I try to export chart images to png or pdf with the code below.(I use Asp.Net MVC, Telerik Kendo, Inskcape)
Every user needs to have installed Inkscape software on their computers to get charts exported. I mean, if user doesn't have Inkscape, user can not get image.
So i want to control if user have Inkscape or not. If there is no installed Inkscape, i want to show exception message to related View like "Please install Inkscape to your computers"
How can i do it? With try, catch? If else? I can't get the logic about what i should.
private string DoExport(string svgFile, KendoChartExport.Models.ExportFormat format)
{
var extension = format == KendoChartExport.Models.ExportFormat.PNG ? "png" : "pdf";
var outFile = TempFileName() + "." + extension;
var inkscape = new System.Diagnostics.Process();
inkscape.StartInfo.FileName = INKSCAPE_PATH;
inkscape.StartInfo.Arguments =
String.Format("--file \"{0}\" --export-{1} \"{2}\" --export-width {3} --export-height {4}",
svgFile, extension, outFile, WIDTH, HEIGHT);
inkscape.StartInfo.UseShellExecute = true;
inkscape.Start();
inkscape.WaitForExit();
return outFile;
}
I want to someting like that:
try
{
inkscape.Start();
}
catch (Exception)
{
throw ViewBag.Error = "Please Install Inkscape";
}
Any idea to help?
Related
I am creating an azure function application to validate xml files using a zip folder of schematron files.
I have run into a compatibility issue with how the URI's for the files are being created between mac and windows.
The files are downloaded from a zip on azure blob storage and then extracted to the functions local storage.
When the a colleague runs the transform method of the saxon cs api on a windows machine the method is able to run the first transformation and produce the stage 1.out file, however on the second transformation the transform method throws an exception stating that it cannot find the file even though it is present on the temp directory.
On mac the URI is /var/folders/6_/3x594vpn6z1fjclc0vx4v89m0000gn/T and on windows it is trying to find it at file:///C:/Users/44741/AppData/Local/Temp/ but the library is unable to find the file on the windows machine even if it is moved out of temp storage.
Unable to retrieve URI file:///C:/Users/44741/Desktop/files/stage1.out
The file is present at this location but for some reason the library cannot pick it up on the windows machine but it works fine on my mac. I am using Path.Combine to build the URI.
Has anyone else ran into this issue before?
The code being used for the transformations is below.
{
try
{
var transform = new Transform();
transform.doTransform(GetTransformArguments(arguments[Constants.InStage1File],
arguments[Constants.SourceDir] + "/" + schematronFile, arguments[Constants.Stage1Out]));
transform.doTransform(GetTransformArguments(arguments[Constants.InStage2File], arguments[Constants.Stage1Out],
arguments[Constants.Stage2Out]));
transform.doTransform(GetFinalTransformArguments(arguments[Constants.InStage3File], arguments[Constants.Stage2Out],
arguments[Constants.Stage3Out]));
Log.Information("Stage 3 out file written to : " + arguments[Constants.Stage3Out]);;
return true;
}
catch (FileNotFoundException ex)
{
Log.Warning("Cannot find files" + ex);
return false;
}
}
private static string[] GetTransformArguments(string xslFile, string inputFile, string outputFile)
{
return new[]
{
"-xsl:" + xslFile,
"-s:" + inputFile,
"-o:" + outputFile
};
}
private static string[] GetFinalTransformArguments(string xslFile, string inputFile, string outputFile)
{
return new[]
{
"-xsl:" + xslFile,
"-s:" + inputFile,
"-o:" + outputFile,
"allow-foreign=true",
"generate-fired-rule=true"
};
}```
So assuming the intermediary results are not needed as files but you just want the result (I assume that is the Schematron schema compiled to XSLT) you could try to run XSLT 3.0 using the API of SaxonCS (using Saxon.Api) by compiling and chaining your three stylesheets with e.g.
