LambdaToSql/LambdaParser/LambdaRouter.cs

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using System;
using System.Collections;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Linq;
using System.Linq.Expressions;
using System.Text;
using System.Text.RegularExpressions;

namespace LambdaToSql
{
    internal class LambdaRouter
    {
        /// <summary>
        /// 返回结果
        /// </summary>
        public string Result { get; set; }

        /// <summary>
        /// sql参数集合
        /// </summary>
        public List<LambdaToSql.EntityModel.DataParameter> Parameters { get; set; }

        /// <summary>
        /// 带sql参数的构造函数
        /// </summary>
        /// <param name="parameters"></param>
        public LambdaRouter(List<LambdaToSql.EntityModel.DataParameter> parameters = null)
        {
            this.Parameters = parameters;
            if (this.Parameters == null)
            {
                this.Parameters = new List<LambdaToSql.EntityModel.DataParameter>();
            }
        }

        /// <summary>
        /// 解析表达式
        /// </summary>
        /// <param name="exp"></param>
        /// <returns></returns>
        public string ExpressionRouter(Expression exp)
        {
            var obj = new LambdaParser.ParserBuilder()
            {
                ArgumentsStartIndex = this.Parameters.Count
            };
            obj.InitBuild(exp);

            this.Result = obj.Result;
            foreach (DictionaryEntry item in obj.Arguments)
            {
                if (item.Value == null)
                {
                    var rex = "\\((.*?)" + item.Key.ToString() + "\\)";
                    var arr = Regex.Matches(this.Result, rex);
                    foreach (var _temp in arr)
                    {
                        var name = "";
                        var value = "";