Properly bind a Windows Forms Datagrid to an array

Question

I'm trying to use a windows forms datagrid (.NET 1.1) to update the elements of a two dimensional array. Using the microsoft documentation, I've been able to get the datagrid to display the array properly.

EDIT: The MS instructions I followed are at http://support.microsoft.com/kb/315786.

class myrow {
   private int a, b;
   public int A {get { return a; } set {a = value;}}
   public int B {get { return b; } set {b = value;}}
}

myrow[] myRows = new myrow[5] {
    new myrow(3,2),
    new myrow(2,2),
    new myrow(1,2),
    new myrow(3,3),
    new myrow(3,1),
}

myDataGrid.SetDataBinding(myRows, "");

I've also got the DataGrid's TableStyle.MappingName property set to "myrow[]".

What's been driving me crazy is that I can't update it. I enter a new value in a cell on the form, say "1123", and hit enter or tab, and the cursor moves to the next cell and the value changes back to the original value.

How can I get it to take the updates?

Answer 1

This is off the top of my head, but I think you need to implement an event that gets fired when you change a grid cell or click the update button.

Answer 2

Unfortunately I can't check it for .NET 1.1, but as for .NET 2.0 control DataGridView which replaced DataGrid, it isn't needed to update data source manually.

Hope this will help you somehow.

Answer 3

There's a workaround, if you change the array to an ArrayList or other collection class, then the updates work.

Not a true answer, because that's still not using the object array, and still doesn't fit well with a regular 2D array of data.

Answer 4

Off the top of my head, I think you need to ... Upgrade to a more recent version of Visual Studio.