Question

我想知道如何修改我的下面的代码，以便我可以根据文件名确定文件是否已被复制。例如，文件名可能看起来像“Smith，＃10 FINAL 08-20-2010.dwg”，如果文件已经重新提交，那么它将看起来像这样的“Smith，＃10 FINAL 08-20-2010_1.dwg “或”史密斯，＃10 FINAL 08-20-2010_2.dwg“等...注意_1，_2等我需要能够确定该文件是否有_1，_2，_3等复制只有具有最大结束值的文件（假设它有一个）。我只是迷失了如何确定这一点。非常感谢..

//Now lets start searching the entire ARCHIVE folder/subfolders for a DWG that has
//this Well_Name and Actual_Date with FINAL in File Name...

DirectoryInfo myDir = new DirectoryInfo(@"C:\G-M");

//Collect the Final, Approved DWGs only...
var files = myDir.GetFileSystemInfos().Where(f => f.Name.Contains("FINAL") ||      f.Name.Contains(drow["Well_Name"].ToString()) || f.Name.Contains(drow["Actual_Date"].ToString()));




 //Copy to directory...
 foreach (FileInfo file in files)
 {
 //Lets loop through and check to see that the File has greatest value if it contains _1, _2, etc..


 System.IO.File.Copy(file.FullName, @"C:\FINAL" + file, true);  
 }

Answer 1

使用正则表达式

所以：

string pattern = @"_(\d+)\.dwg";
if (System.Text.RegularExpressions.Regex.IsMatch("file name", pattern, RegexOptions.IgnoreCase))
{ }

编辑：如何做到这一点的想法是：

System.Text.RegularExpressions.Regex myFileRegex = new Regex(@"_(\d+)\.dwg", RegexOptions.IgnoreCase);

SortedDictionary<string, int> fileFromNumber= new SortedDictionary<int, string>();

foreach (string filePath in Direcoty.GetFiles(@"you directory path")
{
    Match match = myFileRegex.Match(fileName);
    if (match.Groups.Count > 1)
    {
        fileFromNumber.Add(Convert.ToInt32(match.Groups[1].Value), filePath);
    }
}

string newestFile = fileFromNumber[fileFromNumber.Count - 1];//the last element

Answer 2

此代码应提供您需要的所有内容：

void Main()
{
    // this is your base scenario
    IEnumerable<FileInfo> fileInfos = new List<FileInfo>{new FileInfo("a_1"), new FileInfo("c"), new FileInfo("a"), new FileInfo("b"), new FileInfo("b_1000")};

    // now use the new class
    IEnumerable<ComparableFileInfo> cFileInfos = fileInfos.Select(x => new ComparableFileInfo(x));

    var nameGroups = cFileInfos.GroupBy(x => x.BaseName).Select(group => new {group.Key, MaxFile = group.Max()});

    foreach (var g in nameGroups.OrderBy(x => x.Key))
    {
        Console.WriteLine(g.MaxFile.OrigFileInfo.FullName);
    }   
}

class ComparableFileInfo : IComparable{

    public FileInfo OrigFileInfo; // omit getters and setters for brevity
    public int FileVersion; 
    public string BaseName;

    public ComparableFileInfo(FileInfo fileInfo){
        this.OrigFileInfo = fileInfo;
        int splitIdx = fileInfo.Name.LastIndexOf("_");
        this.BaseName = splitIdx < 0 ? fileInfo.Name : fileInfo.Name.Substring(0, splitIdx);
        string version = fileInfo.Name.Substring(splitIdx+1, fileInfo.Name.Length - splitIdx -1);
        int versionCast;
        this.FileVersion = Int32.TryParse(version, out versionCast) ? versionCast : 0;
    }

    public int CompareTo(object obj)
    {
        if (obj is ComparableFileInfo)
        {
            ComparableFileInfo f2 = (ComparableFileInfo)obj;
            return this.FileVersion.CompareTo(f2.FileVersion);
        }
        else
            throw new ArgumentException("Object is not a ComparableFileInfo");
    }   
}

输出是：

C：\用户\ XXX \桌面\ A_1

C：\用户\ XXX \桌面\ b_1000

C：\用户\ XXX \桌面\ C

如何使用c＃在Filename中搜索具有特定子字符串的文件的多个文件夹？

2 个答案: