A problem in DataGrid

[ImanMahmoud]

I have a datagrid that all of its columns are BoolColumnStyle and its DataSource is a table with no relations. I relate this DG with a counter, when I mark true or false in each DataGridCell the counter adds or subtracts (respectively) a certain number. Also I relate a TreeView with this DataGrid that the previous counter works for each TreeNode under the TopNode in this DataGrid. I use this code to make my datagrid to respond to one click :

**private void dataGrid1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
{
DataGrid.HitTestInfo hti = this.dataGrid1.HitTest(e.X, e.Y);

try 
{						
    if( hti.Type = = DataGrid.HitTestType.Cell ) 
{   	
   int r = (int)hti.Row;
   int c = (int)hti.Column;
	
   DataRow dr = table.Rows\[r\];
   DataColumn dc = table.Columns\[c\];
	
   this.dataGrid1\[r,c\] = !(bool) this.dataGrid1\[r,c\];
    }
 }
 catch(Exception ex ) 
 {	
    MessageBox.Show(ex.ToString()); 
 }

} // dataGrid1_MouseUp**

I have the following problems : 1. The following message appears. I do not know what is the ListManeger or in other words, I do not understand what is the problem. The ListManeger’s position must be equal to the rowNum. Parameter name: rowNum Do you want to correct the value? 2. The DataGrid responds to clicks even when there is no TreeNodes are selected. I want the DataGrid to respond to clicks only when any TreeNode under the TopNode is selected. 3. when the selected TreeNode is changed, I empty the DataGrid by the following code, but the last cell that I add a value to it remains checked :

for(int i=0 ; i

The problems 1 and 3 disturb my counter. Please if there is a solution. Thank you