Convert webcam image into binary

Bhavesh Vankar

when i capture image using webcam and try to store into binary format in sql server its not working i have tried below code. whats wrong ...?

kindly suggest me right way....

my image control name is vimage

bold line is generating error "Empty path name is not legal."

my code is below

i have declare

string _imagepath2 = vimage.imageurl;
public static byte[] ImageToBinary(string _imgpath2)
{
FileStream fS = new FileStream(_imgpath2, FileMode.Open, FileAccess.Read);
byte[] b = new byte[fS.Length];
fS.Read(b, 0, (int)fS.Length);
fS.Close();
return b;
}

Error Is

Empty path name is not legal.

11 Replies

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Bhavesh Vankar5y ago
its showing error empty path is not valid in below line.
FileStream fS = new FileStream(_imgpath2, FileMode.Open, FileAccess.Read);
Mageshwaran R5y ago
Hi Vankar,
Try this code,
public static byte[] ImageToBinary(string _imgpath2)
       {
           FileStream fs = new FileStream(_imgpath2, FileMode.Open, FileAccess.Read);
    BinaryReader br = new BinaryReader(fs);
   Byte[] bytes = br.ReadBytes((Int32)fs.Length);
          br.Close();
   fs.Close();
           return bytes;
       }
Sachin Singh5y ago
i always go for the easiest one , if you already have a path then just read it as byte[] thats it.
byte[] b = File.ReadAllBytes(fullpathofFile);
Bhavesh Vankar5y ago
is this code is valid to convert into image to binary.
                  MemoryStream ms = new MemoryStream();
                   byte[] imgtobinary = new byte[ms.Length];
                   ms.Position = 0;
                   ms.Read(imgtobinary, 0, (int)ms.Length);
                   ms.Read(imgtobinary,0, imgtobinary.Length);
cmd.Parameters.AddWithValue("@S_IMAGE", imgtobinary) ;
its store value like in sql server database.
S_IMAGE
0x
Sachin Singh5y ago
string path =Convert.ToString(Session["vmsimage"]);
FileStream fS = new FileStream(path, FileMode.Open, FileAccess.Read);
Bhavesh Vankar5y ago
in below code the session is not working it showing me red lines.
how to use session.?
public static byte[] ImageToBinary(string _imgpath2)
       {
           FileStream fS = new FileStream(Session["vmsimage"].ToString(), FileMode.Open, FileAccess.Read);

  // FileStream fS = new FileStream(_imgpath2, FileMode.Open, FileAccess.Read);

           byte[] b = new byte[fS.Length];
            fS.Read(b, 0, (int)fS.Length);
            fS.Close();
            return b;
        }
Sachin Singh5y ago
No , due to security reasons the file selected or you assigned gets removed in the postback. you need to anyhow maintain the value during postbacks which is not possible untill you use sessions or something similar state management technique.
Bhavesh Vankar5y ago
can be it possible it without use of session.?
Sachin Singh5y ago
when you are actually taking pictures from webcam and assigning it to image control at that time store the path in a session variable and then use that session through out in the application.
FileStream fS = new FileStream(Session["ImagePath"].ToString(), FileMode.Open, FileAccess.Read);
Bhavesh Vankar5y ago
its showing null when cursor putting on it.
what to do image control has image but its showing null.
Sachin Singh5y ago
have tested by putting debugger and ensure that the line string _imagepath2 = vimage.imageurl;
_imagepath2 is not null?