Recover Image From SQL Server CE Database

Hello,

Im using the same DB used in northwindoledb example, i need a similar app but in C#, not C++, so i use this DB and make a form for Pocket PC 2003 SE Emulator in Vista (device application) with visual studio 2005, i use a function to recover the image and display in a PictureBox but when this image create a BitMap give me an error "Value does not fall within the expected range.", i seek a lot in internet and don't find a solution, the function is:

public static Image Bytes2Image(byte[] bytes)

{

if (bytes == null) return null;

MemoryStream ms = new MemoryStream(bytes,0,bytes.Length );

Bitmap bm = null;

ms.Read(bytes, 0, bytes.Length);

bm = new Bitmap(ms);

return bm;

}

If someone can help me i will appreciatte

How about:

Code Snippet

public System.Drawing.Image BytesToImage(byte[] bytes)

{

if (bytes == null) return null;

System.IO.MemoryStream ms = new System.IO.MemoryStream(bytes);

return System.Drawing.Image.FromStream(ms);

}

|||

Erik,

System.Drawing.Image.FromStream(ms);

Don't exist in Compact Framework, all post suggest the use of new Bitmap(ms) instead, but this code give the error... Other user have similar error but cannot find the solution, the C++ version of the program work ok in the emulator, but in C# don't work (i'm using different aproach, i don't understand C++), some have a similar program in C# than manipulate images from SQL 2005 CE for Pocket PC?

Recover Image From SQL Server CE Database

Hello,

Im using the same DB used in northwindoledb example, i need a similar app but in C#, not C++, so i use this DB and make a form for Pocket PC 2003 SE Emulator in Vista (device application) with visual studio 2005, i use a function to recover the image and display in a PictureBox but when this image create a BitMap give me an error "Value does not fall within the expected range.", i seek a lot in internet and don't find a solution, the function is:

public static Image Bytes2Image(byte[] bytes)

{

if (bytes == null) return null;

MemoryStream ms = new MemoryStream(bytes,0,bytes.Length );

Bitmap bm = null;

ms.Read(bytes, 0, bytes.Length);

bm = new Bitmap(ms);

return bm;

}

If someone can help me i will appreciatte

How about:

Code Snippet

public System.Drawing.Image BytesToImage(byte[] bytes)

{

if (bytes == null) return null;

System.IO.MemoryStream ms = new System.IO.MemoryStream(bytes);

return System.Drawing.Image.FromStream(ms);

}

|||

Erik,

System.Drawing.Image.FromStream(ms);

Don't exist in Compact Framework, all post suggest the use of new Bitmap(ms) instead, but this code give the error... Other user have similar error but cannot find the solution, the C++ version of the program work ok in the emulator, but in C# don't work (i'm using different aproach, i don't understand C++), some have a similar program in C# than manipulate images from SQL 2005 CE for Pocket PC?

