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[英]How to convert from Microsoft.Sharepoint.Client.ListItem to Microsoft.Sharepoint.Client.File?
[英]How do I get the filesize from the Microsoft.SharePoint.Client.File object?
我正在尋找一種從Microsoft.SharePoint.Client.File
對象獲取文件大小的好方法。
Client
對象沒有Length
成員。
我嘗試了這個:
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;
}
}
這給了我使用MemoryStream
,但是對性能不好。 該文件也不屬於文檔庫。 由於它是附件,因此無法使用ListItemAllFields
將其轉換為ListItem
對象。 如果可以將其轉換為ListItem
,則可以使用: ListItem["File_x0020_Size"]
獲得其大小。
如何使用C#在SharePoint中獲取Client
對象的文件大小?
加載File_x0020_Size
字段信息以獲取它。
當我要列出Sharepoint 2010文件夾中的所有文件時,這就是我要做的事情:
//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
顯然是您已啟動的ClientContext
。
這是所有Sharepoint內部字段的擴展列表
我不知道這個問題是否曾經解決過,但是對於正在尋找答案的人們(就像我一樣):
...用於獲取SP.FILE的代碼...
SP.FileInformation fileInfo = SP.File.OpenBinaryDirect(ctx, mySPFile.ServerRelativeUrl);
byte[] bodyString = ReadToEnd(fileInfo.Stream);
int length = bodyString.Length;
Console.Write(length.ToString());
...做您需要做的其他事情....
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;
}
}
}
希望這對其他人有幫助,因為我在互聯網上找不到直接的答案!
您不能只使用Stream屬性的長度嗎?
file.Size = fileInformation.Stream.Length;
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