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- Question: ASP.NET Web API 2 – [FromBody] is null
- Time: Asked 100 minute ago
- Modified: Askeded 193 hours ago
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ASP.NET Web API 2 – [FromBody] is null
If you are experiencing a problem where the [FromBody]
attribute is returning null in your ASP.NET Web API 2 project, here are a few things you can try:
-
Ensure that the request payload is in the correct format:
[FromBody]
is used to bind data from the request body in JSON or XML format. Make sure that the request payload is in the correct format. -
Check the content type of the request: If the content type of the request is not set to
application/json
orapplication/xml
, the[FromBody]
attribute may not be able to parse the request body. Make sure that the content type of the request is set to the appropriate value. -
Make sure that the request body is not empty: If the request body is empty, the
[FromBody]
attribute will return null. Make sure that the request body contains the data that you are trying to bind. -
Check if the model being bound has default values: If the model being bound has default values, the
[FromBody]
attribute may not be able to bind the data correctly. Try adding the[DataContract]
attribute to the model and adding the[DataMember]
attribute to each property that you want to bind. -
Use a tool like Fiddler or Postman to inspect the request and response: Inspect the request and response using a tool like Fiddler or Postman to see if there are any errors or issues that may be causing the
[FromBody]
attribute to return null. -
Check if the model is being bound correctly: If the
[FromBody]
attribute is still returning null, try binding the data using a different method, such as using the[FromForm]
attribute to bind data from form data or the[FromUri]
attribute to bind data from query string parameters.
By following these steps, you should be able to diagnose and resolve the issue with the [FromBody]
attribute returning null in your ASP.NET Web API 2 project.
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![C# - Null Value When Pass Values [Frombody] To Post Method By Postman Plugin - Stack Overflow](https://i.stack.imgur.com/1X3Ce.png)
![C# - Web Api [Frombody] Parameter Is Null When Sending An Array Of Objects - Stack Overflow](https://i.stack.imgur.com/DsIjc.png)

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