asp.net - 在 Asp.net 中运行外部可执行文件的内存限制

Question

我在 .NET 4.0 中运行的 C# Web 应用程序中使用 WkhtmltoPdf 从 HTML 文件生成 PDF。一般来说，除非 HTML 文件大小低于 250KB，否则一切正常。一旦 HTML 文件大小增加超过该大小，运行 wkhtmltopdf.exe 的进程就会出现如下异常。在任务管理器上，我看到 wkhtmltopdf.exe 进程的内存值不会增加超过 40,096 K 的值，我认为这就是该进程在其间被放弃的原因。

我们如何配置才能增加外部 exe 的内存限制？还有其他方法可以解决这个问题吗？

更多信息:
当我直接从命令行运行转换时，PDF 生成得很好。因此，这不太可能是 WkhtmlToPdf 的问题。

错误来自本地主机。我在DEV服务器上尝试了同样的方法，得到了相同的结果。

编辑:

More specific exception message: - For the MainModule property of the Process object, the error says - {"Only part of a ReadProcessMemory or WriteProcessMemory request was completed"}, with the NativeErrorCode value - 299.

异常(exception):

> [Exception: Loading pages (1/6) [>                                    
> ] 0% [======>                                                     ]
> 10% [======>                                                     ] 11%
> [=======>                                                    ] 13%
> [=========>                                                  ] 15%
> [==========>                                                 ] 18%
> [============>                                               ] 20%
> [=============>                                              ] 22%
> [==============>                                             ] 24%
> [===============>                                            ] 26%
> [=================>                                          ] 29%
> [==================>                                         ] 31%
> [===================>                                        ] 33%
> [=====================>                                      ] 35%
> [======================>                                     ] 37%
> [========================>                                   ] 40%
> [=========================>                                  ] 42%
> [==========================>                                 ] 44%
> [============================>                               ] 47%
> [=============================>                              ] 49%
> [==============================>                             ] 51%
> [============================================================] 100%
> Counting pages (2/6)                                               
> [============================================================] Object
> 1 of 1 Resolving links (4/6)                                          
> [============================================================] Object
> 1 of 1 Loading headers and footers (5/6)                              
> Printing pages (6/6) [>                                               
> ] Preparing [=>                                                       
> ] Page 1 of 49 [==>                                                   
> ] Page 2 of 49 [===>                                                  
> ] Page 3 of 49 [====>                                                 
> ] Page 4 of 49 [======>                                               
> ] Page 5 of 49 [=======>                                              
> ] Page 6 of 49 [========>                                             
> ] Page 7 of 49 [=========>                                            
> ] Page 8 of 49 [==========>                                           
> ] Page 9 of 49 [============>                                         
> ] Page 10 of 49 [=============>                                       
> ] Page 11 of 49 [==============>                                      
> ] Page 12 of 49 [===============>                                     
> ] Page 13 of 49 [================>                                    
> ] Page 14 of 49 [==================>                                  
> ] Page 15 of 49 [===================>                                 
> ] Page 16 of 49 [====================>                                
> ] Page 17 of 49 [=====================>                               
> ] Page 18 of 49 [======================>                              
> ] Page 19 of 49 [========================>                            
> ] Page 20 of 49 [=========================>                           
> ] Page 21 of 49 [==========================>                          
> ] Page 22 of 49 [===========================>                         
> ] Page 23 of 49 [============================>                        
> ] Page 24 of 49 [==============================>                      
> ] Page 25 of 49 [===============================>                     
> ] Page 26 of 49 [=================================>                   
> ] Page 27 of 49 [==================================>                  
> ]

我使用的代码:

    var fileName = " - ";
    var wkhtmlDir = ConfigurationManager.AppSettings[Constants.AppSettings.ExportToPdfExecutablePath];
    var wkhtml = ConfigurationManager.AppSettings[Constants.AppSettings.ExportToPdfExecutablePath] + "\\wkhtmltopdf.exe";
    var p = new Process();


    string switches = "";
    switches += "--print-media-type ";
    switches += "--margin-top 10mm --margin-bottom 10mm --margin-right 5mm --margin-left 5mm ";
    switches += "--page-size A4 ";
    switches += "--disable-smart-shrinking ";

    var startInfo = new ProcessStartInfo
    {
        CreateNoWindow = true,
        FileName = wkhtml,
        Arguments = switches + " " + url + " " + fileName,
        UseShellExecute = false,
        RedirectStandardOutput = true,
        RedirectStandardError = true,
        RedirectStandardInput=true,
        WorkingDirectory=wkhtmlDir
    };

    p.StartInfo = startInfo;
    p.Start();

WkHtmlToPdf.exe 进程的调试器屏幕截图:

Answer 1

这就是您要找的:

http://jobobjectwrapper.codeplex.com/

我找不到任何其他与“增加”进程内存限制有关的内容，尽管我听说有人使用 MaxWorkingSet 限制进程内存，但我相信这只是在应用程序使用完所有可用的虚拟内存后。

作业对象是一个很好的起点，它们只是易于控制的流程的集合。

"With this library you can create job objects, create and assign a process to the job, control process and job limits, and register for the various process- and job-related notification events."

这也可能有用:

Calling wkhtmltopdf to generate PDF from HTML