Loop c# - use variable in textbox

Question

I made a loop:

for (int i = 0; i < sumUSERS; i++ )
{

principal.UserPrincipalName = "bn" + txtbox_cusnumber.Text + "." + txt_user1.Text;

}

In my Form i have Text boxes with the following names :

txt_user1
txt_user2
txt_user3

How can I set the value i in txt_user(i).text?

I hope my question is understandable.

Its not possible like that. you have to loop over all controls and check if that is Text Box. an example for looping over Checkbox : stackoverflow.com/questions/1788490/… — M.kazem Akhgary
– M.kazem Akhgary, Commented Sep 6, 2015 at 17:40
You can find controls within a container by name like this #MyContainer.Controls.Find("myControlName", true); — ne1410s
– ne1410s, Commented Sep 6, 2015 at 17:43

Sergey Kalinichenko · Accepted Answer · 2015-09-06 17:41:57Z

2

Make an array of the boxes, and use an index, like this:

var txt_user = new [] {txt_user1, txt_user2, txt_user3};
for (int i = 0; i < txt_user.Length ; i++ ) {
    principal.UserPrincipalName += "bn" + txtbox_cusnumber.Text + "." + txt_user[i].Text;
}

Note that I replaced = with +=, otherwise the text would be the same as if you used txt_user3 by itself (i.e. only the last assignment would stay).

answered Sep 6, 2015 at 17:41

Sergey Kalinichenko

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