Is there such a thing as a CONTAINS for a string variable in VB.NET? For
instance, I want to do something like the following:
If strTest Contains ("A","B", "C") Then
Debug.WriteLine ("Found characters")
Else
Debug.WriteLine ("Did NOT find characters!")
End If 17 8117
Is String.IndexOfA ny() what you are looking for?
"Tom" <to*@nospam.com > wrote in message
news:Oe******** ******@TK2MSFTN GP11.phx.gbl...
Is there such a thing as a CONTAINS for a string variable in VB.NET? For
instance, I want to do something like the following:
If strTest Contains ("A","B", "C") Then
Debug.WriteLine ("Found characters")
Else
Debug.WriteLine ("Did NOT find characters!")
End If
Tom,
As Shiva suggests, you can use String.IndexOfA ny, something like: If strTest.IndexOf Any("ABC".ToCha rArray) <> -1 Then Debug.WriteLine ("Found characters") Else Debug.WriteLine ("Did NOT find characters!") End If
Or
If strTest.IndexOf Any(New Char() {"A"c, "B"c, "C"c}) <> -1 Then
NOTE: "A"c is a char literal, while "A" is a string literal.
Depending on how often I was using the above, I would consider making the
char array Static to the routine.
Static anyOf() As Char = New Char() {"A"c, "B"c, "C"c}
If strTest.IndexOf Any(anyOf) <> -1 Then
Hope this helps
Jay
"Tom" <to*@nospam.com > wrote in message
news:Oe******** ******@TK2MSFTN GP11.phx.gbl... Is there such a thing as a CONTAINS for a string variable in VB.NET? For instance, I want to do something like the following:
If strTest Contains ("A","B", "C") Then Debug.WriteLine ("Found characters") Else Debug.WriteLine ("Did NOT find characters!") End If
Shiva: Yes, that works for CHARACTERs, but not for strings. I probably
should have made my example
as such:
strTest = "The cat jumped over the sleepy dog."
If strTest Contains ("cat","dog" , "sleep") Then
Debug.WriteLine ("Found strings")
Else
Debug.WriteLine ("Did NOT find strings!")
End If
I -could- write my own function easily enough for this, but it seems like
the framework should have a similar string function somewhere.
Tom
"Shiva" <sh******@onlin e.excite.com> wrote in message
news:uj******** ******@TK2MSFTN GP11.phx.gbl... Is String.IndexOfA ny() what you are looking for?
"Tom" <to*@nospam.com > wrote in message news:Oe******** ******@TK2MSFTN GP11.phx.gbl... Is there such a thing as a CONTAINS for a string variable in VB.NET? For instance, I want to do something like the following:
If strTest Contains ("A","B", "C") Then Debug.WriteLine ("Found characters") Else Debug.WriteLine ("Did NOT find characters!") End If
Tom,
You cannot, you should or use a Regex or use a loop with the normal indexof
Where the performance decission when to use the regex is in my opinion about
20 words to search for.
Cor
Tom,
I think you are going to have to create your own routine...
I would consider using a RegEx in that routine.
Const pattern As String = "cat|dog|sl eep"
Static theRegEx As New System.Text.Reg ularExpressions .Regex(pattern,
Text.RegularExp ressions.RegexO ptions.Compiled )
If theRegEx.IsMatc h(strTest) Then
Debug.WriteLine ("Found strings")
Else
Debug.WriteLine ("Did NOT find strings!")
End If
Of course if "cat","dog" , "sleep" are dynamic, you could build the pattern
with String.Join:
Dim pattern As String = String.Join("|" , New String() {"cat", "dog",
"sleep"})
If System.Text.Reg ularExpressions .Regex.IsMatch( pattern, strTest)
Then
Which I used would depending on the whether or not the strings I was looking
for were static or dynamic & how often the routine was being called...
Hope this helps
Jay
"Tom" <to*@nospam.com > wrote in message
news:%2******** ********@TK2MSF TNGP11.phx.gbl. .. Shiva: Yes, that works for CHARACTERs, but not for strings. I probably should have made my example as such:
strTest = "The cat jumped over the sleepy dog." If strTest Contains ("cat","dog" , "sleep") Then Debug.WriteLine ("Found strings") Else Debug.WriteLine ("Did NOT find strings!") End If
I -could- write my own function easily enough for this, but it seems like the framework should have a similar string function somewhere.
Tom
"Shiva" <sh******@onlin e.excite.com> wrote in message news:uj******** ******@TK2MSFTN GP11.phx.gbl... Is String.IndexOfA ny() what you are looking for?
