How to Handle Empty Strings When Parsing Integers in C#?

Handling Empty String in int.Parse

When attempting to parse an empty string using int.Parse, an Input string was not in a correct format exception is thrown. This article addresses this issue and provides solutions to handle empty strings gracefully.

To default to 0 when the text is empty, the following code snippet can be used:

int i = string.IsNullOrEmpty(Textbox1.Text) ? 0 : int.Parse(Textbox1.Text);

This checks if the textbox is empty and returns 0 if it is, otherwise it parses the text and returns the integer value.

For a more concise approach, the following code snippet can be used:

int i;
if (!int.TryParse(Textbox1.Text, out i)) i = 0;

This code attempts to parse the text and assigns the value to i. If parsing fails, i is set to 0.

These solutions effectively handle empty strings and provide a robust way to parse input.

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