using Saxon.Api;
string isoSchematronDir = #"C:\SomePath\SomeDir\iso-schematron-xslt2";
string[] isoSchematronXslts = { "iso_dsdl_include.xsl", "iso_abstract_expand.xsl", "iso_svrl_for_xslt2.xsl" };
Processor processor = new(true);
var xsltCompiler = processor.NewXsltCompiler();
var baseUri = new Uri(Path.Combine(isoSchematronDir, isoSchematronXslts[2]));
xsltCompiler.BaseUri = baseUri;
var isoSchematronStages = isoSchematronXslts.Select(xslt => xsltCompiler.Compile(new Uri(baseUri, xslt)).Load30()).ToList();
isoSchematronStages[2].SetStylesheetParameters(new Dictionary<QName, XdmValue>() { { new QName("allow-foreign"), new XdmAtomicValue(true) } });
using (var schematronIs = File.OpenRead("price.sch"))
{
using (var compiledOs = File.OpenWrite("price.sch.xsl"))
{
isoSchematronStages[0].ApplyTemplates(
schematronIs,
isoSchematronStages[1].AsDocumentDestination(
isoSchematronStages[2].AsDocumentDestination(processor.NewSerializer(compiledOs)
)
);
}
}
If you only need the compiled Schematron to apply it further to validate an XML instance document against that Schematron you could even store the Schematron as an XdmDestination whose XdmNode you feed to XsltCompiler e.g.
using Saxon.Api;
string isoSchematronDir = #"C:\SomePath\SomeDir\iso-schematron-xslt2";
string[] isoSchematronXslts = { "iso_dsdl_include.xsl", "iso_abstract_expand.xsl", "iso_svrl_for_xslt2.xsl" };
Processor processor = new(true);
var xsltCompiler = processor.NewXsltCompiler();
var baseUri = new Uri(Path.Combine(isoSchematronDir, isoSchematronXslts[2]));
xsltCompiler.BaseUri = baseUri;
var isoSchematronStages = isoSchematronXslts.Select(xslt => xsltCompiler.Compile(new Uri(baseUri, xslt)).Load30()).ToList();
isoSchematronStages[2].SetStylesheetParameters(new Dictionary<QName, XdmValue>() { { new QName("allow-foreign"), new XdmAtomicValue(true) } });
var compiledSchematronXslt = new XdmDestination();
using (var schematronIs = File.OpenRead("price.sch"))
{
isoSchematronStages[0].ApplyTemplates(
schematronIs,
isoSchematronStages[1].AsDocumentDestination(
isoSchematronStages[2].AsDocumentDestination(compiledSchematronXslt)
)
);
}
var schematronValidator = xsltCompiler.Compile(compiledSchematronXslt.XdmNode).Load30();
using (var sampleIs = File.OpenRead("books.xml"))
{
schematronValidator.ApplyTemplates(sampleIs, processor.NewSerializer(Console.Out));
}
The last example writes the XSLT/Schematron validation SVRL output to the console but could of course also write it to a file.
Is it possible that a XNA program able to import the resource (etc: image, sound) into the content of the program via code? For example, the user want to add an new image into the program, the XNA program will behave like the Window's Add File or Copy File. If possible WinForm shall avoid.
OpenFileDialog f = new OpenFileDialog();
f.Filter = "PNG files (*.png)|*.png|All files (*.*)|*.*";
f.Title = "Import Image";
DialogResult result = f.ShowDialog(); // Show the dialog.
string file = "";
if (result == DialogResult.OK) // Test result.
{
file = f.FileName;
}
else //If cancels, handle here
Application.Exit();
using (FileStream SourceStream = File.Open(file, FileMode.Open))
{
//Load the Texture here
YourTexture = Texture2D.FromStream(GraphicsDevice, SourceStream);
}
That uses a simple WinForms OpenDialog Window, but if you don't want winforms, you can make your own and use this part just to load.
using (FileStream SourceStream = File.Open(file, FileMode.Open))
{
//Load the Texture here
YourTexture = Texture2D.FromStream(GraphicsDevice, SourceStream);
}
You can save the Texture2D Back by doing
using(Stream stream = File.Create(file));
{
texture.SaveAsPng(stream, texture.Width, texture.Height);
}
I am developing a blackberry application where i want to select an image present in device and display it in my application. How to do it.
UPDATE
hi I used FilePicker to get the path of the file and i am storing it in "Selection(String)"
and i am using below code to display image in my application but i am getting exception. can anybody tell me where i did mistake.
try {
FileConnection fconn = (FileConnection)Connector.open(selection,Connector.READ);
// If no exception is thrown, then the URI is valid, but the file may or may not exist.
if (fconn.exists()) {
InputStream input = fconn.openInputStream();
int available = input.available();
byte[] data = new byte[available];
input.read(data, 0, available);
EncodedImage image = EncodedImage.createEncodedImage(data,0,data.length);
Bitmap b = image.getBitmap();
BitmapField picture = new BitmapField(b);
add(picture);
add(new LabelField("Data Length:" + data.length));
}
else {
add(new LabelField("Picture does not exist"));
}
fconn.close();
}
catch (Exception ioe) {
add(new LabelField("Error"));
}
If your target OS is 6.0+ you can use RIM component FilePicker.
