Upload file to document library and update the meta data using client context

public ListItem UploadDocument(String fileName, String filePath, Dictionary<string, object> metaDataList)
{
SP.ClientContext ctx = new SP.ClientContext(“http://yoursharepointURL”);

Web web = ctx.Web;

FileCreationInformation newFile = new FileCreationInformation();

newFile.Content = System.IO.File.ReadAllBytes(@"C:\TestFile.doc");

newFile.Url = "/" + fileName;

List docs = web.Lists.GetByTitle(“Shared Documents”);

Microsoft.SharePoint.Client.File uploadFile = docs.RootFolder.Files.Add(newFile);

// Set the file to be uploaded and define the fields to be returned
context.Load(uploadFile,
i => i.ListItemAllFields.Id
i => i.ListItemAllFields.DisplayName,
i => i.ListItemAllFields["Title"],
i => i.ListItemAllFields["FileRef"],
i => i.ListItemAllFields["Created_x0020_By"],
i => i.ListItemAllFields["File_x0020_Size"]);

SPClient.ListItem item = uploadFile.ListItemAllFields;

//Set the metadata
foreach (var meta in metaDataList)
{
item[meta.Key] = meta.Value;
}

item.Update();

context.ExecuteQuery();

return item;
}

Upload a File to a SharePoint Document Library

using System;

using System.Collections;

using System.Collections.Generic;

using System.Text;

using System.Net;

using System.IO;

using System.Xml;

namespace DevHoleDemo

{

    class Program

    {

        static void Main(string[] args)

        {

            DocLibHelper docLibHelper = new DocLibHelper();

            Dictionary<string, object> properties = new Dictionary<string, object>();

            properties.Add("Title", "Test Title");

            //Create or overwrite text file test.txt in 'Docs' document library creating folder 'Test Folder' as required.

            docLibHelper.Upload("http://localhost/Docs/Test Folder/test.txt", System.Text.Encoding.ASCII.GetBytes("Test text."), properties);

        }

    }

    public class DocLibHelper

    {

        ListsService.Lists m_listService;

        ICredentials m_credentials;

        ListInfoCollection m_lists;

        public DocLibHelper()

        {

            m_credentials = CredentialCache.DefaultCredentials;

            m_listService = new ListsService.Lists();

            m_listService.Credentials = m_credentials;

            m_lists = new ListInfoCollection(m_listService);

        }

Upload a File to a SharePoint Site from a Local Folder

Aspx Page

<form id="Form1" method="post" runat="server">
   <SharePoint:FormDigest runat="server" />
   <input id="File1" type="file" runat="server" title="upldFileBox">
   <asp:Button id="Button1" runat="server" 
      Text="Upload File"></asp:Button>
   <asp:TextBox id="TextBox1" runat="server"></asp:TextBox>
</form>

Code Behind

SharePoint Upload File in Library

public void UploadFileInLibrary(string siteUrl, string webName, string libraryName, string subfolderPath, string fileName)
{
    using (ClientContext clientContext = new ClientContext(siteUrl))
    {

        string uploadLocation = Path.GetFileName(fileName);
        if (!string.IsNullOrEmpty(subfolderPath))
        {
            uploadLocation = string.Format("{0}/{1}", subfolderPath, uploadLocation);
        }
        uploadLocation = string.Format("/{0}/{1}/{2}", webName, libraryName, uploadLocation);
        var list = clientContext.Web.Lists.GetByTitle(libraryName);
        var fileCreationInformation = new FileCreationInformation();
        fileCreationInformation.Content = System.IO.File.ReadAllBytes(fileName);
        fileCreationInformation.Overwrite = true;
        fileCreationInformation.Url = uploadLocation;
        list.RootFolder.Files.Add(fileCreationInformation);
        clientContext.ExecuteQuery();
    }
}