public ActionResult Sample08() { // Check is data posted if (Request.HttpMethod == "POST") { //### Set variables and get POST data System.Collections.Hashtable result = new System.Collections.Hashtable(); String clientId = Request.Form["clientId"]; String privateKey = Request.Form["privateKey"]; String basePath = Request.Form["basePath"]; String fileId = Request.Form["fileId"]; String url = Request.Form["url"]; var file = Request.Files["file"]; String fileGuId = ""; String pageNumber = Request.Form["pageNumber"]; result.Add("clientId", clientId); result.Add("privateKey", privateKey); result.Add("pageNumber", pageNumber); String message = null; // Check is all needed fields are entered if (clientId == null || privateKey == null || fileId == null) { // If not all fields entered send error message message = "Please enter all parameters"; result.Add("error", message); return View("Sample08", null, result); } else { if (basePath == "") { basePath = "https://api.groupdocs.com/v2.0"; } // Create service for Groupdocs account GroupdocsService service = new GroupdocsService(basePath, clientId, privateKey); //Check is chosen local file if (!file.ContentLength.Equals(0)) { // Upload file with empty description. Groupdocs.Api.Contract.UploadRequestResult upload = service.UploadFile(file.FileName, String.Empty, file.InputStream); // Check is upload successful if (upload.Guid != null) { // Put uploaded file GuId to the result's list fileGuId = upload.Guid; } // If upload was failed return error else { message = "UploadFile returns error"; result.Add("error", message); return View("Sample08", null, result); } } //Check is url entered if (!url.Equals("")) { //Make request to upload file from entered Url String guid = service.UploadUrl(url); if (guid != null) { //Get all files from GroupDocs account Groupdocs.Api.Contract.ListEntitiesResult storageInfo = service.GetFileSystemEntities("My Web Documents", 0, -1, null, false, null, null, true); if (storageInfo.Files.Length > 0) { // Get file id by uploaded file GuId for (int i = 0; i < storageInfo.Files.Length; i++) { if (storageInfo.Files[i].Guid == guid) { fileGuId = storageInfo.Files[i].Guid; } } } else { message = "Get files list is failed"; result.Add("error", message); return View("Sample08", null, result); } } //If file wasn't uploaded return error else { result.Add("error", "Something wrong with entered data"); return View("Sample08", null, result); } } //Check is file guid entered if (!fileId.Equals("")) { //Get all files from GroupDocs account Groupdocs.Api.Contract.ListEntitiesResult storageInfo = service.GetFileSystemEntities("", 0, -1, null, false, null, null, true); if (storageInfo.Files.Length > 0) { // Get file id and name by entered file GuId for (int i = 0; i < storageInfo.Files.Length; i++) { if (storageInfo.Files[i].Guid == fileId) { fileGuId = storageInfo.Files[i].Guid; } } } else { message = "Get files list is failed"; result.Add("error", message); return View("Sample08", null, result); } } // Make request to get page image url String[] pageUrl = service.GetDocumentPagesImageUrls(fileGuId, "600x750", String.Empty, Int32.Parse(pageNumber), 1, 100, false); // Check if url is not null if (pageUrl != null) { // Redirect to template with receive URL result.Add("url", pageUrl[0]); return View("Sample08", null, result); } // Else return error to the template else { message = "Something is wrong with your data"; result.Add("error", message); return View("Sample08", null, result); } } } // If data not posted return to template for filling of necessary fields else { return View("Sample08"); } }