"Tom" <to*@nospam.com > wrote in message news:Oe******** ******@TK2MSFTN GP11.phx.gbl... Is there such a thing as a CONTAINS for a string variable in VB.NET? For instance, I want to do something like the following:
If strTest Contains ("A","B", "C") Then Debug.WriteLine ("Found characters") Else Debug.WriteLine ("Did NOT find characters!") End If
Doh!, Dim pattern As String = String.Join("|" , New String() {"cat", "dog", "sleep"}) If System.Text.Reg ularExpressions .Regex.IsMatch( pattern, strTest)
Reversed the patterns, it should be:
If Regex.IsMatch(s trTest, pattern) Then
Jay
"Jay B. Harlow [MVP - Outlook]" <Ja************ @msn.com> wrote in message
news:ux******** ******@tk2msftn gp13.phx.gbl... Tom, I think you are going to have to create your own routine...
I would consider using a RegEx in that routine.
Const pattern As String = "cat|dog|sl eep" Static theRegEx As New System.Text.Reg ularExpressions .Regex(pattern, Text.RegularExp ressions.RegexO ptions.Compiled ) If theRegEx.IsMatc h(strTest) Then Debug.WriteLine ("Found strings") Else Debug.WriteLine ("Did NOT find strings!") End If
Of course if "cat","dog" , "sleep" are dynamic, you could build the pattern with String.Join:
Dim pattern As String = String.Join("|" , New String() {"cat", "dog", "sleep"}) If System.Text.Reg ularExpressions .Regex.IsMatch( pattern, strTest) Then
Which I used would depending on the whether or not the strings I was looking for were static or dynamic & how often the routine was being called...
Hope this helps Jay "Tom" <to*@nospam.com > wrote in message news:%2******** ********@TK2MSF TNGP11.phx.gbl. .. Shiva: Yes, that works for CHARACTERs, but not for strings. I probably should have made my example as such:
strTest = "The cat jumped over the sleepy dog." If strTest Contains ("cat","dog" , "sleep") Then Debug.WriteLine ("Found strings") Else Debug.WriteLine ("Did NOT find strings!") End If
I -could- write my own function easily enough for this, but it seems like the framework should have a similar string function somewhere.
Tom
"Shiva" <sh******@onlin e.excite.com> wrote in message news:uj******** ******@TK2MSFTN GP11.phx.gbl... Is String.IndexOfA ny() what you are looking for?
"Tom" <to*@nospam.com > wrote in message news:Oe******** ******@TK2MSFTN GP11.phx.gbl... Is there such a thing as a CONTAINS for a string variable in VB.NET? For instance, I want to do something like the following:
If strTest Contains ("A","B", "C") Then Debug.WriteLine ("Found characters") Else Debug.WriteLine ("Did NOT find characters!") End If
"Tom" <to*@nospam.com > schrieb: Is there such a thing as a CONTAINS for a string variable in VB.NET? For instance, I want to do something like the following:
If strTest Contains ("A","B", "C") Then Debug.WriteLine ("Found characters") Else Debug.WriteLine ("Did NOT find characters!") End If
For reasons of readability, I prefer this solution:
\\\
Dim s As String = _
"Quidquid id est timeo Danaos et dona ferentes."
If _
InStr(s, "Quidquid") AndAlso _
InStr(s, "timeo") AndAlso _
InStr(s, "dona") _
Then
MsgBox("True")
Else
MsgBox("False")
End If
///
--
Herfried K. Wagner [MVP]
<URL:http://dotnet.mvps.org/>
Herfried,
You raised an interesting question. Does Tom want to know if strTest
contains all three or one of?
Its harder with RegEx to check to see if it contains all three...
Wondering
Jay
"Herfried K. Wagner [MVP]" <hi************ ***@gmx.at> wrote in message
news:OD******** ******@TK2MSFTN GP12.phx.gbl... "Tom" <to*@nospam.com > schrieb: Is there such a thing as a CONTAINS for a string variable in VB.NET? For instance, I want to do something like the following:
If strTest Contains ("A","B", "C") Then Debug.WriteLine ("Found characters") Else Debug.WriteLine ("Did NOT find characters!") End If
For reasons of readability, I prefer this solution:
\\\ Dim s As String = _ "Quidquid id est timeo Danaos et dona ferentes." If _ InStr(s, "Quidquid") AndAlso _ InStr(s, "timeo") AndAlso _ InStr(s, "dona") _ Then MsgBox("True") Else MsgBox("False") End If ///
-- Herfried K. Wagner [MVP] <URL:http://dotnet.mvps.org/>
Jay,
"Jay B. Harlow [MVP - Outlook]" <Ja************ @msn.com> schrieb: You raised an interesting question. Does Tom want to know if strTest contains all three or one of?
First I tested if 'String' contains a 'Contains' method, but it doesn't
contain such a method.
BTW: My solution can be simply adapted by replacing 'AndAlso' with 'OrElse'
in order to check for the occurance of one (or more) of the substrings in
the string.
Its harder with RegEx to check to see if it contains all three...
Especially for longer strings, the way I propagate may be inefficient, but I
don't know how Regex is implemented...
Wondering too...
--
Herfried K. Wagner [MVP]
<URL:http://dotnet.mvps.org/> This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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