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How can I make the first character of a string lowercase?
For example: ConfigService
And I need it to be like this: configService
760
To capitalize the first letter of a string and lowercase the rest, use the charAt() method to access the character at index 0 and capitalize it using the toUpperCase() method. Then concatenate the result with using the slice() method to to lowercase the rest of the string.
In cell B2, type =PROPER(A2), then press Enter. This formula converts the name in cell A2 from uppercase to proper case. To convert the text to lowercase, type =LOWER(A2) instead.
The tolower() function takes an uppercase alphabet and convert it to a lowercase character. If the arguments passed to the tolower() function is other than an uppercase alphabet, it returns the same character that is passed to the function. It is defined in ctype.
In C#, the Toupper() function of the char class converts a character into uppercase. In the case that we will be discussing, only the first character of the string needs to be converted to uppercase; the rest of the string will stay as it is.
This will work:
public static string? FirstCharToLowerCase(this string? str)
{
if ( !string.IsNullOrEmpty(str) && char.IsUpper(str[0]))
return str.Length == 1 ? char.ToLower(str[0]).ToString() : char.ToLower(str[0]) + str[1..];
return str;
}
(This code arranged as "C# Extension method")
Usage:
myString = myString.FirstCharToLowerCase();
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