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How to check and see if a string is all uppercase in c#


Posted Date: 04 May 2008    Resource Type: Code Snippets    Category: Validations
Posted By: Rekha        Member Level: Gold
Rating:     Points: 20



The following code sample helps to check and see if a string is all uppercase in c#. Pass the method a string, read the results (true/false). Need reference to System.Text.RegularExpressions Namespace

using System.Text.RegularExpressions;

public bool IsUppercase(string str) //string to check
{
bool upper; //to hold return value
string pattern = "[a-z]"; //variable to hold the search pattern
try
{
Regex AllCaps = new Regex(pattern);
if (AllCaps.IsMatch(str))
{
upper = false;
}
upper = true;
}
catch
{
upper = false;
}
return upper;
}



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