Add ImageButton to GridView

[Sean]

Hello,
I am attempting to add an image button to each row in the grid.  I have found a couple of old posts that detailed exactly what I am trying to do.  However, when I tried to implement the code I am getting an "Out of Memory" error.  The image that I am trying to load is only 2 KB, and the exception occurs on the first row in the gird, so I wouldn't think this would be an issue.  I can successfully load the image to a Picturebox control on the form without a problem.

In the Form_Load event, I call this method to load the image:

Private Sub LoadAppImages()
        Dim myAssembly As System.Reflection.Assembly
        Dim myNamespace As String
        Dim fileName As String

        myAssembly = System.Reflection.Assembly.GetEntryAssembly
        myNamespace = myAssembly.GetName.Name


        fileName = myNamespace & ".tool_dropdown.png"

        Using stream As System.IO.Stream = myAssembly.GetManifestResourceStream(fileName)

            If stream IsNot Nothing Then
                _toolsIcon = Image.FromStream(stream)
            End If

            stream.Close()

        End Using

    End Sub

Then in the CellFormatting event, I configure the image button:

Private Sub rgLines_CellFormatting(ByVal sender As Object, ByVal e As Telerik.WinControls.UI.CellFormattingEventArgs) Handles rgLines.CellFormatting

        If TypeOf (e.CellElement.ColumnInfo) Is GridViewDataColumn AndAlso _
            Not TypeOf (e.CellElement.RowElement) Is GridTableHeaderRowElement Then

            Dim column As GridViewDataColumn = CType(e.CellElement.ColumnInfo, GridViewDataColumn)

            If column.FieldName = "TOOLS" Then

                'Check to see if the button has already been added
                If e.CellElement.Children.Count > 0 Then

                    Exit Sub

                End If

                Dim toolsButton As New RadImageButtonElement

                toolsButton.DisplayStyle = DisplayStyle.Image
                toolsButton.Image = _toolsIcon

                e.CellElement.Children.Add(toolsButton)
                ApplyThemeToElement(toolsButton, "ControlDefault")

            End If

        End If

    End Sub

The error occurs when I call "e.CellElement.Children.Add(toolsButton)". 

Here is the full Stack Trace.  Any ideas what I may be doing wrong?

