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

Question

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.

Avnish Kumar · 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 Shethiya · Answer

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 Kumar · Answer

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 Hawaldar · Answer

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); } }