如何获取ListView的标题栏高度

Question

请问如何获取 ListView 的标题栏高度？

- Brad

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这是WinForms、WCF还是ASP.NET？ - Robert Wagner

Answer 1

这可能有点笨拙，但你可以这样做：

listView.Items[0].Bounds.Top

如果列表中只有一个项目，这个方法才能生效。因此，您可能希望在创建列表时先暂时添加一个项目并保留高度值。

另外，您也可以使用以下方法：

listView.TopItem.Bounds.Top

为了随时进行测试，但仍需要列表中至少有一项。

- Coincoin

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结果发现，如果该项滚动出可见区域，则此方法将无法正常工作。 - EricLaw

Answer 2

以下是使用Win32 Interop调用获取listview头部高度的方法。

[Serializable, StructLayout(LayoutKind.Sequential)]
public struct RECT 
{
    public int Left;
    public int Top;
    public int Right;
    public int Bottom;
}

const long LVM_FIRST = 0x1000;
const long LVM_GETHEADER = (LVM_FIRST + 31);

[DllImport("user32.dll", EntryPoint="SendMessage")]
private static extern IntPtr SendMessage(IntPtr hwnd, long wMsg, long wParam, long lParam);

[DllImport("user32.dll")]
private static extern bool GetWindowRect(HandleRef hwnd, out RECT lpRect);

RECT rc = new RECT();
IntPtr hwnd = SendMessage(ListView1.Handle, LVM_GETHEADER, 0, 0);
if (hwnd != null) 
{
    if (GetWindowRect(new HandleRef(null, hwnd), out rc)) 
    {
        int headerHeight = rc.Bottom - rc.Top;
    }
}

- Fistandantilus

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这里的wParam和lParam也应该是IntPtr才能在x64上正常工作，虽然你传递的是零，但有人会将其复制/粘贴到可能需要的地方。 - EricLaw

Answer 3

@Phaedrus

很久很久以前..但是:

会调用PInvokeStackImbalance

SendMessage的签名为(long != Uint32):

LRESULT WINAPI SendMessage(
    _In_  HWND hWnd,
    _In_  UINT Msg,
    _In_  WPARAM wParam,
    _In_  LPARAM lParam
)

将所有内容更改为：

const UInt32 LVM_FIRST = 0x1000;
const UInt32 LVM_GETHEADER = (LVM_FIRST + 31);

[Serializable, System.Runtime.InteropServices.StructLayout(System.Runtime.InteropServices.LayoutKind.Sequential)]
public struct RECT
{
    public int Left;
    public int Top;
    public int Right;
    public int Bottom;
}

[System.Runtime.InteropServices.DllImport("user32.dll", CharSet = System.Runtime.InteropServices.CharSet.Auto)]
    static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, IntPtr lParam);
[System.Runtime.InteropServices.DllImport("user32.dll")]
private static extern bool GetWindowRect(System.Runtime.InteropServices.HandleRef hwnd, out RECT lpRect);

int youtFuncToGetHeaderHeight()
{
    RECT rc = new RECT();
    IntPtr hwnd = SendMessage((IntPtr)this.Handle, LVM_GETHEADER, IntPtr.Zero, IntPtr.Zero);
    if (hwnd != null)
    {
        if (GetWindowRect(new System.Runtime.InteropServices.HandleRef(null, hwnd), out rc))
        {
            int headerHeight = rc.Bottom - rc.Top;
        }
    }
    return -1;
}

- raiserle

Answer 4

正确的代码：

        [Serializable, StructLayout(LayoutKind.Sequential)]
    public struct RECT 
    {
        public int Left;
        public int Top;
        public int Right;
        public int Bottom;
    }

    const int LVM_FIRST = 0x1000;
    const int LVM_GETHEADER = (LVM_FIRST + 31);

    [DllImport("user32.dll", EntryPoint="SendMessage")]
    private static extern IntPtr SendMessage(IntPtr hwnd, int wMsg, IntPtr wParam, IntPtr lParam);

    [DllImport("user32.dll")]
    private static extern bool GetWindowRect(HandleRef hwnd, out RECT lpRect);

    RECT rc = new RECT();
    IntPtr hwnd = SendMessage(ListView1.Handle, LVM_GETHEADER, 0, 0);
    if (hwnd != null) 
    {
        if (GetWindowRect(new HandleRef(null, hwnd), out rc)) 
        {
            int headerHeight = rc.Bottom - rc.Top;
        }
    }

- Martin.Martinsson

Answer 5

我已验证此方法适用于我的Win32++应用程序：

CHeader* hdr = GetHeader();
CRect rcHdr = hdr->GetWindowRect();

标题高度是 rcHdr.Height()

- Casey Sheehan