eaxing_back_africa_main/Service/Station/SwapOrderStepService.cs

using Entity.Api.Req;
using Entity.Api.Resp;
using Entity.DbModel.Station;
using HybirdFrameworkCore.Autofac.Attribute;
using HybirdFrameworkCore.Entity;
using Repository.Station;
using SqlSugar;
using System.Linq.Expressions;

namespace Service.Station;

[Scope("SingleInstance")]
public class SwapOrderStepService : BaseServices<SwapOrderStep>
{
    SwapOrderStepRepository _swapOrderStepRepository;
    public SwapOrderStepService(SwapOrderStepRepository dal)
    {
        _swapOrderStepRepository = dal;
        BaseDal = dal;
    }


    /// <summary>
    /// 根据条件查询换电步序信息分页
    /// </summary>
    /// <param name="swapOrderStep"></param>
    /// <returns></returns>
    public PageResult<SwapOrderStepResp> QueryEqmFaultInfo(QuerySwapOrderStepReq swapOrderStep)
    {
        
        //创建一个空的表达式树
        Expression<Func<SwapOrderStep, bool>> where = null;
        //// 定义参数表达式
        ParameterExpression parameter = Expression.Parameter(typeof(SwapOrderStep), "u");

        if (swapOrderStep.Id!=0)
        {
            Expression<Func<SwapOrderStep, bool>> condition1Expr = u => u.Id == swapOrderStep.Id;
            where = condition1Expr;
        }
        if (swapOrderStep.Step != 0)
        {
            Expression<Func<SwapOrderStep, bool>> condition2Expr = u => u.Step == swapOrderStep.Step;
            where = where == null ? condition2Expr : Expression.Lambda<Func<SwapOrderStep, bool>>(Expression.AndAlso(where.Body, condition2Expr.Body), parameter);
        }

        if (!string.IsNullOrEmpty(swapOrderStep.SwapOrderSn))
        {
            Expression<Func<SwapOrderStep, bool>> condition2Expr = u => u.SwapOrderSn == swapOrderStep.SwapOrderSn;
            where = where == null ? condition2Expr : Expression.Lambda<Func<SwapOrderStep, bool>>(Expression.AndAlso(where.Body, condition2Expr.Body), parameter);
        }
        // 构建查询条件
        if (!string.IsNullOrEmpty(swapOrderStep.StepName))
        {
            Expression<Func<SwapOrderStep, bool>> condition2Expr = u => u.StepName == swapOrderStep.StepName;
            where = where == null ? condition2Expr : Expression.Lambda<Func<SwapOrderStep, bool>>(Expression.AndAlso(where.Body, condition2Expr.Body), parameter);
        }
        //查询
        return PageResult<SwapOrderStepResp>.ConvertPage(_swapOrderStepRepository.QueryIPageByCause(swapOrderStep, where));


    }
}