ArgumentExceptionIsUnHandled

[Laurence]

In VS.2005 Using VB.NET on a windows XP (sp2) fully patched.

I have a project that has a Microsoft DataGridView on it.
Occasionally, when I click on a column header, I get:

ArgumentExceptionIsUnHandled
At least one object must implement IComparable

this problem is Intermittent, it doesn't happen all the time,
but happens about once in every five clicks of the column header.

I am at a total loss as to what this could be.

Thanks in Advance,

Laurence

Here is the detail:

System.ArgumentException was unhandled
Message="At least one object must implement IComparable."
Source="mscorlib"
StackTrace:
at System.Collections.Comparer.Compare(Object a, Object b)
at System.Windows.Forms.DataGridViewRowCollection.RowComparer.CompareObjects(Object value1, Object value2, Int32
rowIndex1, Int32 rowIndex2)
at System.Windows.Forms.DataGridViewRowCollection.RowArrayList.CustomQuickSort(Int32 left, Int32 right)
at System.Windows.Forms.DataGridViewRowCollection.Sort(IComparer customComparer, Boolean ascending)
at System.Windows.Forms.DataGridView.SortInternal(IComparer comparer, DataGridViewColumn dataGridViewColumn,
ListSortDirection direction)
at System.Windows.Forms.DataGridView.Sort(DataGridViewColumn dataGridViewColumn, ListSortDirection direction)
at System.Windows.Forms.DataGridView.OnColumnHeaderMouseClick(DataGridViewCellMouseEventArgs e)
at System.Windows.Forms.DataGridView.OnMouseClick(MouseEventArgs e)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.DataGridView.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at
System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32
dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.Run(Form mainForm)
at MiscellaneousProjects.frmSearch.Main() in C:\vbdev\MiscellaneousProjects\Client
Application\MiscellaneousProjects\MiscellaneousProjects\frmSearch.vb:line 3
at System.AppDomain.nExecuteAssembly(Assembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()

 

[Larry]

I found out what it was, you can't have cell without something in it,
even if you have nothing to put into it, you have to put system.dbnull.value
in the cell.

In VS.2005 Using VB.NET on a windows XP (sp2) fully patched.

I have a project that has a Microsoft DataGridView on it.
Occasionally, when I click on a column header, I get:

ArgumentExceptionIsUnHandled
At least one object must implement IComparable

this problem is Intermittent, it doesn't happen all the time,
but happens about once in every five clicks of the column header.

I am at a total loss as to what this could be.

Thanks in Advance,

Laurence

Here is the detail:

System.ArgumentException was unhandled
Message="At least one object must implement IComparable."
Source="mscorlib"
StackTrace:
at System.Collections.Comparer.Compare(Object a, Object b)
at
System.Windows.Forms.DataGridViewRowCollection.RowComparer.CompareObjects(Object
value1, Object value2, Int32 rowIndex1, Int32 rowIndex2)
at
System.Windows.Forms.DataGridViewRowCollection.RowArrayList.CustomQuickSort(Int32
left, Int32 right)
at System.Windows.Forms.DataGridViewRowCollection.Sort(IComparer
customComparer, Boolean ascending)
at System.Windows.Forms.DataGridView.SortInternal(IComparer
comparer, DataGridViewColumn dataGridViewColumn, ListSortDirection
direction)
at System.Windows.Forms.DataGridView.Sort(DataGridViewColumn
dataGridViewColumn, ListSortDirection direction)
at
System.Windows.Forms.DataGridView.OnColumnHeaderMouseClick(DataGridViewCellMouseEventArgs
e)
at System.Windows.Forms.DataGridView.OnMouseClick(MouseEventArgs e)
at System.Windows.Forms.Control.WmMouseUp(Message& m,
MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.DataGridView.WndProc(Message& m)
at
System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at
System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr
hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG&
msg)
at
System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32
dwComponentID, Int32 reason, Int32 pvLoopData)
at
System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32
reason, ApplicationContext context)
at
System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32
reason, ApplicationContext context)
at System.Windows.Forms.Application.Run(Form mainForm)
at MiscellaneousProjects.frmSearch.Main() in
C:\vbdev\MiscellaneousProjects\Client
Application\MiscellaneousProjects\MiscellaneousProjects\frmSearch.vb:line 3
at System.AppDomain.nExecuteAssembly(Assembly assembly, String[]
args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence
assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext
executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()