How to do If Statement to detect multiple words in a string?

Lia Meeds

private void ButtonCheck_Click(object sender, EventArgs e)

{

string s = textBoxMessage.Text;

if (s.Contains("FREE") == true)

{

MessageBox.Show("Its not a SPAM", "SMS SPAM DETECTION TOOL | KEYWORD", MessageBoxButtons.OK, MessageBoxIcon.Information);

}

else if (s.Contains("GET") == true)

{

MessageBox.Show("Its a SPAM", "SMS SPAM DETECTION TOOL | KEYWORD", MessageBoxButtons.OK, MessageBoxIcon.Information);

}

else

{

MessageBox.Show("Its not a SPAM", "SMS SPAM DETECTION TOOL", MessageBoxButtons.OK, MessageBoxIcon.Information);

}

}

I dont know how to detect multiple words in a sentence.

4 Replies

Know the answer? Post it — somebody with the same question will find it here.

Avnish Kumar6y ago
Accepted answer
You have to create a Extensionsmethod for string class that should work for you.
Extensions Method:-
public static class StringExtensions
   {
       public static bool Contains(this string str, string[] substring,
                                   StringComparison comp = StringComparison.OrdinalIgnoreCase)
       {
           if (substring == null)
               throw new ArgumentNullException("substring", "substring cannot be null.");
           else if (!Enum.IsDefined(typeof(StringComparison), comp))
               throw new ArgumentException("comp is not a member of StringComparison", "comp");
           foreach (var item in substring)
           {
               if (str.IndexOf(item, comp) >= 0)
                   return true;
           }
           return false;

       }
   }
private void ButtonCheck_Click(object sender, EventArgs e)
        {
            string s = textBoxMessage.Text;
            string[] SpamKeywords = { "Spam", "Free", "Trial" };
            string[] NotSpamKeywords = { "Get", "Tool", "SMS" };
            if (s.Contains(NotSpamKeywords))
            {
                MessageBox.Show("Its not a SPAM", "SMS SPAM DETECTION TOOL | KEYWORD", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
            else if (s.Contains(SpamKeywords))
            {
                MessageBox.Show("Its a SPAM", "SMS SPAM DETECTION TOOL | KEYWORD", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
            else
            {
                MessageBox.Show("Its not a SPAM", "SMS SPAM DETECTION TOOL", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }
Jaimin Shethiya6y ago
Hello Lia,

Can you please try to below code.

private void ButtonCheck_Click(object sender, EventArgs e)
{
string s = textBoxMessage.Text;
var lst = AddData();
var isExists = lst.Any(x => x.Equals(s, StringComparison.InvariantCultureIgnoreCase));
if (isExists == true)
{
MessageBox.Show("Its not a SPAM", "SMS SPAM DETECTION TOOL | KEYWORD", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else
{
MessageBox.Show("Its not a SPAM", "SMS SPAM DETECTION TOOL", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
private List AddData()
{
return new List
{
"FREE",
"GET"
};
}
let me know if you doubt in this code.

Thanks.
Jignesh Kumar6y ago
Hi Lia Meeds,

You can split your input string into words and loop through using foreach loop. Please use below link,
https://www.baeldung.com/string-contains-multiple-words
Rajanikant Hawaldar6y ago
Hello Lia, Please check the below code,
private void ButtonCheck_Click(object sender, EventArgs e)
{
   string s = textBoxMessage.Text;
   string[] myStrings = s.Split(' ');

   if (myStrings.Distinct().Count() != myStrings.Count())
   {
       //This condition detect multiple words in a string
        // Show message / write your code here
   }
   if (s.Contains("FREE") == true && s.Contains("GET") == true)
   {
       // write your code
   }
   else if (s.Contains("FREE") == true)
   {
         MessageBox.Show("Its not a SPAM", "SMS SPAM DETECTION TOOL | KEYWORD", MessageBoxButtons.OK, MessageBoxIcon.Information);
   }
   else if (s.Contains("GET") == true)
   {
         MessageBox.Show("Its a SPAM", "SMS SPAM DETECTION TOOL | KEYWORD", MessageBoxButtons.OK, MessageBoxIcon.Information);
   }
   else
   {
         MessageBox.Show("Its not a SPAM", "SMS SPAM DETECTION TOOL", MessageBoxButtons.OK, MessageBoxIcon.Information);
   }
}