handle this with our home-made autocomplete code below if the user uses the TextBox to enter text, InnerComboBox.SelectedValueChanged += new EventHandler(innerComboBox_SelectedValueChanged) handle this by mirroring it in the TextBox if the user uses the ComboBox to choose an item, Private string comboBoxItems = new string stores the items that are used for auto-complete Public partial class AutoCompleteTextBox : UserControl * 3) Use AddItem to add any additional strings * 2) Use SetItems to provide the list of strings used * using the Form Designer to resize/place the * 1) Drag onto a Form Designer using Visual Studio, * b) typing enough characters of the start of the * a) choosing from the drop-down combobox list * an item can be selected from the list either by: * whilst also providing auto-complete from a given * a text box which allows free-form entry of text □ The codeĭownload it here, but here is the interesting bit… using System So I figured that the quickest and easiest way to get the best of both worlds would be to have both. But it doesn’t have a drop-down list.ĬomboBox doesn’t let you programmatically alter selected text – it doesn’t have any of the Selection. TextBox lets you programmatically alter selected text – with attributes SelectionStart, SelectionLength and so on. This is normally done by highlighting the auto-completed text. (Otherwise, the interface is too unclear – a user wouldn’t know where their next key-press would go). I needed to be able to show the difference between the bit of the text that has been typed in manually, and the bit of the text that was provided by auto-complete. I made the TextBox slightly narrower than the ComboBox behind it, so that the drop-down arrow is still visible. It is a bit of a hack… I created a custom UserControl that contains both a ComboBox (to give me the drop-down list) with a TextBox directly in front of it (to give me the free-form text editing space). If there are 20 words beginning with ‘T’, pressing T then O is a quicker way to pick the item of the list which begins TO. Typing the first couple of letters of something is much quicker than getting out your stylus when filling in a form. ( Look at Treos – still one of the best examples of interfaces that can be used with one hand). to be able to type in the start of items on the list, and have auto-complete fill in the rest of the item for me (without needing to open the list)Īll of my PDAs have a full QWERTY keyboard.to be able to type in new items not on the list.a drop-down list that I can choose from with the stylus.using the keyboard allows new entries to be entered, ignoring the list.clicking on the drop-down arrow with the stylus provides a scrollable list to choose from.a drop down list of strings to choose from, allowing new items not already on the list to be entered – (using a ComboBox with a DropDownStyle of DropDown).pressing a key on the keyboard will cycle through all items in the list which begin with that first letter (if there are 20 words beginning with ‘T’, you need to press T fourteen times to get the fourteen item in the list).clicking on the control with the stylus provides a scrollable list to choose from.a drop down list of strings to choose from – (using a ComboBox with a DropDownStyle of DropDownList).To start with, a quick recap on what is provided, because you can get some things a bit similar: Read on to see what I mean, and how I did it. So, in the spirit of Hack Day ( which I’m still gutted to have missed!) I had a quick stab at throwing together something myself. I didn’t realise that until I wanted it for a Form I was throwing together tonight, but there you go. NET Compact Framework doesn’t support auto-complete in text entry controls.
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