SQL Server, SQL Server Express, and SqlDataSource Control

Re: My byte[] becomes empty when inserted to database

Naom — Sun, 05 Jul 2009 18:09:04 GMT

In your original code

cmd.Parameters["@ bindata"].Value = bindata; // bindata is a byte[] // remove a space here

Re: My byte[] becomes empty when inserted to database

RickNZ — Sun, 05 Jul 2009 17:23:09 GMT

Try removing the space between the @ and bindata, on the line where you set its value.

Re: My byte[] becomes empty when inserted to database

Zcumbag — Sun, 05 Jul 2009 11:13:45 GMT

The column is a varbinary(8000) in my sql server 2008.

My bindata[] gets its value like this:

BinaryFormatter bf = new BinaryFormatter();

MemoryStream s = new MemoryStream();

bf.Serialize(s, this);

BinaryFormatter bf = new BinaryFormatter();
MemoryStream s = new MemoryStream();
bf.Serialize(s, this); // "this" is a class 

bindata = s.ToArray();
// at this row I can see that the bindata contains lots of info

Re: My byte[] becomes empty when inserted to database

Segundo — Sun, 05 Jul 2009 00:10:05 GMT

Hi,

Please

1.- which's the data type of that column in your database table?

2.- which's the data type you use to save that data in your code-beside?

Any doubt, post your comment.

My byte[] becomes empty when inserted to database

Zcumbag — Sat, 04 Jul 2009 22:38:11 GMT

Hello.

I have a procedure that (is supposed to) instert a byte[] into a varbinary-field in sql server.

Here's the code:

SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["MyConnectionString"].ConnectionString);
            SqlCommand cmd = new SqlCommand("SP_InsertStuff", conn);
            cmd.CommandType = CommandType.StoredProcedure;

            cmd.Parameters.Add("@Id", SqlDbType.UniqueIdentifier);
            cmd.Parameters["@Id"].Value = pId; // pId is a Guid

            cmd.Parameters.Add("@datetime", SqlDbType.DateTime);
            cmd.Parameters["@datetime"].Value = datetime;

            cmd.Parameters.Add("@bindata", SqlDbType.VarBinary);
            cmd.Parameters["@ bindata"].Value = bindata; // bindata is a byte[]

            try
            {
                conn.Open();
                cmd.ExecuteNonQuery();
                return true;
            }
            catch
            {
                return false;
            }
            finally
            {
                conn.Close();
            }

When I put a breakpoint in the code I can clearly see that the bindata contains lots of information. Everything seems to be working nice. Except, when I retrieve the data, or just look in my table, the bindata-column is empty (or poosibly just 1 byte size).

Why is this? Am I doing something wrong?