WebMar 22, 2024 · The class inherits from IDictionary. This class supports the ContainsKey method and this will do what you need it to do. So if you cast the expando object to a dictionary first, you can use the contains key method to check if a key exists. Use the following if statement to check if a property exists in an expando object. WebApr 28, 2024 · Tips for Working with the dynamic Type in C#. The dynamic type was introduced in C# 4 to avoid static type checking. This allows working with data without a …
Using type dynamic Microsoft Learn
http://www.tomdupont.net/2013/10/check-properties-of-dynamic-object-in-net.html WebJan 16, 2024 · Specifically, a dynamic value can be: Null. A value of any of the primitive scalar data types: bool, datetime, guid, int, long, real, string, and timespan. An array of dynamic values, holding zero or more values with zero-based indexing. A property bag that maps unique string values to dynamic values. princess hard shell rolling luggage
c# - Test if a property is available on a dynamic variable
WebOct 15, 2024 · Dynamic object interoperability are C# types you can use to access the DLR. These types include DynamicObject and ExpandoObject. There are more types … WebC#. Copy. public bool ContainsKey ( string propertyName) Parameters propertyName Type: System String Name of the property. Return Value Type: Boolean true if the JSON object has the specified property name; otherwise, false. Implements IDictionary TKey, TValue ContainsKey(TKey) See Also. Reference. WebNov 16, 2011 · I cannot seem to find a way to determine if a property exists or not. For example, some of the checkboxes in our Delphi application contain ValueChecked and … princess happy wand