I Got Error In My Code When I'm Trying To Fetch Image from PDF..any One Knows how i reslove it.And My Code Is As Follow:-
PdfReader pdf = new PdfReader(sourcePdf);
RandomAccessFileOrArray raf = new iTextSharp.text.pdf.RandomAccessFileOrArray(sourcePdf);
try
{
for (int pageNumber = 1; pageNumber <= pdf.NumberOfPages; pageNumber++)
{
PdfDictionary pg = pdf.GetPageN(pageNumber);
// recursively search pages, forms and groups for images.
PdfObject obj = FindImageInPDFDictionary(pg);
if (obj != null)
{
int XrefIndex = Convert.ToInt32(((PRIndirectReference)obj).Number.ToString(System.Globalization.CultureInfo.InvariantCulture));
PdfObject pdfObj = pdf.GetPdfObject(XrefIndex);
PdfStream pdfStrem = (PdfStream)pdfObj;
byte[] bytes = PdfReader.GetStreamBytesRaw((PRStream)pdfStrem);
if ((bytes != null))
{
using (System.IO.MemoryStream memStream = new System.IO.MemoryStream(bytes))
{
memStream.Position = 0;
**System.Drawing.Image img = System.Drawing.Image.FromStream(memStream);**
// must save the file while stream is open.
if (!Directory.Exists(outputPath))
Directory.CreateDirectory(outputPath);
string path = Path.Combine(outputPath, String.Format(#"{0}.jpg", pageNumber));
System.Drawing.Imaging.EncoderParameters parms = new System.Drawing.Imaging.EncoderParameters(1);
parms.Param[0] = new System.Drawing.Imaging.EncoderParameter(System.Drawing.Imaging.Encoder.Compression, 0);
System.Drawing.Imaging.ImageCodecInfo jpegEncoder =GetImageEncoder("JPEG");
img.Save(path, jpegEncoder, parms);
}
}
}
}
}
catch
{
throw;
}
In System.Drawing.Image img = System.Drawing.Image.FromStream(memStream);
Line I Got The Error "Parameter is not valid."
Related
I want to send image files to SQL Server using C#.
The below code is working and saving files and their paths into the database. I need the same data in my API endpoint's response. I've created a custom response class, called RegistrationResponse.
I'm beginner in this so I'm looking for help.
public async Task<RegistrationResponse> PostFormData(HttpRequestMessage request)
{
object data = "";
NameValueCollection col = HttpContext.Current.Request.Form;
// Check if the request contains multipart/form-data.
if (!Request.Content.IsMimeMultipartContent())
{
throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
}
string root = HttpContext.Current.Server.MapPath("~/images");
var provider = new MultipartFormDataStreamProvider(root);
// Read the form data and return an async task.
var task = Request.Content.ReadAsMultipartAsync(provider).
ContinueWith<HttpResponseMessage>(t =>
{
if (t.IsFaulted || t.IsCanceled)
{
Request.CreateErrorResponse(HttpStatusCode.InternalServerError, t.Exception);
}
//read file data
foreach (MultipartFileData dataItem in provider.FileData)
{
try
{
string description = string.Empty;
string userId = string.Empty;
String fileName = string.Empty;
// Show all the key-value pairs.
foreach (var key in provider.FormData.AllKeys)
{
foreach (var val in provider.FormData.GetValues(key))
{
if (key.ToString().ToLower() == "userid")
{
userId = val;
}
else if (key.ToString().ToLower() == "description")
{
description = val;
}
}
}
String name = dataItem.Headers.ContentDisposition.FileName.Replace("\"", "");
fileName = userId + Path.GetExtension(name);
File.Move(dataItem.LocalFileName, Path.Combine(root, fileName));
using (var db = new AlumniDBEntities())
{
//saving path and data in database table
Post userPost = new Post();
userPost.Files = fileName;
userPost.Description = description;
userPost.UserID = Convert.ToInt32(userId);
userPost.CreatedDate = DateTime.Now;
db.Posts.Add(userPost);
db.SaveChanges();
data = db.Posts.Where(x => x.PostID ==
userPost.PostID).FirstOrDefault();
string output = JsonConvert.SerializeObject(data);
}
}
catch (Exception ex)
{
return Request.CreateResponse(ex);
}
}
return Request.CreateResponse(HttpStatusCode.Created);
});
var response = new RegistrationResponse
{
success = true,
status = HttpStatusCode.OK,
message = "Success",
data = data
};
return response;
}
How can i append a pdf into another?
