Uploading File To SharePoint Document Library

Uploading a file to SharePoint 2007 (WSS 3.0 or MOSS 2007) Document Library is very simple. Also Content Types and template files can be associated with a Document library. so we can create a new item using template file. Following code demos how to upload a file to SharePoint Document library from local file system and from the template file stored in SharePoint:

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using Microsoft.SharePoint;

class Program
{
    static void Main(string[] args)
    {
        UploadFileToDocumentLibrary("http://localhost", "Shared Documents", @"c:\Test.doc");
        InsertByTemplateFile("http://localhost", "Shared Documents", "Document");

        Console.WriteLine("Done!");
        Console.Read();
    }

    static void UploadFileToDocumentLibrary(string siteName, string listName, string fileName)
    {
        FileStream stream = File.OpenRead(fileName);
        byte[] content = new byte[stream.Length];

        stream.Read(content, 0, (int)stream.Length);
        stream.Close();

        using (SPSite site = new SPSite(siteName))
        {
            using (SPWeb web = site.OpenWeb())
            {
                SPDocumentLibrary lib = web.Lists[listName] as SPDocumentLibrary;

                //string docUrl = lib.RootFolder.Url + "/testupload.docx";
                //SPFile newDoc = lib.RootFolder.Files.Add(docUrl, content, true);
                SPFile newDoc = lib.RootFolder.Files.Add("testUpload.doc", content, true);

                SPListItem item = newDoc.Item;
                item["Title"] = "Test uploading file";
                item.Update();

            }
        }
    }

    static void InsertByTemplateFile(string siteName, string listName, string contentTypeName)
    {
        using (SPSite site = new SPSite(siteName))
        {
            using (SPWeb web = site.OpenWeb())
            {
                SPDocumentLibrary lib = web.Lists[listName] as SPDocumentLibrary;
                SPContentType cType = lib.ContentTypes[contentTypeName];

                SPFile cTypeTemplateFile = web.GetFile(cType.DocumentTemplateUrl);
                byte[] content = cTypeTemplateFile.OpenBinary();

                SPFile newDoc = lib.RootFolder.Files.Add("testTemplate.doc", content, true);

                SPListItem item = newDoc.Item;
                item["Title"] = "Test inserting by template file";
                item["ContentTypeId"] = cType.Id;
                item.Update();
            }
        }
    }
}