How Do I Get Filebytes Of A File In Windows C#?

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C#

private void button1_Click(object sender, EventArgs e)
       {
           DialogResult dr = openFileDialog1.ShowDialog();
           if (dr == DialogResult.OK)
           {
               string filename = openFileDialog1.FileName;
               int len= openFileDialog1.FileName.Length;
           }

       }

Here, i am getting the length of a file but, infact i want filebytes of a file in byte[]....to compare it with the database file which is stored in binary data (image data type).

plz help...:)
thanks in advance...:)

Posted 24-Mar-14 21:39pm

Pranav-BiTwiser

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Bernhard Hiller 25-Mar-14 3:52am

Note that
int len= openFileDialog1.FileName.Length
tells you the length of the FILENAME in characters!

2 solutions

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Mehdi Gholam · Accepted Answer · 2014-03-24T21:50:00

Solution 1

Use File.ReadAllBytes():

C#

byte[] b = File.ReadAllBytes(filename);

Posted 24-Mar-14 21:50pm

Mehdi Gholam

Pranav-BiTwiser · Accepted Answer · 2014-03-24T21:59:00

Solution 2

Bitmap bmp = new Bitmap(image);
                FileStream fs = new FileStream(image, FileMode.Open, FileAccess.Read);
                byte[] bimage = new byte[fs.Length];

another way

Posted 24-Mar-14 21:59pm

Pranav-BiTwiser