I tried using this code, but I am getting java.lang.NullPointerException when i try to getContentInputStream.
what am I doing wrong? How can I attach one pdf to another?
PDDocument pdfTarget = null;
InputStream is = null;
InputStream tis = null;
for (ChildAssociationRef file: quotationsFiles) {
try {
NodeRef toAppend = file.getChildRef(); //workspace://SpacesStore/11bce382-45bf-4c67-95bc-a65361b323ef
ContentReader append = getReader(toAppend);
is = append.getContentInputStream(); // Here iam getting java.lang.NullPointerException
NodeRef targetNodeRef = reportFile.getNodeRef();
ContentReader targetReader = getReader(targetNodeRef);
tis = targetReader.getContentInputStream();
String fileName = String.valueOf(serviceRegistry.getNodeService().getProperty(targetNodeRef, ContentModel.PROP_NAME));
// stream the document in
pdf = PDDocument.load(is);
pdfTarget = PDDocument.load(tis);
// Append the PDFs
PDFMergerUtility merger = new PDFMergerUtility();
merger.appendDocument(pdfTarget, pdf);
merger.setDestinationFileName(fileName);
merger.mergeDocuments();
} catch (Exception e) {
//throw new AlfrescoRuntimeException("IOException", e);
ColorLogUtil.debug(LOGGER, "IOException Error caused by :" + e);
}
}
private ContentReader getReader(NodeRef nodeRef) {
if (serviceRegistry.getNodeService().exists(nodeRef) == false) {
throw new AlfrescoRuntimeException("NodeRef: " + nodeRef + " does not exist");
}
QName typeQName = serviceRegistry.getNodeService().getType(nodeRef);
if (serviceRegistry.getDictionaryService().isSubClass(typeQName, ContentModel.TYPE_CONTENT) == false) {
throw new AlfrescoRuntimeException("The selected node is not a content node");
}
ContentReader contentReader = serviceRegistry.getContentService().getReader(nodeRef, ContentModel.PROP_CONTENT);
if (contentReader == null) {
throw new AlfrescoRuntimeException("The content reader for NodeRef: " + nodeRef + "is null");
}
return contentReader;
}
See if this code works for you:
public NodeRef mergePdfs(List<NodeRef> nodeRefList, String fileName,NodeRef destinationNode)
throws FileNotFoundException,FileExistsException,Exception {
InputStream originalInputStream = null;
ContentReader reader = null;
NodeRef newDocNoderef = null;
PDFMergerUtility PDFmerger = new PDFMergerUtility();
ByteArrayOutputStream outputstream = new ByteArrayOutputStream();
try {
LOGGER.debug("Merging of Doc Started");
for (NodeRef node : nodeRefList) {
reader = contentService.getReader(node, ContentModel.PROP_CONTENT);
originalInputStream = reader.getContentInputStream();
PDFmerger.addSource(originalInputStream);
}
PDFmerger.setDestinationStream(outputstream);
PDFmerger.mergeDocuments();
if(originalInputStream!=null) {
originalInputStream.close();
}
newDocNoderef = writeContentToAlfresco(outputstream, nodeRefList, fileName,destinationNode);
LOGGER.debug("Documents are merged and new pdf is created at "+newDocNoderef);
} finally {
if(outputstream!=null)
outputstream.close();
}
return newDocNoderef;
}
public NodeRef writeContentToAlfresco(ByteArrayOutputStream outputstream, List<NodeRef> childRefList,
String fileName,NodeRef destinationNode) throws FileExistsException,IOException,Exception {
NodeRef pdf = null;
Map<QName, Serializable> props = new HashMap<>();
Map<Date, NodeRef> dateMap = new HashMap<Date, NodeRef>();
NodeRef parentNodeRef=null;
try {
LOGGER.debug("Upload to Alfresco Started");
for(NodeRef noderef : childRefList) {
Date date = (Date) nodeService.getProperty(noderef, ContentModel.PROP_MODIFIED);
dateMap.put(date, noderef);
}
Map<Date, NodeRef> m1 = new TreeMap<Date, NodeRef>(dateMap);
