public static DBCommand Build(DBTable table, string procName, DBCommandTypes type, IEnumerable <DBColumn> columns = null)
{
if (table.PrimaryKey == null && (type == DBCommandTypes.Delete || type == DBCommandTypes.Update))
{
return(null);
}
if (columns == null)
{
columns = table.Columns;
}
string commandText = procName;
string prefix = table.Schema.System.ParameterPrefix;
CommandType ctype = CommandType.StoredProcedure;
if (string.IsNullOrEmpty(procName))
{
ctype = CommandType.Text;
commandText = table.Schema.System.FormatCommand(table, type, null, columns);
}
var command = new DBCommand(commandText, ctype);
if (type == DBCommandTypes.Delete)
{
command.Parameters.Add(new DBCommandParameter(table.PrimaryKey, prefix)
{
Direction = ParameterDirection.Input
});
}
else
{
DBCommandParameter paramId = null;
if (table.PrimaryKey != null)
{
paramId = new DBCommandParameter(table.PrimaryKey, prefix)
{
Direction = ParameterDirection.Input
};
if (type == DBCommandTypes.Insert || type == DBCommandTypes.InsertSequence)
{
command.Parameters.Add(paramId);
}
//else if (type == DBCommandTypes.InsertSequence)
//{
//command.Parameters.Add(paramId);
//paramId.Direction = ParameterDirection.InputOutput;
//}
}
foreach (var column in columns)
{
if (column.ColumnType == DBColumnTypes.Default && column != table.PrimaryKey)
{
var prm = new DBCommandParameter(column, prefix);
if (ctype == CommandType.Text)
{
prm.Direction = ParameterDirection.Input;
}
command.Parameters.Add(prm);
}
}
if (paramId != null && type == DBCommandTypes.Update)
{
command.Parameters.Add(paramId);
}
}
return(command);
}
public List <T> Load(IDbCommand command, DBLoadParam param = DBLoadParam.None, DBTransaction baseTransaction = null)
{
var list = new List <T>();
var transaction = baseTransaction ?? new DBTransaction(Connection, null, true);
try
{
transaction.AddCommand(command);
if ((param & DBLoadParam.Reference) == DBLoadParam.Reference)
{
LoadReferenceBlock(command, transaction);
}
if ((param & DBLoadParam.Referencing) == DBLoadParam.Referencing)
{
LoadReferencingBlock(command, transaction);
}
if (transaction.Canceled)
{
return(list);
}
var whereInd = command.CommandText.IndexOf("where ", StringComparison.OrdinalIgnoreCase);
var arg = new DBLoadProgressEventArgs(transaction.View, 0, 0, null);
if (transaction.View != null && transaction.View.Table == this && transaction.View.IsStatic)
{
transaction.View.Clear();
}
if ((transaction.ReaderParam & DBLoadParam.GetCount) == DBLoadParam.GetCount)
{
string w = whereInd == -1 ? string.Empty : command.CommandText.Substring(whereInd);
var val = transaction.ExecuteQuery(transaction.AddCommand(DBCommand.CloneCommand(command, BuildQuery(w, "a", null, "count(*)"))), DBExecuteType.Scalar);
arg.TotalCount = val is Exception ? -1 : int.Parse(val.ToString());
if (arg.TotalCount < 0 || arg.TotalCount == 0)
{
return(list);
}
if (items.Capacity < arg.TotalCount)
{
items.Capacity = arg.TotalCount;
}
//arg.TotalCount = Rows._items.Capacity;
}
//var buffer = new List<T>(arg.TotalCount == 0 ? 1 : arg.TotalCount);
if (transaction.Canceled)
{
return(list);
}
using (transaction.Reader = transaction.ExecuteQuery(command, DBExecuteType.Reader) as IDataReader)
{
CheckColumns(transaction);
while (!transaction.Canceled && transaction.Reader.Read())
{
T row = null;
lock (Lock)
{
row = LoadFromReader(transaction);
if (!row.Attached && (transaction.ReaderParam & DBLoadParam.NoAttach) != DBLoadParam.NoAttach)
{
Add(row);
}
}
if (arg.TotalCount > 0)
{
arg.Current++;
arg.CurrentRow = row;
RaiseLoadProgress(arg);
}
list.Add(row);
if (transaction.View?.Table == this && transaction.View.IsStatic)
{
transaction.View.Add(row);
}
}
}
transaction.Reader = null;
//Check IsSynchronized
if (transaction.View?.Table == this)
{
transaction.View.IsSynchronized = true;
}
if (whereInd < 0)
{
IsSynchronized = true;
}
//return buffer;
}
finally
{
transaction.Reader = null;
RaiseLoadCompleate(transaction);
if (baseTransaction == null)
{
transaction.Dispose();
}
}
return(list);
}
