is there a method of setting up my datagridview to show me textboxcolumns until editmode is entered? At which time I will swap some textboxcolumns for bound comboboxcolumns. And at the end of validation/exit edit mode I can swap back?
If there's a method of doing this please share some links to examples.
I wouldn't try to switch DataGridView ColumnTypes like that. Sounds like a bad time.
Is your goal to have a DataGridViewComboBoxColumn that does not display the ComboBox dropdown button when it's not being edited? If so, there are two options:
Set the column's DataGridViewComboBoxColumn.DisplayStyleForCurrentCellOnly property to True.
Create your own DGV column based on the ComboBox by extending DataGridViewTextBoxCell. MSDN has a great article for doing this with the Calendar control here.
Of course you can. In the properties of the datagridview you can drill down to the column proprieties and switch the datatype to combo box. Very straight forward and easy.
Related
Is it possible lock the combobox so that the text can not be deleted/erased or modified. And make only choose the items? Thank you in advance. Hope is it possible.
Set the "DropDownStyle" property of the combobox to DropDownList.
This will allow only items in the list to be selected and will not allow any user input:
Option 1
Simply set the ComboBox.Enabled to False - that way they can't change the values!
Option 2
Otherwise, use the dropDownStyle:
make DropDownStyle property to DropDownList instead of DropDown
For more information
Read this article (yes, it's written in c#, but the properties are the same!)
the above image displays this quite well.
EDIT
There is also a question previously asked here that asked a similar question.
You can set ComboBox.DropDownStyle to ComboBoxStyle.DropDownList.
How can I monitor a ComboBox for changes?
The SelectedIndexChanged event only firnges when selection is changed by choosing a different value from the combobox, I would like to monitor chaes when the selection is manually deleted and no value was chosen.
Thanks in advance!
Easy, simply use the event TextChanged:
Occurs when the Text property value changes.
See the MSDN Documentation about it.
Just extend combobox class and override SelectedIndexChange event to fit your needs.
You can select to Indexchange or Valuechange or Textchange
Then, you can try to put some code. Like record it for every change.
like adding below code to the Valuechange
listbox1.items.add = combobox1.selecteditem
Of course you must made the visible to false
I want to make custom combo box which have contain datagrid and textbox too.
On clicks into combo box datagridview should be appear and selecting any row particular cell value of the datagridview added on the combo.
thanks in advance..
As your question is written I have no idea how to answer it, I can't figure out how you could sensibly show a DataGridView inside a ComboBox. I'm writing this answer with the assumption that you mean that the form should have a ComboBox that are "linked" to a DataGridView rather than actually contain it.
If so, all you need to do is to add the ComboBox and DataGridView to the form, make the DataGridView invisible. Then you handle the SelectedIndexChanged event for the ComboBox, in the handler, make the grid visibile, find the index of the row and column you want to show and write code like (code not tested so might not be correct):
grid.SelectedRows.Clear()
grid.FirstDisplayedScrollingRowIndex = rowIndex
grid.Rows(rowIndex).Cells(colIndex).Selected = True
grid.Show()
I have a CheckedListBox with a few items and I want to allow user to select more than one using arrows keys or mouse clicks combined with shift and ctrl keys so I set SelectionMode property to MultiExtended.
In design time it is not possible I get an error:
value property is not valid.
and if I set it in runtime by doing:
clbEmployees.SelectionMode = SelectionMode.MultiSimple
I get an error too:
CheckedListBox is not compatible with multiple selection.
How could I do this?
It's not supported for the CheckedListBox.
However, I'm fairly sure that you could mimic that functionality in a ListView. Just look at the CheckBoxes and MultiSelect properties of the Listview. As far as I can tell from the documenation those are compatible.
This might be too late, but I just put my solution here; Works perfect for me:
1- Just leave the CheckedListBox Selection mode as "ONE' in property sheet.
2- in your code, loop thru the checked item in your checked Box using the checked item property as following:
For each XX as 'DataTpe' in CheckedListBox.CheckedItems
'Here you assign each checked item to wherever you want to direct to'
Next
(This question is narrower in scope than this question I asked earlier.)
Say I have a DataGridViewComboBoxColumn, and want to switch the style of the ComboBox control between DropDownList and DropDown (mainly for the text field editing capability). I'd like to do this on a row-by-row basis (at the DataGridViewComboBoxCell level).
How would I do that programatically?
Or maybe a different way of asking: How do I access the ComboBox control given an object of type DataGridViewComboBoxCell?
(I'm in VB 2005.)
Thanks as always.
Not sure if you still need an answer, but i have a question that covers similar ground: Detect which column is showing an editing control in a datagridview
i use something like this line to get the combobox out of the DataGridView (DGV) in my DataGridView's CellValidating event:
Dim comboBox As DataGridViewComboBoxCell = DGV.Item(e.ColumnIndex, e.RowIndex)
later i use this line to get change the DropDownList ComboBoxCell to a DropDown:
cb.DropDownStyle = ComboBoxStyle.DropDown
For mine to work i had to make sure the 'cb' was of the ComboBox type, i dont remember if i was able to get it working well if the combobox was of the DataGridViewComboBoxCell type.