Thanks for the trick!
colbert wrote:
From my test, the problem regarding to the ENTER key only exists when the
07-Jan-09
From my test, the problem regarding to the ENTER key only exists when the
current edit row is the last row in the DataGridView. So my though is to
register the ComboBox's PreviewKeyDown event. When this event catch the
ENTER key pressing, we add a new row to the DataGridView, this will fix the
ENTER key issue. The last thing we need to make it work is removing the new
added row
void Form1_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e
if (e.KeyCode == Keys.Enter
this.dataGridView1.Rows.RemoveAt(this.dataGridView1.Rows.Add())
We have to register the ComboBox's event in the EditingControlShowing event
handle because we can not access the instance of the ComboBox in the other
places. And before we register the PreviewKeyDown event, we firstly remove
the last registered this event. So the handle function will not get called
twice
void dataGridView1_EditingControlShowing(object sender,
DataGridViewEditingControlShowingEventArgs e
tr
if (e.Control.GetType() ==
typeof(DataGridViewComboBoxEditingControl)
((ComboBox)e.Control).DropDownStyle =
ComboBoxStyle.DropDown
((ComboBox)e.Control).PreviewKeyDown -= new
PreviewKeyDownEventHandler(Form1_PreviewKeyDown)
((ComboBox)e.Control).PreviewKeyDown += new
PreviewKeyDownEventHandler(Form1_PreviewKeyDown)
catch (Exception ex
Debug.Print(ex.Message)
I did a lot investigation to find this tricky solution. And it will not be
well document and supported. It just works fine from my test. So, I suggest
you also do some tests in you side and then make the decision whether to
use it to avoid the ENTER key issue, or just let the customer know they
need to use the TAB key or the Mouse to post back the ComboBox values
Hope this clarifies. And any questions or concerns, please feel free to
update the thread. I am very pleased if I can provide any future assistance
Have a nice day
Best regards
Colbert Zhou (
[email protected], remove 'online.'
Microsoft Online Community Suppor
Delighting our customers is our #1 priority. We welcome your comments and
suggestions about how we can improve the support we provide to you. Please
feel free to let my manager know what you think of the level of service
provided. You can send feedback directly to my manager at:
(e-mail address removed).
Previous Posts In This Thread:
Editable DataGridViewComboBoxCell
In my application there is a need for editable DataGridViewComboBoxColumn. In
normal DataGridViewComboBoxCell, user can't enter his custom value, only he
can select a value in the drop-down box. In my application, the user also
need to enter his own value
I got the following sample from msdn forum for this requirement
<sample code
private void dataGridView1_CellValidating(object sender,
DataGridViewCellValidatingEventArgs e
if (dataGridView1.CurrentCell.IsInEditMode
if (dataGridView1.CurrentCell.GetType() ==
typeof(DataGridViewComboBoxCell)
DataGridViewComboBoxCell cell =
(DataGridViewComboBoxCell)dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex]
if (!cell.Items.Contains(e.FormattedValue)
cell.Items.Add(e.FormattedValue)
cell.Value = e.FormattedValue
//keep the new value in the member variable
newCellValu
newCellValue = e.FormattedValue
private void dataGridView1_EditingControlShowing(object sender,
DataGridViewEditingControlShowingEventArgs e)
{
if (e.Control.GetType() ==
typeof(DataGridViewComboBoxEditingControl))
{
((ComboBox)e.Control).DropDownStyle = ComboBoxStyle.DropDown;
}
}
private void dataGridView1_CellValidated(object sender,
DataGridViewCellEventArgs e)
{
if (dataGridView1.CurrentCell.GetType() ==
typeof(DataGridViewComboBoxCell))
{
DataGridViewCell cell =
dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex];
cell.Value = newCellValue;
}
}
<sample code>
Using the above sample code, I can enter my own value. But the entered value
is displayed only combox-box is not clicked(when dropdown box is not shown).
If the combobox in the cell is clicked, the entered value is not displayed.
Please provide me the solution for my requirement.
Thanks.
Hello Anbaesivam, Do you mean the text you input disappears after clicking the
Hello Anbaesivam,
Do you mean the text you input disappears after clicking the drop down list
of the combobox?
I have used the exactly same codes as yours, but they work fine in my side.
The text I input always appears no matter whether the dropdown list is
visible, if I press Tab to post them back. My guess is that, in your side,
you may not post back the inputted text. Therefore they are lost.
Based on my test, after entering text in such kind of
DataGridViewComboBoxCell, we need to press the Tab key to make the cell
value to be invalidated. And then the Invalidating and Invalidated event
will fire. Pressing Enter key will not cause Invalidating and Invalidated
event fire. So, our codes adding combobox item and setting cell value does
not get executed indeed.