For lower OS versions you can use also this component: File Selection Popup
i am using the following code to show the image that has been saved in my database from my asp.net mvc(C#) application:.
public ActionResult GetSiteHeaderLogo()
{
SiteHeader _siteHeader = new SiteHeader();
Image imgImage = null;
long userId = Utility.GetUserIdFromSession();
if (userId > 0)
{
_siteHeader = this.siteBLL.GetSiteHeaderLogo(userId);
if (_siteHeader.Logo != null && _siteHeader.Logo.Length > 0)
{
byte[] _imageBytes = _siteHeader.Logo;
if (_imageBytes != null)
{
using (System.IO.MemoryStream imageStream = new System.IO.MemoryStream(_imageBytes))
{
imgImage = Image.FromStream(imageStream);
}
}
string sFileExtension = _siteHeader.FileName.Substring(_siteHeader.FileName.IndexOf('.') + 1,
_siteHeader.FileName.Length - (_siteHeader.FileName.IndexOf('.') + 1));
Response.ContentType = Utility.GetContentTypeByExtension(sFileExtension.ToLower());
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.BufferOutput = false;
if (imgImage != null)
{
ImageFormat _imageFormat = Utility.GetImageFormat(sFileExtension.ToLower());
imgImage.Save(Response.OutputStream, _imageFormat);
imgImage.Dispose();
}
}
}
return new EmptyResult();
}
It works fine when i upload original image. But when i upload any downloaded images, it throws the following error:
System.Runtime.InteropServices.ExternalException: A generic error occurred in GDI+.
System.Runtime.InteropServices.ExternalException: A generic error occurred in GDI+.
at System.Drawing.Image.Save(Stream stream, ImageCodecInfo encoder, EncoderParameters encoderParams)
at System.Drawing.Image.Save(Stream stream, ImageFormat format)
For. Ex: When i upload the original image, it shows as logo in my site and i downloaded that logo from the site and when i re-upload the same downloaded image, it throws the above error. It seems very weird to me and not able to find why its happening. Any ideas on this?
I'd guess that your problem lies here:
using (System.IO.MemoryStream imageStream = new System.IO.MemoryStream(_imageBytes))
{
imgImage = Image.FromStream(imageStream);
}
Because after using .FromStream, the Image owns the stream and might be very upset if you close it. To verify if that's the problem you can just try:
using (System.IO.MemoryStream imageStream = new System.IO.MemoryStream(_imageBytes))
{
imgImage = new Bitmap( Image.FromStream(imageStream) );
}
I've found that error usually comes from a file access problem. Sounds obvious, I realize, but double-check that the file path is correct and that the file exists, and also that the IIS process has permissions to that file.
Trying to use JSR 75 to access media saved under the '/home/video/' directory on the device. Using Blackbery JDK 4.6.1. Single line of code throws a 'FileSystem IO Error' Exception. Which is, as usual, unhelpful in the extreme.
fconn = (FileConnection)Connector.open("file:///home/user/videos/"+name, Connector.READ);
Has anyone tried to do this? I can open files within my jar, but can't seem to access the media folder. I have the javax.microedition.io.Connector.file.read permission set and my appplication is signed.
There are two kind of filesystems on BlackBerry - SDCard and store. You have to use one of them, defining it in the path. Standard directory on SDCard where video, music etc stored is "file:///SDCard/BlackBerry".
String standardPath = "file:///SDCard/BlackBerry";
String videoDir = System.getProperty("fileconn.dir.videos.name");
String fileName = "video.txt";
String path = standardPath+"/"+videoDir+"/"+fileName;
String content = "";
FileConnection fconn = null;
DataInputStream is = null;
ByteVector bytes = new ByteVector();
try {
fconn = (FileConnection) Connector.open(path, Connector.READ);
is = fconn.openDataInputStream();
int c = is.read();
while(-1 != c)
{
bytes.addElement((byte) (c));
c = is.read();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
content = new String(bytes.toArray());
add(new RichTextField(content));
See also
SUN Dev Network - Getting Started with the FileConnection APIs
RIM Forum - Some questions about FileConnection/JSR 75
Use System.getProperty("fileconn.dir.memorycard") to check if SDCard available
How to save & delete a Bitmap image in Blackberry Storm?