I downloaded https://github.com/jgraph/mxgraph open source code from Git,this application Save functionality not working in the locally. Is there any possible for run the save functionality in Locally?. is there any configuration required for that? please help me.
After save button click getting below error message
I provide the code snippets for local save && upload of the saved file
code to export the xml of the current graph object
let encoder = new mxCodec();
let result = encoder.encode(graph.getModel());
let xml = mxUtils.getXml(result);
//workaround for the xml export, do not include the <mxGraphModel> tags
xml = xml.substring(xml.indexOf("<mxGraphModel>")+"<mxGraphModel>".length, xml.indexOf("</mxGraphModel>"));
code to upload the xml to re-generate the saved state of the graph
let doc = mxUtils.parseXml(xml);
let codec = new mxCodec(doc);
codec.decode(doc.documentElement, graph.getModel());
let elt = doc.documentElement.firstChild;
let cells = [];
while (elt != null)
{
let cell = codec.decode(elt)
if(cell != undefined){
if(cell.id != undefined && cell.parent != undefined && (cell.id == cell.parent)){
elt = elt.nextSibling;
continue;
}
cells.push(cell);
}
elt = elt.nextSibling;
}
graph.addCells(cells);
You can save locally by using the mxCodec class found in the IO package. Check out the example code here.
I'm not sure how to tie it into that specific button, but find the function that is called when you click save and add/replace it with the three lines needed to encode as xml.
As for how to get that xml code to save as a file, I'm not sure. Perhaps you'll find that code when you modify the save button functionality. The easy way would be to create a div and replace its innerhtml with the xml data, then just copy it and save it yourself.
My requirement is to save a bunch of files (more than 500) in a single zip file locally using FileReference. I am using ASZip to zip the files. Now the problem is if the number of files are more, then I am not even getting Save as dialog box.
I have tried different combinations of data to see whether it is number of files or file size limitation, but it looks like the script automatically stops (irrespective of number of files), if it can't give me the output within a minute.
This is the code that I am using
//*****test code
var myZip:ASZip = new ASZip (CompressionMethod.GZIP);
var myByteArray:ByteArray = new ByteArray();var pdfFile:PDF;
var newPage:Page;
var printPage:BorderContainer;
for (var i:int=0;i<330;i++)
{
printPage = new BorderContainer();
printPage.visible = false;
printPage.x=0;
printPage.y=0;
printPage.includeInLayout = false;
printPage.width = 816+10;
printPage.height = 1056+23;
this.addElement(printPage);
pdfFile = new PDF(Orientation.PORTRAIT, Unit.INCHES, Size.A3 );
pdfFile.setDisplayMode( Display.FULL_PAGE,Layout.SINGLE_PAGE );
newPage = new Page ( Orientation.PORTRAIT,Unit.INCHES,new Size([816+10,1056+10],"MyFavoriteSize",[8.5+10,11+10],[816/0.125,1056/0.218]));
pdfFile.addPage(newPage);
pdfFile.beginFill(new RGBColor(0xFFFFFF));
pdfFile.textStyle(new RGBColor(0x000000));
pdfFile.addImage(printPage,null,-0.5,-0.5,8.5+4,11.5+4);
myByteArray = pdfFile.save(org.alivepdf.saving.Method.LOCAL);
myZip.addFile(myByteArray,i + ".pdf");
}
Can you please let me know what can be done to fix this issue?
Thanks,
Satish.
I have previously successfully managed to upload a file using the webimage helper, but i am now trying to combine that with creating a directory, and failing miserably. here is my code:
if(IsPost){
//Create Directory using PropertyID
var imageroot = Server.MapPath("~/Images/Property/");
var foldername = rPropertyId.ToString();
var path = Path.Combine(imageroot, foldername);
if(!Directory.Exists(path)){
Directory.CreateDirectory(path);
}
photo = WebImage.GetImageFromRequest();
if(photo != null){
MediumFileName = rPropertyId + "_" + gooid + "_" + "Medium";
imagePath = path + MediumFileName;
photo.Save(#"~\" + imagePath);}
}
First, i create a directory with the name of the propertyID. This works fine. I then try and upload new photo's into that path, and i get an error saying that "The given path's format is not supported".
