public SQL Create(Expression <Func <T, bool> > Where, Analysis analysis)
{
var _SQL = new SQL();
//修正Where 表达式树结构
var _Table = Parser.GetTableInfo(typeof(T));
var _TableName = _Table.TableName;
if (Where != null && Where.Parameters[0].Name != _Table.TableName)
{
var _Set_Parameter = Expression.Parameter(typeof(T), _TableName);
Where = Expression.Lambda <Func <T, bool> >(Where.Body, _Set_Parameter);
}
_TableName = DbSettings.KeywordHandle(_TableName);
_SQL.Code.AppendFormat("DELETE FROM {0} WHERE 1=1 ", _TableName);
if (Where != null)
{
_SQL.IsAlias = false;
analysis.CreateWhere(Where, _SQL);
_SQL.Code.AppendFormat("AND {0}", _SQL.Code_Where);
}
_SQL.Code.Append(";");
return(_SQL);
}
public void Create(SQL _Sql, LambdaExpression _LambdaExpression, EJoinType _EJoinType, Analysis analysis)
{
if (_LambdaExpression.Body is BinaryExpression)
{
var body = (_LambdaExpression.Body as BinaryExpression);
var _Parameters = _LambdaExpression.Parameters;
var _Parameter = _Parameters[_Parameters.Count - 1];
var _Alias = DbSettings.KeywordHandle(_Parameter.Name);
var _TabName = DbSettings.KeywordHandle(_Parameter.Type.Name);
_Sql.Code_Join.AppendFormat(" {0} {1} AS {2} ON ", _EJoinType.ToString().Replace("_", " "), _TabName, _Alias);
var _New_Sql = new SQL();
_New_Sql.Parameter = _Sql.Parameter;
analysis.CreateWhere(_LambdaExpression, _New_Sql);
_Sql.Code_Join.Append(_New_Sql.Code_Where);
_Sql.Parameter = _New_Sql.Parameter;
_Sql.Alias[_Alias] = _TabName;
}
}
public SQL Create(MemberInitExpression _MemberInitExpression, Expression <Func <T, bool> > Where, Analysis analysis)
{
var _SQL = new SQL();
List <string> _Set = new List <string>();
//修正Where 表达式树结构
var _Table = Parser.GetTableInfo(typeof(T));
var _TableName = _Table.TableName;
if (Where != null && Where.Parameters[0].Name != _Table.TableName)
{
var _Set_Parameter = Expression.Parameter(typeof(T), _TableName);
Where = Expression.Lambda <Func <T, bool> >(Where.Body, _Set_Parameter);
}
_TableName = DbSettings.KeywordHandle(_TableName);
foreach (MemberAssignment item in _MemberInitExpression.Bindings)
{
//检测有无忽略字段
if (_Table.Fields.FirstOrDefault(w => w.IsIgnore && w.FieldName == item.Member.Name) != null)
{
continue;
}
var _Name = item.Member.Name;
if (_Table.KeyFieldName == _Name && _Table.KeyFieldInfo.IsIdentity)//如果主键自增
{
continue;
}
var _Count = _SQL.Parameter.Count;
var _Key = "@" + _Name + "_" + _Count;
_Set.Add(_Name + "=" + _Key);
var _Val = Parser.Eval(item.Expression);
_SQL.Parameter.Add(new DbParam()
{
ParameterName = _Key, Value = _Val
});
}
_SQL.Code.AppendFormat("UPDATE {0} SET {1} WHERE 1=1 ", _TableName, string.Join(",", _Set));
if (Where != null)
{
_SQL.IsAlias = false;
analysis.CreateWhere(Where, _SQL);
_SQL.Code.AppendFormat("AND {0}", _SQL.Code_Where);
}
_SQL.Code.Append(";");
return(_SQL);
}
