Find specific pattern in a string

[ksrajalakshmi@gmail.com]

Hai ,

in a textbox am having text as
"(20/100)+pay1*pay2" .it's a formula. and stored in a particular
variable.
string strformula="(20/100)+pay1*pay2" ;

i've to substitute the value of the variable 'pay1' & 'pay2' and
finding the value of that strformula.
can any onr tell me how to find 'pay1' and 'pay2' in the variable
strformula. it's urgent and reply immediately.
Thanks in advance.

[Cor Ligthert [MVP]]

Re: Find specific pattern in a string

Hi,

I would use expect

string strformula = "(20/100)+pay1*pay2" .Replace("pay1" ,"Whatever" ;
strformula = strformula.Repl ace("pay2",What ever");

However this is a VBNet newsgroup, so next time please in VBNet language
code

I hope this helps,

Cor

[ksrajalakshmi@gmail.com]

Re: Find specific pattern in a string

am using c#.net. however, i converted that formula to value. am getting


"(20/100)+2323.56*43 54.56".

if i've to get the value in double. how to proceed?

[Cor Ligthert [MVP]]

Re: Find specific pattern in a string

Ksrajalak,
[color=blue]
> am using c#.net. however, i converted that formula to value. am getting[/color]

Why are you than asking questions in a VB.Net newsgroup.

Maybe you trust us more, however we are sure that the ones in the C#
newsgroup can answer your question as well. That I answered, was already
wrong.

That can give problems for persons who are searching this newsgroup.

Therefore please ask this question in the newsgroup with almost the same
name as this however than at the end Csharp

Thanks,

Cor

[Cerebrus99]

Re: Find specific pattern in a string

He He ! There you have it ! Mr. Ligthhert is a strict taskmaster ! ;-)

[Herfried K. Wagner [MVP]]

Re: Find specific pattern in a string

<ksrajalakshmi@ gmail.com> schrieb:[color=blue]
> am using c#.net. however, i converted that formula to value. am getting
>
> "(20/100)+2323.56*43 54.56".
>
> if i've to get the value in double. how to proceed?[/color]

MathLib
<URL:http://www.palmbytes.d e/content/dotnet/mathlib.htm>

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/>

[Homer J Simpson]

Re: Find specific pattern in a string


<ksrajalakshmi@ gmail.com> wrote in message
news:1139642314 .576198.28610@g 44g2000cwa.goog legroups.com...[color=blue]
> Hai ,
>
> in a textbox am having text as
> "(20/100)+pay1*pay2" .it's a formula. and stored in a particular
> variable.
> string strformula="(20/100)+pay1*pay2" ;
>
> i've to substitute the value of the variable 'pay1' & 'pay2' and
> finding the value of that strformula.
> can any onr tell me how to find 'pay1' and 'pay2' in the variable
> strformula. it's urgent and reply immediately.[/color]

In VB,

Private Sub Button1_Click(B yVal sender As System.Object, ByVal e As
System.EventArg s) Handles Button1.Click
Dim pay1 As Double, pay2 As Double
Dim MySrc As String
pay1 = 2323.56
pay2 = 4354.56
MySrc = TextBox1.Text
MySrc = Replace(MySrc, "pay1", pay1.ToString)
MySrc = Replace(MySrc, "pay2", pay2.ToString)
TextBox2.Text = MySrc
End Sub

will do the replacement. However calculating the value is a whole other
ballgame. This is "evaluating the expression" and is a well known problem in
computer science. It is not trivial. Why don't you use Excel instead?