/// <summary> /// 创建小于等于运算表达式 /// </summary> /// <param name="left">左操作数</param> /// <param name="value">值</param> public static Expression LessEqual(this Expression left, object value) => left.LessEqual(Lambdas.Constant(left, value));
/// <summary>
/// 获取lambda表达式的值
/// </summary>
/// <typeparam name="T">对象类型</typeparam>
public static object Value <T>(this Expression <Func <T, bool> > expression)
{
return(Lambdas.GetValue(expression));
}
/// <summary> /// 创建大于运算表达式 /// </summary> /// <param name="left">左操作数</param> /// <param name="value">值</param> public static Expression Greater(this Expression left, object value) => left.Greater(Lambdas.Constant(left, value));
/// <summary>
/// 添加表达式
/// </summary>
/// <param name="property">属性表达式</param>
/// <param name="operator">运算符</param>
/// <param name="value">值</param>
public void Append <TProperty>(Expression <Func <TEntity, TProperty> > property, Operator @operator, object value)
{
_result = _result.And(_parameter.Property(Lambdas.GetMember(property)).Operation(@operator, value));
}