Click here to Skip to main content
15,887,027 members
Search within:


how can i select one of a textbox from 10 textbox by random function?
Please Sign up or sign in to vote.
0.00/5 (No votes)
See more:
C#
How can I select one of a textbox from 10 textbox by random function?
Posted
Updated 8-Jan-11 2:25am
Add a Solution
Comments
Dalek Dave 8-Jan-11 8:26am    
Minor Edit for Grammar.

2 solutions

The obvious solution:
Generate a random number between 1 and 10 (or 0 and 9) using Random.Next[^], after that switch by generated number and call Focus[^] or Select[^] method for the chosen TextBox.

[TIP]
If you keep your TextBox references in array or list the switch statement will be replaced with a one-line indexing in that array. :)
[/TIP]
 
Share this answer
 
Posted
Updated 7-Jan-11 23:07pm
v4
Comments
Dalek Dave 8-Jan-11 8:26am    
Yep, that's how I would do it.
C#
private Random rnd = new Random();
        private void SelectTextBox()
        {
            int i = rnd.Next(1, 10);
            foreach (Control c in this.Controls)
            {
                if (c is TextBox && c.Name == "textBox" + i.ToString())
                {
                    c.Select();
                    break;
                }
            }
        }
 
Share this answer
 
Posted
Updated 7-Jan-11 22:44pm
v3
Comments
Nuri Ismail 8-Jan-11 4:42am    
Actually rnd.Next(10) will return a value in interval [0, 9] but the default names for textboxes start with number 1 (i.e. textBox1) therefore I think that "textBox" + i.ToString() is not very appropriate in this case (what if the value of i is 0?). Also, what if there are more textboxes and these that will get the random focus are not the first ones added to the form? I know that the OP was not specific and for a general question of this type I believe a general answer suits better, but that is a matter of taste. :)

Best Regards,
Nuri
jerrykid 8-Jan-11 4:44am    
Hi Nuri, thanks, I updated :)
ely z 8-Jan-11 5:09am    
thanks but where add this code
jerrykid 8-Jan-11 5:10am    
Add inside the class, e.g: public class A{//My code here}
Dalek Dave 8-Jan-11 8:26am    
Good Answer.
Add a Solution

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

  Print Answers RSS
Top Experts
Last 24hrsThis month
Related Questions
select one of the textboxes and change its color
How to randomly fire at a 10 by 10 grid?
clear all textboxes except one.
Select text inside textbox, ctrl+c and send to clipboard
textbox values getting one by one using arraylist
Clear all textboxes in form with one Function
how can we find all textbox control in one function
how to apply one function to many textboxes?
How can I limit the type of characters to enter in a textbox
Adding one textbox value to another textbox

Advertise
Privacy
Cookies
Terms of Use
Last Updated 8 Jan 2011
Layout: fixed | fluid
Copyright © CodeProject, 1999-2024
All Rights Reserved.

Web03 2.8:2024-04-02:1

CodeProject, 20 Bay Street, 11th Floor Toronto, Ontario, Canada M5J 2N8 +1 (416) 849-8900