Xamdatagrid combobox set selectIndex by code

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Thomas Kleist posted over 3 years ago

I have this combox field in my xamdatagrid how can I change the selectedIndex by code I c#

<igWPF:ComboBoxField Name="fejl" Label="Fejl" DisplayMemberPath="FejlTekst" ValuePath="FejlTekst" BindingType="Unbound" Visibility="Collapsed">

<igWPF:ComboBoxField.Settings>
<igWPF:FieldSettings>
<igWPF:FieldSettings.EditorStyle>
<Style TargetType="{x:Type igWPF:XamComboEditor}">
<Setter Property="ItemsSource" Value="{Binding DataItem.fejl}"/>
<Setter Property="DisplayMemberPath" Value="FejlTekst"/>
<Setter Property="SelectedIndex" Value="0"/>
<Setter Property="ValuePath" Value="{Binding DataItem.fejl}"/>

</Style>
</igWPF:FieldSettings.EditorStyle>
</igWPF:FieldSettings>
</igWPF:ComboBoxField.Settings>
</igWPF:ComboBoxField>

2680

Offline Bozhidara Pachilova posted over 3 years ago in reply to Thomas Kleist
Hi Thomas,

Thank you for the prompt response.

As the error is not reproducible in the isolated sample, this indicates a possible issue in your project.

One possible cause for this error is if you are using the Infragistics.Controls.Editors namespace rather than the Infragistics.Windows.Editors one. For example the following line causes a “Cannot convert type” error in the suggested sample as well:

var curXCE = curCVP.Editor as Infragistics.Controls.Editors.XamComboEditor;

As you probably know, there are currently two combo editors – XamComboEditor from the Infragistics.Windows.Editors namespace, which is also the one used as an editor for the XamDataGrid, and the XamComboEditor (input)
from the Infragistics.Controls.Editors namespace, which was originally built for Silverlight.

In case you are referencing the InfragisticsWPF4.Controls.Editors.XamComboEditor assembly within your project, please check the namespace declarations to make sure the CellValuePresenter's editor is cast to Infragistics.Windows.Editors.XamComboEditor and let me know if this helps.

If the issue persists, it will be very helpful if you could provide some more details, regarding your code or any additional settings and setup, or attempt to reproduce it in an isolated sample.

Regards,
Bozhidara Pachilova
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460

Offline Thomas Kleist posted over 3 years ago in reply to Bozhidara Pachilova

Hi Bozhidara

I tried to implement your example in my code inside the foreach loop where I loop over datarecords in the xamdatagrid and it was in visual studio where it came with the cast exception
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Offline Bozhidara Pachilova posted over 3 years ago in reply to Thomas Kleist
Hello Thomas,

Thank you for following up.

On my side, everything works as expected and I am not able to reproduce a cast error when running the suggested sample. I am testing against version 20.2. Could you please confirm if that is the version you are targeting?

Additionally, I double checked the CellValuePresenter’s Editor type by logging it into the console before casting it to a XamComboEditor and it is indeed Infragistics.Windows.Editors.XamComboEditor:

System.Console.WriteLine(curCVP.Editor.GetType()); XamComboEditor curXCE = curCVP.Editor as XamComboEditor;

Finally, I would like to ask you if there are any specific steps to reproduce this issue, or if you have introduced any modifications in the sample? If so, please, feel free to send it back to me along with the steps to reproduce, so I can further investigate this.

Looking forward to hearing from you.

Best regards,
Bozhidara Pachilova
Associate Software Developer
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Offline Thomas Kleist posted over 3 years ago in reply to Bozhidara Pachilova

When I try your example I get an cannot cast error

XamComboEditor curXCE = curCVP.Editor as XamCombo
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Offline Bozhidara Pachilova posted over 3 years ago
Hello Thomas,

Thank you for reaching out.

You could programmatically set the selected index of a XamComboEditor with the help of its SelectedIndex property, or alternatively set a SelectedItem.

Since your combo is an editor of a field in a XamDataGrid, you can access it from a cell’s CellValuePresenter, which exposes an Editor property. Additionally, based on this forum thread created by you recently, I extended the sample there to programmatically set the selected indexes for each record:

int cnt = 9; foreach (Record rec in this.xdg.Records) { CellValuePresenter curCVP = CellValuePresenter.FromCell((rec as DataRecord).Cells["Label"]); XamComboEditor curXCE = curCVP.Editor as XamComboEditor; curXCE.SelectedIndex = cnt--; // or //curXCE.SelectedItem = (curXCE.ItemsSource as List<string>)[cnt--]; }

You can find the sample attached below. Please, test it on your side and if you require any further assistance on the matter, please let me know.

Best regards,
Bozhidara Pachilova
Associate Software Developer

8547.XDGComboFieldDemo.zip
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