Скачать или смотреть How to Fix PHP json_encode Issues When Converting to C# Objects

Learn how to resolve C# deserialization errors caused by incorrect JSON formatting from PHP outputs.
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This video is based on the question https://stackoverflow.com/q/68327828/ asked by the user 'JianYA' ( https://stackoverflow.com/u/4907861/ ) and on the answer https://stackoverflow.com/a/68328198/ provided by the user 'Roar S.' ( https://stackoverflow.com/u/14072498/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Solving PHP json_encode to C# Object Conversion Issues

When working with data interchange between PHP and C# , it's common to encounter challenges, especially when encoding and decoding JSON. One such problem occurs when attempting to deserialize a JSON string into a C# object, only to face errors indicating that the conversion failed. This guide will address this issue step-by-step, focusing on a practical solution that works seamlessly.

The Problem

A user tried to convert a JSON array generated from a PHP script to a C# object but ran into a deserialization error. The JSON string contained details of a file upload but included formatting issues. The relevant error message showed that the expected C# object type could not be matched with the JSON format returned by PHP:

[[See Video to Reveal this Text or Code Snippet]]

This error typically arises from discrepancies in how the JSON is structured or formatted.

Understanding the Structure

Let's dissect the JSON structure provided:

[[See Video to Reveal this Text or Code Snippet]]

The C# Model

The corresponding C# class definition, FileUploadResultViewModel, was structured as follows:

[[See Video to Reveal this Text or Code Snippet]]

The Issue

The primary issue here is the mismatch between data types. In particular:

is_successful in the JSON is a boolean, while in the C# class it is defined as a string.

email is an array in the JSON but represented as a string in C# .

The Solution

To correctly manage this conversion, we need to ensure that the data types in our C# model match the expected types from the JSON. Here’s how to fix the problematic areas:

1. Update the C# Model

Change the is_successful type from string to bool and email from string to List<string> to reflect the structure of the incoming JSON:

[[See Video to Reveal this Text or Code Snippet]]

2. Correct the JSON Serialization Before Sending

In your C# method that makes the request, ensure correct serialization of the request body:

[[See Video to Reveal this Text or Code Snippet]]

3. Successfully Deserialize the JSON

Finally, you can now deserialize the JSON content returned from the server without issues:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By ensuring that the JSON structure matches the expected C# object structure in terms of data types, we can avoid deserialization errors and facilitate smoother data communication between PHP and C# . Always remember to validate your JSON outputs, so they adhere to the specifications your C# code expects.



With these adjustments, you should be able to convert the PHP json_encode output into a usable C# object without issues. Happy coding!