blocks|key|947201|text|你必须使用反射|type|unstyled|depth|inlineStyleRanges|entityRanges|data|947202|public+object+GetPropertyValue(object+car,+string+propertyName)
{
+++return+car.GetType().GetProperties()
++++++.Single(pi+=>+pi.Name+==+propertyName)
++++++.GetValue(car,+null);
}|code-block|syntax|javascript|947203|如果你想让它变得更花哨，你可以把它变成一个扩展方法：|947204|public+static+object+GetPropertyValue(this+object+car,+string+propertyName)
{
+++return+car.GetType().GetProperties()
++++++.Single(pi+=>+pi.Name+==+propertyName)
++++++.GetValue(car,+null);
}|947205|然后：|947206|string+makeValue+=+(string)car.GetPropertyValue("Make");|947207|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

You'd have to use reflection

<pre><code>public object GetPropertyValue(object car, string propertyName)
{
 return car.GetType().GetProperties()
 .Single(pi =&gt; pi.Name == propertyName)
 .GetValue(car, null);
}
</code></pre>

If you want to be really fancy, you could make it an extension method:

<pre><code>public static object GetPropertyValue(this object car, string propertyName)
{
 return car.GetType().GetProperties()
 .Single(pi =&gt; pi.Name == propertyName)
 .GetValue(car, null);
}
</code></pre>

And then:

<pre><code>string makeValue = (string)car.GetPropertyValue("Make");
</code></pre>

blocks|key|947218|text|return+car.GetType().GetProperty(propertyName).GetValue(car,+null);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|947219|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>return car.GetType().GetProperty(propertyName).GetValue(car, null);
</code></pre>

blocks|key|731230|text|你想要反射|type|unstyled|depth|inlineStyleRanges|entityRanges|data|731231|Type+t+=+typeof(Car);
PropertyInfo+prop+=+t.GetProperty("Make");
if(null+!=+prop)
return+prop.GetValue(this,+null);|code-block|syntax|javascript|731232|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You want Reflection

<pre><code>Type t = typeof(Car);
PropertyInfo prop = t.GetProperty("Make");
if(null != prop)
return prop.GetValue(this, null);
</code></pre>

blocks|key|947258|text|简单的示例(不需要在客户端编写反射硬代码)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|947259|class+Customer
{
++++public+string+CustomerName+{+get;+set;+}
++++public+string+Address+{+get;+set;+}
++++//+approach+here
++++public+string+GetPropertyValue(string+propertyName)
++++{
++++++++try
++++++++{
++++++++++++return+this.GetType().GetProperty(propertyName).GetValue(this,+null)+as+string;
++++++++}
++++++++catch+{+return+null;+}
++++}
}
//use+sample
static+void+Main(string[]+args)
++++{
++++++++var+customer+=+new+Customer+{+CustomerName+=+"Harvey+Triana",+Address+=+"Something..."+};
++++++++Console.WriteLine(customer.GetPropertyValue("CustomerName"));
++++}|code-block|syntax|javascript|947260|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Simple sample (without write reflection hard code in the client)

<pre><code>class Customer
{
 public string CustomerName { get; set; }
 public string Address { get; set; }
 // approach here
 public string GetPropertyValue(string propertyName)
 {
 try
 {
 return this.GetType().GetProperty(propertyName).GetValue(this, null) as string;
 }
 catch { return null; }
 }
}
//use sample
static void Main(string[] args)
 {
 var customer = new Customer { CustomerName = "Harvey Triana", Address = "Something..." };
 Console.WriteLine(customer.GetPropertyValue("CustomerName"));
 }
</code></pre>

blocks|key|947290|text|对Adam+Rackis的答案进行扩展--我们可以像这样简单地使扩展方法泛型：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|947291|public+static+TResult+GetPropertyValue<TResult>(this+object+t,+string+propertyName)
{
++++object+val+=+t.GetType().GetProperties().Single(pi+=>+pi.Name+==+propertyName).GetValue(t,+null);
++++return+(TResult)val;
}|code-block|syntax|javascript|947292|如果你愿意，你也可以抛出一些错误处理。|947293|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Expanding on Adam Rackis's answer - we can make the extension method generic simply like this:

<pre><code>public static TResult GetPropertyValue&lt;TResult&gt;(this object t, string propertyName)
{
 object val = t.GetType().GetProperties().Single(pi =&gt; pi.Name == propertyName).GetValue(t, null);
 return (TResult)val;
}
</code></pre>

You can throw some error handling around that too if you like.

blocks|key|731377|text|为了避免反射，您可以使用属性名称作为字典值部分中的键和函数来设置Dictionary，以从您请求的属性返回相应值。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|731378|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

To avoid reflection you could set up a Dictionary with your propery names as keys and functions in the dictionary value part that return the corresponding values from the properties that you request.

is there a way to get the value of a property of a object based on its name?

For example if I have:

<pre><code>public class Car : Vehicle
{
 public string Make { get; set; }
}
</code></pre>

and

<pre><code>var car = new Car { Make="Ford" };
</code></pre>

I want to write a method where I can pass in the property name and it would return the property value. ie:

<pre><code>public string GetPropertyValue(string propertyName)
{
 return the value of the property;
}
</code></pre>

How to get a property value based on the name

有没有一种方法可以根据对象的名称来获取属性的值？例如，如果我有：public class Car : Vehicle{   public string Make { get; set; }}和var car = new Car { Make="Ford" };我想写一个方法，在这个方法中，我可以传入属性名，它将返回属性...

问如何根据名称获取属性值
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问如何根据名称获取属性值
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