30 lines
1.2 KiB
C#
30 lines
1.2 KiB
C#
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using System;
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using System.Linq;
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using System.Linq.Expressions;
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namespace gswi.Data
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{
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public static class LinqExtension
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{
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public static IQueryable<T> OrderByMember<T>(this IQueryable<T> q, string SortField)
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{
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var param = Expression.Parameter(typeof(T), "p");
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var prop = Expression.Property(param, SortField);
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var exp = Expression.Lambda(prop, param);
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Type[] types = new Type[] { q.ElementType, exp.Body.Type };
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var mce = Expression.Call(typeof(Queryable), "OrderBy", types, q.Expression, exp);
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return q.Provider.CreateQuery<T>(mce);
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}
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public static IQueryable<T> OrderByMemberDescending<T>(this IQueryable<T> q, string SortField)
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{
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var param = Expression.Parameter(typeof(T), "p");
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var prop = Expression.Property(param, SortField);
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var exp = Expression.Lambda(prop, param);
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Type[] types = new Type[] { q.ElementType, exp.Body.Type };
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var mce = Expression.Call(typeof(Queryable), "OrderByDescending", types, q.Expression, exp);
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return q.Provider.CreateQuery<T>(mce);
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}
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}
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}
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