34 lines
1.2 KiB
C#
34 lines
1.2 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Linq.Expressions;
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using System.Text;
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namespace CC.Yi.Common
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{
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public static class LinqHelper
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{
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//T是列表类型，S是排序的属性
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public static IQueryable GetPageEntities<T,S>(IQueryable<T> myData, int pageSize, int pageIndex, out int total, Expression<Func<T, bool>> whereLambda=null, Expression<Func<T, S>> orderByLambda=null, bool isAsc=false)
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{
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total = myData.Where(whereLambda).Count();
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if (isAsc)
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{
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var pageData = myData.Where(whereLambda)
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.OrderBy<T,S>(orderByLambda)
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.Skip(pageSize * (pageIndex - 1))
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.Take(pageSize).AsQueryable();
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return pageData;
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}
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else
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{
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var pageData = myData.Where(whereLambda)
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.OrderByDescending<T, S>(orderByLambda)
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.Skip(pageSize * (pageIndex - 1))
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.Take(pageSize).AsQueryable();
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return pageData;
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}
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}
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}
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}
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