RecordCount -1

Hello,
I am using the function below to get some values form database.
However for RecordCount it always returns -1.
Any clues hot to fix it?
Thx
YuriW
Function RunSQL (sConnection_String, sSQL_QUERY)
Dim db_object
Dim sSQL_string
'connection_string = "DSN=Magnetic;UID=laurel;PWD=uklever"
sSQL_string = sSQL_QUERY
' Create the conection object.
Set db_object = CreateObject("ADODB.Connection")
' or use this method if a DSN entry was created.
db_object.Open(sConnection_String)
' Get the recordset returned from a select query.
Set recordset = db_object.Execute(sSQL_string)
' Display the results of the query.
sOut = recordset.RecordCount
RunSQL = sOut
' Close the database connection.
db_object.Close
Set db_object = Nothing
End Function
http://www.aspfaq.com/2193
http://www.aspfaq.com/
(Reverse address to reply.)
"Yuri Weinstein (HotMail)" <yuriw_NOSPAM@.hotmail.com> wrote in message
news:7Mnxc.68469$yx3.34214@.newssvr29.news.prodigy. com...
Hello,
I am using the function below to get some values form database.
However for RecordCount it always returns -1.
Any clues hot to fix it?
Thx
YuriW
Function RunSQL (sConnection_String, sSQL_QUERY)
Dim db_object
Dim sSQL_string
'connection_string = "DSN=Magnetic;UID=laurel;PWD=uklever"
sSQL_string = sSQL_QUERY
' Create the conection object.
Set db_object = CreateObject("ADODB.Connection")
' or use this method if a DSN entry was created.
db_object.Open(sConnection_String)
' Get the recordset returned from a select query.
Set recordset = db_object.Execute(sSQL_string)
' Display the results of the query.
sOut = recordset.RecordCount
RunSQL = sOut
' Close the database connection.
db_object.Close
Set db_object = Nothing
End Function
|||Thanks you. I am still not clear how to change the code in order to fix it?
"Aaron [SQL Server MVP]" <ten.xoc@.dnartreb.noraa> wrote in message
news:eyU6tjYTEHA.3580@.TK2MSFTNGP09.phx.gbl...
> http://www.aspfaq.com/2193
> --
> http://www.aspfaq.com/
> (Reverse address to reply.)
>
>
> "Yuri Weinstein (HotMail)" <yuriw_NOSPAM@.hotmail.com> wrote in message
> news:7Mnxc.68469$yx3.34214@.newssvr29.news.prodigy. com...
> Hello,
> I am using the function below to get some values form database.
> However for RecordCount it always returns -1.
> Any clues hot to fix it?
> Thx
> YuriW
> Function RunSQL (sConnection_String, sSQL_QUERY)
> Dim db_object
> Dim sSQL_string
> 'connection_string = "DSN=Magnetic;UID=laurel;PWD=uklever"
> sSQL_string = sSQL_QUERY
> ' Create the conection object.
> Set db_object = CreateObject("ADODB.Connection")
> ' or use this method if a DSN entry was created.
> db_object.Open(sConnection_String)
> ' Get the recordset returned from a select query.
> Set recordset = db_object.Execute(sSQL_string)
> ' Display the results of the query.
> sOut = recordset.RecordCount
> RunSQL = sOut
> ' Close the database connection.
> db_object.Close
> Set db_object = Nothing
> End Function
>
|||Maybe you need to look at the article again?
http://www.aspfaq.com/
(Reverse address to reply.)
"Yuri Weinstein (HotMail)" <yuriw_NOSPAM@.hotmail.com> wrote in message
news:dnoxc.68491$iR3.59055@.newssvr29.news.prodigy. com...
> Thanks you. I am still not clear how to change the code in order to fix
it?
>
> "Aaron [SQL Server MVP]" <ten.xoc@.dnartreb.noraa> wrote in message
> news:eyU6tjYTEHA.3580@.TK2MSFTNGP09.phx.gbl...
>
|||Recordcount is not supported with the default forward-only cursor. You can try to set the type of cursor before you excute your SQL code.
"Yuri Weinstein (HotMail)" <yuriw_NOSPAM@.hotmail.com> wrote in message news:7Mnxc.68469$yx3.34214@.newssvr29.news.prodigy. com...
Hello,
I am using the function below to get some values form database.
However for RecordCount it always returns -1.
Any clues hot to fix it?
Thx
YuriW
Function RunSQL (sConnection_String, sSQL_QUERY)
Dim db_object
Dim sSQL_string
'connection_string = "DSN=Magnetic;UID=laurel;PWD=uklever"
sSQL_string = sSQL_QUERY
' Create the conection object.
Set db_object = CreateObject("ADODB.Connection")
' or use this method if a DSN entry was created.
db_object.Open(sConnection_String)
' Get the recordset returned from a select query.
Set recordset = db_object.Execute(sSQL_string)
' Display the results of the query.
sOut = recordset.RecordCount
RunSQL = sOut
' Close the database connection.
db_object.Close
Set db_object = Nothing
End Function
|||Got it, thx!
"Aaron [SQL Server MVP]" <ten.xoc@.dnartreb.noraa> wrote in message
news:eyU6tjYTEHA.3580@.TK2MSFTNGP09.phx.gbl...
> http://www.aspfaq.com/2193
> --
> http://www.aspfaq.com/
> (Reverse address to reply.)
>
>
> "Yuri Weinstein (HotMail)" <yuriw_NOSPAM@.hotmail.com> wrote in message
> news:7Mnxc.68469$yx3.34214@.newssvr29.news.prodigy. com...
> Hello,
> I am using the function below to get some values form database.
> However for RecordCount it always returns -1.
> Any clues hot to fix it?
> Thx
> YuriW
> Function RunSQL (sConnection_String, sSQL_QUERY)
> Dim db_object
> Dim sSQL_string
> 'connection_string = "DSN=Magnetic;UID=laurel;PWD=uklever"
> sSQL_string = sSQL_QUERY
> ' Create the conection object.
> Set db_object = CreateObject("ADODB.Connection")
> ' or use this method if a DSN entry was created.
> db_object.Open(sConnection_String)
> ' Get the recordset returned from a select query.
> Set recordset = db_object.Execute(sSQL_string)
> ' Display the results of the query.
> sOut = recordset.RecordCount
> RunSQL = sOut
> ' Close the database connection.
> db_object.Close
> Set db_object = Nothing
> End Function
>
|||In "Display the results of the query" you should iterate through recordset
with MoveFirst/MoveNext. Add counter into this cycle
dim counter
counter = 0
rs.MoveFirst
while not rs.EOF
... display record
counter = counter + 1
rs.MoveNext
wend
'here counter contains number of records
//--
Regards,
Vassiliev V. V.
http://www-sharp.com -
Scripting/HTA/.Net Framework IDE
"Yuri Weinstein (HotMail)" <yuriw_NOSPAM@.hotmail.com> ??/?? ?
?? ??: news:7Mnxc.68469$yx3.34214@.newssvr29.news.prodigy. com...
Hello,
I am using the function below to get some values form database.
However for RecordCount it always returns -1.
Any clues hot to fix it?
Thx
YuriW
Function RunSQL (sConnection_String, sSQL_QUERY)
Dim db_object
Dim sSQL_string
'connection_string = "DSN=Magnetic;UID=laurel;PWD=uklever"
sSQL_string = sSQL_QUERY
' Create the conection object.
Set db_object = CreateObject("ADODB.Connection")
' or use this method if a DSN entry was created.
db_object.Open(sConnection_String)
' Get the recordset returned from a select query.
Set recordset = db_object.Execute(sSQL_string)
' Display the results of the query.
sOut = recordset.RecordCount
RunSQL = sOut
' Close the database connection.
db_object.Close
Set db_object = Nothing
End Function