Map.Entry<Date, NodeRef> entry = m1.entrySet().iterator().next();
NodeRef finalnodeRef = entry.getValue();
if(destinationNode!=null) {
parentNodeRef = destinationNode;
}else {
parentNodeRef = nodeService.getPrimaryParent(finalnodeRef).getParentRef();
}
QName[] myModelProps = CommonConstants.myModelProps;
for (QName myModelProp : myModelProps) {
Serializable object = nodeService.getProperty(finalnodeRef, myModelProp);
props.put(myModelProp, object);
}
FileInfo pdfInfo = fileFolderService.create(parentNodeRef, fileName + ".pdf",
MyModel.TYPE_CUSTOM_MYMODEL_TYPE);
pdf = pdfInfo.getNodeRef();
nodeService.setProperties(pdf,props);
nodeService.setProperty(pdf, ContentModel.PROP_TITLE,
nodeService.getProperty(finalnodeRef, ContentModel.PROP_TITLE));
nodeService.setProperty(pdf, ContentModel.PROP_DESCRIPTION,
nodeService.getProperty(finalnodeRef, ContentModel.PROP_DESCRIPTION));
nodeService.setProperty(pdf,ContentModel.PROP_NAME,fileName + ".pdf");
ContentWriter writer = contentService.getWriter(pdf, ContentModel.PROP_CONTENT, true);
writer.setMimetype(MimetypeMap.MIMETYPE_PDF);
writer.setEncoding("UTF-8");
writer.putContent(new ByteArrayInputStream(outputstream.toByteArray()));
LOGGER.debug("Upload to Alfresco Ended");
} catch(FileExistsException fee) {
ExceptionUtils.printRootCauseStackTrace(fee);
throw new FileExistsException(parentNodeRef, fileName);
}
catch (Exception e) {
ExceptionUtils.printRootCauseStackTrace(e);
throw new Exception(e);
} finally {
if (outputstream != null)
outputstream.close();
}
return pdf;
}
This actually seems like one of the features we support in alfresco-pdf-toolkit out of the box. You could either use that addon, or get some inspiration from the code backing it.
I have did the excel upload in dotnet core .I had to use tempdata to retrieve the details of the excel in list.Instead in my below code i had used Static object to retrieve the list.My code works as like this ,when i click on upload button it will display the details in the excel sheet.and when click on save it will save it to database and i need to edit in grid view using ajax call also .Help me out
My Action in controller is
public async Task<IActionResult> ImportEmployeeDetails(IFormFile excelfile)
{
try
{
EmployeesViewModelList employeesListObject = new EmployeesViewModelList();
List<EmployeeModel> employeesViewModelList = new List<EmployeeModel>();
if (excelfile == null || excelfile.Length == 0)
{
return View(employeesListObject);
}
var supportedTypes = new[] { ".xls", ".xlsx" };
var ext = Path.GetExtension(excelfile.FileName);
if (!supportedTypes.Contains(ext))
{
return View(employeesListObject);
}
var path = Path.Combine(
Directory.GetCurrentDirectory(), "wwwroot",
"EmployeeDetails.xlsx");
if (System.IO.File.Exists(path))
{
System.IO.File.Delete(path);
}
using (var stream = new FileStream(path, FileMode.Create))
{
await excelfile.CopyToAsync(stream);
}
FileInfo file = new FileInfo(path);
using (ExcelPackage package = new ExcelPackage(file))
{
ExcelWorksheet worksheet = package.Workbook.Worksheets[1];
int rowCount = worksheet.Dimension.Rows;
int ColCount = worksheet.Dimension.Columns;
for (int i = 2; i <= rowCount; i++)
{
EmployeeModel emp = new EmployeeModel();
emp.EmployeeId = Convert.ToInt32(worksheet.Cells[i, 1].Value.ToString());
emp.EmpFirstName = worksheet.Cells[i, 2].Value.ToString();
employeesViewModelList.Add(emp);
}
employeesListObject.EmpModelList = employeesViewModelList;
return View(employeesListObject);
}
}
catch(Exception ex)
{
TempData["Message"] = "Opps! Something Went wrong!";
return RedirectToAction("ExcelPackage");
}
}
Try this, using your own list.
