This is probably something simple. The winforms combobox items by default can be edited by the user, how to disable this?
Set DropDownStyle = DropDownList.
Set the ComboBox.DropDownStyle to DropDownList.
ComboBox1.DropDownStyle = ComboBoxStyle.DropDownList;
Specifies that the list is displayed by clicking the down arrow and
that the text portion is not editable. This means that the user cannot
enter a new value. Only values already in the list can be selected.
Set the ComboBox style to ComboBoxStyle.DropDownList
Try setting the DropDownStyle property to DropDownList. Style of Simple makes it like a listbox, Combobox is what you are seeing allowing editing, and DropDownList only allows user to select.
two Method that help you Stop User to not Edit DropDownList:
A. using Programming code:
DropDownListName.DropDownStyle = ComboBoxStyle.DropDownList;\
B. using Design properties of Visual Studio
Set DropDownStyle = DropDownList.
I hope this well help you.
Related
I have a textBox set to ReadOnly and I want a similar look for my comboBox so that my User knows that this field can't be edited.
I tried setting Enabled to false but Client doesn't like its result due to poor readability.
textBox.ReadOnly = true; //readable
comboBox.Enabled = false //not readable
My goal is to replicate the style of the ReadOnly textBox into the comboBox's style.
One solution is to render the page based on the field's editability: If it is read only then create a read only textbox with the given value. If it is editable then create a normal combobox. This way only 1 value has to be rendered which may be beneficial for you as well!
The answer is given here:
Just change the DropDownStyle of the ComboBox from DropDown to DropDownList. It works very fine for me.
How to disable editing or hide text edit field, when DropDownStyle = Simple for Combo Box control?
MSDN on ComboBox.DropDownStyle:
The DropDownStyle property specifies whether the list is always displayed or whether the list is displayed in a drop-down. The DropDownStyle property also specifies whether the text portion can be edited.
Docs on ComboBoxStyle.Simple:
Specifies that the list is always visible and that the text portion is editable. This means that the user can enter a new value and is not limited to selecting an existing value in the list.
So, ComboBoxStyle.Simple suggests that list can be edited by user and it's confusing to disable edit with this DropDownStyle selected. Alternatives:
If you are ok with drop-down list use ComboBoxStyle.DropDownList
If you want to display a non-editable list with a view similar to ComboBoxStyle.Simple consider using ListBox
If you really need to achieve this effect on Combox you can just catch the events like "TextChanged" and then setting it back to "" and asking if (!comboBox1.DropDownStyle == ComboBoxStyle.Simple) before adding items to Items collection. Although it seems there are better ways to achive similar functionality using listbox as suggested before.
On a form, I have a default ComboBox, I have another button that allows user to add more ComboBoxes, however, when user adds new combobox dynamically, existing selected value in the default combo box changes, where as idea is however many ComboBoxes are added, every previously added ComboBox would not lose a selection if user has selected anything.
Can some one point in the right direction?
Thanks
You are not very clear on your problem, however I would suggest setting a new BindingContext to your Control, before adding it to the form.
Good luck.
I am using combobox (c# windows forms) to display the set of matching values from database on combobox, when user enters some text in combobox. I am not getting exact idea to write the code.
Any help is really appreciated..
A ComboBox already has an autocomplete feature. Have a look at these properties on MSDN:
AutocompleteMode and AutocompleteSource.
If you are willing to pay Telerik has some controls with this functionality built-in
EDIT: it seems that the normal combo box also supports this
This also shows a quick example
I have a DataGridView with a TextBox column (DataGridViewTextBoxColumn). I already set the AutoCompleteDataSource to a list of string values. Now, the default behavior of the TextBox column is to ONLY show the AutoComplete ListBox when something is typed. Is there a way to show/drop that ListBox on the CellEnter event or as soon as a user highlights that cell?
NOTE: I don't want to use a ComboBox (DataGridViewComboBoxColumn) in that column. I have my reasons for that :)
Thanks in advance.
OK So apparently there isn't a way to do that. So what I did was to just create a ListBox control and show it with the DataSource I wanted displayed. Then handle the associated events.
Please let me know if there's an easier way to do this.
Thanks