我可以轉(zhuǎn)換pathAndFilename為小寫，但我需要一種方法來區(qū)分OpenRead大小寫。// pathAndFileName has been converted with .ToLower()using (FileStream fileStream = File.OpenRead(pathAndFileName)){ Bitmap bitmap = new Bitmap(fileStream); Image image = (Image)bitmap;}
3 回答
子衿沉夜
TA貢獻(xiàn)1828條經(jīng)驗(yàn) 獲得超3個(gè)贊
如果您嘗試訪問運(yùn)行 Linux 或文件名區(qū)分大小寫的其他操作系統(tǒng)的計(jì)算機(jī)上的文件，解決方法可能是（未測試?。┦褂媚鷵碛械奈募鳛槟Ｊ絹砹谐瞿夸浿械奈募?。請注意，可能有多個(gè)文件具有相同的名稱，只是不同的拼寫形式。在這種情況下，此輔助函數(shù)將引發(fā)異常。
static void Main(string[] args)
{
string pathAndFileName = ..your file name...;
string resultFileName = GetActualCaseForFileName(pathAndFileName);
using (FileStream fileStream = File.OpenRead(resultFileName))
{
Bitmap bitmap = new Bitmap(fileStream);
Image image = (Image)bitmap;
}
Console.WriteLine(resultFileName);
}
private static string GetActualCaseForFileName(string pathAndFileName)
{
string directory = Path.GetDirectoryName(pathAndFileName);
string pattern = Path.GetFileName(pathAndFileName);
string resultFileName;
// Enumerate all files in the directory, using the file name as a pattern
// This will list all case variants of the filename even on file systems that
// are case sensitive
IEnumerable<string> foundFiles = Directory.EnumerateFiles(directory, pattern);
if (foundFiles.Any())
{
if (foundFiles.Count() > 1)
{
// More than two files with the same name but different case spelling found
throw new Exception("Ambiguous File reference for " + pathAndFileName);
}
else
{
resultFileName = foundFiles.First();
}
}
else
{
throw new FileNotFoundException("File not found" + pathAndFileName, pathAndFileName);
}
return resultFileName;
}
蕪湖不蕪
TA貢獻(xiàn)1796條經(jīng)驗(yàn) 獲得超7個(gè)贊
我受到包含 GetActualCaseForFileName() 的答案的啟發(fā)，但它不適用于我的 Xamarin iOS 項(xiàng)目。
我創(chuàng)建了以下代碼，這似乎對我有用：
public string getCaseNudgedPathName( string origPath) {
var retPath = origPath;
var dir = Path.GetDirectoryName( origPath);
var pattern = Path.GetFileName( origPath);
var foundFiles = Directory.GetFiles(dir);
int countMatch = 0;
foreach (var foundFile in foundFiles) {
if ( foundFile.Equals(origPath,IgnoreCase)) {
countMatch++;
retPath = foundFile;
}
}
if (countMatch > 1) {
throw new Exception( $"Ambiguous filename '{pattern}'");
}
return retPath;
}
慕容708150
TA貢獻(xiàn)1831條經(jīng)驗(yàn) 獲得超4個(gè)贊
對于區(qū)分大小寫的文件和目錄，您需要結(jié)合第一個(gè)答案和：
private static string GetActualCaseForFileName(string pathAndFileName)
{
string directory = Path.GetDirectoryName(pathAndFileName);
string directoryCaseSensitive = GetDirectoryCaseSensitive(directory)
...
}
private static string GetDirectoryCaseSensitive(string directory)
{
var directoryInfo = new DirectoryInfo(directory);
if (directoryInfo.Exists)
{
return directory;
}
if (directoryInfo.Parent == null)
{
return null;
}
var parent = GetDirectoryCaseSensitive(directoryInfo.Parent.FullName);
if (parent == null)
{
return null;
}
return new DirectoryInfo(parent).GetDirectories(directoryInfo.Name, new EnumerationOptions {MatchCasing = MatchCasing.CaseInsensitive}).FirstOrDefault()?.FullName;
}
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