Question

private void datagridSignal_MouseMove(object sender, MouseEventArgs e) 
{         this.toolTip.Hide(datagridSignal);         
this.toolTip.RemoveAll();         
DataTable dt = GetSignalTable();         
DataView dv = new DataView(dt);         
Point prop = new Point(e.X, e.Y);         
System.Windows.Forms.DataGrid.HitTestInfo myHitTest;                 
myHitTest = datagridSignal.HitTest(prop.X, prop.Y);         
this.toolTip.SetToolTip(datagridSignal, " ID = '" + (int)dv[myHitTest.Row][0] + "'  '" + myHitTest.Row + "'"); 
} 

this is my code thus far, unfortunately it isn’t providing accurate results.. for some reason it will randomly mix up the order of ID’s even though the correct index is being displayed.

***using datagrid , not datagridview

***visual C# 2.0 in Visualstudio2005 environment

EDIT:

private void dataGridSignal_MouseMove(object sender, MouseEventArgs e)
{
  this.toolTip.Hide(dataGridSignal); 
  this.toolTip.RemoveAll(); 
  System.Windows.Forms.DataGrid.HitTestInfo myHitTest;  
  myHitTest = dataGridSignal.HitTest(e.X, e.Y);
  this.toolTip.SetToolTip(dataGridSignal, " ID = " + ((int)this.GetTable().Rows[myHitTest.Row][0]).ToString() + " "+ myHitTest.Row.ToString());
}

Answer 1

I can’t duplicate it. This worked for me:

void dg_MouseMove(object sender, MouseEventArgs e) {
  this.toolTip1.Hide(dg);
  this.toolTip1.RemoveAll();

  System.Windows.Forms.DataGrid.HitTestInfo myHitTest = dg.HitTest(e.X, e.Y);

  if (myHitTest.Row > -1) {
    this.toolTip1.SetToolTip(dg, "Over " + dt.Rows[myHitTest.Row][0].ToString());
    this.Text = "Over " + dt.Rows[myHitTest.Row][0].ToString();
  }
}

I can only guess that the DataSource that the DataGrid is using is different than the one coming from GetSignalTable. In my example, dt is the DataTable that my DataGrid dg is using.