System.Reflection.TargetInvocationException was unhandled
  Message="Exception has been thrown by the target of an invocation."
  Source="mscorlib"
  StackTrace:
       at System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
       at System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
       at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
       at System.Delegate.DynamicInvokeImpl(Object[] args)
       at System.Windows.Forms.Control.InvokeMarshaledCallbackDo(ThreadMethodEntry tme)
       at System.Windows.Forms.Control.InvokeMarshaledCallbackHelper(Object obj)
       at System.Threading.ExecutionContext.runTryCode(Object userData)
       at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
       at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Windows.Forms.Control.InvokeMarshaledCallback(ThreadMethodEntry tme)
       at System.Windows.Forms.Control.InvokeMarshaledCallbacks()
       at System.Windows.Forms.Control.WndProc(Message& m)
       at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
       at Telerik.WinControls.RadControl.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(ApplicationContext context)
       at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun()
       at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()
       at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[] commandLine)
       at WinFormQuotesGrid.My.MyApplication.Main(String[] Args) in 17d14f5c-a337-4978-8281-53493378c1071.vb:line 81
       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()
  InnerException: System.OutOfMemoryException
       Message="Out of memory."
       Source="System.Drawing"
       StackTrace:
            at System.Drawing.Graphics.CheckErrorStatus(Int32 status)
            at System.Drawing.Graphics.DrawImage(Image image, Rectangle destRect, Int32 srcX, Int32 srcY, Int32 srcWidth, Int32 srcHeight, GraphicsUnit srcUnit, ImageAttributes imageAttrs, DrawImageAbort callback, IntPtr callbackData)
            at System.Drawing.Bitmap.MakeTransparent(Color transparentColor)
            at Telerik.WinControls.Primitives.ImagePrimitive.get_Image()
            at Telerik.WinControls.Primitives.ImagePrimitive.OnPropertyChanged(RadPropertyChangedEventArgs e)
            at Telerik.WinControls.RadObject.UpdateEffectiveValue(RadProperty dp, RadPropertyMetadata metadata, Boolean isCoerceValue, Boolean isOldValueValid, Object oldValue, ValueSource oldValueSource, Boolean oldValueIsDeferred, Boolean coerceWithDeferredReference)
            at Telerik.WinControls.RadObject.SetValueCommon(RadProperty dp, Object value, RadPropertyMetadata metadata, Boolean coerceWithDeferredReference)
            at Telerik.WinControls.RadObject.SetValue(RadProperty dp, Object value)
            at Telerik.WinControls.RadObject.BindProperty(RadProperty myProperty, RadObject bindingSourceObject, RadProperty bindingSourceProperty, PropertyBindingOptions propertyBindingOptions)
            at Telerik.WinControls.UI.RadButtonElement.CreateChildElements()
            at Telerik.WinControls.RadElement.EnsureChildElements()
            at Telerik.WinControls.RadElement.InvalidateTotalTransformationReqursively()
            at Telerik.WinControls.RadElement.InvalidateTransformations(Boolean invalidateElement)
            at Telerik.WinControls.RadElement.ChangeCollection(RadElement child, ItemsChangeOperation changeOperation)
            at Telerik.WinControls.RadElementCollection.OnInsertComplete(Int32 index, Object value)
            at System.Collections.CollectionBase.System.Collections.IList.Insert(Int32 index, Object value)
            at Telerik.WinControls.RadElementCollection.Insert(Int32 index, RadElement value)
            at WinFormQuotesGrid.Form1.rgLines_CellFormatting(Object sender, CellFormattingEventArgs e) in C:\projects\ProjectQuote\WinFormQuotesGrid\WinFormQuotesGrid\Form1.vb:line 166
            at Telerik.WinControls.UI.RadGridView.OnCellFormatting(Object sender, CellFormattingEventArgs e)
            at Telerik.WinControls.UI.RadGridView.CallCellFormatting(Object sender, CellFormattingEventArgs e)
            at Telerik.WinControls.UI.GridDataRowElement.UpdateInfo()
            at Telerik.WinControls.UI.GridRowElement.Initialize(GridViewRowInfo rowInfo)
            at Telerik.WinControls.UI.GridTableBodyElement.UpdateRow(Int32 position, GridViewRowInfo rowInfo)
            at Telerik.WinControls.UI.GridTableBodyElement.UpdateRowElements(IEnumerable`1 rows, RectangleF clientRect, Single& y, Int32& position, Int32 startIndex, Int32& added, Single left, Single width)
            at Telerik.WinControls.UI.GridTableBodyElement.ArrangeOverride(SizeF finalSize)
            at Telerik.WinControls.RadElement.ArrangeCore(RectangleF finalRect)
            at Telerik.WinControls.RadElement.Arrange(RectangleF finalRect)
            at Telerik.WinControls.UI.GridTableElement.ArrangeOverride(SizeF finalSize)
            at Telerik.WinControls.RadElement.ArrangeCore(RectangleF finalRect)
            at Telerik.WinControls.RadElement.Arrange(RectangleF finalRect)
            at Telerik.WinControls.Layouts.ContextLayoutManager.UpdateLayout()
            at Telerik.WinControls.Layouts.ContextLayoutManager.UpdateLayoutCallback(ILayoutManager manager)
       InnerException:

[Victor]

Hello Sean,

Thank you for writing. This is related to the way resource streams work. When you get the resource stream and create an object from it, you must not close the stream afterwards. In your case you should simply remove the using block and use the stream without closing or disposing it. Please write back if you need further assistance.

Kind regards,
Victor
the Telerik team

Instantly find answers to your questions on the new Telerik Support Portal.
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[Sean]

Thanks for the response.  Should I be concerned about leaving that memory stream open?  It does implement IDisposable, so shouldn't I be calling that somewhere?

Sean

[Victor]

Hi Sean,

I am afraid that I am not exactly sure whether the stream should be closed. There are many other cases where you have access to objects which implement IDisposable but should not be disposed. One example is the Control.Paint() method. In the event arguments you have a Graphics reference which should not be disposed.

I suggest posting this question in StackOverflow or some other .NET website which you find trustworthy. Please write back if you have other questions.

Kind regards,
Victor
the Telerik team

Instantly find answers to your questions on the new Telerik Support Portal.
Check out the tips for optimizing your support resource searches.