74 lines
2.1 KiB
C#
74 lines
2.1 KiB
C#
using System.Reflection;
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namespace YLErp.Helpers
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{
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public static class ReflectionHelper
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{
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/// <summary>
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/// 用于找出属性值为double.nan的对象
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/// 以帮助EF保存时能够避免出错
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/// </summary>
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[System.Diagnostics.Conditional("DEBUG")]
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public static void CheckNanValue<T>(IEnumerable<T> objs) where T : class
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{
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CheckNanValue2(objs);
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}
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/// <summary>
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/// 远程调试的时候使用，程序内不要调用
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/// </summary>
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public static void CheckNanValue2<T>(IEnumerable<T> objs) where T : class
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{
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if (objs is null)
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{
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throw new ArgumentNullException(nameof(objs));
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}
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var props = typeof(T).GetTypeInfo().GetProperties(BindingFlags.Instance | BindingFlags.Public)
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.Where(n => n.CanRead && (n.PropertyType == typeof(double) || n.PropertyType == typeof(double?))).ToArray();
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foreach (var obj in objs)
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{
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foreach (var p in props)
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{
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var dobj = p.GetValue(obj);
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if (dobj == null)
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{
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continue;
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}
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double dd;
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if (dobj is double?)
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{
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dd = ((double?)dobj).Value;
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}
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else
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{
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dd = (double)dobj;
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}
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if (double.IsNaN(dd))
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{
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throw new Exception("找到一个NaN:" + p.Name);
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}
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}
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}
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="t"></param>
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public static bool IsNullableType(Type t)
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{
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if (t is null)
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{
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throw new ArgumentNullException(nameof(t));
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}
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return t.GetTypeInfo().IsGenericType && t.GetGenericTypeDefinition() == typeof(Nullable<>);
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}
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}
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}
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