从保存到SQL Server中字节字段的文本文件读取内容

Question

I'm missing something in between. I store the CSV file content in databas, not in a file. The 2nd line below is wrong, I want to read the byte data and assign it to array of lines. So I can loop the results as if I had read directly from a file on disk. Many thanks...

FileContentResult x23File = File(x23.FileData, 
                                "application/text", x23.Filename);

string[] Lines = System.Text.Encoding.UTF8.GetString(x23File);

Answer 1

If we assume that x23.FileData is a byte[] , you probably want:

List<string> lines = new List<string>();
using(var ms = new MemoryStream(x23.FileData))
using(var reader = new StreamReader(ms, Encoding.UTF8))
{
    string line;
    while((line = reader.ReadLine()) != null)
        lines.Add(line);
}

Now lines has all the separate lines. Note you could also consume this data in a non-buffered way via IEnumerable<string> . For example:

static IEnumerable<string> ReadLines(byte[] source, Encoding enc = null)
{
    using(var ms = new MemoryStream(source))
    using(var reader = new StreamReader(ms, enc ?? Encoding.UTF8))
    {
        string line;
        while((line = reader.ReadLine()) != null)
            yield return line;
    }
}

Answer 2

You are getting that error because x23File is not a byte[] . Your second line should actually be

string[] Lines = System.Text.Encoding.UTF8.GetString(x23File.FileContents).Split(new String[]{"\\r\\n"}, StringSplitOptions.None);