I'm having the wierdest problem. I'm trying to save images into a SQL 2005
database. the field is just called "IMAGES" and hte data type is "image".
here is my code to save
//following code saves an image as a byte array to a DB
string strFn = this.openFileDi alog1.FileName;
this.pictureBox 1.Image = Image.FromFile( strFn);
FileInfo fiImage = new FileInfo(strFn) ;
m_lImageFileLen gth = fiImage.Length;
FileStream fs = new FileStream(strF n, FileMode.Open, FileAccess.Read ,
FileShare.Read) ;
fs.Seek(0, SeekOrigin.Begi n);
m_barrImg = new byte[Convert.ToInt32 (m_lImageFileLe ngth)];
int iBytesRead = fs.Read(m_barrI mg, 0, Convert.ToInt32 (m_lImageFileLe ngth));
fs.Close();
//method takes in customerID, and byte array of image data
savepicture(Cus tomerID, m_barrImg
//the following code pulls it back out
//first get the byte array back from SQL using this method.
Byte[] barrImg = DBAccess.getima ge(CustomerID);
string strfn = Convert.ToStrin g(DateTime.Now. ToFileTime());
FileStream fs1 = new FileStream(strf n, FileMode.Create New, FileAccess.Writ e);
fs1.Write(barrI mg, 0, barrImg.Length) ;
fs1.Flush();
fs1.Close();
//try to display it
pictureBox1.Ima ge = Image.FromFile( strfn);
my proble is that when I get it BACK, the byte array size is only 13! when I
put it in, it's much larger than that.
why is it always 13 ? what am I doing wrong? the methods for update and
select are basic UPDATE TABLE SET IMAGE = ' m_BarrImg ' WHERE CUSTOMERID =
(whatever) , and the SELECT is the same simplicity SELECT IMAGE WHERE
CUSTOMERID = (whatever).
why is this happening? I have tried to a couple hours now. thanks.
PS. NO stored procedures thanks. :) 3 4399
Rogelio wrote:
I'm having the wierdest problem. I'm trying to save images into a SQL 2005
database. the field is just called "IMAGES" and hte data type is "image".
here is my code to save
//the following code pulls it back out
//first get the byte array back from SQL using this method.
Byte[] barrImg = DBAccess.getima ge(CustomerID);
my proble is that when I get it BACK, the byte array size is only 13! when I
put it in, it's much larger than that.
why is it always 13 ? what am I doing wrong? the methods for update and
select are basic UPDATE TABLE SET IMAGE = ' m_BarrImg ' WHERE CUSTOMERID =
(whatever) , and the SELECT is the same simplicity SELECT IMAGE WHERE
CUSTOMERID = (whatever).
How does the code in DBAccess.getima ge look like ?
Arne
On Sat, 04 Aug 2007 01:06:02 +0200, Rogelio <Ro*****@discus sions.microsoft .comwrote:
I'm having the wierdest problem. I'm trying to save images into a SQL 2005
database. the field is just called "IMAGES" and hte data type is "image".
here is my code to save
//following code saves an image as a byte array to a DB
string strFn = this.openFileDi alog1.FileName;
this.pictureBox 1.Image = Image.FromFile( strFn);
FileInfo fiImage = new FileInfo(strFn) ;
m_lImageFileLen gth = fiImage.Length;
FileStream fs = new FileStream(strF n, FileMode.Open, FileAccess.Read ,
FileShare.Read) ;
fs.Seek(0, SeekOrigin.Begi n);
m_barrImg = new byte[Convert.ToInt32 (m_lImageFileLe ngth)];
int iBytesRead = fs.Read(m_barrI mg, 0, Convert.ToInt32 (m_lImageFileLe ngth));
fs.Close();
//method takes in customerID, and byte array of image data
savepicture(Cus tomerID, m_barrImg
//the following code pulls it back out
//first get the byte array back from SQL using this method.