Any ideas?
You correctly use Path.Combine() when creating the directory path, you should do the same when making the image path.
imagePath = Path.Combine(path, MediumFileName);
Other than that, the error message suggests that perhaps it is the omission of a file extension that is causing issues? Perhaps use Path.GetFileName(photo.FileName) or similar and use that as the end of your constructed pathname.
I'm trying to programmatically encrypt configuration sections of App.config and Web.config files. In the following code, I set the path configuration file I want to edit in the configFilePath variable and then expect it to encrypt the connectionStrings section.
var config = ConfigurationManager.OpenExeConfiguration(configFilePath);
var section = config.GetSection("connectionStrings");
if (section.SectionInformation.IsProtected)
{
section.SectionInformation.UnprotectSection();
section.SectionInformation.ForceSave = true;
config.Save(ConfigurationSaveMode.Modified);
ConfigurationManager.RefreshSection("connectionStrings");
}
section.SectionInformation.ProtectSection("DataProtectionConfigurationProvider");
section.SectionInformation.ForceSave = true;
config.Save(ConfigurationSaveMode.Modified);
ConfigurationManager.RefreshSection("connectionStrings");
This runs fine without any errors but makes no changes to the given file. It's like it's not really accessing the file I want to access.
Any ideas?
Right, answering my own question...
The code was indeed not opening the right config file. To do that we need to use ConfigurationManager.OpenMappedExeConfiguration() instead of ConfigurationManager.OpenExeConfiguration().
So, the first line of the code above changes to:
var map = new ExeConfigurationFileMap { ExeConfigFilename = configFilePath };
var config = ConfigurationManager.OpenMappedExeConfiguration(map, ConfigurationUserLevel.None);
I'm attempting to create a PDF file from an HTML file. After looking around a little I've found: wkhtmltopdf to be perfect. I need to call this .exe from the ASP.NET server. I've attempted:
Process p = new Process();
p.StartInfo.UseShellExecute = false;
p.StartInfo.FileName = HttpContext.Current.Server.MapPath("wkhtmltopdf.exe");
p.StartInfo.Arguments = "TestPDF.htm TestPDF.pdf";
p.Start();
p.WaitForExit();
With no success of any files being created on the server. Can anyone give me a pointer in the right direction? I put the wkhtmltopdf.exe file at the top level directory of the site. Is there anywhere else it should be held?
Edit: If anyone has better solutions to dynamically create pdf files from html, please let me know.
Update:
My answer below, creates the pdf file on the disk. I then streamed that file to the users browser as a download. Consider using something like Hath's answer below to get wkhtml2pdf to output to a stream instead and then send that directly to the user - that will bypass lots of issues with file permissions etc.
My original answer:
Make sure you've specified an output path for the PDF that is writeable by the ASP.NET process of IIS running on your server (usually NETWORK_SERVICE I think).
Mine looks like this (and it works):
/// <summary>
/// Convert Html page at a given URL to a PDF file using open-source tool wkhtml2pdf
/// </summary>
/// <param name="Url"></param>
/// <param name="outputFilename"></param>
/// <returns></returns>
public static bool HtmlToPdf(string Url, string outputFilename)
{
// assemble destination PDF file name
string filename = ConfigurationManager.AppSettings["ExportFilePath"] + "\\" + outputFilename + ".pdf";
// get proj no for header
Project project = new Project(int.Parse(outputFilename));
var p = new System.Diagnostics.Process();
p.StartInfo.FileName = ConfigurationManager.AppSettings["HtmlToPdfExePath"];
string switches = "--print-media-type ";
switches += "--margin-top 4mm --margin-bottom 4mm --margin-right 0mm --margin-left 0mm ";
switches += "--page-size A4 ";
switches += "--no-background ";
switches += "--redirect-delay 100";
p.StartInfo.Arguments = switches + " " + Url + " " + filename;
p.StartInfo.UseShellExecute = false; // needs to be false in order to redirect output
p.StartInfo.RedirectStandardOutput = true;
p.StartInfo.RedirectStandardError = true;
p.StartInfo.RedirectStandardInput = true; // redirect all 3, as it should be all 3 or none
p.StartInfo.WorkingDirectory = StripFilenameFromFullPath(p.StartInfo.FileName);
p.Start();
// read the output here...
