C# 將絕對路徑轉換為相對路徑

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引言

 

在項目中常需要將絕對路徑，轉換為相對路徑，來增加程式相關配置的的靈活性（不用因為整體挪個位置就導致我們的程式不能正常工作）

 

解決問題方法

 

自己寫代碼解決：

private string RelativePath(string absolutePath, string relativeTo)        {            string[] absoluteDirectories = absolutePath.Split(‘\\‘);            string[] relativeDirectories = relativeTo.Split(‘\\‘);            //Get the shortest of the two paths            int length = absoluteDirectories.Length < relativeDirectories.Length ? absoluteDirectories.Length : relativeDirectories.Length;            //Use to determine where in the loop we exited            int lastCommonRoot = -1;            int index;            //Find common root            for (index = 0; index < length; index++)                if (absoluteDirectories[index] == relativeDirectories[index])                    lastCommonRoot = index;                else                    break;            //If we didn‘t find a common prefix then throw            if (lastCommonRoot == -1)                throw new ArgumentException("Paths do not have a common base");            //Build up the relative path            StringBuilder relativePath = new StringBuilder();            //Add on the ..            for (index = lastCommonRoot + 1; index < absoluteDirectories.Length; index++)                if (absoluteDirectories[index].Length > 0)                    relativePath.Append("..\\");            //Add on the folders            for (index = lastCommonRoot + 1; index < relativeDirectories.Length - 1; index++)                relativePath.Append(relativeDirectories[index] + "\\");            relativePath.Append(relativeDirectories[relativeDirectories.Length - 1]);            return relativePath.ToString();        }

 

通過C#中URI類來解決：

System.Uri uri1 = new Uri(@"C:\filename.txt");System.Uri uri2 = new Uri(@"C:\mydirectory\anotherdirectory\"); Uri relativeUri = uri2.MakeRelativeUri(uri1); Console.WriteLine(relativeUri.ToString());

 

 

參考文獻

 

http://msdn.microsoft.com/en-us/library/system.uri.makerelativeuri(v=vs.110).aspx

 

相對路徑

C# 將絕對路徑轉換為相對路徑