Question

我创建了一个代码来获取目录名的版本号，例如这个名为Update5.0.1的文件夹我只需要“5.0.1”部分。我将目录路径传递给此函数：

public int CompareVersion(string NovoUpdate, string Config)
{
      int Status = 0;
      try
      {
          ExeConfigurationFileMap configOld = new ExeConfigurationFileMap();
          configOld.ExeConfigFilename = Config;
          Configuration config = ConfigurationManager.OpenMappedExeConfiguration(configOld, ConfigurationUserLevel.None);
          if (config.AppSettings.Settings["Version"] != null)
          {
              string value = config.AppSettings.Settings["Version"].Value.ToString();
              Version ver = Version.Parse(value);
              Version version = null;
              Version VersionFinal = null;
              var lastVersion = new DirectoryInfo(NovoUpdate).FullName;
        //.Where(d => d.Name.StartsWith("UPDATE_"))
        .Select(d => new { Directory = d, Token = d.Name.Split('_') })
        .Where(x => x.Token.Length == 3 && Version.TryParse(x.Token[2], out version))
        .Select(x => new { x.Directory, Date = x.Token[1], Version = version })
        .OrderByDescending(x => x.Version)
        .FirstOrDefault();
              if (lastVersion != null)
              {
                  VersionFinal = Version.Parse(lastVersion.ToString());
              }

              if (ver >= VersionFinal)
                  Status = 1;
              else
                  Status = 0;
          }
          else Status = -1;
      }
      catch (Exception ex)
      {
          Erro NovoErro = new Erro();
          Program.Erro = ex.ToString();
          NovoErro.ShowDialog();
      }
      return Status;
 }

我在这一行有错误：

var lastVersion = new DirectoryInfo(NovoUpdate);
            //.Where(d => d.Name.StartsWith("UPDATE_"))
            .Select(d => new { Directory = d, Token = d.Name.Split('_') })

我已经尝试将“lastVersion”更改为字符串或只是使用 “NovoUpdate”字符串而不是DirectoryInfo。我真的不知道如何使用linq任何帮助都是aprecciated。

Answer 1

我想你忘了打电话给＃34; GetDirectories ＆＃34;方法，如：

new DirectoryInfo(NovoUpdate).GetDirectories().Select...

Answer 2

如果您只想从目录名称中提取版本，则不需要Linq。

尝试

string path = @"C:\Path\Update5.0.1";
string name = System.IO.Path.GetFileName(path);
string match = System.Text.RegularExpressions.Regex.Match(name, @"\d\.\d\.\d");
string version = match.Value;

您将获得＆＃34; 5.0.1＆＃34;

Answer 3

以下是最终完整工作的代码：

public int CompareVersion(string NovoUpdate, string Config, bool ServiceChanged)
        {
            Global.Erro = "";
            Global.ErroGrave = false;
            int Status = 0;
                ExeConfigurationFileMap configOld = new ExeConfigurationFileMap();
                configOld.ExeConfigFilename = Config;
                Configuration config = ConfigurationManager.OpenMappedExeConfiguration(configOld, ConfigurationUserLevel.None);
            if (config.AppSettings.Settings["Version"] != null)
            {
                string value = config.AppSettings.Settings["Version"].Value.ToString();
                Version ver = Version.Parse(value);
                Version versione = null;
                if (System.IO.Path.GetFileName(NovoUpdate).ToLower() == "orcaservice")
                {
                    string name2 = Directory.GetParent(NovoUpdate).ToString();
                    string Versionn = System.IO.Path.GetFileName(name2);
                    string[] Versions2 = Versionn.Split('_');
                    Version.TryParse(Versions2[2], out versione);
                }
                else
                {


                }
                if (ver < versione)
                    Status = 1;
                else
                    Status = 0;
            }

            else Status = -1;




            return Status;
        }

获取目录名的数字版本时出错

3 个答案: