How Can I Perform Case-Insensitive String Comparisons in C#?

String beyond the sensitivity of the case comparison

In the field of string operation, the commonly used

method provides a direct method to determine whether a string exists in another string. However, in some cases, it is essential to not distinguish the size.

String.Contains The initial problem seeks a method that does not consider the string of the lowercase string. Although the solution that originally converted both string into uppercase may look awkward, it can use a more comprehensive method.

Use the powerful features of StringComparison

Enthusiastically provide an elegant solution for the comparison of the lower case. By passing as a parameter to the method, the expected results can be achieved.

StringComparison Use the expansion method expansion tool set StringComparison.OrdinalIgnoreCase IndexOf

In order to improve the readability of code and simplify the future use, it is beneficial to define a expansion method specifically used not to distinguish the comparison of the case.

string title = "ASTRINGTOTEST";
bool contains = title.IndexOf("string", StringComparison.OrdinalIgnoreCase) >= 0;

<方法> How to use

The extension method can be easily used to perform string comparisons that do not distinguish between lower and lower cases.

public static class StringExtensions
{
    public static bool Contains(this string source, string toCheck, StringComparison comp)
    {
        return source?.IndexOf(toCheck, comp) >= 0;
    }
}

By adopting these technologies, developers can satisfy applications that need to be flexible and do not distinguish between writing string comparison and effectively expand their tool sets to achieve efficient and detailed text operations.

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