protected override SqlPack Select(NewExpression expression, SqlPack sqlPack)
{
foreach (Expression item in expression.Arguments)
{
Expression2SqlProvider.Select(item, sqlPack);
}
return(sqlPack);
}
public Expression2SqlCore <T> Select <T2>(Expression <Func <T, T2, object> > expression = null)
{
string sql = SelectParser(typeof(T), typeof(T2));
if (expression == null)
{
this._sqlPack.Sql.AppendFormat(sql, "*");
}
else
{
Expression2SqlProvider.Select(expression.Body, this._sqlPack);
this._sqlPack.Sql.AppendFormat(sql, this._sqlPack.SelectFieldsStr);
}
return(this);
}
public Expression2SqlCore <T> Select <T2, T3, T4, T5, T6, T7, T8, T9, T10>(Expression <Func <T, T2, T3, T4, T5, T6, T7, T8, T9, T10, object> > expression = null)
{
string sql = SelectParser(typeof(T), typeof(T2), typeof(T3), typeof(T4), typeof(T5), typeof(T6), typeof(T7), typeof(T8), typeof(T9), typeof(T10));
if (expression == null)
{
this._sqlPack.Sql.AppendFormat(sql, "*");
}
else
{
Expression2SqlProvider.Select(expression.Body, this._sqlPack);
this._sqlPack.Sql.AppendFormat(sql, this._sqlPack.SelectFieldsStr);
}
return(this);
}
/// <summary>
/// Select 解析
/// </summary>
/// <param name="expression"></param>
/// <returns></returns>
public Expression2SqlCore <T> Select(Expression <Func <T, object> > expression = null)
{
///获得sql
string sql = SelectParser(typeof(T));
///判断查询所有字段
if (expression == null)
{
this._sqlPack.Sql.AppendFormat(sql, "*");
}
else
{
///解析要查询的字段
Expression2SqlProvider.Select(expression.Body, this._sqlPack);
this._sqlPack.Sql.AppendFormat(sql, this._sqlPack.SelectFieldsStr);
}
return(this);
}
protected override SqlPack Select(UnaryExpression expression, SqlPack sqlPack)
{
////获取一元运算的操作数。
Expression2SqlProvider.Select(expression.Operand, sqlPack);
return(sqlPack);
}
