CODEWITHSUNDEEP
c#.netwpf
Kajbo
Kajbo

Reputation: 1158

WPF bind data grid combo box column programmatically to itemsource

In my datagrid, one of columns is DataGridComboBoxColumn, where I'm trying to display different drop down menu in every row. Easy task when creating combo box in XAML instead of doing it programatically. My problem is that I have no idea how to bind it properly. This is what I tried:

private DataGridComboBoxColumn CreateComboValueColumn(List<Elements> elements)
{
    DataGridComboBoxColumn column = new DataGridComboBoxColumn();
    column.ItemsSource = elements;
    column.DisplayMemberPath = "Text";
    column.SelectedValuePath = "ID";
    column.SelectedValueBinding = new Binding("Value");
    return column;
}

public class Elements
{
    public string Name { get; set; }
    public string Value { get; set; }
    public string Comment { get; set; }
    public List<ComboItem> ComboItems { get; set; }
}

public class ComboItem
{
    public string ID { get; set; }
    public string Text { get; set; }
}

Upvotes: 1

Views: 1797

Answers (3)

Razali Husain
Razali Husain

Reputation: 1

You can use the following as an example:

    ComboBox dgvCmb = new ComboBox();
    dgvCmb.Name = "Name";
    dgvCmb.Items.Add("Razali");
    dgvCmb.Items.Add("Boeing");
    dgvCmb.Items.Add("Londang");
    dgvCmb.Items.Add("MCKK");
    
    DataGridComboBoxColumn   dgc=new DataGridComboBoxColumn();
    dgc.Header = "Test";
    dgc.ItemsSource = dgvCmb.Items;
    dataGrid.Columns.Add(dgc);

Upvotes: 0

Kajbo
Kajbo

Reputation: 1158

It seems that adding binding from style works better than direct approach. This works:

private DataGridComboBoxColumn CreateComboValueColumn(List<Elements> elements)
{
    DataGridComboBoxColumn column = new DataGridComboBoxColumn();

    Style style = new Style(typeof(ComboBox));
    //set itemsource = {Binding ComboItems}
    style.Setters.Add(new Setter(ComboBox.ItemsSourceProperty, new Binding("ComboItems")));
    column.DisplayMemberPath = "Text";
    column.SelectedValuePath = "ID";
    column.SelectedValueBinding = new Binding("Value");

    column.ElementStyle = style;
    column.EditingElementStyle = style;
    return column;
}

Upvotes: 0

Juan Carlos Rodriguez
Juan Carlos Rodriguez

Reputation: 784

You have to think from above and read what you are doing.

    column.ItemsSource = elements;

That sets your column itemssource to a list of elements.

column.DisplayMemberPath = "Text";

It's not a member of Element so it won't show anything. You should set your column.ItemsSource to:

column.ItemsSource = elements[i].ComboItems

Being "i" the element you want to show.

Then if you want to show the text you should:

    column.DisplayMemberPath = "Text";

If you want the Id then just:

    column.DisplayMemberPath = "ID";

I wrote this without any editor and I think this is close to the answer you want, if I'm wrong comment this and I'll try to answer in a more accurate way.

Upvotes: 1

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