Please give it a try in your side and let me know if pressing Tab key will
resolve the issue. Any future questions or concerns, please feel free to
let me know!
Have a good day!
Best regards,
Colbert Zhou (colbertz @online.microsoft.com, remove 'online.')
Microsoft Online Community Support
Delighting our customers is our #1 priority. We welcome your comments and
suggestions about how we can improve the support we provide to you. Please
feel free to let my manager know what you think of the level of service
provided. You can send feedback directly to my manager at:
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When I press TAB key it works fine.
When I press TAB key it works fine. Please let me know what are changes
needed to make this code work even when the user press ENTER key.
Thanks.
:
Hello Anbaesivam, Try to use the following version of
Hello Anbaesivam,
Try to use the following version of dataGridView1_EditingControlShowing,
void dataGridView1_EditingControlShowing(object sender,
DataGridViewEditingControlShowingEventArgs e)
{
try
{
if (e.Control.GetType() ==
typeof(DataGridViewComboBoxEditingControl))
{
((ComboBox)e.Control).DropDownStyle =
ComboBoxStyle.DropDown;
((ComboBox)e.Control).PreviewKeyDown -= new
PreviewKeyDownEventHandler(Form1_PreviewKeyDown);
((ComboBox)e.Control).PreviewKeyDown += new
PreviewKeyDownEventHandler(Form1_PreviewKeyDown);
}
}
catch (Exception ex)
{
Debug.Print(ex.Message);
}
}
And add the following event handle
void Form1_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
this.dataGridView1.Rows.RemoveAt(this.dataGridView1.Rows.Add());
}
}
This is just a tricky solution. Hope this helps!
Best regards,
Colbert Zhou (colbertz @online.microsoft.com, remove 'online.')
Microsoft Online Community Support
Delighting our customers is our #1 priority. We welcome your comments and
suggestions about how we can improve the support we provide to you. Please
feel free to let my manager know what you think of the level of service
provided. You can send feedback directly to my manager at:
(e-mail address removed).
Thanks for your solution. Can you please explain me the code?
Thanks for your solution. Can you please explain me the code?, i need to do
some customization.
:
From my test, the problem regarding to the ENTER key only exists when the
From my test, the problem regarding to the ENTER key only exists when the
current edit row is the last row in the DataGridView. So my though is to
register the ComboBox's PreviewKeyDown event. When this event catch the
ENTER key pressing, we add a new row to the DataGridView, this will fix the
ENTER key issue. The last thing we need to make it work is removing the new
added row.
void Form1_PreviewKeyDown(object sender, PreviewKeyDownEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
this.dataGridView1.Rows.RemoveAt(this.dataGridView1.Rows.Add());
}
}
We have to register the ComboBox's event in the EditingControlShowing event
handle because we can not access the instance of the ComboBox in the other
places. And before we register the PreviewKeyDown event, we firstly remove
the last registered this event. So the handle function will not get called
twice.
void dataGridView1_EditingControlShowing(object sender,
DataGridViewEditingControlShowingEventArgs e)
{
try
{
if (e.Control.GetType() ==
typeof(DataGridViewComboBoxEditingControl))
{
((ComboBox)e.Control).DropDownStyle =
ComboBoxStyle.DropDown;
((ComboBox)e.Control).PreviewKeyDown -= new
PreviewKeyDownEventHandler(Form1_PreviewKeyDown);
((ComboBox)e.Control).PreviewKeyDown += new
PreviewKeyDownEventHandler(Form1_PreviewKeyDown);
}
}
catch (Exception ex)
{
Debug.Print(ex.Message);
}
}
I did a lot investigation to find this tricky solution. And it will not be
well document and supported. It just works fine from my test. So, I suggest
you also do some tests in you side and then make the decision whether to
use it to avoid the ENTER key issue, or just let the customer know they
need to use the TAB key or the Mouse to post back the ComboBox values.
Hope this clarifies. And any questions or concerns, please feel free to
update the thread. I am very pleased if I can provide any future assistance.
Have a nice day!
Best regards,
Colbert Zhou (
[email protected], remove 'online.')
Microsoft Online Community Support
Delighting our customers is our #1 priority. We welcome your comments and
suggestions about how we can improve the support we provide to you. Please
feel free to let my manager know what you think of the level of service
provided. You can send feedback directly to my manager at:
(e-mail address removed).
Submitted via EggHeadCafe - Software Developer Portal of Choice
WPF Reflection Effect
http://www.eggheadcafe.com/tutorial...-beab-49bd76e20b9b/wpf-reflection-effect.aspx