CODEWITHSUNDEEP
c#.netwinformscomboboxpropertygrid
Romz
Romz

Reputation: 1457

BindingSource to ComboBox and [Browsable(false)] property to PropertyGrid don't work together

I will try to explain my issue.

I have got a class:

public class Person()
{
        [Browsable(false)]
        public Int32 Id { get; set; }

        public string Name { get; set; }

        //...
}

I use PropertyGrid control to show Name field, but I don't need to show Id, so I set Browsable property to false like this: 

[Browsable(false)]
public Int32 Id { get; set; }

In my GUI I present all elements of Person class in ListView control, and when an element is selected I show properties in PropertyGrid control like this:

void ListView_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
   this.propertyGrid.SelectedObject = (object)this.listView.SelectedObject;
}

Everything works fine, PropertyGrid shows only field Name.

Then I need to use ComboBox control like this:

List<Person> people = new List<Person>();
people.Add(...)
//.....

this.comboBox.DataSource = new BindingSource(people, null);
this.comboBox.ValueMember = "Id"; // here an exeption has been thrown !!!
this.comboBox.DisplayMember = "Name";

And on line this.comboBox.ValueMember = "Id"; got this error:

An unhandled exception of type 'System.ArgumentException' occurred in System.Windows.Forms.dll

Additional information: Cannot bind to the new display member.

How to resolve this problem ?

PS: If I remove [Browsable(false)] line everything works fine, but Id field in PropertyGrid control will be shown

Upvotes: 1

Views: 6082

Answers (1)

LarsTech
LarsTech

Reputation: 81675

I duplicated the problem, and I solved it by setting the DataSource after setting the DisplayMember and ValueMember properties:

comboBox1.DisplayMember = "Name";
comboBox1.ValueMember = "Id";
comboBox1.DataSource = new BindingSource(people, null);

Upvotes: 5

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