MemoryStream 的使用

 

範例如下

using Newtonsoft.Json;
using System.IO;
using System.Net;
using System.Net.Http.Headers;
using System.Text;

namespace ConsoleApp1
{
    class Program
    {
        static async Task Main(string[] args)
        {
            byte[] sourceTextByte = Encoding.UTF8.GetBytes(“ABC”);
            MemoryStream memoryStream = new MemoryStream(sourceTextByte);
            byte[] destinationTextByte = new byte[sourceTextByte.Length];
            memoryStream.Read(destinationTextByte, 0, sourceTextByte.Length);
            Console.WriteLine(Encoding.UTF8.GetString(destinationTextByte));
            memoryStream.Close();
            byte[] sourceTextByte2 = Encoding.UTF8.GetBytes(“ABCDE”);
            MemoryStream memoryStream2 = new MemoryStream(sourceTextByte2);
            byte[] destinationTextByte2 = new byte[sourceTextByte2.Length];
            int index = 0;
            int readLength = 3;
            while (index < memoryStream2.Length)
            {
                long a = memoryStream2.Position;
                if (index + readLength > memoryStream2.Length)
                    index += memoryStream2.Read(destinationTextByte2, index, (int)memoryStream2.Length - index);
                else
                    index += memoryStream2.Read(destinationTextByte2, index, readLength);
            }
            Console.WriteLine(Encoding.UTF8.GetString(destinationTextByte2));
            memoryStream2.Close();
        }
    }
}

說明：

重點在於 MemoryStream 的 Read 參數的用法，語法如下，

MemoryStream.Read(目的寫入,寫入位置,寫入量)