BindingList and ArgumentOutOfRange when bound to DataGridView

[Jim Balo]

Hi,

When I bind a BindingList<to a DataGridView and then call RemoveAt(n) on
it, I get ArgumentOutOfRange. Could someone explain why?

Sample:

public partial class TestForm2 : Form
{
private BindingList<Person_personList = new BindingList<Person>();

public TestForm2()
{
InitializeComponent();
}

private void TestForm2_Load(object sender, EventArgs e)
{
Person personA = new Person("Pete");
Person personB = new Person("James");
_personList.Add(personA);
_personList.Add(personB);

uxTestGrid.DataSource = _personList;
}

private void uxTestButton_Click(object sender, EventArgs e)
{
_personList.RemoveAt(0);
}
}

public class Person
{
public string Name = "";
public Person(string name)
{
Name = name;
}
}

So I have two Person objects in the BindingList. Yet, when I call
_personList.RemoveAt(0) (or 1), I get this exception. If I do not bind it
to the DataGridView, it works fine.

Please help.

Thanks,
Jim

[=?Utf-8?B?TW9ydGVuIFdlbm5ldmlrIFtDIyBNVlBd?=]

Hi Jim,

I'm not exactly sure of this, but I think because Person does not have any
properties it is not visible in the DataGridView, and internally the
DataGridView operates on an empty Person-list. When the datasource removes
one item the DataGridView does not have any items to remove.

If you add a property to Person, it should work fine.

public class Person
{
private string _name;

public string Name
{
get { return _name; }
set { _name = value; }
}

public Person(string name)
{
Name = name;
}
}
--
Happy Coding!
Morten Wennevik [C# MVP]
"Jim Balo" wrote:

Hi,

When I bind a BindingList<to a DataGridView and then call RemoveAt(n) on
it, I get ArgumentOutOfRange. Could someone explain why?

Sample:

public partial class TestForm2 : Form
{
private BindingList<Person_personList = new BindingList<Person>();

public TestForm2()
{
InitializeComponent();
}

private void TestForm2_Load(object sender, EventArgs e)
{
Person personA = new Person("Pete");
Person personB = new Person("James");
_personList.Add(personA);
_personList.Add(personB);

uxTestGrid.DataSource = _personList;
}

private void uxTestButton_Click(object sender, EventArgs e)
{
_personList.RemoveAt(0);
}
}

public class Person
{
public string Name = "";
public Person(string name)
{
Name = name;
}
}

So I have two Person objects in the BindingList. Yet, when I call
_personList.RemoveAt(0) (or 1), I get this exception. If I do not bind it
to the DataGridView, it works fine.

Please help.

Thanks,
Jim