c# : Insert .rpt file into database.


I need to add a crystal report file to a database;
it could be Sql Server/Oracle.
I have the following code;
What am I doing wrong?

I am just trying this for the SQL server 2005 database;

string sFilePath = "C\\test.rpt";

//byte[] RptData = GetRPTData(sFullReportPath);
FileStream fs = new FileStream(sFilePath, FileMode.Open, FileAccess.Read);
BinaryReader br = new BinaryReader(fs);
byte[] FileData = br.ReadBytes((int)fs.Length);
SqlCommand cmd = new SqlCommand("INSERT into Tab1 (Creator,Contents ) values(?,?)",myConnection);
cmd.Parameters.AddWithValue("Creator", "Tom");            
 SqlParameter blob = new SqlParameter();
   // blob.DbType = DbType.Byte;
 blob.SqlDbType = SqlDbType.VarBinary;


 int i =  cmd.ExecuteNonQuery();

I get an error for cmd.Parameters.Add(RptData);

An unhandled exception of type 'System.InvalidCastException' occurred in System.Data.dll

Additional information: The SqlParameterCollection only accepts non-null SqlParameter type objects, not Byte[] objects.
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Should this
string sFilePath = "C\\test.rpt";


string sFilePath = "C:\\test.rpt";


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