CODEWITHSUNDEEP
vb.net
Ses Manijak
Ses Manijak

Reputation: 133

Execute code block certain number of times

So i want to perform some code N times. N is textbox's value (e.g: 12).

I have no idea how to accomplish this, but something like this is on my mind:

For Each i as 1 in textbox1.text
  'some code
Next

or

dim num1 as integer = 0
While num1 < textbox1.text
  'some code
  num1 += 1
Next

Those were just some ideas that were on my mind when i though about this question, none of above is tested nor tried to code.

Any ideas?

Upvotes: 2

Views: 766

Answers (3)

codiee
codiee

Reputation: 31

This might work, I haven't tried:

Dim repeat_times as Integer = 0
    Do Until repeat_times = 10 'times you want to repeat
    repeat_times = repeat_times + 1
    Console.WriteLine("Hello World") 'or anything you want
    Loop

Upvotes: 0

Ňɏssa P&#248;ngjǣrdenlarp
Ňɏssa P&#248;ngjǣrdenlarp

Reputation: 38875

First and foremost, turn on Option Strict. This will save you time in the long run by converting possible runtime errors into compiler errors. At the top of the code file:

Option Strict On

It can also be set for the entire project:
Project Properties -> Compile Tab -> Option Strict selector: On

You can also make it the default for all new projects via:
Tools -> Options -> Projects and Solutions -> VB Defaults

What it Does

TextBox.Text always contains text (hence the clever names). "12" is just a string and is not the same as 12. So, before you can use it, you need to convert from string to integer. Note: If you want to restrict user input to numbers consider using a NumericUpDown.

There are several ways to convert, but considering that the data comes from a user, we have to allow that they may enter "I like pie" instead of numerals. So, we want to use the safest method which in this case is Integer.TryParse:

' declare int var to hold the result
Dim LoopCount As Integer
If Integer.TryParse(TextBox132.Text, LoopCount) Then
    ' success!  LoopCOunt contains the integer value of the Text control

    For n As Integer = 0 To LoopCount - 1
       ' some code to do something
    Next
Else
    ' failed - scold the user with a MessageBox
End if

The comments in the code explain, but first you declare an integer variable to hold the converted value. Integer.TryParse is a function which will return True/False. If it succeeds, your variable will hold the integer value.

See Converting DataTypes for Option Strict for other convert methods and cases where they are appropriate.

Upvotes: 3

Ses Manijak
Ses Manijak

Reputation: 133

For n As Int32 = 0 To TextBox1.text - 1 was an answer for my question.

Upvotes: -1

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