Hi, 

we are using InfragisticsWPF4.v10.2. in our  case there is no possibility to implement IDataErrorInfo on the business class object. and our scenario is like this:

we have XamGrid, that contains one column as DropDown. this DropDwon is bound to some other DataSource that populates values on some other selection criteria on other control then XamGrid.

One of the Property of business object is binded to this Dropdown column. using MVVM pattern we change the value of this Property and there is a validation, that checks if the value is not found in DropDown then show Error. 

How i should do this?

I did same thing with ListView control of .Net Framework and it did work as expected. it showed the error icon and the tooltip as required. To achieve this behavior, I created a ValidatonRule and binded to the DropDown.

<ComboBox.SelectedValue>

                                                <Binding Path="DataItem.SelectedSubmitMethod" UpdateSourceTrigger="PropertyChanged"  Mode="TwoWay" ValidatesOnDataErrors="True" ValidatesOnExceptions="True" >

                                                    <Binding.ValidationRules >

                                                        <StaticResource ResourceKey="ComboBoxSelectedItemValidationRule"/>

                                                    </Binding.ValidationRules>

                                                </Binding>

                                            </ComboBox.SelectedValue>

                                            <Validation.ErrorTemplate>

                                                <ControlTemplate >

                                                    <DockPanel>

                                                        <TextBlock Foreground="Red" FontSize="20" FontWeight="Bold">!</TextBlock>

                                                        <AdornedElementPlaceholder/>

                                                    </DockPanel>

                                                </ControlTemplate>

                                            </Validation.ErrorTemplate>

Is it Possible to do this with Infragistics?

Hi,

This forum is for Windows Forms. I'm afraid I know next to nothing about the xamGrid. You should post your question in the WPF forums.