string output = p.StandardOutput.ReadToEnd();
// ...then wait n milliseconds for exit (as after exit, it can't read the output)
p.WaitForExit(60000);
// read the exit code, close process
int returnCode = p.ExitCode;
p.Close();
// if 0 or 2, it worked (not sure about other values, I want a better way to confirm this)
return (returnCode == 0 || returnCode == 2);
}
I had the same problem when i tried using msmq with a windows service but it was very slow for some reason. (the process part).
This is what finally worked:
private void DoDownload()
{
var url = Request.Url.GetLeftPart(UriPartial.Authority) + "/CPCDownload.aspx?IsPDF=False?UserID=" + this.CurrentUser.UserID.ToString();
var file = WKHtmlToPdf(url);
if (file != null)
{
Response.ContentType = "Application/pdf";
Response.BinaryWrite(file);
Response.End();
}
}
public byte[] WKHtmlToPdf(string url)
{
var fileName = " - ";
var wkhtmlDir = "C:\\Program Files\\wkhtmltopdf\\";
var wkhtml = "C:\\Program Files\\wkhtmltopdf\\wkhtmltopdf.exe";
var p = new Process();
p.StartInfo.CreateNoWindow = true;
p.StartInfo.RedirectStandardOutput = true;
p.StartInfo.RedirectStandardError = true;
p.StartInfo.RedirectStandardInput = true;
p.StartInfo.UseShellExecute = false;
p.StartInfo.FileName = wkhtml;
p.StartInfo.WorkingDirectory = wkhtmlDir;
string switches = "";
switches += "--print-media-type ";
switches += "--margin-top 10mm --margin-bottom 10mm --margin-right 10mm --margin-left 10mm ";
switches += "--page-size Letter ";
p.StartInfo.Arguments = switches + " " + url + " " + fileName;
p.Start();
//read output
byte[] buffer = new byte[32768];
byte[] file;
using(var ms = new MemoryStream())
{
while(true)
{
int read = p.StandardOutput.BaseStream.Read(buffer, 0,buffer.Length);
if(read <=0)
{
break;
}
ms.Write(buffer, 0, read);
}
file = ms.ToArray();
}
// wait or exit
p.WaitForExit(60000);
// read the exit code, close process
int returnCode = p.ExitCode;
p.Close();
return returnCode == 0 ? file : null;
}
Thanks Graham Ambrose and everyone else.
OK, so this is an old question, but an excellent one. And since I did not find a good answer, I made my own :) Also, I've posted this super simple project to GitHub.
Here is some sample code:
var pdfData = HtmlToXConverter.ConvertToPdf("<h1>SOO COOL!</h1>");
Here are some key points:
No P/Invoke
No creating of a new process
No file-system (all in RAM)
Native .NET DLL with intellisense, etc.
Ability to generate a PDF or PNG (HtmlToXConverter.ConvertToPng)
Check out the C# wrapper library (using P/Invoke) for the wkhtmltopdf library: https://github.com/pruiz/WkHtmlToXSharp
There are many reason why this is generally a bad idea. How are you going to control the executables that get spawned off but end up living on in memory if there is a crash? What about denial-of-service attacks, or if something malicious gets into TestPDF.htm?
My understanding is that the ASP.NET user account will not have the rights to logon locally. It also needs to have the correct file permissions to access the executable and to write to the file system. You need to edit the local security policy and let the ASP.NET user account (maybe ASPNET) logon locally (it may be in the deny list by default). Then you need to edit the permissions on the NTFS filesystem for the other files. If you are in a shared hosting environment it may be impossible to apply the configuration you need.
