I need to create a file in document library using CSOM, It is not like uploading a file from our local system. It should be created using code and uploaded to sharepoint library.

Is it possible?

  • You want to write code Javascript or c#? Commented Apr 26, 2017 at 7:38
  • I want to do it using C#,
    – KumarV
    Commented Apr 26, 2017 at 7:40

3 Answers 3


You need to use the FileCreationInformation to create a file.

Try the below code:

FileCreationInformation createFile = new FileCreationInformation();
createFile.Url = "test.txt";
//use byte array to set content of the file
string somestring = "hello there";
byte[] toBytes = Encoding.ASCII.GetBytes(somestring);

createFile.Content = toBytes; 

List spList = context.Web.Lists.GetByTitle("Documents");
Microsoft.SharePoint.Client.File addedFile = spList.RootFolder.Files.Add(createFile);

ListItem item = addedFile.ListItemAllFields;
item["Title"] = "File generated using Code";

Console.WriteLine("File generated using code");
  • Thanks, can you pls also tell me how would I update the text in text file. I mean it should have previous text and also next time updating it should append some text to the file
    – KumarV
    Commented Apr 26, 2017 at 8:54

You can create a file in memory and save that to your document library.

var clientContext = new ClientContext("https://my.sharepoint.com/");

using (var stream = new MemoryStream())
    using (var writer = new StreamWriter(stream))
        writer.WriteLine("Dummy text");

        stream.Position = 0;
        var fileUrl = "/Documents/MyDummyFile.txt";

        Microsoft.SharePoint.Client.File.SaveBinaryDirect(clientContext, fileUrl, stream, true);

Key here is the SaveBinaryDirect method. More info on https://msdn.microsoft.com/en-us/library/ee538285


Try This

public static void UploadLogFileIntoDocumentLibrary(ClientContext ctx, Web oweb, string FilePath,string FileName)
                #region Create File in Site Asset > Visitor Logs folder
                //Get Server Relative URL of SiteAssets and Hit to Visitor Logs folder
                Folder oFolder = oweb.GetFolderByServerRelativeUrl("/SiteAssets/Visitor Logs");
                //Create a file
                FileCreationInformation oCreateFile = new FileCreationInformation();
                oCreateFile.Content = System.IO.File.ReadAllBytes(FilePath);
                oCreateFile.Url = FileName;
                oCreateFile.Overwrite = true;
                //Add a created file to Given path
                Microsoft.SharePoint.Client.File fileToUpload = oFolder.Files.Add(oCreateFile);
                //Delete the Temp created file
            catch (Exception ex) 
                Console.WriteLine("Error: " + ex.Message);

Here i am uploading text file inside the Folder so if its not required u can remove the Visitor Logs folder name

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