I have a combobox of dropdownlist style as one of the controls on a
tabbed form.
The list is populated by setting the DataSource property to a dataset
and then the DisplayMember and ValueMember properties are set to the
names of 2 of the fields in the dataset.
I noticed that when the form displays, the combobox defaults to the
first item in the list, not to blank (selectedindex=-1) as I would
have expected. I can use the Form_Activated event to set the
selectedindex=-1 and that is ok, until a different tab is selected
followed by this tab. Now the selectedindex=0 again and the combobox
shows the first item in the list again, even though the index change
event didnt fire.
2  1460 
* gr************@ lycos.com (chris in grimsby) scripsit: The list is populated by setting the DataSource property to a dataset
and then the DisplayMember and ValueMember properties are set to the
names of 2 of the fields in the dataset.
I noticed that when the form displays, the combobox defaults to the
first item in the list, not to blank (selectedindex=-1) as I would
have expected. I can use the Form_Activated event to set the
selectedindex=-1 and that is ok, until a different tab is selected
followed by this tab. Now the selectedindex=0 again and the combobox
shows the first item in the list again, even though the index change
event didnt fire.
BUG: ComboBox Does Not Clear When You Set SelectedIndex to -1
<URL:http://support.microso ft.com/?id=327244>
--
Herfried K. Wagner [MVP]
<URL:http://dotnet.mvps.org/>
I have also experienced this issue with MDI child forms. The fix is the same
as for tab controls:
give the combobox a different binding context to the form (which is the
default). e.g.
comboBox1.Bindi ngContext = New BindingContext( )
"chris in grimsby" <gr************ @lycos.com> wrote in message
news:8a******** *************** ***@posting.goo gle.com... I have a combobox of dropdownlist style as one of the controls on a
tabbed form.
The list is populated by setting the DataSource property to a dataset
and then the DisplayMember and ValueMember properties are set to the
names of 2 of the fields in the dataset.
I noticed that when the form displays, the combobox defaults to the
first item in the list, not to blank (selectedindex=-1) as I would
have expected. I can use the Form_Activated event to set the
selectedindex=-1 and that is ok, until a different tab is selected
followed by this tab. Now the selectedindex=0 again and the combobox
shows the first item in the list again, even though the index change
event didnt fire. This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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