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20220330_Vote/Ewide.Core/Extension/PageExtensions.cs
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227
20220330_Vote/Ewide.Core/Extension/PageExtensions.cs
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using Dapper;
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using Ewide.Core.Extension.DataFilter.WebPage;
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using Furion.DatabaseAccessor;
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using Furion.LinqBuilder;
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using Mapster;
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using System;
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using System.Collections.Generic;
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using System.Data;
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using System.Linq;
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using System.Linq.Dynamic.Core;
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using System.Linq.Expressions;
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using System.Reflection;
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using System.Threading.Tasks;
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namespace Ewide.Core.Extension
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{
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public static class PageExtensions
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{
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private static string OrderBuilder(PageInputBase pageInput)
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{
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var orderStr = string.Empty;
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if (!string.IsNullOrEmpty(pageInput.SortField))
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{
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orderStr = $"{pageInput.SortField} {(pageInput.SortOrder == pageInput.DescStr ? "Desc" : "Asc")}";
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}
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return orderStr;
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}
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private static string OrderBuilder<T>(PageInputBase pageInput, bool descSort = false)
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{
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var type = typeof(T);
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var hasId = type.GetProperty("Id") != null;
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var hasSort = type.GetProperty("Sort") != null;
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var hasCreatedTime = type.GetProperty("CreatedTime") != null;
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var defaultField = hasSort ? "Sort" : hasCreatedTime ? "CreatedTime" : hasId ? "Id" : "";
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// 排序优先级 创建时间->序号->ID
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var orderStr = string.IsNullOrEmpty(defaultField) ? "" : defaultField + (descSort ? " Desc" : " Asc");
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// 排序是否可用-排序字段和排序顺序都为非空才启用排序
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if (!string.IsNullOrEmpty(pageInput.SortField))
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{
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orderStr = OrderBuilder(pageInput);
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}
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return orderStr;
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}
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//public static IQueryable<T> GetFilterInfo<T>(this IQueryable<T> source, PageInputBase input, IEnumerable<string> equalsFields = null, IEnumerable<string> likeFields = null, IEnumerable<string> dateTimeRangeFields = null, IEnumerable<string> otherRangeFields = null) where T : new()
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//{
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// var _searchStr = input._Search;
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// var searchInfoObj = Newtonsoft.Json.JsonConvert.DeserializeObject<DataFilter.Entity.SearchInfo[]>(_searchStr);
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// foreach(var elem in searchInfoObj)
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// {
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// ParameterExpression param = Expression.Parameter(typeof(T), "p");
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// var field = typeof(T).GetProperty(elem.Field, BindingFlags.Public | BindingFlags.Instance | BindingFlags.IgnoreCase);
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// Expression left = Expression.Property(param, field);
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// Expression<Func<T, bool>> finalExpression = null;
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// foreach(var value in elem.Value)
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// {
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// Expression right = Expression.Constant(Convert.ChangeType(value, Nullable.GetUnderlyingType(left.Type) ?? left.Type));
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// right = Expression.Convert(right, left.Type);
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// Expression filter = null;
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// filter = filter.Filter(left, right, elem.QueryType);
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// if (finalExpression == null)
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// {
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// finalExpression = Expression.Lambda<Func<T, bool>>(filter, param);
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// }
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// else
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// {
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// finalExpression = finalExpression.Or(Expression.Lambda<Func<T, bool>>(filter, param));
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// }
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// }
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// source.Where(finalExpression);
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// }
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// return source;
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//}
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private static Expression Filter(this Expression filter, Expression left, Expression right, Ewide.Core.QueryTypeEnum queryType)
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{
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switch (queryType)
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{
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//case "=":
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// filter = Expression.Equal(left, right);
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// break;
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//case "<>":
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//case "!=":
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// filter = Expression.NotEqual(left, right);
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// break;
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case QueryTypeEnum.GreaterThan:
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filter = Expression.GreaterThan(left, right);
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break;
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case QueryTypeEnum.GreaterThanOrEqual:
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filter = Expression.GreaterThanOrEqual(left, right);
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break;
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case QueryTypeEnum.LessThan:
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filter = Expression.LessThan(left, right);
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break;
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case QueryTypeEnum.LessThanOrEqual:
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filter = Expression.LessThanOrEqual(left, right);
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break;
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case QueryTypeEnum.Like:
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filter = Expression.Call(left, typeof(string).GetMethod("Contains"), right);
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break;
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//case "NOT LIKE":
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// filter = Expression.Not(Expression.Call(left, typeof(string).GetMethod("Contains"), right));
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// break;
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default:
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filter = Expression.Equal(left, right);
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break;
