public static LambdaExpression OrElse(this LambdaExpression first, LambdaExpression second)
{
if (first == null)
{
throw new ArgumentNullException("first");
}
return(first.Compose(second, Expression.OrElse));
}
/// <summary>
/// 表达式的并且运算
/// </summary>
/// <param name="first"></param>
/// <param name="second"></param>
/// <returns></returns>
public static LambdaExpression AndAlso(this LambdaExpression first, LambdaExpression second)
{
if (first == null)
{
return(second);
}
if (second == null)
{
return(first);
}
return(first.Compose(second, Expression.AndAlso));
}
/// <summary>
/// 表达式的或运算
/// </summary>
/// <param name="first"></param>
/// <param name="second"></param>
/// <returns></returns>
public static LambdaExpression OrElse <TEntity>(this LambdaExpression first, LambdaExpression second)
{
if (first == null)
{
return(second);
}
if (second == null)
{
return(first);
}
return(first.Compose(second, Expression.OrElse));
}