I have started using Xsd2Code and to date have been deserializing XML straight from an actual file.
What I need to do now is deserialize the xml from a local variable.
Here's a code snippet.
using (FileStream getResponseDataFromFile = new FileStream (#:\Temp\Output\DeclarationResponse.xml", FileMode.Open))
{
XmlSerializer serializeGbResponseXML = new XmlSerializer(typeof(declarationGbResponse));
declarationGbResponse myResponse = (declarationGbResponse)serializeGbResponseXML.Deserialize(getResponseDataFromFile);
foreach (var acceptanceResponseItem in myResponse.acceptanceResponse)
{
........
}
What I need to do is replace loading the XML from a FileSteam c:\temp... and instead parse it from a local variable then deserialize it from that variable. I can then use the class created by Xsd2Code and display and use the various properties.
This will work for you as long as "payloadXML" is a well formed xml string.
public myType DeserializeEstimatePayload(string payloadXML)
{
myType est = null;
XmlSerializer xmlSerializer = new XmlSerializer(typeof(myType ));
MemoryStream memStream = new MemoryStream(Encoding.Unicode.GetBytes(payloadXML));
est = (myType )xmlSerializer.Deserialize(memStream);
xmlSerializer = null; memStream = null;
return est;
}
Related
I want to create a HttpResponse that streams a local file.
I want to use a MemoryStream, so that I can delete the file afterwards (well actually before returning the repsonse).
I always end up with an empty response although the stream seems to be valid.
Working with a FileStream in API Controller works, though.
public HttpResponseMessage GetExcelFile(Guid id)
{
// this model is needed to internally create an .xls file that represents this model
var exportModel = this.myService.GetExport(id);
// this approach does not work -> respone always empty although memory stream has content
// var stream = new MemoryStream();
// internally creates a .xls file (using lib) and returns its content as memory stream
// this.myService.ConvertToStream(exportModel, stream));
// this works fine
var stream = File.OpenRead(#"D:\test0815.xls");
var result = this.Request.CreateResponse(HttpStatusCode.OK);
result.Content = new StreamContent(stream);
result.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
result.Content.Headers.ContentLength = stream.Length;
result.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
{
FileName = $"{exportModel.Name}-Sheet.xls"
};
return result;
}
this is my method that actually converts to memorystream:
private MemoryStream SaveToStream(MemoryStream stream)
{
using (FileStream source = File.Open(
#"D:\test0815.xls",
FileMode.Open))
{
Console.WriteLine("Source length: {0}", source.Length.ToString());
// Copy source to destination.
source.CopyTo(stream);
}
return stream;
}
I also tried writing to memory stream but this did not work either.
It seems that result.Content = new StreamContent(stream); is just not working with an memory stream.
Any ideas?
finally I found a working solution:
var memoryStream = new MemoryStream((int)fileStream.Length);
fileStream.CopyTo(memoryStream);
fileStream.Close();
memoryStream.Seek(0, SeekOrigin.Begin);
HttpContent content = new StreamContent(memoryStream);
var result = this.Request.CreateResponse(HttpStatusCode.OK);
result.Content =content;
result.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
I'm trying to export a list, but when i open the file download it just shows a bunch of characteres that don't make sense (kinda looks like machine language). I've looked at some codes here and all of them are similar to mine, what am I missing?
Here's my code:
The method I call:
[HttpGet]
public HttpResponseMessage Get()
{
HttpResponseMessage response;
response = Request.CreateResponse(HttpStatusCode.OK);
MediaTypeHeaderValue mediaType = new MediaTypeHeaderValue("application/ms-excel");
response.Content = new StreamContent(GetExcelSheet());
response.Content = response.Content;
response.Content.Headers.ContentType = mediaType;
response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment");
response.Content.Headers.ContentDisposition.FileName = "PivotGrid_Orders.xls";
return response;
}
The method that format cells:
public MemoryStream GetExcelSheet()
{
using (var package = new ExcelPackage())
{
var worksheet = package.Workbook.Worksheets.Add("Orders");
//worksheet.Cells["A1"].LoadFromCollection()
worksheet.Cells["A1"].LoadFromCollection(Orders(), false);
package.Save();
var stream = new MemoryStream(package.GetAsByteArray()); //capacidade
return stream;
}
}
The list i've created to test:
public List<ExListModel> Orders()
{
List<ExListModel> lst = new List<ExListModel>();
orders.Add(new ExListModel{ Nome = "Developer"});
return lst;
}
As I didn't know EPPlus, I googled it, and its Github page states it produces Open XML excel files (.xlsx). You produce the file with an extension and mimetype of the old binary excel filetype. Change the contenttype to application/vnd.openxmlformats-officedocument.spreadsheetml.sheet and the filename extension to xlsx.