List<string> SomeList = new List<string>();
TempData["MyList"] = SomeList;
//then to get data just do
SomeList = TempData["MyList"] as List<string>; //This converts back to List<T>
Once you add the list to the TempData, you can retrive it from any Action or View in the same controller
I need to open a pdf file using a default reader, android works, but for iOS i can not. And I do not have a solid experience with C # only 2 months
public void SaveOpen(string filename, MemoryStream stream)
{
string path = Environment.GetFolderPath(Environment.SpecialFolder.Personal);
string filePath = Path.Combine(path, filename);
//Create a file and write the stream into it.
FileStream fileStream = File.Open(filePath, FileMode.Create);
stream.Position = 0;
stream.CopyTo(fileStream);
fileStream.Flush();
fileStream.Close();
UIViewController currentController = UIApplication.SharedApplication.KeyWindow.RootViewController;
while (currentController.PresentedViewController != null)
currentController = currentController.PresentedViewController;
UIView currentView = currentController.View;
}
To open a pdf file from a filePath:
public void OpenPDF(string filePath)
{
FileInfo fi = new FileInfo(filePath);
QLPreviewController previewController = new QLPreviewController();
previewController.DataSource = new PreviewControllerDataSource(fi.FullName, fi.Name);
UINavigationController controller = FindNavigationController();
if (controller != null)
controller.PresentViewController(previewController, true, null);
}
private UINavigationController FindNavigationController()
{
foreach (var window in UIApplication.SharedApplication.Windows)
{
if (window.RootViewController.NavigationController != null)
{
return window.RootViewController.NavigationController;
}
var value = CheckSubs(window.RootViewController.ChildViewControllers);
if (value != null)
return value;
}
return null;
}
private UINavigationController CheckSubs(UIViewController[] controllers)
{
foreach (var controller in controllers)
{
if (controller.NavigationController != null)
{
return controller.NavigationController;
}
var value = CheckSubs(controller.ChildViewControllers);
return value;
}
return null;
}
So, in your code, after saving it, just call OpenPDF with the correct path.
public ActionResult Index(PublishPost post, HttpPostedFileBase file)
{
var apiURL = "http://test.sa.com/rest/social/update/1161/upload?access_token=6fWV564kj3drlu7rATh8="
WebClient webClient = new WebClient();
byte[] responseBinary = webClient.UploadFile(apiUrl, file.FileName);
string response = Encoding.UTF8.GetString(responseBinary);
/* Giving error here. How to proceed?
}
I want to upload a single file to this url and the response is shown in the figure above. How to proceed further with the same in C#? Please help
Try your code like below.
public ActionResult Index(PublishPost post, HttpPostedFileBase file)
{
var apiURL = "http://test.sa.com/rest/social/update/1161/upload?access_token=6fWV564kj3drlu7rATh8="
using (HttpClient client = new HttpClient())
{
using (var content = new MultipartFormDataContent())
{
byte[] fileBytes = new byte[file.InputStream.Length + 1];
file.InputStream.Read(fileBytes, 0, fileBytes.Length);
var fileContent = new ByteArrayContent(fileBytes);
fileContent.Headers.ContentDisposition = new System.Net.Http.Headers.ContentDispositionHeaderValue("attachment") { FileName = file.FileName };
content.Add(fileContent);
var result = client.PostAsync(apiURL, content).Result;
if (result.StatusCode == System.Net.HttpStatusCode.OK)
{
return new
{
code = result.StatusCode,
message = "Successful",
data = new
{
success = true,
filename = file.FileName
}
};
}
else
{
return new
{
code = result.StatusCode,
message = "Error"
};
}
}
}
}