检索图像时参数无效

Question

string nama = dgGambar1.Rows[e.RowIndex].Cells["nama_gambar"].FormattedValue.ToString();
btnTambahDataBarang.Enabled = false;
koneksi.Open();
MySqlCommand command = new MySqlCommand("SELECT * FROM and_bwi_gambar WHERE nama_gambar = '" + nama + "'", koneksi);
MySqlDataReader rd;
rd = command.ExecuteReader();
while (rd.Read())
{
  txtGambar1.Text = rd.GetValue(2).ToString();
  byte[] img = (byte[])rd.GetValue(3);
  MemoryStream ms = new MemoryStream(img);
  pbGambar1.Image = Image.FromStream(ms);
}
koneksi.Close();

when i retrieve an image whose size is more than 250kb, it always get an error 'parameter argument invalid'

Answer 1

There could be 2 options to solve this:

1. using image converter:

    byte[] buffer = (byte[])rd.GetValue(3);
    using(var memStream = new MemoryStream(buffer))
    {
        var ic = new System.Drawing.ImageConverter();
        pbGambar1.Image = (System.Drawing.Image)ic.ConvertFrom(stream.ReadAllBytes());
    }

2. or try to load up binary data into memory stream first:

    byte[] buffer = (byte[])rd.GetValue(3);
    using(var memStream = new MemoryStream(buffer))
    {
        memStream.Position = 0;
        pbGambar1.Image = System.Drawing.Image.FromStream(memStream, false);
    }
}