通过C#反射把一个对象的值给另一个对象报错"对象类型与目标对象类型不一致"
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[待解决问题]
public class Test { public double Menuid { get; set; } public double Userid { get; set; } public string Menuname { get; set; } public string Name { get; set; } public DateTime Operatetime { get; set; } public string Operateip { get; set; } public string Operatetype { get; set; } } public class Entity { public double Menuid { get; set; } public double Userid { get; set; } public string Menuname { get; set; } public string Name { get; set; } public DateTime Operatetime { get; set; } public string Operateip { get; set; } public string Operatetype { get; set; } } 测试: Entity entity = new Entity { Menuid = 1.0f, Menuname = "Case", Name = "mike", Operateip = "192.168.10.113", Operatetime = DateTime.Now.ToLocalTime(), Operatetype = "Edit", Userid = 102.0f }; try { Test t = new Test(); var en = entity.GetType().GetProperties(); foreach (var prop in en) { var value = prop.GetValue(entity, null); if (prop != null && prop.CanWrite) { prop.SetValue(t, Convert.ChangeType(value, prop.PropertyType), null); //if (!prop.PropertyType.IsGenericTypeDefinition) //{ // prop.SetValue(t, (string.IsNullOrEmpty(value.ToString()) ? null : Convert.ChangeType(value, prop.PropertyType)), null); //} //else //{ // Type genericTypeDefinition = prop.PropertyType.GetGenericTypeDefinition(); // if (genericTypeDefinition == typeof(Nullable<>)) // { // prop.SetValue(t, (string.IsNullOrEmpty(value.ToString()) ? null : Convert.ChangeType(value,Nullable.GetUnderlyingType( prop.PropertyType))), null); // } //} } } Console.WriteLine(t.Name); } catch (Exception ex) { ex.ToString(); } #endregion
所有回答(3)
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你调试的时候看看是哪个属性出错，值是啥。
刚进去的时候,value的值是1.0,然后就报错是了?
@jackcnblog: 别自己写了，AutoMapper，能搞定你所有的这些需求，包括你补充的需求。
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问题出在你定义了两个类Test和Entity,虽说这两个类有相同的属性,但是指向的确是不同的堆.
你要Entity的属性反射到Test里,如Test.Menuid和Entity.Menuid当然不是同一块指向,所以就报出这样的错误
Test t = new Test();改成Entity t = new Entity();就可以反射成功,当然这也没什么意义.
如果你想把Entity的值赋值给Test最好还是手动赋值一下.
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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace ConsoleApplication8 { class Program { static void Main(string[] args) { Entity entity = new Entity { Menuid = 1.0f, Menuname = "Case", Name = "mike", Operateip = "192.168.10.113", Operatetime = DateTime.Now.ToLocalTime(), Operatetype = "Edit", Userid = 102.0f }; try { Test t = new Test(); var en = entity.GetType().GetProperties(); var enT = t.GetType().GetProperties(); foreach (System.Reflection.PropertyInfo prop in en) { var value = prop.GetValue(entity, null); if (prop != null && prop.CanWrite) { foreach (System.Reflection.PropertyInfo item in enT) { if (prop.Name.Equals(item.Name)) { item.SetValue(t, value); } } } } Console.WriteLine(t.Name); } catch (Exception ex) { ex.ToString(); } } } public class Test { public double Menuid { get; set; } public double Userid { get; set; } public string Menuname { get; set; } public string Name { get; set; } public DateTime Operatetime { get; set; } public string Operateip { get; set; } public string Operatetype { get; set; } } public class Entity { public double Menuid { get; set; } public double Userid { get; set; } public string Menuname { get; set; } public string Name { get; set; } public DateTime Operatetime { get; set; } public string Operateip { get; set; } public string Operatetype { get; set; } } }