Byte[] barrImg = DBAccess.getima ge(CustomerID);
string strfn = Convert.ToStrin g(DateTime.Now. ToFileTime());
FileStream fs1 = new FileStream(strf n, FileMode.Create New, FileAccess.Writ e);
fs1.Write(barrI mg, 0, barrImg.Length) ;
fs1.Flush();
fs1.Close();
//try to display it
pictureBox1.Ima ge = Image.FromFile( strfn);
my proble is that when I get it BACK, the byte array size is only 13! when I
put it in, it's much larger than that.
why is it always 13 ? what am I doing wrong? the methods for update and
select are basic UPDATE TABLE SET IMAGE = ' m_BarrImg ' WHERE CUSTOMERID =
(whatever) , and the SELECT is the same simplicity SELECT IMAGE WHERE
CUSTOMERID = (whatever).
why is this happening? I have tried to a couple hours now. thanks.
PS. NO stored procedures thanks. :)
I don't see anything particularly wrong with your code (that my sleepy eyes registeres at 1:38), although you do seem overly fond of Convert, which isn't necessary. You should also enclose your streams in using statements, and use SqlParameters in your save/read database methods.
It might be worth rewriting it IMAGE to [IMAGE] (tells the SQL server that you are talking about the IMAGE field and not the IMAGE data type
string strFn = this.openFileDi alog1.FileName;
FileInfo fiImage = new FileInfo(strFn) ;
using (FileStream fs = File.OpenRead(s trFn))
{
byte[] data = new byte[fiImage.Length];
int iBytesRead = fs.Read(data, 0, fiImage.Length) ;
savepicture(Cus tomerID, data);
}
string strfn = DateTime.Now.To FileTime().ToSt ring());
using (FileStream fs1 = File.Create(str fn))
{
byte[] barrImg = DBAccess.getima ge(CustomerID);
fs1.Write(barrI mg, 0, barrImg.Length) ;
}
If you post your save and read methods I'll take a look at them tomorrow(that is, later today) unless you get your answers before then.
--
Happy coding!
Morten Wennevik [C# MVP]
I figured it out. after about 5 hours of searching and searching. the problem
is my UPDATE statement. I cant use
UPDATE TABLE SET IMAGE = ' "+ m_BarrImg + " ' WHERE CUSTOMERID = (whatever)
I have to make a SQLDBType.Image object. like this...
SqlConnection SqlCon = new SqlConnection(C onnectionStr);
string sql = "UPDATE CUSTOMER SET IMAGE = (@ImagPar)";
SqlCommand cmd = new SqlCommand();
SqlParameter sp = new SqlParameter("@ ImagPar",SqlDbT ype.Image);
sp.Value = m_barrImg;
SqlCmd.Paramete rs.Add(sp);
SqlCmd.CommandT ext = sql;
SqlCmd.CommandT ype = CommandType.Tex t;
SqlCmd.Connecti on = con;
//open connection
con.Open();
//execute the sql command
cmd.ExecuteNonQ uery();
con.Close();
etc...
I cant believe I searched for so long only to find the answer minutes after
I finally decided to ask. O well. thanks.
"Arne Vajhøj" wrote:
Rogelio wrote:
I'm having the wierdest problem. I'm trying to save images into a SQL 2005
database. the field is just called "IMAGES" and hte data type is "image".
here is my code to save
//the following code pulls it back out
//first get the byte array back from SQL using this method.
Byte[] barrImg = DBAccess.getima ge(CustomerID);
my proble is that when I get it BACK, the byte array size is only 13! when I
put it in, it's much larger than that.
why is it always 13 ? what am I doing wrong? the methods for update and
select are basic UPDATE TABLE SET IMAGE = ' m_BarrImg ' WHERE CUSTOMERID =
(whatever) , and the SELECT is the same simplicity SELECT IMAGE WHERE
CUSTOMERID = (whatever).
How does the code in DBAccess.getima ge look like ?
Arne This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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