如何使用CSOM将列表sharepoint列表附件复制到文档库

ClientContext context = new ClientContext("https://your-sharepoint-site-url");

List list = context.Web.Lists.GetByTitle("Your List Title");

CamlQuery query = new CamlQuery();
ListItemCollection items = list.GetItems(query);
context.Load(items, 
    includes => includes.Include(
        item => item.AttachmentFiles,
        item => item["Title"] // 如果需要获取其他字段，可以在这里添加
    )
);
context.ExecuteQuery();

foreach (ListItem item in items)
{
    if (item.AttachmentFiles.Count > 0)
    {
        foreach (Attachment attachment in item.AttachmentFiles)
        {
            FileCreationInformation fileInfo = new FileCreationInformation();
            fileInfo.ContentStream = attachment.OpenBinaryStream();
            fileInfo.Url = attachment.FileName;
            fileInfo.Overwrite = true;

            List documentLibrary = context.Web.Lists.GetByTitle("Your Document Library Title");
            Microsoft.SharePoint.Client.File newFile = documentLibrary.RootFolder.Files.Add(fileInfo);
            context.Load(newFile);
            context.ExecuteQuery();
        }
    }
}