I have a form which has a Combo Box Control. I have selected the drop down style property to DropDown. I have also set the DropDown Width to 250.
I have set the auto complete mode to suggest and the auto complete source to listitems.
it works absolutely fine when i click on the drop down. but when i type in somethin, the auto complete mode activates a drop down which has a small width.
any help appreciate.
i wanna know how to increase the width of the auto complete drop down via code so that the list items are viewed properly.
I am using C#
Yes, this is by design. ComboBox uses the SHAutoComplete API function to implement the autocomplete feature. Note the declaration, the function takes a handle to the text box portion of the ComboBox. As such, it has no idea that it is actually providing autocomplete info for a ComboBox instead of a TextBox. Accordingly, there is nothing it can do to compensate for the non-standard dropdown width you use.
Well, that explains why it doesn't work. Fixing it is technically possible but quite ugly. You would have to run code in the KeyUp event and use EnumTheadWindows() to find the autocomplete window handle. Then you can use SetWindowPos() to make it larger. There is already code similar to this in ComboBox.cs (AutoCompleteDropDownFinder.FindDropDowns), use the Reference Source or Reflector to help you get this right. Good luck!
EDIT:
I removed my first suggestion to come up with a new link:
Actually its possible to control the width of the Autocomplete dropdown box, but its a little bit tricky and involves using win API extensively ...
Combobox too small when doing Suggest
Maybe this article that I wrote on Codeproject might help you in relation to the combo-dropdown boxes and a way that I hacked this...
Related
Sorry but I am a newbie to WPF, I would really appreciate if you could help me-
Tag 1 in pic- Which control can I use to create a menu similar to that in the picture ? The closest I came was using a gridview within a listview but that ends up using a header for the gridview. Normal listview just highlights the entire strip and doesn't look good at all.
Tag 2 in pic // (No longer relevant, sorry)
Edit:
Looking for something simple like when using gridview with listview (as in pic below) there is automatically that standard window gradient & bevel effect etc. (As an idea, implementing it with buttons seems to cumbersome, first strip button border, then create all these effects.) So essentially anything already inbuilt in WPF.
Thanks for any help :-D !!!
ListBox or ListView are good controls to use. If it's just the 'pretty' factor you don't like, you can provide Templates to change the appearance. But functionally, ListBox and ListView provide the function of that menu.
When working with WPF, that should be your primary motivation when choose controls. What FUNCTIONS the way you want. You can always make it LOOK different with Templates, but getting the right FUNCTION is the primary goal for the control.
I came across a tutorial and some example code for an audio converter. You select the format you want to convert to from a drop down, and when you do all sorts of options appear in a previously blank area, different options based on the format you choose. It's called Audio Converter .NET and is from same author as Audio CD Ripper .NET. I can't find the tutorial, but here is a screenshot.
See how on the right there is extra controls that are not on the left. I was experimenting trying to add another category. I added it to the dropdown, but am unsure how to make it so certain fields come up when it is selected.
I understand that they create those controls for those items, but I don't see how they call the correct one when the combo box selects something. I see controls are created, but if I try to duplicate the controls into another entry in the combo box they don't show up for either the new or old one I was duplicating from.
What's the best way to go about achieving something like this?
Thanks
The easiest way is to create the controls needed for every option in the dropdown inside a panel, and simply turn it's visibility property from false to true whenever it's corresponding option is selected using the combobox's SelectedIndexChanged event handler. (And don't forget to turn the current visible panel's visibility to false)
is there a simple way to set the tooltip property of a listview item to be a balloon? Typically all i would do is:
Tooltip tt = new Tooltip("This is a tooltip");
tt.isBalloon = true;
but how do i do this for a listview item
You can manually show ToolTip when mouse is over certain item
check this article
There isn't an easy way to change the tooltip on a ListView. See this blog for a detailed explanation of why.
ObjectListView -- an open source wrapper around a standard WinForms ListView -- does a reasonable amount of work for you so that you can show enhanced tool tips with minimal effort on your part.
Even if you don't want to use ObjectListView, you can still look at the code to see how it is done (admittedly, in the case of tool tips, there was a lot of work done and it would be tricky to extract that work into another project)
I have what I consider to be a pretty unique problem here, and no idea how to implement. From what I've seen, there is no documentation, tutorials, samples and/or articles on this. I've spent weeks researching, with nothing to show.
The problem:
I need the user to be able to select the contents of a Label Control at runtime, and edit it.
If this can be done by extending the existing Label control, great! Or, if this requires a whole new Label Control to be created, fine. So be it.
Using a TextBox is not an option I'm afraid.
Any help at all is greatly appreciated!
Thank you,
jase
If it's just because a look & feel issue you can make a TextBox control look the same as a label would looks like (just guessing since I can't imagine any reason for not using a TextBox).
Could you pop up a window with a text box in it and then have them edit it there, then set the text property of the label based on the edited text box or do you need to edit it in place? You can set the label text at runtime, but for user input you will have to use a text box.
Im trying to emulate a 'find as you type' function like that of the address bar ("awesome bar") in FireFox. I want a suggestion box to appear below a textbox, and the suggestion box contains strings that contain what is in the textbox. I looked at the autocomplete feature of a normal WinForms textbox, but it seems to only search the beginning of the strings.
Has anyone here built or have experience with implementing something like this?
edit:
Some clarification- It is a WinForms project.
It needs to search inside a string, not just the beginning (which is what a normal textbox does if i recall correctly). And the suggestions should be displayed in a popup like a textbox autocomplete.
You need to handle the TextChanged event for your text entry field, and when the text changes, start a new thread running that will apply the new search. If the text changes before you get your results back, just kill the thread. If the thread returns results in time, display them.
You can get slightly more advanced (e.g. wait for a short time after the text changes so that the user can type a word without you triggering off loads of useless threads) but essentially that's it.
There was a discussion earlier on this topic where the author concluded that you are better off doing the whole thing yourself.
How can I dynamically change auto complete entries in a C# combobox or textbox?
I did something vaguely similar, but more like the iTunes® search box than the Awesomebar. My control used the textbox to actively filter a grid; so it wasn't for autocompletion.
...but... basically I had a DataView of all eligible items, whenever the TextBox's Text changed I'd update the Filter to hide all non-matching items. It worked well and might suit your needs for filtering the data--but not sure how to go about using it as an AutoComplete source for the textbox.
I have done such a thing for an app of mine not too much time ago.
What I did is make my search function in a new thread, so every time I typed a new letter, it called the search function in another thread, so I could keep on typing.
I can post some code if you need, but this should be enough to get you started. :)
Hemmed and hawed about deleting this after I noticed the OP edit mentioned winforms, but I think it'll be useful to anyone who comes here looking for the same but for asp.net apps.
Just because nobody has mentioned it yet, for a webforms app you absolutely want to do this with ajax (.net controls or pure JS, your choice). The feature is often called "autocomplete" and the one thing you don't want it to be breaking the seamlessness by making server round trips at the page level.
I suggest you look at this and this.
I've used Search As You Type in C# and How do I make a Textbox Postback on KeyUp?
Basically you use the keyup action to call a postback thats attached to the trigger to the update panel. then you do your update in the textbox_changed event with the dataview or whatever your backend looks like.