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using Newtonsoft.Json;
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using System.ComponentModel;
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using System.Reflection;
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namespace DS.Module.Core.Extensions;
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public static partial class Extensions
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{
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/// <summary>
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/// 判断类型是否为Nullable类型
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/// </summary>
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/// <param name="type"> 要处理的类型 </param>
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/// <returns> 是返回True，不是返回False </returns>
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public static bool IsNullableType(this Type type)
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{
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return ((type != null) && type.IsGenericType) && (type.GetGenericTypeDefinition() == typeof(Nullable<>));
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}
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/// <summary>
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/// 判断当前类型是否可由指定类型派生
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/// </summary>
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/// <typeparam name="TBaseType"></typeparam>
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/// <param name="type"></param>
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/// <param name="canAbstract"></param>
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/// <returns></returns>
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public static bool IsDeriveClassFrom<TBaseType>(this Type type, bool canAbstract = false)
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{
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return IsDeriveClassFrom(type, typeof(TBaseType), canAbstract);
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}
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/// <summary>
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/// 判断当前类型是否可由指定类型派生
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/// </summary>
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public static bool IsDeriveClassFrom(this Type type, Type baseType, bool canAbstract = false)
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{
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type.NotNull(nameof(type));
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baseType.NotNull(nameof(baseType));
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return type.IsClass && (!canAbstract && !type.IsAbstract) && type.IsBaseOn(baseType);
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}
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/// <summary>
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/// 返回当前类型是否是指定基类的派生类
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/// </summary>
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/// <param name="type">当前类型</param>
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/// <param name="baseType">要判断的基类型</param>
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/// <returns></returns>
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public static bool IsBaseOn(this Type type, Type baseType)
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{
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if (baseType.IsGenericTypeDefinition)
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{
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return baseType.IsGenericAssignableFrom(type);
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}
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return baseType.IsAssignableFrom(type);
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}
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/// <summary>
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/// 判断当前泛型类型是否可由指定类型的实例填充
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/// </summary>
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/// <param name="genericType">泛型类型</param>
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/// <param name="type">指定类型</param>
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/// <returns></returns>
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public static bool IsGenericAssignableFrom(this Type genericType, Type type)
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{
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genericType.NotNull(nameof(genericType));
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type.NotNull(nameof(type));
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if (!genericType.IsGenericType)
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{
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throw new ArgumentException("该功能只支持泛型类型的调用，非泛型类型可使用 IsAssignableFrom 方法。");
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}
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List<Type> allOthers = new List<Type> { type };
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if (genericType.IsInterface)
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{
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allOthers.AddRange(type.GetInterfaces());
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}
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foreach (var other in allOthers)
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{
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Type cur = other;
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while (cur != null)
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{
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if (cur.IsGenericType)
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{
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cur = cur.GetGenericTypeDefinition();
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}
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if (cur.IsSubclassOf(genericType) || cur == genericType)
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{
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return true;
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}
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cur = cur.BaseType;
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}
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}
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return false;
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}
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/// <summary>
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/// 通过类型转换器获取Nullable类型的基础类型
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/// </summary>
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/// <param name="type"> 要处理的类型对象 </param>
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/// <returns> </returns>
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public static Type GetUnNullableType(this Type type)
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{
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if (IsNullableType(type))
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{
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NullableConverter nullableConverter = new NullableConverter(type);
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return nullableConverter.UnderlyingType;
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}
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return type;
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}
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/// <summary>
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/// 转换为Bool类型
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/// </summary>
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/// <param name="thisValue"></param>
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/// <returns></returns>
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public static bool ObjToBool(this object thisValue)
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{
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bool reval = false;
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if (thisValue != null && thisValue != DBNull.Value && bool.TryParse(thisValue.ToString(), out reval))
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{
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return reval;
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}
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return reval;
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="thisValue"></param>
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/// <returns></returns>
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public static int ObjToInt(this object thisValue)
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{
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int reval = 0;
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if (thisValue == null) return 0;
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if (thisValue != DBNull.Value && int.TryParse(thisValue.ToString(), out reval))
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{
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return reval;
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}
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return reval;
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="thisValue"></param>
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/// <param name="errorValue"></param>
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/// <returns></returns>
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public static int ObjToInt(this object thisValue, int errorValue)
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{
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int reval = 0;
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if (thisValue != null && thisValue != DBNull.Value && int.TryParse(thisValue.ToString(), out reval))
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{
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return reval;
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}
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return errorValue;
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="thisValue"></param>
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/// <returns></returns>
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public static double ObjToMoney(this object thisValue)
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{
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double reval = 0;
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if (thisValue != null && thisValue != DBNull.Value && double.TryParse(thisValue.ToString(), out reval))
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{
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return reval;
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}
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return 0;
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="thisValue"></param>
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/// <param name="errorValue"></param>
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/// <returns></returns>
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public static double ObjToMoney(this object thisValue, double errorValue)
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{
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double reval = 0;
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if (thisValue != null && thisValue != DBNull.Value && double.TryParse(thisValue.ToString(), out reval))
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{
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return reval;
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}
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return errorValue;
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="thisValue"></param>
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/// <returns></returns>
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public static string ObjToString(this object thisValue)
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{
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if (thisValue != null) return thisValue.ToString().Trim();
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return "";
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="thisValue"></param>
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/// <returns></returns>
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public static bool IsNotEmptyOrNull(this object thisValue)
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{
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return ObjToString(thisValue) != "" && ObjToString(thisValue) != "undefined" &&
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ObjToString(thisValue) != "null";
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}
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public static bool IsNullOrEmpty(this object thisValue) => thisValue == null || thisValue == DBNull.Value ||
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string.IsNullOrWhiteSpace(thisValue.ToString());
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/// <summary>
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///
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/// </summary>
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/// <param name="thisValue"></param>
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/// <returns></returns>
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public static Decimal ObjToDecimal(this object thisValue)
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{
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Decimal reval = 0;
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if (thisValue != null && thisValue != DBNull.Value && decimal.TryParse(thisValue.ToString(), out reval))
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{
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return reval;
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}
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return 0;
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="thisValue"></param>
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/// <param name="errorValue"></param>
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/// <returns></returns>
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public static Decimal ObjToDecimal(this object thisValue, decimal errorValue)
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{
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Decimal reval = 0;
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if (thisValue != null && thisValue != DBNull.Value && decimal.TryParse(thisValue.ToString(), out reval))
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{
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return reval;
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}
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return errorValue;
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="thisValue"></param>
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/// <returns></returns>
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public static DateTime ObjToDate(this object thisValue)
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{
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DateTime reval = DateTime.MinValue;
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if (thisValue != null && thisValue != DBNull.Value && DateTime.TryParse(thisValue.ToString(), out reval))
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{
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reval = Convert.ToDateTime(thisValue);
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}
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return reval;
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="thisValue"></param>
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/// <param name="errorValue"></param>
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/// <returns></returns>
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public static DateTime ObjToDate(this object thisValue, DateTime errorValue)
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{
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DateTime reval = DateTime.MinValue;
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if (thisValue != null && thisValue != DBNull.Value && DateTime.TryParse(thisValue.ToString(), out reval))
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{
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return reval;
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}
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return errorValue;
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}
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/// <summary>
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/// 获取当前时间的时间戳
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/// </summary>
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/// <param name="thisValue"></param>
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/// <returns></returns>
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public static string DateToTimeStamp(this DateTime thisValue)
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{
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TimeSpan ts = thisValue - new DateTime(1970, 1, 1, 0, 0, 0, 0);
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return Convert.ToInt64(ts.TotalSeconds).ToString();
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}
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public static object ChangeType(this object value, Type type)
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{
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if (value == null && type.IsGenericType) return Activator.CreateInstance(type);
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if (value == null) return null;
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if (type == value.GetType()) return value;
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if (type.IsEnum)
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{
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if (value is string)
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return Enum.Parse(type, value as string);
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else
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return Enum.ToObject(type, value);
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}
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if (!type.IsInterface && type.IsGenericType)
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{
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Type innerType = type.GetGenericArguments()[0];
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object innerValue = ChangeType(value, innerType);
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return Activator.CreateInstance(type, new object[] { innerValue });
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}
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if (value is string && type == typeof(Guid)) return new Guid(value as string);
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if (value is string && type == typeof(Version)) return new Version(value as string);
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if (!(value is IConvertible)) return value;
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return Convert.ChangeType(value, type);
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}
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public static object ChangeTypeList(this object value, Type type)
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{
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if (value == null) return default;
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var gt = typeof(List<>).MakeGenericType(type);
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dynamic lis = Activator.CreateInstance(gt);
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var addMethod = gt.GetMethod("Add");
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string values = value.ToString();
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if (values != null && values.StartsWith("(") && values.EndsWith(")"))
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{
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string[] splits;
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if (values.Contains("\",\""))
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{
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splits = values.Remove(values.Length - 2, 2)
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.Remove(0, 2)
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.Split("\",\"");
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}
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else
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{
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splits = values.Remove(0, 1)
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.Remove(values.Length - 2, 1)
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.Split(",");
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}
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foreach (var split in splits)
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{
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var str = split;
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if (split.StartsWith("\"") && split.EndsWith("\""))
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{
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str = split.Remove(0, 1)
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.Remove(split.Length - 2, 1);
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}
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addMethod.Invoke(lis, new object[] { ChangeType(str, type) });
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}
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}
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return lis;
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}
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public static string ToJson(this object value)
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{
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return JsonConvert.SerializeObject(value);
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}
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/// <summary>
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/// 判断是否IEnumerable、ICollection类型
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/// </summary>
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/// <param name="type"></param>
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/// <returns></returns>
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// public static bool IsEnumerable(this Type type)
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// {
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// return type.IsArray
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// || type.GetInterfaces().Any(x => x == typeof(ICollection) || x == typeof(IEnumerable));
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// }
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/// <summary>
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/// 从类型成员获取指定Attribute特性
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/// </summary>
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/// <typeparam name="T">Attribute特性类型</typeparam>
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/// <param name="memberInfo">类型类型成员</param>
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/// <param name="inherit">是否从继承中查找</param>
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/// <returns>存在返回第一个，不存在返回null</returns>
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public static T GetAttribute<T>(this MemberInfo memberInfo, bool inherit = true) where T : Attribute
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{
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var attributes = memberInfo.GetCustomAttributes(typeof(T), inherit);
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return attributes.FirstOrDefault() as T;
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}
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/// <summary>
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/// 从类型成员获取指定Attribute特性
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/// </summary>
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/// <param name="type">Attribute特性类型</param>
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/// <param name="memberInfo">类型类型成员</param>
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/// <param name="inherit">是否从继承中查找</param>
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/// <returns>存在返回第一个，不存在返回null</returns>
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public static Type GetAttribute(this MemberInfo memberInfo, Type type, bool inherit = true)
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{
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var attributes = memberInfo.GetCustomAttributes(type, inherit);
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return attributes.FirstOrDefault() as Type;
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}
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/// <summary>
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/// 判断是否实体类型
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/// </summary>
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/// <param name="type"></param>
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/// <returns></returns>
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// public static bool IsEntityType(this Type type)
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// {
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// type.NotNull(nameof(type));
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// return typeof(IEntityWithIdentity<>).IsGenericAssignableFrom(type) && !type.IsAbstract && !type.IsInterface;
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// }
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/// <summary>
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/// 转换为Guid类型
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/// </summary>
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/// <param name="str"></param>
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/// <returns></returns>
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public static Guid ToGuid(this string str)
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{
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Guid guid;
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if (Guid.TryParse(str, out guid))
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{
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return guid;
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}
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else
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{
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return Guid.Empty;
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}
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}
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public static string ToDescription(this MemberInfo member)
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{
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DescriptionAttribute desc = member.GetCustomAttribute<DescriptionAttribute>();
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if (!desc.IsNull())
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{
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return desc.Description;
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}
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//显示名
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DisplayNameAttribute display = member.GetCustomAttribute<DisplayNameAttribute>();
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if (!display.IsNull())
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{
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return display.DisplayName;
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}
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return member.Name;
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}
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public static string GetKeySelector(this Type type, string keyName)
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{
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string[] propertyNames = keyName.Split(".");
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return propertyNames.Select(o => type.GetProperty(o)).FirstOrDefault()?.Name;
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}
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} |