Event for TextBox AutoComplete changed

Question

I have two textboxes in my windows form named txtUserName and txtPassword, now I'm populating the txtUserName using the code

AutoCompleteStringCollection myCollection = new AutoCompleteStringCollection();
_userEMailList = UserCredentials.GetUserEmails();

foreach (var item in _userEMailList)
{
    myCollection.Add(item);
}

txtUserName.AutoCompleteCustomSource = myCollection;

where UserCredentials.GetUserEmails() method returns a List<string>.

Now the user will get suggestions and thus can select from one of the options.

So my problem is that when the user selects from one of the suggestion, the value of txtPassword should auto-fill. I have a method which takes EMail-ID as a parameter and returns the password. In web application, we can use onblur but as my code is part of a windows application, so JavaScript usage is not possible.

Can you check this link : https://stackoverflow.com/questions/15336928/textbox-events-in-c-sharp — Sujith, Jul 24 '17 at 07:54

score 2 · Accepted Answer · answered Jul 24 '17 at 07:49

2

You should just check for a press of Enter. Selecting an item from autocomplete with the mouse will also trigger this:

private void txtUserName_KeyDown(object sender, KeyEventArgs e) 
{
    if (e.KeyData == Keys.Enter) 
    {
        this.txtPassword.Text = GetPassword(this.txtUserName.Text);
    }
}

answered Jul 24 '17 at 07:49

Romano Zumbé

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This method is not triggered in any of the cases mentioned. – JDK Jul 24 '17 at 08:06
But you did assign it to the event of the `TextBox`, right? – Romano Zumbé Jul 24 '17 at 08:07
No. I'm new to C# so still figuring out how to do tasks. Now I got why you asked if I wrote that code or not :) – JDK Jul 24 '17 at 08:28
Ok, then in your designer select the `txtUserName` TextBox and got to events and set `KeyDown` event to this method. – Romano Zumbé Jul 24 '17 at 08:29

Event for TextBox AutoComplete changed

1 Answers1