我如何从Microsoft.SharePoint.Client.File对象获得文件大小?

本文关键字：对象文件大小 File Client Microsoft SharePoint | 更新日期: 2023-09-27 18:16:42

我正在寻找一种从Microsoft.SharePoint.Client.File对象获取文件大小的好方法。

Client对象没有Length成员

我试过了:

foreach (SP.File file in files)
{
    string path = file.Path;
    path = path.Substring(this.getTeamSiteUrl().Length);
    FileInformation fileInformation = SP.File.OpenBinaryDirect(this.Context, path);
    using (MemoryStream memoryStream = new MemoryStream())
    {
        CopyStream(fileInformation.Stream, memoryStream);
        file.Size = memoryStream.Length;
    }
}

这给了我一个长度通过使用MemoryStream，但它不是很好的性能。该文件也不属于文档库。因为它是一个附加文件，我不能使用ListItemAllFields将其转换为ListItem对象。如果我可以将它转换为ListItem，我可以使用:ListItem["File_x0020_Size"]

来获取它的大小

我如何得到Client对象的文件大小在SharePoint使用c# ?

我如何从Microsoft.SharePoint.Client.File对象获得文件大小?

加载File_x0020_Size字段信息获取

当我想列出Sharepoint 2010文件夹中的所有文件时，我就是这样做的:

//folderPath is something like /yoursite/yourlist/yourfolder
Microsoft.SharePoint.Client.Folder spFolder = _ctx.Web.GetFolderByServerRelativeUrl(folderPath);
_ctx.Load(spFolder);
_ctx.ExecuteQuery();
FileCollection fileCol = spFolder.Files;
_ctx.Load(fileCol);
_ctx.ExecuteQuery();
foreach (Microsoft.SharePoint.Client.File spFile in fileCol)
{
    //In here, specify all the fields you want retrieved, including the file size one...
    _ctx.Load(spFile, file => file.Author, file => file.TimeLastModified, file=>file.TimeCreated, 
                            file => file.Name, file => file.ServerRelativeUrl, file => file.ListItemAllFields["File_x0020_Size"]);
    _ctx.ExecuteQuery();
    int fileSize = int.Parse((string)spFile.ListItemAllFields["File_x0020_Size"]);
}

_ctx显然是您启动的ClientContext。

下面是所有Sharepoint内部字段的扩展列表

你不能直接使用Stream属性的长度吗?

file.Size = fileInformation.Stream.Length;

我不知道这个问题是否曾经被解决过，但是对于那些正在寻找答案的人(就像我一样):

…获取SP.FILE的代码…

SP.FileInformation fileInfo = SP.File.OpenBinaryDirect(ctx, mySPFile.ServerRelativeUrl);
byte[] bodyString = ReadToEnd(fileInfo.Stream);
int length = bodyString.Length;
Console.Write(length.ToString());

…做你需要做的其他事情....

    public static byte[] ReadToEnd(System.IO.Stream stream)
    {
        long originalPosition = 0;
        if (stream.CanSeek)
        {
            originalPosition = stream.Position;
            stream.Position = 0;
        }
        try
        {
            byte[] readBuffer = new byte[4096];
            int totalBytesRead = 0;
            int bytesRead;
            while ((bytesRead = stream.Read(readBuffer, totalBytesRead, readBuffer.Length - totalBytesRead)) > 0)
            {
                totalBytesRead += bytesRead;
                if (totalBytesRead == readBuffer.Length)
                {
                    int nextByte = stream.ReadByte();
                    if (nextByte != -1)
                    {
                        byte[] temp = new byte[readBuffer.Length * 2];
                        Buffer.BlockCopy(readBuffer, 0, temp, 0, readBuffer.Length);
                        Buffer.SetByte(temp, totalBytesRead, (byte)nextByte);
                        readBuffer = temp;
                        totalBytesRead++;
                    }
                }
            }
            byte[] buffer = readBuffer;
            if (readBuffer.Length != totalBytesRead)
            {
                buffer = new byte[totalBytesRead];
                Buffer.BlockCopy(readBuffer, 0, buffer, 0, totalBytesRead);
            }
            return buffer;
        }
        finally
        {
            if (stream.CanSeek)
            {
                stream.Position = originalPosition;
            }
        }
    }

希望这将帮助其他人，因为我找不到一个直接的答案在互联网上!

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