ArgumentExceptionIsUnHandled

[JohnOb]

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()