TreeView複選框無法正確顯示

Question

我需要一些幫助，帶有複選框TreeView，因爲在隱藏父節點的複選框並將其僅留給它們顯示爲切入的子節點。 樹形視圖看起來是這樣的：

我使用隱藏父節點的複選框的代碼是這樣的：

private const int TVIF_STATE = 0x8; 
private const int TVIS_STATEIMAGEMASK = 0xF000; 
private const int TV_FIRST = 0x1100; 
private const int TVM_SETITEM = TV_FIRST + 63; 

[StructLayout(LayoutKind.Sequential, Pack = 8, CharSet = CharSet.Auto)] 
private struct TVITEM 
{ 
    public int mask; 
    public IntPtr hItem; 
    public int state; 
    public int stateMask; 
    [MarshalAs(UnmanagedType.LPTStr)] 
    public string lpszText; 
    public int cchTextMax; 
    public int iImage; 
    public int iSelectedImage; 
    public int cChildren; 
    public IntPtr lParam; 
} 

[DllImport("user32.dll", CharSet = CharSet.Auto)] 
private static extern IntPtr SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, ref TVITEM lParam); 

/// <summary> 
/// Hides the checkbox for the specified node on a TreeView control. 
/// </summary> 
private void HideCheckBox(TreeView tvw, TreeNode node) 
{ 
    TVITEM tvi = new TVITEM(); 
    tvi.hItem = node.Handle; 
    tvi.mask = TVIF_STATE; 
    tvi.stateMask = TVIS_STATEIMAGEMASK; 
    tvi.state = 0; 
    SendMessage(tvw.Handle, TVM_SETITEM, IntPtr.Zero, ref tvi); 
} 

void sharedFolders_DrawNode(object sender, DrawTreeNodeEventArgs e) 
{ 
    if (e.Node.Level == 1 || e.Node.Level == 0) 
     HideCheckBox(sharedFolders, e.Node); 
    e.DrawDefault = true; 
} 

誰能幫助我顯示完整的複選框？

Answer 1

試着改變你的TreeViewDrawMode到OwnerDrawAll：

sharedFolders.DrawMode = TreeViewDrawMode.OwnerDrawAll;