C#實現TXT文檔轉DataTable

C#實現TXT文檔轉DataTable

代碼：

      public DataTable TXTToDataTable(string fileName, string columnName)
        {
            DataTable dt = new DataTable();
            FileStream fs = new FileStream(fileName, System.IO.FileMode.Open, System.IO.FileAccess.Read);
            StreamReader sr = new StreamReader(fs, System.Text.Encoding.Default);
            //記錄每次讀取的一行記錄
            string strLine = "";

            //記錄每行記錄中的各字段內容
            string[] aryLine;
            //標示列數           
            int columnCount = 0;
            //標示是否是讀取的第一行
            bool IsFirst = true;
          
            if (IsFirst == true)
            {
                if (columnName=="")
                {
                    //說明txt包含列名時，不傳入列名，用過讀取獲得列名,一般用tab分隔
                    strLine = sr.ReadLine();
                    aryLine = strLine.Split('\t');//tab分隔符
                }
                else
                {
                    strLine = columnName;
                    aryLine = strLine.Split(',');//傳入列名用逗號分隔
                }
                           
                IsFirst = false;
                columnCount = aryLine.Length;
                //創建列
                for (int i = 0; i < columnCount; i++)
                {
                    DataColumn dc = new DataColumn(aryLine[i].ToUpper());
                    dt.Columns.Add(dc);
                }
            }

            //逐行讀取txt中的數據
            while ((strLine = sr.ReadLine()) != null)
            {
                aryLine = strLine.Split('\t');//tab分隔符
                DataRow dr = dt.NewRow();
                for (int j = 0; j < columnCount; j++)
                {
                    dr[j] = aryLine[j].ToUpper();
                }
                dt.Rows.Add(dr);
            }

            sr.Close();
            fs.Close();
            return dt;
        }