vb.net - finding a substring in a string

[zion99]

Hi,
I m currently working in VB .NET 2003.
I have the following string:
sBIG = "A final Goodbye from Greats"
I need to find whether the above word contains any word say "from".

I could not find a method in VB.net that can provide me the result.
Thanks,

[TRScheel]

Hi,
I m currently working in VB .NET 2003.
I have the following string:
sBIG = "A final Goodbye from Greats"
I need to find whether the above word contains any word say "from".

I could not find a method in VB.net that can provide me the result.
Thanks,

I assume you want to check each word?

If so...

[code=vbnet]
For i As Integer = 0 To sBig.Split(" ").Length - 1 Step 1
If (sBig.Split(" ")(i).ToLower() .Contains("from ")) Then
Console.WriteLi ne("Word #{0} '{1}' Contains 'from'", i + 1, sBig.Split(" ")(i))
End If
Next
[/code]

[programmerboy]

I assume you want to check each word?

If so...

[code=vbnet]
For i As Integer = 0 To sBig.Split(" ").Length - 1 Step 1
If (sBig.Split(" ")(i).ToLower() .Contains("from ")) Then
Console.WriteLi ne("Word #{0} '{1}' Contains 'from'", i + 1, sBig.Split(" ")(i))
End If
Next
[/code]

I think he just wants to check word "from". You can just say

[CODE=vbnet]if (index = sBig.indexOf("f rom")) <> -1 then
//Do whatever you want to do
end if[/CODE]
indexOf returns -1 if the specified string is not found.

[TRScheel]

I think he just wants to check word "from". You can just say

[CODE=vbnet]if (index = sBig.indexOf("f rom")) <> -1 then
//Do whatever you want to do
end if[/CODE]
indexOf returns -1 if the specified string is not found.

Rereading his question, you may be right

[Plater]

If you don't care where in the string the word is, just if it exists or not you could use:

if (aBig.Contains("From"))
{//the word "From" appears in aBig
}

[zion99]

Thanks a lot for ur replies.
But I m afraid, i cud not find CONTAINS for STRING, it exist for STRINGCOLLECTIO N... :(

so i will be using the INDEX method. but even this method tells if there is an occurrence or not.

what if i want to know the TOTAL no. of occurrences of the word "FROM" in the statement ?
Thanks :)

[TRScheel]

Thanks a lot for ur replies.
But I m afraid, i cud not find CONTAINS for STRING, it exist for STRINGCOLLECTIO N... :(

so i will be using the INDEX method. but even this method tells if there is an occurrence or not.

what if i want to know the TOTAL no. of occurrences of the word "FROM" in the statement ?
Thanks :)

[code=cpp]
while(myString. IndexOf("from") != -1)
{
myString = myString.SubStr ing(myString.In dexOf("from"), myString.Length - myString.IndexO f("from"));
countOfFrom++;
}
[/code]

I didnt test this code, but it should work. If it gives you an array exception for going out of bounds, add a -1 to the final parameter on SubString

[OliveOyl3471]

Hi,
I m currently working in VB .NET 2003.
I have the following string:
sBIG = "A final Goodbye from Greats"
I need to find whether the above word contains any word say "from".

I could not find a method in VB.net that can provide me the result.
Thanks,

Here's one way that will work

        Dim sBIG As String = "A final Goodbye from Greats"
        Dim intIndex As Integer

        intIndex = sBIG.IndexOf("from", 0)

        If intIndex <> -1 Then
            lblDisplay.Text = "Your word is contained in this string"

        End If

this code will search for whatever word you put in the parentheses after IndexOf.
If the compiler doesn't find your word in the string, then it will assign a value of -1 to the variable intIndex.

It is case sensitive so you could convert it to upper if you need to search for a word that might or might not contain capital letters.

Now, do you know how to populate a two dimensional array from a text file?

p.s. I didn't see that others have already answered your question.