GridviewCombobox with multiple data source

[Apoorva]

Hi
I am using a WPF Telerik Gridview control and one of the columns is a GridviewCombobox
Is it possible to have it so that each row in the data grid can have a Combobox with its own data source values?
E.g. Row 1 will have a combo box containing list of Countries and Row 2 will have a combobox containing list of Continents?
Not related in any way.

Thanks.

[Maya]

Hi Apoorva,

You may set the ItemsSourceBinding of the column. For a sample project illustrating the implementation, please refer to this forum thread. You may take a look at this blog post as well.

Regards,
Maya
the Telerik team

[Apoorva]

Hi Maya
Thanks for the response.
I tried to set the ItemsSourceBinding for the combo box but it didnt quite work.
This is the sample code:

<telerik:RadGridView HorizontalAlignment="Left" Margin="12,24,0,0" Name="radGridView1" VerticalAlignment="Top" Width="387"
                     ItemsSource="{Binding DatabaseParams}" AutoGenerateColumns="False" Height="201"
             ShowGroupPanel="False" RowIndicatorVisibility="Collapsed" >
    <telerik:RadGridView.RowStyle>
        <Style TargetType="telerik:GridViewRow">
            <Setter Property="MinHeight" Value="40"></Setter>
        </Style>
    </telerik:RadGridView.RowStyle>
    <telerik:RadGridView.AlternateRowStyle>
        <Style TargetType="telerik:GridViewRow">
            <Setter Property="MinHeight" Value="40"></Setter>
            <Setter Property="Background" Value="AliceBlue"></Setter>
        </Style>
    </telerik:RadGridView.AlternateRowStyle>
    <telerik:RadGridView.Columns>
        <telerik:GridViewDataColumn Header="Param Name" DataMemberBinding="{Binding Name}" Width="150" />
        <telerik:GridViewComboBoxColumn Header="Param Value" DataMemberBinding="{Binding Value}" ItemsSourceBinding="{Binding ParamValues}" UniqueName="ParamValue" SelectedValueMemberPath="Value" DisplayMemberPath="Description" Width="230" />

    </telerik:RadGridView.Columns>

</telerik:RadGridView>

and the code for the classes is here:

    public class DatabaseParamValue
    {
        public string Description { get; set; }
        public string Value { get; set; }

        public DatabaseParamValue(string description, string value)
        {
            Description = description;
            Value = value;
        }
    }
    public class DatabaseParam
    {
        public string Name { get; set; }
        public string Value { get; set; }

        public List<DatabaseParamValue> ParamValues;
    }
}

This is what I do at the form load:

List<DatabaseParam> DatabaseParams = new List<DatabaseParam>();
DatabaseParam param = new DatabaseParam();
param.Name = "Row-1";
param.Value = "2";
param.ParamValues = new List<DatabaseParamValue>();
param.ParamValues.Add(new DatabaseParamValue("Name-1", "1"));
param.ParamValues.Add(new DatabaseParamValue("Name-2", "2"));
param.ParamValues.Add(new DatabaseParamValue("Name-3", "3"));
DatabaseParams.Add(param);

DatabaseParam param2 = new DatabaseParam();
param2.Name = "Row-2";
param2.Value = "12";
param2.ParamValues = new List<DatabaseParamValue>();
param2.ParamValues.Add(new DatabaseParamValue("Name-21", "11"));
param2.ParamValues.Add(new DatabaseParamValue("Name-22", "12"));
param2.ParamValues.Add(new DatabaseParamValue("Name-23", "13"));
DatabaseParams.Add(param2);

radGridView1.ItemsSource = DatabaseParams;
radGridView1.Rebind();

Am I missing something?

Regards
Apoorva

[Maya]

Hello Apoorva,

As illustrated in the blog post and the sample project in the forum thread, you need to expose a new property in the business object of the RadGridView. I believe in your case it is DatabaseParam. So, you in the class definition, you may declare a new property DatabaseParamValues and set the ItemsSourceBinding to it. In the sample project - Players and in the blog post - AvailableCountries.  Once you define this property, you may define an expression returning the necessary values depending on each item - just as it is done in the blog post. 
You may also take a look at our online documentation for further reference.

All the best,
Maya
the Telerik team

[Apoorva]

Hi Maya
Many thanks.
I didnt realise that it had to be implemented as a Property. Works now!

Regards
Apoorva