CSOM - Upload a file to a subdirectory in Sharepoint Online

developer sp1 461 Reputation points

var uploadFile = list

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 ?

SharePoint Server Development
SharePoint Server Development
SharePoint Server: A family of Microsoft on-premises document management and storage systems.Development: The process of researching, productizing, and refining new or existing technologies.
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  1. Jerryzy 10,556 Reputation points

    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);  
    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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