CSOM - Upload a file to a subdirectory in Sharepoint Online

Question

var uploadFile = list
.RootFolder
.Folders
.GetByPath(ResourcePath.FromDecodedUrl("A/B/C"))
.Files
.Add(newFile);

ctx.Load(uploadFile);
await ctx.ExecuteQueryAsync();

Throws System.IO.DirectoryNotFoundException even though both directories exist. So how can I upload a file to the subdirectory "C" under A/B ?

Answer 1

Hi @developer sp1 ,

Try to upload file into sub folder like this:

public static void UploadFile(ClientContext context,string uploadFolderUrl, string uploadFilePath)  
{  
    var fileCreationInfo = new FileCreationInformation  
    {  
            Content = System.IO.File.ReadAllBytes(uploadFilePath),  
            Overwrite = true,  
            Url = Path.GetFileName(uploadFilePath)  
    };  
    var targetFolder = context.Web.GetFolderByServerRelativeUrl(uploadFolderUrl);  
    var uploadFile = targetFolder.Files.Add(fileCreationInfo);  
    context.Load(uploadFile);  
    context.ExecuteQuery();  
}  
  
using (var ctx = new ClientContext(webUri))  
{  
     ctx.Credentials = credentials;  
  
     UploadFile(ctx,"LibName/FolderName/Sub Folder Name/Sub Sub Folder Name/Sub Sub Sub Folder Name",filePath);     
}  

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