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<TITLE> [Mono-bugs] [Bug 323053] DataGrid: Arrow and Tab keys not working
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<H1>[Mono-bugs] [Bug 323053] DataGrid: Arrow and Tab keys not working</H1>
<B>bugzilla_noreply at novell.com</B>
<A HREF="mailto:mono-bugs%40lists.ximian.com?Subject=%5BMono-bugs%5D%20%5BBug%20323053%5D%20DataGrid%3A%20Arrow%20and%20Tab%20keys%20not%20working&In-Reply-To=bug-323053-28286%40https.bugzilla.novell.com/"
TITLE="[Mono-bugs] [Bug 323053] DataGrid: Arrow and Tab keys not working">bugzilla_noreply at novell.com
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<I>Wed Sep 17 14:14:39 EDT 2008</I>
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<PRE><A HREF="https://bugzilla.novell.com/show_bug.cgi?id=323053">https://bugzilla.novell.com/show_bug.cgi?id=323053</A>
User <A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">nagappan at gmail.com</A> added comment
<A HREF="https://bugzilla.novell.com/show_bug.cgi?id=323053#c2">https://bugzilla.novell.com/show_bug.cgi?id=323053#c2</A>
--- Comment #2 from Nagappan A &lt;<A HREF="http://lists.ximian.com/mailman/listinfo/mono-bugs">nagappan at gmail.com</A>&gt; 2008-09-17 12:14:39 MDT ---
Created an attachment (id=240128)
--&gt; (<A HREF="https://bugzilla.novell.com/attachment.cgi?id=240128">https://bugzilla.novell.com/attachment.cgi?id=240128</A>)
Proposed patch
The attached patch fixes the crash. But I notice:
1) always the first row / first column value is null. If I select that, I get a
warning window, saying that &quot;Exception of type
'System.Data.NoNullAllowedException' was thrown. Do you wish to correct the
value?&quot;.
2) When I press tab in second column with this test say, I have 5 rows and each
of them has a value. If I navigate back in row 2 and column 2 using tab key,
the previous column value is getting stored and further pressing tab, I get a
warning window &quot;Column 'Column2' us constrained to be unique. Value 'b' is
already present. Do you wish to correct the value?&quot;
3) If I press No in procedure 2, I get:
System.IndexOutOfRangeException: Array index is out of range.
at System.Windows.Forms.DataGrid.InvalidateRowHeader (Int32 row) [0x0002c] in
/home/nags/work/mcs/class/Managed.Windows.Forms/System.Windows.Forms/DataGrid.cs:3143
at System.Windows.Forms.DataGrid.EndEdit
(System.Windows.Forms.DataGridColumnStyle gridColumn, Int32 rowNumber, Boolean
shouldAbort) [0x0006b] in
/home/nags/work/mcs/class/Managed.Windows.Forms/System.Windows.Forms/DataGrid.cs:1075
at (wrapper remoting-invoke-with-check) System.Windows.Forms.DataGrid:EndEdit
(System.Windows.Forms.DataGridColumnStyle,int,bool)
at System.Windows.Forms.DataGrid.EndEdit () [0x0003c] in
/home/nags/work/mcs/class/Managed.Windows.Forms/System.Windows.Forms/DataGrid.cs:2501
at System.Windows.Forms.DataGrid.ScrollToColumnInPixels (Int32 pixel)
[0x0007e] in
/home/nags/work/mcs/class/Managed.Windows.Forms/System.Windows.Forms/DataGrid.cs:2548
at System.Windows.Forms.DataGrid.EnsureCellVisibility (DataGridCell cell)
[0x00053] in
/home/nags/work/mcs/class/Managed.Windows.Forms/System.Windows.Forms/DataGrid.cs:2260
at System.Windows.Forms.DataGrid.set_CurrentCell (DataGridCell value)
[0x00216] in
/home/nags/work/mcs/class/Managed.Windows.Forms/System.Windows.Forms/DataGrid.cs:533
at System.Windows.Forms.DataGrid.ProcessGridKey
(System.Windows.Forms.KeyEventArgs ke) [0x001de] in
/home/nags/work/mcs/class/Managed.Windows.Forms/System.Windows.Forms/DataGrid.cs:1871
at System.Windows.Forms.DataGrid.ProcessKeyPreview
(System.Windows.Forms.Message&amp; m) [0x00028] in
/home/nags/work/mcs/class/Managed.Windows.Forms/System.Windows.Forms/DataGrid.cs:1994
at System.Windows.Forms.Control.ProcessKeyPreview
(System.Windows.Forms.Message&amp; m) [0x0000b] in
/home/nags/work/mcs/class/Managed.Windows.Forms/System.Windows.Forms/Control.cs:4743
at System.Windows.Forms.DataGridTextBox.ProcessKeyMessage
(System.Windows.Forms.Message&amp; m) [0x000fe] in
/home/nags/work/mcs/class/Managed.Windows.Forms/System.Windows.Forms/DataGridTextBox.cs:126
at System.Windows.Forms.TextBoxBase.WndProc (System.Windows.Forms.Message&amp; m)
[0x0003e] in
/home/nags/work/mcs/class/Managed.Windows.Forms/System.Windows.Forms/TextBoxBase.cs:1535
at System.Windows.Forms.TextBox.WndProc (System.Windows.Forms.Message&amp; m)
[0x000d0] in
/home/nags/work/mcs/class/Managed.Windows.Forms/System.Windows.Forms/TextBox.cs:606
at System.Windows.Forms.DataGridTextBox.WndProc
(System.Windows.Forms.Message&amp; m) [0x00031] in
/home/nags/work/mcs/class/Managed.Windows.Forms/System.Windows.Forms/DataGridTextBox.cs:149
at System.Windows.Forms.Control+ControlWindowTarget.OnMessage
(System.Windows.Forms.Message&amp; m) [0x00000] in
/home/nags/work/mcs/class/Managed.Windows.Forms/System.Windows.Forms/Control.cs:228
at System.Windows.Forms.Control+ControlNativeWindow.WndProc
(System.Windows.Forms.Message&amp; m) [0x00000] in
/home/nags/work/mcs/class/Managed.Windows.Forms/System.Windows.Forms/Control.cs:209
at System.Windows.Forms.NativeWindow.WndProc (IntPtr hWnd, Msg msg, IntPtr
wParam, IntPtr lParam) [0x00085] in
/home/nags/work/mcs/class/Managed.Windows.Forms/System.Windows.Forms/NativeWindow.cs:242
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