GetPictures

获取图片列表（进入相册管理的时候）

GetPictures
        public override ThreadSet GetPictures(GalleryThreadQuery query)
        {
            using( SqlConnection connection = GetSqlConnection() ) 
            {
                using(SqlCommand command = new SqlCommand(databaseOwner + ".cs_gallery_Threads_GetThreadSet", connection))
                {
                    command.CommandType = CommandType.StoredProcedure;

                    command.Parameters.Add("@SectionID", SqlDbType.Int).Value = query.SectionID;
                    command.Parameters.Add("@PageIndex", SqlDbType.Int, 4).Value = query.PageIndex;
                    command.Parameters.Add("@PageSize", SqlDbType.Int, 4).Value = query.PageSize;
                    command.Parameters.Add("@sqlPopulate", SqlDbType.NText).Value = SqlGenerator.BuildGalleryThreadQuery(query, databaseOwner);
                    command.Parameters.Add("@UserID", SqlDbType.Int).Value = query.UserID;
                    command.Parameters.Add("@IncludeCategories", SqlDbType.Bit).Value = query.IncludeCategories;
                    command.Parameters.Add("@TotalRecords", SqlDbType.Int).Direction = ParameterDirection.Output;
                    command.Parameters.Add(SettingsIDParameter());

                    ThreadSet ts = new ThreadSet();

                    // Execute the command
                    
                    //If we want to display the list of categories for the post, we will need to 
                    //use a dataset so we can join the child records
                    if(query.IncludeCategories)
                    {
                        DataSet ds = new DataSet();
                        SqlDataAdapter da = new SqlDataAdapter(command);

                        //wait as long as possible to open the conn
                        connection.Open();
                        da.Fill(ds);
                        connection.Close();

                        //keep a referece to the relation since it is used in the GetChildRows look up anyway
                        DataRelation relation = new DataRelation("Categories",ds.Tables[0].Columns["PostID"],ds.Tables[1].Columns["PostID"],false);
                        ds.Relations.Add(relation);
                        
                        DataRowCollection posts = ds.Tables[0].Rows;
                        foreach(DataRow dr in posts)
                            ts.Threads.Add(PopulatePictureFromIDataReader(dr, relation));
                        ds.Clear();
                        ds.Dispose();

                        ts.TotalRecords = (int) command.Parameters["@TotalRecords"].Value;
                    }
                    else
                    {
                        //No categories needed, so we can use a datareader.

                        connection.Open();
                        using(SqlDataReader dr = command.ExecuteReader(CommandBehavior.CloseConnection))
                        {
                        
                            while(dr.Read())
                                ts.Threads.Add(PopulatePictureFromIDataReader(dr));

                            dr.NextResult();
                            ts.TotalRecords = (int) command.Parameters["@TotalRecords"].Value;
                        }
                    }

                    return ts;

                }
            }
        }