How to get or set a nested class property using C#

Summary: C# methods to set and get nested class property values.

If you need to get a set a value of a nested object property, here is a couple of functions that can help you do it using reflection (.NET 4.7, C#):

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/// <summary> /// Gets the value of a nested object property. /// </summary> /// <param name="source"> /// Project that owns the property. /// < /param> /// <param name="name"> /// Name of the property. /// < /param> /// <returns> /// Property value (or <c>null</c>, if property does not exists). /// </returns> /// <remarks> /// <para> /// The code assumes that the property exists; /// if it does not, the code will return <c>null</c>. /// </para> /// <para> /// The property does not need to be nested. /// </para> /// <para> /// The code handles both class properties and fields. /// </para> /// </remarks> public static object GetPropertyValue (     object source,     string name ) {     if (name.Contains("."))     {         var names = name.Split(new char[] { '.' }, 2);           return GetPropertyValue(GetPropertyValue(source, names[0]), names[1]);     }     else     {         PropertyInfo prop = null;           prop = source.GetType().GetProperty(name);           if (prop != null)             return prop != null ? prop.GetValue(source) : null;           FieldInfo field = source.GetType().GetField(name);           if (field == null) return null;           return field.GetValue(source);     } }   /// <summary> /// Sets the value of a nested object property. /// </summary> /// <param name="target"> /// Object that owns the property to be set. /// < /param> /// <param name="name"> /// Name of the property. /// < /param> /// <param name="value"> /// Property value. /// < /param> /// <remarks> /// <para> /// The code assumes that the property exists; /// if it does not, the code will do nothing. /// </para> /// <para> /// The property does not need to be nested. /// </para> /// <para> /// The code handles both class properties and fields. /// </para> /// </remarks> public static void SetPropertyValue (     object target,     string name,     object value ) {     var names = name.Split('.');       for (int i = 0; i < names.Length - 1; i++)     {         PropertyInfo prop = target.GetType().GetProperty(names[i]);         if (prop != null)         {             target = prop.GetValue(target);             continue;         }           FieldInfo field = target.GetType().GetField(names[i]);         if (field != null)         {             target = field.GetValue(target);             continue;         }           return;     }       PropertyInfo targetProp = target.GetType().GetProperty(names.Last());       if (targetProp != null)         targetProp.SetValue(target, value); }