C#：OLE 文件的最大文件名长度

发布于 2024-09-29 11:27:24 字数 1687 浏览 6 评论 0原文

我使用 WinAPI 函数在 C# 中创建 OLE 文件。 WinAPI 函数是：

   [DllImport("ole32.dll")]
    public static extern int OleCreateFromFile(
        [In] ref Guid rclsid,
        [MarshalAs(UnmanagedType.LPWStr)] string lpszFileName,
        [In] ref Guid riid, uint renderopt,
        [In] IntPtr pFormatEtc,
        IOleClientSite pClientSite,
        IStorage pStg,
        [MarshalAs(UnmanagedType.IUnknown)] out object ppvObj);

我在 C# 应用程序中使用了这个函数，如下所示：

     hResult = OleAPI.OleCreateFromFile(ref clsid,
                                            sourceFileFullPath,
                                            ref IID_IOleObject,
                                            (uint)OLERENDER.OLERENDER_DRAW,
                                            IntPtr.Zero,
                                            pOleClientSite,
                                            pStorage,
                                            out pOleObjectOut);

该函数工作完美。但当文件名长度为140时，创建OLE文件失败。 hResult的返回值为-2147467259。

的价值 sourceFileFullPath="C:\Users\Administrator\AppData\Local\Temp\TmpTzStore1\pju3wswj.jmq\000008F6\CalendarRepeddsfsfdsfsfat344Issue5sdfdfsfsfdsfdsfsdsdfdsfsf00kbCalendarRepeatIssue500kbCalendarRepeatIssue 500kbCalendarRepeatIssue500kb.xlsx"

文件名的长度 (CalendarRepeddsfsfdsfsfat344Issue5sdfdfsfsfdsfdsfsdsdfdsfsf00kbCalendarRepeatIssue500kbCalendarRepeatIssue500kbCalendarRepeatIssue500kb。 xlsx) 是 140。

但是当我将文件名修剪为 120 时，它起作用了。

我想知道 OLE 文件的文件名长度是否有任何限制。因为我尝试了不同的应用程序文件（doc、docx、txt、pdf...）。不同文件的结果有所不同。

我不知道这个 API 支持的文件名长度到底是多少。或者它取决于操作系统？我正在使用 Windows Server 2008。

谢谢普拉卡什

原文

I used WinAPI function to create OLE file in C#. The WinAPI function is:

   [DllImport("ole32.dll")]
    public static extern int OleCreateFromFile(
        [In] ref Guid rclsid,
        [MarshalAs(UnmanagedType.LPWStr)] string lpszFileName,
        [In] ref Guid riid, uint renderopt,
        [In] IntPtr pFormatEtc,
        IOleClientSite pClientSite,
        IStorage pStg,
        [MarshalAs(UnmanagedType.IUnknown)] out object ppvObj);

I used this function in C# application as below:

     hResult = OleAPI.OleCreateFromFile(ref clsid,
                                            sourceFileFullPath,
                                            ref IID_IOleObject,
                                            (uint)OLERENDER.OLERENDER_DRAW,
                                            IntPtr.Zero,
                                            pOleClientSite,
                                            pStorage,
                                            out pOleObjectOut);

The function works perfectly.
But when the length of filename of the file is 140, it failed to create OLE file. The return value of hResult is -2147467259.

The value of
sourceFileFullPath="C:\Users\Administrator\AppData\Local\Temp\TmpTzStore1\pju3wswj.jmq\000008F6\CalendarRepeddsfsfdsfsfat344Issue5sdfdfsfsfdsfdsfsdsdfdsfsf00kbCalendarRepeatIssue500kbCalendarRepeatIssue500kbCalendarRepeatIssue500kb.xlsx"

The length of filename (CalendarRepeddsfsfdsfsfat344Issue5sdfdfsfsfdsfdsfsdsdfdsfsf00kbCalendarRepeatIssue500kbCalendarRepeatIssue500kbCalendarRepeatIssue500kb.xlsx) is 140.

But when I trimmed the file name to 120, it worked.

I wanted to know if there is any limitation in the filename length for OLE file.
Since I tried it for different application files( doc,docx,txt,pdf...). The results varied for different files.

I don't know what is the exact the file name length that this API supports. Or it is dependent on the OS? I am using Windows Server 2008.

Thanks
Prakash

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