[Mono-bugs] [Bug 486881] New: DataGridView: Use of DataGridViewTextBoxColumn causes CurrentRow and CurrentCell to be invalid in VisibleChanged Event Handler

[bugzilla_noreply at novell.com]

https://bugzilla.novell.com/show_bug.cgi?id=486881


           Summary: DataGridView: Use of DataGridViewTextBoxColumn causes
                    CurrentRow and CurrentCell to be invalid in
                    VisibleChanged Event Handler
    Classification: Mono
           Product: Mono: Class Libraries
           Version: SVN
          Platform: Other
        OS/Version: Other
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: Windows.Forms
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: tom_hindle at sil.org
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---


User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.7)
Gecko/2009030422 Ubuntu/8.04 (hardy) Firefox/3.0.7

Sample code which demostrates the problem.
In .NET CurrentRow and CurrentCell are valid refs, in mono they are both null.

using System;
using System.Drawing;
using System.Windows.Forms;

class MyDataGridView : DataGridView
{

    public MyDataGridView()
    {
        AllowUserToAddRows = false;        
    }

    protected override void OnHandleCreated(EventArgs e)
    {
        DataGridViewColumn wsCol = new DataGridViewColumn();

        wsCol.AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells;           
        wsCol.DefaultCellStyle.ForeColor = SystemColors.ControlText;
        wsCol.DefaultCellStyle.BackColor = SystemColors.Control;
        wsCol.ReadOnly = true;
        wsCol.CellTemplate = new DataGridViewTextBoxCell();
        Columns.Insert(0, wsCol);

        base.OnHandleCreated(e);
    }

    protected override void OnVisibleChanged(EventArgs e)
    {    
        base.OnVisibleChanged(e);

        DataGridViewColumn col = new DataGridViewTextBoxColumn();
        Columns.Add(col);        

        Rows.Add(new DataGridViewRow());

        Console.WriteLine(CurrentRow != null);
        Console.WriteLine(CurrentCell != null);
    }
}


public class Form1 : System.Windows.Forms.Form
{
    public Form1()
    {
        this.Load += new EventHandler(Form1_Load);
    }    

    private void Form1_Load(System.Object sender, System.EventArgs e)
    {
        DataGridView grid = new MyDataGridView();    
        this.Controls.Add(grid);
    }

    [STAThreadAttribute()]
    static void Main()
    {
        Application.Run(new Form1());
    }
}


Reproducible: Always

Steps to Reproduce:
1. Compile and run Sample code
2.
3.
Actual Results:  
False
False

Expected Results:  
True
True

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