/// <summary>
/// 拼接 and 条件语句
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="first"></param>
/// <param name="second"></param>
/// <returns></returns>
public static Expression <Func <T, bool> > And <T>(this Expression <Func <T, bool> > first, Expression <Func <T, bool> > second)
{
if (first == null)
{
return(second);
}
if (second == null)
{
return(first);
}
return(ParameterRebinder.Compose(first, second, Expression.And));
}
/// <summary>
/// Or 条件语句
/// </summary>
/// <typeparam name="T">实体类型</typeparam>
/// <param name="first">条件1</param>
/// <param name="second">条件2</param>
/// <returns></returns>
public static Expression <Func <T, bool> > Or <T>(this Expression <Func <T, bool> > first,
Expression <Func <T, bool> > second)
{
return(ParameterRebinder.Compose(first, second, Expression.Or));
}