Get value of a specific object property in C without knowing the class behind

Question

I have an object   NET  of type  object   I don t know the  real type  class   behind it during runtime   but I know  that the object has a property  string name   How can I retrive the value of  name   Is this possible   something like this   object item   AnyFunction        string value   item name

User · Accepted Answer

Use reflection  System Reflection PropertyInfo pi   item GetType   GetProperty  name    String name    String  pi GetValue item  null

User · Answer

In some cases  Reflection doesn t work properly   You could use dictionaries  if all item types are the same  For instance  if your items are strings    Dictionary lt string  string gt  response   JsonConvert DeserializeObject lt Dictionary lt string  string gt  gt  item     Or ints   Dictionary lt string  int gt  response   JsonConvert DeserializeObject lt Dictionary lt string  int gt  gt  item

User · Answer

Simply try this for all properties of an object   foreach  var prop in myobject GetType   GetProperties BindingFlags Public BindingFlags Instance        var propertyName   prop Name     var propertyValue   myobject GetType   GetProperty propertyName  GetValue myobject  null         Debug Print prop Name        Debug Print Functions convertNullableToString propertyValue        Debug Print string Format  Property Name  0    Value  1    prop Name  Functions convertNullableToString propertyValue         NOTE  Functions convertNullableToString   is custom function using for convert NULL value into string empty

User · Answer

You can do it using dynamic instead of object  dynamic item   AnyFunction        string value   item name   Note that the Dynamic Language Runtime  DLR  has built-in caching mechanisms  so subsequent calls are very fast

User · Answer

Reflection and dynamic value access are correct solutions to this question but are quite slow  If your want something faster then you can create dynamic method using expressions     object value   GetValue      string propertyName    MyProperty      var parameter   Expression Parameter typeof object      var cast   Expression Convert parameter  value GetType       var propertyGetter   Expression Property cast  propertyName     var castResult   Expression Convert propertyGetter  typeof object     for boxing    var propertyRetriver   Expression Lambda lt Func lt object  object gt  gt  castResult  parameter  Compile      var retrivedPropertyValue   propertyRetriver value     This way is faster if you cache created functions  For instance in dictionary where key would be the actual type of object assuming that property name is not changing or some combination of type and property name

User · Answer

Reflection can help you   var someObject  var propertyName    PropertyWhichValueYouWantToKnow   var propertyName   someObject GetType   GetProperty propertyName  GetValue someObject  null

[c#] Get value of a specific object property in C# without knowing the class behind

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