我如何在块中使用 File.ReadAllBytes [英] How do I use File.ReadAllBytes In chunks

问题描述

我正在使用此代码

        string location1 = textBox2.Text;
        byte[] bytes = File.ReadAllBytes(location1);
        string text = (Convert.ToBase64String(bytes));
        richTextBox1.Text = text;

但是当我使用一个太大的文件时，我会出现内存不足的异常.

But when I use a file that is too big I get out of memory exception.

我想在块中使用 File.ReadAllBytes.我在下面看到过这样的代码

I want to use File.ReadAllBytes in chunks. I have seen code like this below

System.IO.FileStream fs = new System.IO.FileStream(textBox2.Text, System.IO.FileMode.Open);
byte[] buf = new byte[BUF_SIZE];
int bytesRead;

// Read the file one kilobyte at a time.
do
{
    bytesRead = fs.Read(buf, 0, BUF_SIZE);               
    // 'buf' contains the last 1024 bytes read of the file.

} while (bytesRead == BUF_SIZE);

fs.Close();

}

但我不知道如何将 bytesRead 实际转换成一个字节数组，然后我将其转换为文本.

But I don't know how to actually convert the bytesRead into a byte array which I will convert to text.

找到答案.这是代码！

 private void button1_Click(object sender, EventArgs e)
    {
        const int MAX_BUFFER = 2048;
        byte[] Buffer = new byte[MAX_BUFFER];
        int BytesRead;
        using (System.IO.FileStream fileStream = new FileStream(textBox2.Text, FileMode.Open, FileAccess.Read))
            while ((BytesRead = fileStream.Read(Buffer, 0, MAX_BUFFER)) != 0)
            {
                string text = (Convert.ToBase64String(Buffer));
                textBox1.Text = text;

            }

}

要更改文本格式的可读字节，请创建一个新字节并使其相等(Convert.FromBase64String(Text)).谢谢大家！

To change the readable bytes which are in text format, create a new byte and make it equal (Convert.FromBase64String(Text)). Thanks everyone!

推荐答案

private void button1_Click(object sender, EventArgs e)
{
    const int MAX_BUFFER = 2048;
    byte[] Buffer = new byte[MAX_BUFFER];
    int BytesRead;
    using (System.IO.FileStream fileStream = new FileStream(textBox2.Text, FileMode.Open, FileAccess.Read))
        while ((BytesRead = fileStream.Read(Buffer, 0, MAX_BUFFER)) != 0)
        {
            string text = (Convert.ToBase64String(Buffer));
            textBox1.Text = text;

        }
}

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