Скачать или смотреть How to Parse a String Message into an Entity in .NET

Learn how to efficiently parse a string message with specific key-value patterns into a .NET entity class, such as Order. Follow our step-by-step guide to achieve this without extensive loops!
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This video is based on the question https://stackoverflow.com/q/64592375/ asked by the user 'Gabriel Guedes' ( https://stackoverflow.com/u/11792379/ ) and on the answer https://stackoverflow.com/a/64592720/ provided by the user 'Marc Gravell' ( https://stackoverflow.com/u/23354/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Parsing a String Message into an Entity in .NET

In the world of software development, especially in .NET, we often face the challenge of transforming data from one format to another. One common task is parsing a string with key-value pairs into an object, or entity, that we can work with in our application. If you've ever found yourself with a string formatted like this:

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and wanted to convert it into a structured Order entity, you're in the right place. Let’s break down how to take this string and parse it into the corresponding properties of an Order object in .NET.

Understand the Problem

We have a class named Order, which looks something like this:

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In our case, each property of the Order class corresponds to numbers in the string. Here’s the mapping:

8 = Account

5 = Type

88 = Status

39 = Something

The goal is to take the string and fill an instance of this Order class with the appropriate values without using complex looping concepts.

The Solution

To parse the string, we'll leverage the power of regular expressions in .NET. Below is a simple and efficient method to achieve this.

Step-by-Step Process

Setup Your Project: Ensure you have a .NET project set up with the necessary using directives:

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Create the Main Method: Develop your main method like this:

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Use Regular Expressions to Match Keys and Values: This is the critical part where we’ll use regex to extract key-value pairs from the string:

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Output the Results: Once you have populated the Order object, you can print the properties for verification:

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Complete Code Example

Here’s the complete code for your reference:

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Conclusion

Parsing strings into entities doesn’t have to be a daunting task. By utilizing regular expressions, you can efficiently extract the required information without excessive looping. Remember that while you can theoretically avoid loops, practical applications usually benefit from straightforward and maintainable code.

Feel free to experiment and adapt this code to suit your specific needs in your projects!