dynamic

C# – Adding dynamic parameters with Dapper

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The simplest way to add dynamic parameters when executing queries with Dapper is by passing in Dictionary<string, object>, like this: Read more about how to add items to a dictionary. You can also add dynamic parameter by using the DynamicParameters class. You can use whichever approach is simplest in the given scenario. In this article, … Read more

C# – How to use JsonConverterFactory

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Let’s say you want to serialize the four datetime types – DateTime, DateTime?, DateTimeOffset, and DateTimeOffset? – in the same way. You want to serialize them to use the US date style (ex: 7/14/2021). There are two main ways to accomplish this: 1) Create a custom JsonConverter for each type or 2) Create a JsonConverterFactory … Read more

C# – Cannot use a lambda expression as an argument to a dynamically dispatched operation

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Problem You are trying to use a lambda expression on a dynamic object and get the following compiler error: Cannot use a lambda expression as an argument to a dynamically dispatched operation without first casting it to a delegate or expression tree type. As an example, the following code causes this error: Solution Cast the … Read more

C# – Deserialize JSON to dynamic object

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If you want to deserialize JSON without having to create a bunch of classes, you can either deserialize to a dictionary or deserialize to a dynamic object with Newtonsoft.Json. Here’s an example. Let’s say you want to deserialize the following JSON: To deserialize this to a dynamic object with Newtonsoft, use JsonConvert.DeserializeObject<dynamic>: This outputs the … Read more