Listing Problem in AutoComplete Textbox Control

I am assumsing you meant ComboBox, not TextBox. Set comboBox1.MaxDropDownItems to number of items you want to be visible.

Goran

Hello biplavo,

It might not be the answer you want to read, but unfortunately it seems that there is no way to control the amount of items that are displayed.


Regards,

Dabas

If you are really in need for this functionality, you could create your own control that will have one TextBox and one ListBox, This way you can control the height of the listbox. From the first thought, I don't think it is hard to create such control.

Goran

Well, I don't believe you will find such a code on the web that implements such functionality, since it is quite uncommon demand. If you look at the programs like mozilla firefox, you will find that it also doesn't support what you are looking for (when typing web address), and its one of the best and most used browser. It is a common thing to expect from user to scroll down when list has more than a several items. What would you do if it has 100 items? You cant expect to show them all. And if you are going to use this control in commercial software, then you also need to think about the screen size and how many items can be shown to fit the screen. However if you do insist on the idea to make such a control then I suggest you start the project and ask when you get stuck somewhere. Here is what I think is needed:

1) You subscribe for one of the TextBox.KeyXXX event, where you will get the input from user and based on that input, you will filter your datasource that listbox is bound to (like datatable). If the items in listbox dont fit in listbox, then here is how you would resize it

http://windowsclient.net/blogs/faqs/archive/2006/05/30/how-do-i-set-the-width-of-a-listbox-to-fit-the-text.aspx

To set the height of the listbox you will multiply the item count with itemheight. You might need to add some pixels for the top and bottom borders width. Then you will make listbox visible to user.

2) If a match is found, you will show the whole listbox item text in your textbox, but you will select the part that is added to it, so when the user types further, it will erase the added text. This is not a hard thing to do, and involves a textBox Select method.

3) List is set invisible when user moves focus from textbox.

4) There is also a need for items in list to be selected when user moves mouse over it. This can easily be done with ListBox MouseMove event, where you will use ListBox IndexFromPoint method, which will retrieve index of the item that the mouse is over, and just pass this index to SelectedIndex property to select this item.

Of course, this doesn't cover all, but will get you started.

Goran

Ah, I forgot to add, when user clicks on some item in listbox, selected item's text is set in textbox, and listbox becomes invisible.

Goran

You are welcome.

Goran