Question

我正在使用c＃功能更改文件夹图标。它工作正常，但问题是它第一次工作。我的意思是我无法更改已更改图标的文件夹的图标。以下是代码：

static void Main(string[] args)
{
    LPSHFOLDERCUSTOMSETTINGS FolderSettings = new LPSHFOLDERCUSTOMSETTINGS();
    FolderSettings.dwMask = 0x10;
    FolderSettings.pszIconFile = @"C:\Program Files (x86)\Common Files\TortoiseOverlays\icons\XPStyle\ModifiedIcon.ico";
    FolderSettings.iIconIndex = 0;

    UInt32 FCS_READ = 0x00000001;
    UInt32 FCS_FORCEWRITE = 0x00000002;
    UInt32 FCS_WRITE = FCS_READ | FCS_FORCEWRITE;

    string pszPath = @"D:\Downloaded Data";
    UInt32 HRESULT = SHGetSetFolderCustomSettings(ref FolderSettings, pszPath, FCS_WRITE);
    //Console.WriteLine(HRESULT.ToString("x"));
    //Console.ReadLine();

}

[DllImport("Shell32.dll", CharSet = CharSet.Auto)]
static extern UInt32 SHGetSetFolderCustomSettings(ref LPSHFOLDERCUSTOMSETTINGS pfcs, string pszPath, UInt32 dwReadWrite);

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
struct LPSHFOLDERCUSTOMSETTINGS
{
    public UInt32 dwSize;
    public UInt32 dwMask;
    public IntPtr pvid;
    public string pszWebViewTemplate;
    public UInt32 cchWebViewTemplate;
    public string pszWebViewTemplateVersion;
    public string pszInfoTip;
    public UInt32 cchInfoTip;
    public IntPtr pclsid;
    public UInt32 dwFlags;
    public string pszIconFile;
    public UInt32 cchIconFile;
    public int iIconIndex;
    public string pszLogo;
    public UInt32 cchLogo;
}

可能是什么原因？

Answer 1

我遇到过类似的问题。只需在第二次调用该函数之前删除desktop.ini文件。如果要清除文件夹图标，则使用相同的方案：

删除desktop.ini。
忽略以下几行：

...

FolderSettings.pszIconFile = @"{icon path}";
FolderSettings.iIconIndex = 0;

...

Answer 2

只是为了完成，有问题的代码看起来没问题，但是第三个参数 SHGetSetFolderCustomSettings调用必须是FCS_FORCEWRITE才能更改设置（如果已存在）。（如果值尚未存在，FCS_WRITE将仅设置它）

查看有关该参数的文档： http://msdn.microsoft.com/en-us/library/windows/desktop/bb762199(v=vs.85).aspx

Answer 3

只需更改

UInt32 FCS_WRITE = FCS_READ | FCS_FORCEWRITE;

到

UInt32 FCS_WRITE = FCS_FORCEWRITE;

下次运行FCS_WRITE = FCS_READ时，它不会写agian。

文件夹图标更改

3 个答案: