实体类相同属性间赋值与如何判断实体类中是否所有的字段都为null
1,实体类相同属性间赋值
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/// <summary> /// 将实体2的值动态赋值给实体1(名称一样的属性进行赋值) /// </summary> /// <param name="model1">实体1</param> /// <param name="model2">实体2</param> /// <returns>赋值后的model1</returns> protected static T1 BindModelValue<T1, T2>(T1 model1, T2 model2) where T1 : class where T2 : class { if (model2 != null) { Type t1 = model1.GetType(); Type t2 = model2.GetType(); PropertyInfo[] property2 = t2.GetProperties(); //排除主键 List<string> exclude = new List<string>() { "Id" }; foreach (PropertyInfo p in property2) { if (exclude.Contains(p.Name)) { continue; } t1.GetProperty(p.Name)?.SetValue(model1, p.GetValue(model2, null)); } return model1; } return null; }
2、判断实体类中是否所有的字段都为null
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public static Boolean IsPropNull(Object obj) { Type t = obj.GetType(); PropertyInfo[] props = t.GetProperties(); foreach (var item in props) { //排除主键id if (item.Name == "Id") { continue; } //一旦有不为null的值,就返回true if (item.GetValue(obj) != null) { return true; } } return false; }