Question of state with DataGridView

[moMoney2009]

Got a tricky one that seems to deal with state ... and I don't know the underlying infrastructure of C# well enough to know the answer.

so whenever a cell is clicked ... the row number is saved in a list (rowsSelected) but whenever CustomerDelete_deleteBtn_Click is called when the deleteBtn is clicked ... it will execute the callback method correctly BUT rowsSelected is empty ... what is going on here?

by the way, i have made sure that items are actually being added to the list inside of dataGridView1_CellClick. Thanks

Side note: Class B contains an instance of Class A, thus, the linkage.

CLASS A

//CALLBACK METHODS
        /***************************************************************/

        /* Will add the row number to rowsSelected whenever a row is clicked.
         * Will remove the row number if clicked again.*/
        private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            currRow = e.RowIndex;
            bool flag = true;
            int pos = 0;
            List<int>.Enumerator top = rowsSelected.GetEnumerator();
            while ((top.MoveNext()) && (flag))
            {
                if (top.Current == currRow)
                {
                    rowsSelected.RemoveAt(pos);
                    flag = false;
                }
                pos++;
            }
            if (flag)
                rowsSelected.Add(currRow);
        }

        public void CustomerDelete_deleteBtn_Click(object sender, EventArgs e)
        {
            if (rowsSelected.Count > 0)
            {
                string tempStr = "";
                Utilites.ModalDialog temp = new TheMockElectricCompany.Utilites.ModalDialog();
                temp.ShowDialog();
                if (temp.DialogResult == DialogResult.Yes)
                {
                    //string[] param = new string[7];
                    List<int>.Enumerator top = rowsSelected.GetEnumerator();
                    while (top.MoveNext())
                    {
                        int row = top.Current;
                        for (int col = 0; col < rowsSelected.Count; col++)
                            tempStr += dataGridView1[col,row].Value + "  ";
                        MessageBox.Show(tempStr);
                    }
                }
                //param[column] = (string)customerGrid[column, row].Value;
                /*string fName = (string)customerGrid[0,row].Value;
                string lName = (string)customerGrid[1, row].Value;
                string addr = (string)customerGrid[2, row].Value;
                string zip = (string)customerGrid[3, row].Value;
                string city = (string)customerGrid[4, row].Value;
                string state = (string)customerGrid[5, row].Value;
                string pNum = (string)customerGrid[6, row].Value;
                MessageBox.Show(fName + " " + lName + " " + addr + " " + zip + " " + city + " " + state + " " + pNum);*/

            }
        }

CLASS B

public partial class CustomerDelete : Form
    {
        private MainForm parentForm;
        private int row, col;
        private MECDataGridView dataGridView;

        public CustomerDelete(MainForm parentForm)
        {
            InitializeComponent();
            

            this.dataGridView = new MECDataGridView();
            this.parentForm = parentForm;
            //this.row = NOT_SELECTED;
            //this.col = NOT_SELECTED;

            InitializeDelegates();
        }

        private void InitializeDelegates()
        {
            /*Will Callback to referenced method in this class from SearchPanel 
             *class whenever searchBtn is clicked*/
            searchPanel1.AddCallbackToSearchClick(new EventHandler(searchBtn_Clicked));

            /*Will callback to MECDataGridView class where the referenced 
             *method exists.*/
            this.deleteBtn.Click += new EventHandler(this.dataGridView.CustomerDelete_deleteBtn_Click); ;
        }

 

[MadJock]

Not done much UI in VS2005. In VS2003 got round this by:

On cell_click() store the selected row in a private int. Refer to the private member in the _delete() mthod.

Hope this helps.

Graeme

"Just beacuse you're paranoid, don't mean they're not after you