请注意：我使用的Excel文件只有一列包含50,000个条目的数据.

1)用Excel打开文件,保存为csv,并关闭Excel.

2)使用StreamReader快速读取数据.

3)拆分回车换行上的数据并将其添加到字符串列表中.

4)删除我创建的csv文件.

我使用System.Diagnostics.StopWatch来执行时间,这个函数需要1.5568秒才能运行.

public static List<string> ExcelReader( string fileLocation )
{                       
    Microsoft.Office.Interop.Excel.Application excel = new Application();
    Microsoft.Office.Interop.Excel.Workbook workBook =
        excel.Workbooks.Open(fileLocation);
    workBook.SaveAs(
        fileLocation + ".csv",Microsoft.Office.Interop.Excel.XlFileFormat.xlCSVWindows
    );
    workBook.Close(true);
    excel.Quit();
    List<string> valueList = null;
    using (StreamReader sr = new StreamReader(fileLocation + ".csv")) {
        string content = sr.ReadToEnd();
        valueList = new List<string>(
            content.Split(
                new string[] {"\r\n"},StringSplitOptions.RemoveEmptyEntries
            )
        );
    }
    new FileInfo(fileLocation + ".csv").Delete();
    return valueList;
}

资源：

http://www.codeproject.com/Articles/5123/Opening-and-Navigating-Excel-with-C

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