The best way to use an external executable like this is to queue jobs from the ASP.NET code and have some sort of service monitor the queue. If you do this you will protect yourself from all sorts of bad things happening. The maintenance issues with changing the user account are not worth the effort in my opinion, and whilst setting up a service or scheduled job is a pain, its just a better design. The ASP.NET page should poll a result queue for the output and you can present the user with a wait page. This is acceptable in most cases.
You can tell wkhtmltopdf to send it's output to sout by specifying "-" as the output file.
You can then read the output from the process into the response stream and avoid the permissions issues with writing to the file system.
My take on this with 2018 stuff.
I am using async. I am streaming to and from wkhtmltopdf. I created a new StreamWriter because wkhtmltopdf is expecting utf-8 by default but it is set to something else when the process starts.
I didn't include a lot of arguments since those varies from user to user. You can add what you need using additionalArgs.
I removed p.WaitForExit(...) since I wasn't handling if it fails and it would hang anyway on await tStandardOutput. If timeout is needed, then you would have to call Wait(...) on the different tasks with a cancellationtoken or timeout and handle accordingly.
public async Task<byte[]> GeneratePdf(string html, string additionalArgs)
{
ProcessStartInfo psi = new ProcessStartInfo
{
FileName = #"C:\Program Files\wkhtmltopdf\wkhtmltopdf.exe",
UseShellExecute = false,
CreateNoWindow = true,
RedirectStandardInput = true,
RedirectStandardOutput = true,
RedirectStandardError = true,
Arguments = "-q -n " + additionalArgs + " - -";
};
using (var p = Process.Start(psi))
using (var pdfSream = new MemoryStream())
using (var utf8Writer = new StreamWriter(p.StandardInput.BaseStream,
Encoding.UTF8))
{
await utf8Writer.WriteAsync(html);
utf8Writer.Close();
var tStdOut = p.StandardOutput.BaseStream.CopyToAsync(pdfSream);
var tStdError = p.StandardError.ReadToEndAsync();
await tStandardOutput;
string errors = await tStandardError;
if (!string.IsNullOrEmpty(errors)) { /* deal/log with errors */ }
return pdfSream.ToArray();
}
}
Things I haven't included in there but could be useful if you have images, css or other stuff that wkhtmltopdf will have to load when rendering the html page:
you can pass the authentication cookie using --cookie
in the header of the html page, you can set the base tag with href pointing to the server and wkhtmltopdf will use that if need be
Thanks for the question / answer / all the comments above. I came upon this when I was writing my own C# wrapper for WKHTMLtoPDF and it answered a couple of the problems I had. I ended up writing about this in a blog post - which also contains my wrapper (you'll no doubt see the "inspiration" from the entries above seeping into my code...)
Making PDFs from HTML in C# using WKHTMLtoPDF
Thanks again guys!
The ASP .Net process probably doesn't have write access to the directory.
Try telling it to write to %TEMP%, and see if it works.
Also, make your ASP .Net page echo the process's stdout and stderr, and check for error messages.
Generally return code =0 is coming if the pdf file is created properly and correctly.If it's not created then the value is in -ve range.
using System;
using System.Diagnostics;
using System.Web;
public partial class pdftest : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
private void fn_test()
{
try
{
string url = HttpContext.Current.Request.Url.AbsoluteUri;
Response.Write(url);
ProcessStartInfo startInfo = new ProcessStartInfo();
startInfo.FileName =
#"C:\PROGRA~1\WKHTML~1\wkhtmltopdf.exe";//"wkhtmltopdf.exe";
startInfo.Arguments = url + #" C:\test"
+ Guid.NewGuid().ToString() + ".pdf";
Process.Start(startInfo);
}
catch (Exception ex)
{
string xx = ex.Message.ToString();
Response.Write("<br>" + xx);
}
}
protected void btn_test_Click(object sender, EventArgs e)
{
fn_test();
}
}