C#讀取中文檔案亂碼的解方法

FileStream aFile = new FileStream(SingleFile, FileMode.Open);StreamReader sr = new StreamReader(aFile, Encoding.GetEncoding("gb2312"), true);string FileContent = sr.ReadToEnd();aFile.Close();ProcessData Pd = new ProcessData();Pd.ProceData(FileContent);

StreamReader 使用3個參數 最後一個自動檢測utf-8，中文大部分是gb2312，如果不是utf-8，就用gb2312


系統內建utf 檢測 ，見如下

private void DetectEncoding(){    if (this.byteLen >= 2)    {        this._detectEncoding = false;        bool flag = false;        if ((this.byteBuffer[0] == 0xfe) && (this.byteBuffer[1] == 0xff))        {            this.encoding = new UnicodeEncoding(true, true);            this.CompressBuffer(2);            flag = true;        }        else if ((this.byteBuffer[0] == 0xff) && (this.byteBuffer[1] == 0xfe))        {            if (((this.byteLen < 4) || (this.byteBuffer[2] != 0)) || (this.byteBuffer[3] != 0))            {                this.encoding = new UnicodeEncoding(false, true);                this.CompressBuffer(2);                flag = true;            }            else            {                this.encoding = new UTF32Encoding(false, true);                this.CompressBuffer(4);                flag = true;            }        }        else if (((this.byteLen >= 3) && (this.byteBuffer[0] == 0xef)) && ((this.byteBuffer[1] == 0xbb) && (this.byteBuffer[2] == 0xbf)))        {            this.encoding = Encoding.UTF8;            this.CompressBuffer(3);            flag = true;        }        else if ((((this.byteLen >= 4) && (this.byteBuffer[0] == 0)) && ((this.byteBuffer[1] == 0) && (this.byteBuffer[2] == 0xfe))) && (this.byteBuffer[3] == 0xff))        {            this.encoding = new UTF32Encoding(true, true);            this.CompressBuffer(4);            flag = true;        }        else if (this.byteLen == 2)        {            this._detectEncoding = true;        }        if (flag)        {            this.decoder = this.encoding.GetDecoder();            this._maxCharsPerBuffer = this.encoding.GetMaxCharCount(this.byteBuffer.Length);            this.charBuffer = new char[this._maxCharsPerBuffer];        }    }}

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