用反射获取listT对象的属性值

liujiahaol123 2013-09-22 02:06:10

刚学反射，这样的该怎么写，给点代码参考下

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ajdkjalj 2013-09-22

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public static string GetObjectPropertyValue(IList<T> list, string propertyname)
{
 string str="";
foreach(T t in list)
{
     Type type = typeof(T);
 
      PropertyInfo property = type.GetProperty(propertyname);
 
      if (property == null) return string.Empty;
 
      object o = property.GetValue(t, null);
 
      if (o == null) return string.Empty;
 
      str= o.ToString();
}
return str;
}

liujiahaol123 2013-09-22

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引用 12 楼 zhuankeshumo 的回复:

foreach(model m in listmodel) { var s= GetObjectPropertyValue(m,"name"); //然后你想干嘛就干嘛吧！ }
引用 11 楼 liujiahaol123 的回复:

真心感谢

newtee 2013-09-22

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foreach(model m in listmodel) { var s= GetObjectPropertyValue(m,"name"); //然后你想干嘛就干嘛吧！ }

引用 11 楼 liujiahaol123 的回复:

liujiahaol123 2013-09-22

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引用 9 楼 zhuankeshumo 的回复:

[quote=引用 8 楼 liujiahaol123 的回复:] [quote=引用 7 楼 zhuankeshumo 的回复:]

IList<Model1> lm = new List<Model1>();
            lm.Add(new Model1() { Age = 15, S = 131456, Email = "121212@qq.com" });
            lm.Add(new Model1() { Name="小李",Age = 25, S = 231456, Email = "121212@qq.com" });

            IList<Dictionary<string, object>> ld = new List<Dictionary<string, object>>();

            PropertyInfo[] props = typeof(Model1).GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly);
            foreach (Model1 _model in lm)
            {
                Dictionary<string, object> values = new Dictionary<string, object>();
                foreach (PropertyInfo property in props)
                {
                    values.Add(property.Name, property.GetValue(_model, property.GetIndexParameters()));
                }
                ld.Add(values);
            }

小弟虚心请教，这个是不是获得所有属性的值，我想弄一个函数，获取一个指定的属性值，函数的形式就像这种public static string GetObjectPropertyValue(IList<T> list, string propertyname)[/quote]

你一楼写的是什么？你到底想要啥？[/quote] 我就是想通过函数，指定list<T>T的属性，然后返回一个string类型的属性值，比如我传入name这个参数，然后返回list里T.name的值

newtee 2013-09-22

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加个foreach，然后在foreach内部调用list<T>对象不就行了吗？

newtee 2013-09-22

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引用 8 楼 liujiahaol123 的回复:

[quote=引用 7 楼 zhuankeshumo 的回复:]

IList<Model1> lm = new List<Model1>();
            lm.Add(new Model1() { Age = 15, S = 131456, Email = "121212@qq.com" });
            lm.Add(new Model1() { Name="小李",Age = 25, S = 231456, Email = "121212@qq.com" });

            IList<Dictionary<string, object>> ld = new List<Dictionary<string, object>>();

            PropertyInfo[] props = typeof(Model1).GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly);
            foreach (Model1 _model in lm)
            {
                Dictionary<string, object> values = new Dictionary<string, object>();
                foreach (PropertyInfo property in props)
                {
                    values.Add(property.Name, property.GetValue(_model, property.GetIndexParameters()));
                }
                ld.Add(values);
            }

你一楼写的是什么？你到底想要啥？

liujiahaol123 2013-09-22

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引用 7 楼 zhuankeshumo 的回复:

IList<Model1> lm = new List<Model1>();
            lm.Add(new Model1() { Age = 15, S = 131456, Email = "121212@qq.com" });
            lm.Add(new Model1() { Name="小李",Age = 25, S = 231456, Email = "121212@qq.com" });

            IList<Dictionary<string, object>> ld = new List<Dictionary<string, object>>();

            PropertyInfo[] props = typeof(Model1).GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly);
            foreach (Model1 _model in lm)
            {
                Dictionary<string, object> values = new Dictionary<string, object>();
                foreach (PropertyInfo property in props)
                {
                    values.Add(property.Name, property.GetValue(_model, property.GetIndexParameters()));
                }
                ld.Add(values);
            }

小弟虚心请教，这个是不是获得所有属性的值，我想弄一个函数，获取一个指定的属性值，函数的形式就像这种public static string GetObjectPropertyValue(IList<T> list, string propertyname)

newtee 2013-09-22

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IList<Model1> lm = new List<Model1>();
            lm.Add(new Model1() { Age = 15, S = 131456, Email = "121212@qq.com" });
            lm.Add(new Model1() { Name="小李",Age = 25, S = 231456, Email = "121212@qq.com" });

            IList<Dictionary<string, object>> ld = new List<Dictionary<string, object>>();

            PropertyInfo[] props = typeof(Model1).GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly);
            foreach (Model1 _model in lm)
            {
                Dictionary<string, object> values = new Dictionary<string, object>();
                foreach (PropertyInfo property in props)
                {
                    values.Add(property.Name, property.GetValue(_model, property.GetIndexParameters()));
                }
                ld.Add(values);
            }

newtee 2013-09-22

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  IList<Model1> lm = new List<Model1>();
            lm.Add(new Model1() { Age = 15, S = 131456, Email = "121212@qq.com" });
            lm.Add(new Model1() { Name="小李",Age = 25, S = 231456, Email = "121212@qq.com" });

            IList<Dictionary<string, object>> ld = new List<Dictionary<string, object>>();

            foreach (Model1 _model in lm)
            {
                PropertyInfo[] props =_model.GetType().GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly);
                Dictionary<string, object> values = new Dictionary<string, object>();
                foreach (PropertyInfo property in props)
                {
                    values.Add(property.Name, property.GetValue(model, property.GetIndexParameters()));
                }
                ld.Add(values);
            }  
    public class Model1
    {
        public string Name { get; set; }

        public int Age { get; set; }

        public int S { get; set; }

        public string Email { get; set; }
    }

newtee 2013-09-22

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引用楼主 liujiahaol123 的回复:

刚学反射，这样的该怎么写，给点代码参考下

你要反射model中属性的属性值？一个model中有多个属性值啊property.GetValue(t, null) 这样想干嘛反射出什么

jiaoshiyao 2013-09-22

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发错Sorry

全栈极简 2013-09-22

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Type tt = t.First<T>().GetType();//反射这个，不是反射IList

liujiahaol123 2013-09-22

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public static string GetObjectPropertyValue<T>(T t, string propertyname)
{
     Type type = typeof(T);

      PropertyInfo property = type.GetProperty(propertyname);

      if (property == null) return string.Empty;

      object o = property.GetValue(t, null);

      if (o == null) return string.Empty;

      return o.ToString();
}

这个是类的，我把他改成

public static string GetObjectPropertyValue(IList<T> list, string propertyname)
{
     Type type = list.GetType();

      PropertyInfo property = type.GetProperty(propertyname);

      if (property == null) return string.Empty;

      object o = property.GetValue(t, null);

      if (o == null) return string.Empty;

      return o.ToString();
}

object o = property.GetValue(t, null);里的t我该怎么改