/// <summary>
/// Updates a Course Document record in the EJS
/// </summary>
internal static void UpdateCourseDocument(SqlConnection dBconnection,
ejsSessionToken Token, ejsCourseDocument document)
{
SqlCommand command = new SqlCommand();
SqlDataReader reader = null;
command.CommandTimeout = 60;
try
{
command.Connection = dBconnection;
command.CommandType = System.Data.CommandType.StoredProcedure;
command.CommandText = "UpdateCourseDocument";
command.Parameters.Add("UserId", SqlDbType.UniqueIdentifier).Value = Token.UserId;
command.Parameters.Add("Title", System.Data.SqlDbType.NVarChar, 150).Value = document.Name;
command.Parameters.Add("Description", System.Data.SqlDbType.NVarChar, 500).Value = document.Description;
command.Parameters.Add("DocumentId", System.Data.SqlDbType.UniqueIdentifier).Value = document.DocumentId;
command.Parameters.Add("IsAvailable", System.Data.SqlDbType.Bit).Value = document.IsAvailable;
command.Parameters.Add("CourseId", SqlDbType.Int).Value = document.CourseId;
command.ExecuteNonQuery();
}
finally
{
command.Dispose();
if (reader != null)
{
reader.Close();
reader.Dispose();
}
}
}
/// <summary>
/// Deletes a Course Document from the EJS
/// </summary>
internal static int DeleteCourseDocument(SqlConnection dBconnection,
ejsSessionToken Token, ejsCourseDocument document)
{
SqlCommand command = new SqlCommand();
SqlDataReader reader = null;
command.CommandTimeout = 60;
try
{
command.Connection = dBconnection;
command.CommandType = System.Data.CommandType.StoredProcedure;
command.CommandText = "DeleteCourseDocument";
command.Parameters.Add("UserId", SqlDbType.UniqueIdentifier).Value = Token.UserId;
command.Parameters.Add("DocumentId", SqlDbType.UniqueIdentifier).Value = document.DocumentId;
SqlParameter returnValue = new SqlParameter("@RETURN_VALUE", SqlDbType.Int);
returnValue.Direction = ParameterDirection.ReturnValue;
command.Parameters.Add(returnValue);
command.ExecuteNonQuery();
int resultCode = (int)returnValue.Value;
return(resultCode);
}
finally
{
command.Dispose();
if (reader != null)
{
reader.Close();
reader.Dispose();
}
}
}
/// <summary>
/// Download a copy of a document stored in a course in the database.
/// </summary>
internal static byte[] GetCourseDocument(SqlConnection dBconnection,
ejsSessionToken sessionToken, ejsCourseDocument document)
{
SqlCommand command = null;
SqlDataReader reader = null;
try
{
byte[] result = new byte[document.ByteSize];
int bufferSize = (int)document.ByteSize;
byte[] outbyte = new byte[bufferSize];
MemoryStream ms = new MemoryStream(bufferSize);
BinaryWriter bw = new BinaryWriter(ms);
long startIndex = 0;
long retval;
command = new SqlCommand("SELECT Data FROM CourseDocuments WHERE DocumentId = @Id", dBconnection);
command.Parameters.Add("@Id", SqlDbType.UniqueIdentifier).Value = document.DocumentId;
command.CommandTimeout = 60;
reader = command.ExecuteReader(CommandBehavior.SequentialAccess);
while (reader.Read())
{
retval = reader.GetBytes(0, startIndex, outbyte, 0, bufferSize);
while (retval == bufferSize)
{
bw.Write(outbyte);
bw.Flush();
startIndex += bufferSize;
retval = reader.GetBytes(0, startIndex, outbyte, 0, bufferSize);
}
bw.Write(outbyte, 0, (int)retval);
bw.Flush();
bw.Close();
ms.Close();
ms.Dispose();
}
result = ms.GetBuffer();
return(result);
}
finally
{
command.Dispose();
if (reader != null)
{
reader.Close();
reader.Dispose();
}
}
}
internal static void GetAllCourseDocuments(SqlConnection dBconnection,
ejsSessionToken sessionToken, bool includeNotAvailable, ref List <ejsCourseDocument> result)
{
SqlCommand command = new SqlCommand();
SqlDataReader reader = null;
command.CommandTimeout = 60;
try
{
command.Connection = dBconnection;
command.CommandType = System.Data.CommandType.StoredProcedure;
command.CommandText = "GetAllCourseDocuments";
command.Parameters.Add("UserId", SqlDbType.UniqueIdentifier).Value = sessionToken.UserId;
command.Parameters.Add("IncludeNotAvailable", SqlDbType.Bit).Value = includeNotAvailable;
reader = command.ExecuteReader();
if (reader.HasRows)
{
while (reader.Read())
{
ejsCourseDocument doc = new ejsCourseDocument();
doc.Id = reader.GetInt32(0);
doc.Name = reader.GetString(1);
doc.Description = reader.GetString(2);
doc.DocumentId = reader.GetGuid(3);
doc.CreationDate = reader.GetDateTime(4);
doc.IsAvailable = reader.GetBoolean(5);
doc.CourseId = reader.GetInt32(6);
result.Add(doc);
}
}
}
finally
{
command.Dispose();
if (reader != null)
{
reader.Close();
reader.Dispose();
}
}
}
/// <summary>
/// Upload a document to a course in the E J S.
/// </summary>
internal static void RegisterDocumentToCourse
(SqlConnection dBconnection, ejsSessionToken sessionToken,
ejsCourseDocument document, int courseId, byte[] documentData)
{
SqlCommand command = new SqlCommand();
SqlDataReader reader = null;
command.CommandTimeout = 60;
try
{
command.Connection = dBconnection;
command.CommandType = System.Data.CommandType.StoredProcedure;
command.CommandText = "AddDocumentToCourse";
command.Parameters.Add("Title", System.Data.SqlDbType.NVarChar, 150).Value = document.Name;
command.Parameters.Add("Description", System.Data.SqlDbType.NVarChar, 500).Value = document.Description;
command.Parameters.Add("DocumentId", System.Data.SqlDbType.UniqueIdentifier).Value = document.DocumentId;
command.Parameters.Add("CreationDate", System.Data.SqlDbType.DateTime).Value = document.CreationDate;
command.Parameters.Add("IsAvailable", System.Data.SqlDbType.Bit).Value = document.IsAvailable;
command.Parameters.Add("CourseId", SqlDbType.Int).Value = courseId;
command.Parameters.Add("Data", System.Data.SqlDbType.VarBinary, (int)documentData.Length).Value = documentData;
command.Parameters.Add("DataSize", System.Data.SqlDbType.BigInt).Value = documentData.Length;
command.ExecuteNonQuery();
}
finally
{
command.Dispose();
if (reader != null)
{
reader.Close();
reader.Dispose();
}
}
}
