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GridViewComboBoxColumn shows empty rows

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GridView
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Jay
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Jay asked on 28 Oct 2009, 09:28 PM
I am trying similar to this code to show data in gridcombo but it shows empty rows. The number of rows in combo matches with number of List<> items but all are blank. I tried this in SL 3 Q2 and also in Q3 beta.

Can you please provide working sample? Also in demo can you please point where I can find similar sample?

GridViewComboBoxColumn comboColumn = new GridViewComboBoxColumn();
             comboColumn.HeaderText =
"Country";
             comboColumn.DataMemberBinding =
new Binding("CountryID");
             comboColumn.ItemsSource = GetCountries();
             comboColumn.DisplayMemberPath =
"Name";
             comboColumn.SelectedValueMemberPath  =
"ID";
             
this.RadGridView1.Columns.Add(comboColumn);

private System.Collections.IEnumerable GetCountries()
         {
             List<Country> countries =
new List<Country>();
             countries.Add(
new Country(){ID=0, Name = "Germany"});
             countries.Add(
new Country(){ID=1, Name = "Spain"});
             countries.Add(
new Country(){ID=2, Name = "UK"});
             
return countries;
         }

Thanks,
Jay

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Pavel Pavlov
Telerik team
answered on 30 Oct 2009, 02:19 PM

Hello Jay,

Your code is absolutely OK. If you click on a cell to start edit you should see the combo box editor .

Now the problem is in the display mode of the cells. I am wondering why do you not see any value.

Things you should check first are :
1. Does the CountryID column contain valid values ( e.g. integers in the range 0-2)
2. Is the type of the CoutryId column Integer or by accident  a string ?

For your reference I am attaching  a sample illustrating a combo box column in action.

* Note that when using GridViewComboBox column the ComboBox editor is visible when the cell is in edit mode.

Greetings,

Pavel Pavlov
the Telerik team

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Gio
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answered on 24 Nov 2011, 04:13 PM
Resolved without static resource, but with cellTemplate.
This template is used only for view data, while on edit is used the combo box.

<tlk:GridViewComboBoxColumn Header="Categoria"
    ItemsSource="{Binding Path=EntitiesAdditional[Categorie], Mode=TwoWay}"
    DataMemberBinding="{Binding Path=Categorie, Mode=TwoWay}"
    DisplayMemberPath="Nome"
        <tlk:GridViewColumn.CellTemplate
            <DataTemplate
                <TextBlock Text="{Binding Categorie.Nome}"></TextBlock
            </DataTemplate>  
        </tlk:GridViewColumn.CellTemplate
</tlk:GridViewComboBoxColumn>
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Jay
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Pavel Pavlov
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Gio
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