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}
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return filter;
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}
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public static Task<PagedList<T>> ToPageData<T>(this IQueryable<T> source, PageInputBase input) where T : new()
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{
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return source.OrderBy(OrderBuilder<T>(input)).ToPagedListAsync(input.PageIndex, input.PageSize);
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}
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public static Task<PagedList<O>> ToPageData<T, O>(this IQueryable<T> source, PageInputBase input) where O : new()
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{
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return source.OrderBy(OrderBuilder<T>(input)).Select(u => u.Adapt<O>()).ToPagedListAsync(input.PageIndex, input.PageSize);
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}
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public static Task<PagedList<O>> ToPageData<T, O>(this IQueryable<T> source, PageInputBase input, TypeAdapterConfig config) where O : new()
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{
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return source.OrderBy(OrderBuilder<T>(input)).Select(u => u.Adapt<O>(config)).ToPagedListAsync(input.PageIndex, input.PageSize);
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}
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#region DAPPER
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public async static Task<PagedList> QueryPageDataDynamic(this IDapperRepository source, string baseSql, PageInputBase input, object param = null, IEnumerable<string> filterFields = null, IDbTransaction transaction = null, int? commandTimeout = null, CommandType? commandType = null)
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{
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SearchJsonFitlerInfoGetService searchJsonFitlerInfoGetService = new SearchJsonFitlerInfoGetService(input, filterFields, param);
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var sql = searchJsonFitlerInfoGetService.GetWhereSql(baseSql);
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var sqlParam = searchJsonFitlerInfoGetService.sqlParameters;
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return await QueryPageData(source, sql, input, sqlParam, transaction, commandTimeout, commandType);
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}
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public async static Task<PagedList> QueryPageData(this IDapperRepository source, string sql, PageInputBase input, object param = null, IDbTransaction transaction = null, int? commandTimeout = null, CommandType? commandType = null)
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{
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var count = await source.PageTotalCount(
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sql,
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param: param,
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transaction: transaction,
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commandTimeout: commandTimeout,
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commandType: commandType
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);
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var data = await source.QueryAsync(
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PageSqlBuilder(sql, input),
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param: param,
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transaction: transaction,
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commandTimeout: commandTimeout,
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commandType: commandType
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);
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var page = new PagedList
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{
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PageIndex = input.PageIndex,
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PageSize = input.PageSize,
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Items = data,
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TotalCount = count,
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TotalPages = input.PageSize.Equals(0) ? 1 : (int)Math.Ceiling((decimal)count / (decimal)input.PageSize)
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};
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return page;
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}
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public async static Task<PagedList<T>> QueryPageData<T>(this IDapperRepository source, string sql, PageInputBase input, object param = null, IDbTransaction transaction = null, int? commandTimeout = null, CommandType? commandType = null) where T : new()
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{
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var count = await source.PageTotalCount(
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sql,
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param: param,
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transaction: transaction,
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commandTimeout: commandTimeout,
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commandType: commandType
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);
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var data = await source.QueryAsync<T>(
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PageSqlBuilder(sql, input),
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param: param,
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transaction: transaction,
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commandTimeout: commandTimeout,
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commandType: commandType
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);
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var page = new PagedList<T>
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{
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PageIndex = input.PageIndex,
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PageSize = input.PageSize,
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Items = data,
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TotalCount = count,
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TotalPages = input.PageSize.Equals(0) ? 1 : (int)Math.Ceiling((decimal)count / (decimal)input.PageSize)
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};
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return page;
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}
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private async static Task<int> PageTotalCount(this IDapperRepository source, string sql, object param = null, IDbTransaction transaction = null, int? commandTimeout = null, CommandType? commandType = null)
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{
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var countSql = String.Format("SELECT COUNT(0) FROM ({0}) T", sql);
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var countAsync = await source.QueryAsync<int>(
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countSql,
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param: param,
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transaction: transaction,
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commandTimeout: commandTimeout,
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commandType: commandType);
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var count = countAsync.SingleOrDefault();
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return count;
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}
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private static string PageSqlBuilder(string sql , PageInputBase input)
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{
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var sqlStrList = new List<string>();
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var orderStr = OrderBuilder(input);
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if (!string.IsNullOrEmpty(orderStr)) sqlStrList.Add(" ORDER BY " + orderStr);
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// input.PageSize = 0表示不分页
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if (input.PageSize != 0) sqlStrList.Add(" LIMIT " + ((input.PageIndex - 1) * input.PageSize).ToString() + "," + input.PageSize.ToString());
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sql += String.Join("", sqlStrList);
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return sql;
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}
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#endregion
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}
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}
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