studyzy/imewlconverter · error · ArgumentException

文件路径不能为空

Error message

文件路径不能为空

What it means

FileOperationHelper.GetEncodingType auto-detects a file's text encoding via UtfUnknown. It throws ArgumentException (with paramName=fileName) when the path argument is null or whitespace — a standard input precondition on the public method.

Source

Thrown at src/ImeWlConverter.Core/Helpers/FileOperationHelper.cs:113

            sw.WriteLine(line);
            return true;
        }
        catch
        {
            return false;
        }
    }

    public static StreamWriter GetWriteFileStream(string path, Encoding coding)
    {
        return new StreamWriter(path, false, coding);
    }

    public static Encoding GetEncodingType(string fileName)
    {
        if (string.IsNullOrWhiteSpace(fileName))
        {
            throw new ArgumentException("文件路径不能为空", nameof(fileName));
        }

        if (!File.Exists(fileName))
        {
            throw new FileNotFoundException($"文件不存在: {fileName}");
        }

        try
        {
            var result = CharsetDetector.DetectFromFile(fileName);
            var resultDetected = result?.Detected;

            if (resultDetected == null || resultDetected.Confidence < 0.7)
            {
                try
                {
                    return Encoding.GetEncoding("GB18030");
                }

View on GitHub (pinned to 16744a12ed)

Solutions

1. Validate the path is non-empty at the CLI/GUI trust boundary before calling GetEncodingType.
2. If empty/missing files should be tolerated, call ReadFile(path) which returns "" instead of throwing.
3. Bind the input field to a required-field validator so submission is blocked when empty.

Example fix

// before
var enc = FileOperationHelper.GetEncodingType(path);
// after
if (string.IsNullOrWhiteSpace(path))
    throw new ArgumentException("path required", nameof(path));
var enc = FileOperationHelper.GetEncodingType(path);

if (string.IsNullOrWhiteSpace(fileName))
    throw new ArgumentException("path required", nameof(fileName));

try { var enc = FileOperationHelper.GetEncodingType(path); }
catch (ArgumentException) { /* empty path, abort or prompt */ }

When it happens

Trigger: Calling GetEncodingType(null), GetEncodingType(""), or GetEncodingType(" "); or when a GUI/CLI field bound to a file path is submitted empty.

Common situations: GUI input-file text box left blank but conversion triggered; CLI invoked with an empty -i/--if argument; a glob/wildcard that resolved to an empty path string.

Related errors

• 找不到拼音
• 文件不存在: {fileName}
• 找不到拼音
• 词库文件格式不正确,文件大小至少需要{UserWordBase}字节,当前为{fileSize}字节

AI-assisted analysis of studyzy/imewlconverter@16744a12ed (2026-08-13). Data as JSON: /api/errors/93c8c909f8fff6a5. Report an issue: GitHub.