Question

C#如何实现图片文件与数据流的转换

Answer 1

//----引入必要的命名空间 using System.IO; using System.Drawing.Imaging; //----代码部分----//powered by 25175.net private byte[] photo;//公用缓冲区 public string SourFilePath;//源图片文件路径 public string ObjFilePath;//目标图片路径 public int FileToStream()//文件到流的转换{Image img = new Bitmap(SourFilePath); MemoryStream stream = new MemoryStream(); img.Save(stream, ImageFormat.Bmp); BinaryReader br = new BinaryReader(stream); photo = stream.ToArray(); stream.Close();return 0;}public Image ShowPic()//根据流显图{byte[] bytes = photo; MemoryStream ms = new MemoryStream(bytes); ms.Position = 0; Image img = Image.FromStream(ms); ms.Close(); return img;}public int StreamToFile()//反向转换{byte[] bytes = photo; FileStream fs = new FileStream(ObjFilePath, FileMode.Create, FileAccess.Write); fs.Write(bytes, 0, bytes.Length);

Answer 2

C#如何实现图片文件与数据流的转换 需要使用文件流进行处理
以下是参考的代码：
//处理图像
string fileNmae=string.Empty;
OpenFileDialog openFileDialog1 = new OpenFileDialog();
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
fileNmae = openFileDialog1.FileName;
}
else
{
fileNmae = @"d:\对联1.jpg";
}

FileStream fs = new FileStream(fileNmae, FileMode.Open, FileAccess.Read);
Byte[] bytPic = new Byte[fs.Length];
fs.Read(bytPic, 0, bytPic.Length);
fs.Close();

数据流可以存储到数据库中，参考代码：
command.Parameters["@pic"].Value = bytPic;
connection.Open();
command.ExecuteNonQuery();