Upload/Download file from Sharepoint using AD Authentication

Question

Hi I want to upload and download file from sharepoint using .net web api.

Jayraj Chhaya · Answer

To upload and download files from SharePoint using AD authentication in a .NET Web API you can utilize the SharePoint Client Object Model (CSOM). Below is a concise example demonstrating both operations. Uploading a File using Microsoft.SharePoint.Client; public void UploadFile(string siteUrl string filePath string targetFolder) { var securePassword = new SecureString(); foreach (char c in your_password) securePassword.AppendChar(c); using (var context = new ClientContext(siteUrl)) { context.Credentials = new NetworkCredential(your_username securePassword your_domain); var targetList = context.Web.Lists.GetByTitle(Documents); var fileCreationInfo = new FileCreationInformation { Content = System.IO.File.ReadAllBytes(filePath) Url = Path.GetFileName(filePath) Overwrite = true }; var uploadFile = targetList.RootFolder.Files.Add(fileCreationInfo); context.ExecuteQuery(); } } Downloading a File public void DownloadFile(string siteUrl string fileUrl string downloadPath) { var securePassword = new SecureString(); foreach (char c in your_password) securePassword.AppendChar(c); using (var context = new ClientContext(siteUrl)) { context.Credentials = new NetworkCredential(your_username securePassword your_domain); var fileInfo = File.OpenBinaryDirect(context fileUrl); using (var fileStream = new FileStream(downloadPath FileMode.Create)) { fileInfo.Stream.CopyTo(fileStream); } } } Ensure you replace placeholders like your_username  your_password  and your_domain with actual values. This approach allows seamless interaction with SharePoint while leveraging AD authentication for secure access.