![]() ![]() What happens if you provide something else than a number to the Parse-method: var i = int.Parse("Oh no") Īs expected, the Parse-method throws a FormatException. While Parse provides a nice and simple interface for converting strings to int, it's rarely the right method to use. The most common pattern I've seen in C# is using the Parse-method: var i = int.Parse("42") While working for multiple companies both as a permanent and as a freelancer, I've seen a thousand lines of code, converting between data types. Like parsing input from a text box in a system that didn't have modern model binding as we are used to today or when converting the output from a third-party API. You have already tried converting a string to an int. For today's post, I will show you the best ways of converting strings to integers in C#. Even worse, most examples lack key aspects like exception handling and bad practices. I found that when googling common terms like "convert string to int", "write to a file", and similar, I would often get outdated StackOverflow answers, showing how to solve each problem with. In this series, I try to provide updated answers for common. I hope this article helped you learn more about converting strings to ints in C#.Time for a new post in my how-to series. ![]() In this article, we saw some of the methods to convert a string to an integer in C# using the Parse(), TryParse(), and Convert() methods. ConclusionĬonverting a string to a number is a common task in programming, and C# provides various ways to accomplish this task. If the conversion fails, the success variable is set to false and the num variable is assigned its default value. The result is stored in the numvariable if the conversion is successful. In the above code, we tried to parse a string variable called numStringto an integer using the int.TryParse() method. Conversion successful, do something with num. If (int.TryParse(numString, out int num)) Here is an example: string numString = "12" This is the safest way of converting a string variable to an Integer. The result of the parsing is stored in an outparameter. This method takes in a string variable and an outparameter and returns a boolof value trueif the parsing is successful. How to Convert a String to an Int Using Int32.TryParse()Ĭompared to the int.Parse() method, int.TryParse() is a safer way to convert a string to a 32-bit signed integer. The Convert.ToInt32() method has two exceptions, FormatExceptionand OverflowExceptionand is able to convert a null variable to 0 without throwing an exception. We then use the Convert.ToInt32() method to convert this string to an integer and assign it to a variable named num. In the code block above, we have declared a string variable, numString, and assigned it a value. Here is an example: string numString = "123" This method takes a string variable as input and returns an integer. How to Convert a String to an Int Using Convert.ToInt32()Ĭonvert.ToInt32() is a static method provided by C# to convert a string to a 32-bit signed integer. Here is how to do this: string numString = "12" Īnother possible solution is using TryParse(), which we'll discuss below. To avoid this issue, you can use a try-catch block while using int.Parse(). The downside of using the int.Parse() method is that an exception will be thrown if it cannot be successfully parsed to an integer. The method takes a string variable called numberStringand converts it to an int. ![]() The above code shows how to convert a string to an Integer using the int.Parse() method. Here is an example: string numberString = “8” Int32.Parse() is the easiest way to convert a string to an integer. How to Convert a String to an Int Using Int32.Parse() You can convert a string to an Int using the following method. Int32is a built-in value type that represents a 32-bit signed integer. ![]() The Intkeyword is an alias for the System.Int32 type, and it is utilized for declaring variables that can hold 32-bit signed integers within the range of -2,147,483,648 to 2,147,483,647. Whether you are a beginner or an experienced programmer, this guide will provide a user-friendly introduction to the topic. This article will also provide examples to help you understand the syntax of each method. This article will explore some of the most common methods to convert a string to an integer in C# using the int.Parse(), int.TryParse(), and Convert.ToInt32() methods. Whether you are working with user input or data from an external source, converting a string to a number is a common task for developers. There are various situations where you need to convert a string to a number. ![]()
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