow(HWND hHeader, int nColumn, ListViewSortArrow sortArrow)
{
    ASSERT(hHeader);

    HDITEM hdrItem = { 0 };
    hdrItem.mask = HDI_FORMAT;
    if (Header_GetItem(hHeader, nColumn, &hdrItem))
    {
        switch (sortArrow)
        {
        default:
            ASSERT(false);
        case ListViewSortArrow::None:
            hdrItem.fmt = hdrItem.fmt & ~(HDF_SORTDOWN | HDF_SORTUP);
            break;
        case ListViewSortArrow::Ascending:
            hdrItem.fmt = (hdrItem.fmt & ~HDF_SORTDOWN) | HDF_SORTUP;
            break;
        case ListViewSortArrow::Descending:
            hdrItem.fmt = (hdrItem.fmt & ~HDF_SORTUP) | HDF_SORTDOWN;
            break;
        }

        return Header_SetItem(hHeader, nColumn, &hdrItem);
    }

    return FALSE;
}

BOOL ListView_SetSortArrow(HWND hListView, int nColumn, ListViewSortArrow sortArrow)
{
    ASSERT(hListView);

    if (HWND hHeader = ListView_GetHeader(hListView))
        return LVHeader_SetSortArrow(hHeader, nColumn, sortArrow);

    return FALSE;
}
于 2017-07-25T17:37:53.940 回答
4

您可以妥协并使用看起来像箭头的字符，而不是弄乱 Windows API（我使用charmap 选择了它们）

private void SetSortArrow(ColumnHeader head, SortOrder order)
{
    const string ascArrow = " ▲";
    const string descArrow = " ▼";

    // remove arrow
    if(head.Text.EndsWith(ascArrow) || head.Text.EndsWith(descArrow))
        head.Text = head.Text.Substring(0, head.Text.Length-2);

    // add arrow
    switch (order)
    {
        case SortOrder.Ascending: head.Text += ascArrow; break;
        case  SortOrder.Descending: head.Text += descArrow; break;
    }
}

SetSortArrow(listView1.Columns[0], SortOrder.None);       // remove arrow from first column if present
SetSortArrow(listView1.Columns[1], SortOrder.Ascending);  // set second column arrow to ascending
SetSortArrow(listView1.Columns[1], SortOrder.Descending); // set second column arrow to descending
于 2019-04-06T13:40:51.330 回答