GDBG problem with 4.1.0.50

[Michael Cruanes]

Hi Syncfusion Team,

Since we upgraded to 4.1.0.50 no ComboBox using a dataset is working and following trace appears in output window:

System.NullReferenceException: Object reference not set to an instance of an object.
at System.Data.Common.ObjectStorage.CompareValueTo(Int32 recordNo1, Object value)
at System.Data.Index.FindNodeByKey(Object originalKey)
at System.Data.Index.FindRecords(Object key)
at System.Data.DataView.System.ComponentModel.IBindingList.Find(PropertyDescriptor property, Object key)
at Syncfusion.Windows.Forms.Grid.GridComboBoxListBoxHelper.FindKey(IList thisList, PropertyDescriptor property, Object key)
at Syncfusion.Windows.Forms.Grid.GridComboBoxListBoxHelper.FindValue(Object value)
at Syncfusion.Windows.Forms.Grid.GridComboBoxCellModel.GetFormattedText(GridStyleInfo style, Object value, Int32 textInfo)
at Syncfusion.Windows.Forms.Grid.GridCellModelBase.GetFormattedOrActiveTextAt(Int32 rowIndex, Int32 colIndex, GridStyleInfo style)
at Syncfusion.Windows.Forms.Grid.GridStaticCellModel.OnQueryPrefferedClientSize(Graphics g, Int32 rowIndex, Int32 colIndex, GridStyleInfo style, GridQueryBounds queryBounds)

Do you have any proposal to solve this?

Best Regards,
Michael

[Administrator]

Hi Michael,

Do you have a sample that shows the problem so we can debug into it? Also which framework version do you use?

Thanks,
Stefan

>Hi Syncfusion Team,
>
>Since we upgraded to 4.1.0.50 no ComboBox using a dataset is working and following trace appears in output window:
>
>System.NullReferenceException: Object reference not set to an instance of an object.
> at System.Data.Common.ObjectStorage.CompareValueTo(Int32 recordNo1, Object value)
> at System.Data.Index.FindNodeByKey(Object originalKey)
> at System.Data.Index.FindRecords(Object key)
> at System.Data.DataView.System.ComponentModel.IBindingList.Find(PropertyDescriptor property, Object key)
> at Syncfusion.Windows.Forms.Grid.GridComboBoxListBoxHelper.FindKey(IList thisList, PropertyDescriptor property, Object key)
> at Syncfusion.Windows.Forms.Grid.GridComboBoxListBoxHelper.FindValue(Object value)
> at Syncfusion.Windows.Forms.Grid.GridComboBoxCellModel.GetFormattedText(GridStyleInfo style, Object value, Int32 textInfo)
> at Syncfusion.Windows.Forms.Grid.GridCellModelBase.GetFormattedOrActiveTextAt(Int32 rowIndex, Int32 colIndex, GridStyleInfo style)
> at Syncfusion.Windows.Forms.Grid.GridStaticCellModel.OnQueryPrefferedClientSize(Graphics g, Int32 rowIndex, Int32 colIndex, GridStyleInfo style, GridQueryBounds queryBounds)
>
>
>Do you have any proposal to solve this?
>
>Best Regards,
>Michael
>

[Administrator]

Hi Stephan,

I am using 2.0 Framework.
The problem apparently occurs only when the DataTable bound to the GDBG has DBNull values and the cell is a ComboBox.
When clicking in the cell, the cells becomes red with "Exception" as cell-text and the application crashes.

Best Regards,
Michael

[Michael Cruanes]

In attachment is a sample that reproduces the problem. The first row has a DBNull value. Click in the cell and you will see that happens. I hope it will help you.

TestGDBG2.zip