使用c将字节转换为图像＆图像到字节＃

Question

当前我正在使用asp.net and c#将图像存储到MySql（使用blob数据类型）。我成功地将其存储到数据库中，但现在的问题是how can i retrieve that byte[] to image format ?

功能：code to convert byte[] to image

public Image byteArrayToImage(byte[] byteArrayIn) 
    { 
     MemoryStream ms = new MemoryStream(byteArrayIn); 
     Image returnImage = Image.FromStream(ms); --> here gives me error as `parameter is not valid` 
     return returnImage; 

    } 

retieved如数据表...

if (dt1.Rows.Count > 0) 
     { 
      byteArrayToImage((byte[]) dt1.Rows[0]["PortfolioSlideImages"]); 
      //MemoryStream ms = new MemoryStream((byte[])dt1.Rows[0]["PortfolioSlideImages"]); 
      //Image returnImage = Image.FromStream(ms); 
      //return returnImage; 
     } 

Answer 1

试试这个功能，

public Image byteArrayToImage(byte[] byteArrayIn) 
{ 
    Image returnImage = null; 
    using (MemoryStream ms = new MemoryStream(byteArrayIn)) 
    { 
     returnImage = Image.FromStream(ms); 
    } 
    return returnImage; 
} 

for more info, visit this link