using LFServer.Models;
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using System;
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using System.Collections.Generic;
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using System.Configuration;
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using System.Diagnostics;
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using System.IO;
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using System.Linq;
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using System.Web;
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namespace LFServer.cs
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{
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public static class ExportUtil
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{
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/// <summary>
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/// 基目录
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/// </summary>
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public static readonly string BaseDir = AppDomain.CurrentDomain.BaseDirectory;
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/// <summary>
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/// 最大文件数
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/// </summary>
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public const int MaxFileCount = 2000;
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private static string sourcesPath;
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/// <summary>
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/// 获取资源目录
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/// </summary>
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public static string SourcesPath
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{
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get
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{
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if (string.IsNullOrEmpty(sourcesPath))
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{
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sourcesPath = Path.Combine(BaseDir, "Sources");
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}
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return sourcesPath;
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}
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}
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private static string pyFile;
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/// <summary>
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/// 获取Python文件
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/// </summary>
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public static string PyFile
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{
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get
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{
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if (string.IsNullOrWhiteSpace(pyFile))
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{
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pyFile = Path.Combine(SourcesPath, "render.py");
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}
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return pyFile;
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}
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}
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/// <summary>
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/// 获取上期字符串
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/// </summary>
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public static string DateStr
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{
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get
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{
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return DateTime.Now.ToString("yyyyMMddHHmmss");
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}
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}
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/// <summary>
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/// 获取出图目录
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/// </summary>
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public static string ExportFolder
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{
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get
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{
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return ConfigurationManager.AppSettings["exportFolder"];
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}
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}
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/// <summary>
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/// 获取出图子目录
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/// </summary>
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public static string GetExportSubFolder()
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{
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string root = ExportFolder;
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if (!Directory.Exists(root))
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{
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Directory.CreateDirectory(root);
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}
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int i = 1;
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while (true)
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{
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string subFolder = Path.Combine(root, i.ToString());
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if (!Directory.Exists(subFolder))
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{
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Directory.CreateDirectory(subFolder);
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break;
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}
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DirectoryInfo dir = new DirectoryInfo(subFolder);
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FileInfo[] files = dir.GetFiles();
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if (files == null || files.Length < MaxFileCount)
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{
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break;
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}
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i++;
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}
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return i.ToString();
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}
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/// <summary>
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/// 执行Python
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/// </summary>
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/// <param name="py">Python文件</param>
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/// <param name="qgz">QGIS工程</param>
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/// <param name="qpt">QGIS模板</param>
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/// <returns>执行结果</returns>
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public static string ExecPython(string py, string qgz, string qpt)
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{
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string str = null;
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try
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{
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string cmdText = string.Format("python {0} -qgz {1} -qpt {2}", py, qgz, qpt);
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Process p = new Process();
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p.StartInfo.FileName = "cmd.exe";
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p.StartInfo.UseShellExecute = false;
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p.StartInfo.CreateNoWindow = true;
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p.StartInfo.RedirectStandardInput = true;
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p.StartInfo.RedirectStandardOutput = true;
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p.StartInfo.RedirectStandardError = true;
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p.Start();
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StreamWriter si = p.StandardInput; // 标准输入流
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StreamReader so = p.StandardOutput; // 标准输出流
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StreamReader se = p.StandardError; // 标准错误流
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si.AutoFlush = true;
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si.WriteLine(cmdText);
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si.WriteLine("exit");
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string info = so.ReadToEnd();
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str = se.ReadToEnd();
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if (p.HasExited == false)
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{
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p.Kill();
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}
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si.Close();
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so.Close();
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se.Close();
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p.Close();
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}
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catch (Exception ex)
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{
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str = ex.Message;
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}
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return str;
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}
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/// <summary>
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/// 生成
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/// </summary>
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/// <param name="args">出图参数</param>
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/// <returns>图片路径</returns>
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public static string Generate(ExportArgs args)
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{
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string date = DateStr;
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string sub = GetExportSubFolder();
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string qgz = "Test.qgz";
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args.imgPath = sub + "\\" + date + ".png";
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args.qpt = date + ".qpt";
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args.SetDefault();
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CreateTemplate(args);
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string info = ExecPython(PyFile, qgz, args.qpt);
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string qptFile = Path.Combine(SourcesPath, args.qpt);
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if (File.Exists(qptFile))
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{
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File.Delete(qptFile);
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}
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return args.imgPath;
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}
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/// <summary>
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/// 创建模板
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/// </summary>
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/// <param name="args">出图参数</param>
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public static void CreateTemplate(ExportArgs args)
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{
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string imgPath = Path.Combine(ExportFolder, args.imgPath);
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string templateFile = Path.Combine(SourcesPath, "Test.qpt");
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string qptFile = Path.Combine(SourcesPath, args.qpt);
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if (File.Exists(qptFile))
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{
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File.Delete(qptFile);
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}
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string xml = File.ReadAllText(templateFile);
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xml = xml
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.Replace("{dpi}", args.dpi.ToString())
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.Replace("{title}", args.title)
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.Replace("{rotation}", args.rotation.ToString())
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.Replace("{xmin}", args.xmin.ToString())
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.Replace("{ymin}", args.ymin.ToString())
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.Replace("{ymax}", args.ymax.ToString())
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.Replace("{xmax}", args.xmax.ToString())
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.Replace("{province}", args.province)
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.Replace("{scale}", args.scale)
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.Replace("{resolution}", args.resolution)
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.Replace("{date}", args.date)
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.Replace("{layers}", args.layers)
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.Replace("{imgPath}", imgPath);
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File.WriteAllText(qptFile, xml);
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}
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}
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}
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