Getting value of static property by string name

Question

There's a great post here that gives a way to get the value of a property by its string name:

public static object GetPropValue(object src, string propName)
{
    return src.GetType().GetProperty(propName).GetValue(src, null);
}

Currently, I'm trying to get the value of a static property in a base class. If I try to use BaseClass.Prop as 'src', however, I get a null reference exception. While src isn't associated with an explicit instance, the value of Prop I'm trying to get nevertheless still exists.

Is there a workaround for static properties?

T McKeown · Accepted Answer · 2014-04-14 19:34:24Z

4

Don't send a src when calling static properties.

 Type t = src.GetType();

 if (t.GetProperty(propName).GetGetMethod().IsStatic)
 {   
     src = null;
 }
 return t.GetProperty(propName).GetValue(src, null);

edited Apr 14, 2014 at 19:34

answered Apr 14, 2014 at 19:28

T McKeown

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3 Comments

rookie Over a year ago

Is there a way to programatically check if the property is static?

MethodMan Over a year ago

checkout this post [stackoverflow.com/questions/451453/…

vcsjones Over a year ago

@gjdanis You need to check if the GetSetMethod or GetGetMethod methods on PropertyInfo, the MethodInfo will tell you if it is start.

Michael Gunter · Accepted Answer · 2014-04-14 19:32:39Z

1

To get a static property, you cannot pass an object reference. To detect if a property-get is static, look at propertyInfo.GetGetMethod().IsStatic. Here's your GetPropValue method:

public static object GetPropValue(object src, string propName)
{
    var propertyInfo = src.GetType().GetProperty(propName);
    if (propertyInfo.GetGetMethod().IsStatic)
        return propertyInfo.GetValue(null, null);
    else
        return propertyInfo.GetValue(src, null);
}

answered Apr 14, 2014 at 19:32

Michael Gunter

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