gridview combobox filter on combo box columns

[Nadav]

Hi,

I have a column that is connected to an enum, and another column that is connected to a list of objects.

when i try to select an object/enum member on the filter, the system crashes.

in the enum case with the following reason:

System.InvalidCastException was unhandled

  Message="Invalid cast from 'System.String' to 'Sivan3.Dao.Poco.Student+StudentStatus'."

  Source="mscorlib"

  StackTrace:

       at System.Convert.DefaultToType(IConvertible value, Type targetType, IFormatProvider provider)

       at System.String.System.IConvertible.ToType(Type type, IFormatProvider provider)

       at System.Convert.ChangeType(Object value, Type conversionType, IFormatProvider provider)

       at Telerik.WinControls.UI.GridFilterCellElement.SetFilterValue(Object value)

       at Telerik.WinControls.UI.GridFilterCellElement.set_Value(Object value)

       at Telerik.WinControls.UI.RadGridView.UpdateFiltering()

       at Telerik.WinControls.UI.RadGridView.OnValueChanged(Object sender, EventArgs e)

       at Telerik.WinControls.UI.RadGridView.CallValueChanged(Object sender, EventArgs e)

       at Telerik.WinControls.UI.BaseGridEditor.OnValueChanged()

       at Telerik.WinControls.UI.RadComboBoxEditor.comboBoxElement_TextChanged(Object sender, EventArgs e)

       at Telerik.WinControls.RadItem.OnTextChanged(EventArgs e)

       at Telerik.WinControls.UI.EditorBaseElement.OnTextChanged(EventArgs e)

       at Telerik.WinControls.RadItem.OnPropertyChanged(RadPropertyChangedEventArgs e)

       at Telerik.WinControls.UI.PopupEditorBaseElement.OnPropertyChanged(RadPropertyChangedEventArgs e)

       at Telerik.WinControls.UI.RadComboBoxElement.OnPropertyChanged(RadPropertyChangedEventArgs e)

       at Telerik.WinControls.RadObject.RaisePropertyNotifications(RadPropertyValue propVal, Object oldValue, Object newValue, ValueSource oldSource)

       at Telerik.WinControls.RadObject.SetValueCore(RadPropertyValue propVal, Object propModifier, Object newValue, ValueSource source)

       at Telerik.WinControls.RadElement.SetValueCore(RadPropertyValue propVal, Object propModifier, Object newValue, ValueSource source)

       at Telerik.WinControls.RadObject.SetValue(RadProperty property, Object value)

       at Telerik.WinControls.RadItem.set_Text(String value)

       at Telerik.WinControls.UI.RadComboBoxElement.set_Text(String value)

       at Telerik.WinControls.UI.RadComboBoxElement.SyncTextWithItem()

       at Telerik.WinControls.UI.ComboPopupForm.listBoxElement_SelectedIndexChanged(Object sender, EventArgs e)

       at Telerik.WinControls.UI.RadListBoxElement.OnSelectedIndexChanged(SelectedIndexChangedEventArgs e)

       at Telerik.WinControls.UI.RadListBoxElement.DispatchSelectionEvents(Boolean selectedIndex, Boolean selectedItem, Object oldValue)

       at Telerik.WinControls.UI.RadListBoxElement.SetSelectedIndex(Int32 value, Boolean fireEvents)

       at Telerik.WinControls.UI.RadListBoxElement.set_SelectedIndex(Int32 value)

       at Telerik.WinControls.UI.RadListBoxElement.HandleSelectOne(Int32 newIndex)

       at Telerik.WinControls.UI.RadListBoxElement.ProcessSelection(Int32 newIndex, Boolean onMouseDrag, InputDevice device)

       at Telerik.WinControls.UI.RadListBoxElement.ProcessMouseSelection(RadItem item, MouseNotification reason)

       at Telerik.WinControls.UI.RadListBoxItem.DispatchMouseNotification(MouseNotification notification)

       at Telerik.WinControls.UI.RadListBoxItem.OnMouseUp(MouseEventArgs e)

       at Telerik.WinControls.RadElement.OnCLREventsRise(RoutedEventArgs args)

       at Telerik.WinControls.RadElement.OnBubbleEvent(RadElement sender, RoutedEventArgs args)

       at Telerik.WinControls.RadItem.OnBubbleEvent(RadElement sender, RoutedEventArgs args)

       at Telerik.WinControls.RadElement.RaiseBubbleEvent(RadElement sender, RoutedEventArgs args)

       at Telerik.WinControls.RadItem.RaiseBubbleEvent(RadElement sender, RoutedEventArgs args)

       at Telerik.WinControls.RadElement.RaiseRoutedEvent(RadElement sender, RoutedEventArgs args)

       at Telerik.WinControls.RadElement.DoMouseUp(MouseEventArgs e)

       at Telerik.WinControls.RadElement.CallDoMouseUp(MouseEventArgs e)

       at Telerik.WinControls.ComponentInputBehavior.OnMouseUp(MouseEventArgs e)

       at Telerik.WinControls.RadControl.OnMouseUp(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.ScrollableControl.WndProc(Message& m)

       at Telerik.WinControls.RadControl.WndProc(Message& m)

       at Telerik.WinControls.UI.RadPopupControlBase.WndProc(Message& m)

       at Telerik.WinControls.UI.ComboPopupForm.WndProc(Message& msg)

       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 Sivan3.Program.Main() in D:\Sivan3\trunk\src\PC\Sivan3\Program.cs:line 32

       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: 

on the databound columns, it throws an exception that an Object Must implement IConvertible.

Thanks,

Nadav Ben-Gal

[Svett]

Hello Nadav,

You can find the answer to your question in the support ticket that you have opened concerning the same topic.

Regards,
Svett
the Telerik team

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[Vivek]

hi this is vivek 

currently am using telerik winforms demo ver q2 2012 . is there any possible for telerik rad grid view filter textbox to combobox .
i want use filter textbox column to combobox .

[Svett]

Hi Vivek,

You can replace the text box editor with drop down list editor by using the EditorRequired and CellEditorInidialized events. You can use the following code snippets as sample:

void radGridView1_EditorRequired(object sender, EditorRequiredEventArgs e)
{
    if (this.radGridView1.CurrentRow is GridViewFilteringRowInfo)
    {
        if (e.EditorType == typeof(RadTextBoxEditor))
        {
            e.EditorType = typeof(RadDropDownListEditor);
        }
    }
}


void radGridView1_CellEditorInitialized(object sender, GridViewCellEventArgs e)
{
    if (e.Row is GridViewFilteringRowInfo)
    {
        RadDropDownListEditor editor = e.ActiveEditor as RadDropDownListEditor;
        RadDropDownListEditorElement element = editor.EditorElement as RadDropDownListEditorElement;
        element.DisplayMember = "DisplayMember";
        element.ValueMember = "ValueMember";
        element.DataSource = source;
    }
}

I hope this helps.
 
Regards,
Svett
the Telerik team