I have the code rendering PDF on the ASP.NET MVC server, but some characters for example e with accent (ě) are not shown correctly. The library I use is itextsharp-LGPL from nuget.
The PDF rendering code is:
protected ActionResult ViewPdf(object model)
{
// http://www.codeproject.com/Articles/66948/Rendering-PDF-views-in-ASP-MVC-using-iTextSharp
// Create the iTextSharp document.
Document doc = new Document();
// Set the document to write to memory.
MemoryStream memStream = new MemoryStream();
PdfWriter writer = PdfWriter.GetInstance(doc, memStream);
writer.CloseStream = false;
doc.Open();
// Render the view xml to a string, then parse that string into an XML dom.
string xmltext = this.RenderActionResultToString(this.View(model));
XmlDocument xmldoc = new XmlDocument();
xmldoc.InnerXml = xmltext.Trim();
// Parse the XML into the iTextSharp document.
ITextHandler textHandler = new ITextHandler(doc);
textHandler.Parse(xmldoc);
// Close and get the resulted binary data.
doc.Close();
byte[] buf = new byte[memStream.Position];
memStream.Position = 0;
memStream.Read(buf, 0, buf.Length);
// Send the binary data to the browser.
return new BinaryContentResult(buf, "application/pdf");
}
The Helper method of controller look like this:
public class PDFControllerBase : Controller
{
protected string RenderActionResultToString(ActionResult result)
{
// Create memory writer.
var sb = new StringBuilder();
var memWriter = new StringWriter(sb);
// Create fake http context to render the view.
var fakeResponse = new HttpResponse(memWriter);
var fakeContext = new HttpContext(System.Web.HttpContext.Current.Request, fakeResponse);
var fakeControllerContext = new ControllerContext(
new HttpContextWrapper(fakeContext),
this.ControllerContext.RouteData,
this.ControllerContext.Controller);
var oldContext = System.Web.HttpContext.Current;
System.Web.HttpContext.Current = fakeContext;
// Render the view.
result.ExecuteResult(fakeControllerContext);
// Restore data.
System.Web.HttpContext.Current = oldContext;
// Flush memory and return output.
memWriter.Flush();
string content = sb.ToString();
return content;
}
}
The view looks like:
#model MyNamespace.Model.MyModel
#{
Layout = null;
}
<?xml version="1.0" encoding="UTF-8" ?>
<itext creationdate="2/4/2015 5:49:07 pm" producer="iTextSharpXML">
<paragraph leading="18.0" font="arial" size="16.0" align="center">
<chunk>#Model.Title</chunk><newline /><newline />
</paragraph>
<paragraph leading="18.0" font="arial" size="10.0" align="justify">
<chunk>#Model.TextDetail</chunk><newline />
</paragraph>
</itext>
I tried to add following code to PDF rendering, but it does not help:
string arial = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Fonts), "arial.ttf");
FontFactory.Register(arial, "arial");
I have the following code:
public byte[] ExportToPdf(DataTable dt)
{
iTextSharp.text.Document document = new iTextSharp.text.Document();
document.Open();
iTextSharp.text.Font font5 = iTextSharp.text.FontFactory.GetFont(FontFactory.HELVETICA, 5);
PdfPTable table = new PdfPTable(dt.Columns.Count);
PdfPRow row = null;
float[] widths = new float[] { 4f, 4f, 4f, 4f, 4f, 4f, 4f, 4f };
table.SetWidths(widths);
table.WidthPercentage = 100;
foreach (DataColumn c in dt.Columns)
{
table.AddCell(new Phrase(c.ColumnName, font5));
}
document.Add(table);
document.Close();
byte[] bytes;
MemoryStream msPDFData = new MemoryStream();
PdfWriter writer = PdfWriter.GetInstance(document, msPDFData);
return msPDFData.ToArray();
}
And in another function i call the function like this:
byte[] bytes = ExportToPdf(table);
return File(bytes, "application/pdf", "RaportDocumenteEmise.pdf");
When i try to open the pdf it says that is damaged.
Somehow the byte array is empty.
Can say me what am i doing wrong?
This is wrong:
iTextSharp.text.Document document = new iTextSharp.text.Document();
document.Open();
A PDF is created using 5 simple steps:
Create a Document object
Create a PdfWriter instance
Open the document
Add content
Close the document
You don't have step 2. In your comment, you say that you've solved the problem by creating that instance after opening the document, but that's wrong! You need to create the PdfWriter instance before opening the document.
Opening the document writes the PDF header to the OutputStream. That can't happen without a valid PdfWriter instance.
I was trying to do the same thing as you.
After many tries, I discovered that if I put PdfWriter.GetInstance
inside using (var ms = new MemoryStream()) { } everything works alright!
My full code is:
public FileContentResult GetPDF() {
string htmlContent = "<p>First line</p><p>Second line</p>";
StringReader sr = new StringReader(htmlContent);
Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 100f, 0f);
HTMLWorker hw= new HTMLWorker(pdfDoc);
FileContentResult result;
using (var ms = new MemoryStream()) {
PdfWriter.GetInstance(pdfDoc, ms);
pdfDoc.Open();
hw.Parse(sr);
pdfDoc.Close();
result = this.File(ms.ToArray(), "application/pdf", "teste.pdf");
}
return result;
}
Ps.: This is a method inside my Controller.
I am currently assembling and displaying a PDF using RazorPDF in MVC4 and would like to save the PDF file to the file system at the same time I return the view.
The following line of code in the controller action is calling the view:
return new PdfResult(claims, "PDF");
I was able to finally write the pdf to the directory system by changing the code base of the RazorPDF render method. The Rendor method creates a PdfWriter object that is associated to the response stream:
// Associate output with response stream
var pdfWriter = PdfWriter.GetInstance(document, viewContext.HttpContext.Response.OutputStream);
pdfWriter.CloseStream = false;
The solution was to create another PdfWriter object that was associated to a FileStream object as illustrated below:
// Create the pdf file in the directory system
var fileStream = new FileStream(myPdfFilePath, FileMode.Create);
var pdfWriter2 = PdfWriter.GetInstance(document, fileStream);
I then closed the objects:
fileStream.Close();
pdfWriter.Close();
pdfWriter2.Close();
I had to essentially incorporate the PdfResult and PdfView classes of RazorPDF into my own project and significantly alter the code. The reason is because I also had to encorporate calls to an email class that sent the pdf to a user.
The full Render method is displayed below:
public void Render(ViewContext viewContext, TextWriter writer)
{
// generate view into string
var sb = new System.Text.StringBuilder();
TextWriter tw = new System.IO.StringWriter(sb);
myResult.View.Render(viewContext, tw);
var resultCache = sb.ToString();
// detect itext (or html) format of response
XmlParser parser;
using (var reader = GetXmlReader(resultCache))
{
while (reader.Read() && reader.NodeType != XmlNodeType.Element)
{
// no-op
}
if (reader.NodeType == XmlNodeType.Element && reader.Name == "itext")
parser = new XmlParser();
else
parser = new HtmlParser();
}
// Create a document processing context
var document = new Document();
document.Open();
// Associate output with response stream
var pdfWriter = PdfWriter.GetInstance(document, viewContext.HttpContext.Response.OutputStream);
pdfWriter.CloseStream = false;
// Create the pdf file in the directory system
var fileStream = new FileStream(myPdfFilePath, FileMode.Create);
var pdfWriter2 = PdfWriter.GetInstance(document, fileStream);
// this is as close as we can get to being "success" before writing output
// so set the content type now
viewContext.HttpContext.Response.ContentType = "application/pdf";
// parse memory through document into output
using (var reader = GetXmlReader(resultCache))
{
parser.Go(document, reader);
}
fileStream.Close();
// Send an email to the claimant
Thread.Sleep(100);
if (File.Exists(myPdfFilePath))
{
var subject = "PDF Documents";
var body = Config.GetContent(ContentParams.CLAIM_DOCUMENT_EMAIL_BODY_TEXT);
bool success;
string errorMessage;
Email.Send(myEmailAddress, subject, body, out success, out errorMessage, myPdfFilePath);
}
pdfWriter.Close();
pdfWriter2.Close();
}
It would be nice if this capability were somehow incorporated into the current RazorPDF project.
why not just get the stream via a web request to the url?
string razorPdfUrl="http://...";
var req = HttpWebRequest.Create(RazorPDFURL);
using (Stream pdfStream = req.GetResponse().GetResponseStream())
{
...
}