Datagrid view problem please help me its urgent

[selvakumari]

i am getting an exception while end editing the 1st column 1st row of the cell(1,1) it is a combobox cell of datagridview everytime it showing following exception only on endedit

dont know why can anybody help me plz

"Operation not valid because it results in reentrant call to the SetCurrentCellAddress core function"

ArrayList taName = (ArrayList)_responseparser.tableEnum[r];
ArrayList taValue = (ArrayList)_responseparser.tableValue[r];
DataGridViewComboBoxCell comboCell = new DataGridViewComboBoxCell();
for (int s = 0; s < taName.Count; s++)
{
    comboCell.Items.Add(taName[s]);
}
dataGridView1[1, r] = comboCell;
id = (ushort)_responseparser.tableId[r];
data = CommMngr.SelectedUnit.Modbus.GetParameter(id);
for (int m = 0; m < taName.Count; m++)
{
    if (data != null)
    {
        if (data[0] == Convert.ToInt32(taValue[m]))
        {
            dataGridView1[1, r].Value = (string)taName[m];
            break;
        }
    }
}
 

the bolded line arising the exception EDIT: that would be line 8

can anyone help me plz...............

[Curtis Rutland]

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[Plater]

What is this _responseparser.tableId[r]; buisness?
What type of object is _responseparser?
And the tableid[r] is?

[selvakumari]

What is this _responseparser.tableId[r]; buisness?
What type of object is _responseparser?
And the tableid[r] is?

_responseparser is a class object
and tableid[r]is a property from that class

[selvakumari]

Please help me in this Exception

else if (_responseparser.tableType[r].ToString() == NONENUMERICAL)
            {
                dataGridView1.Rows[r].Cells[0].Value = _responseparser.tableName[r];
                int valueCount = _responseparser.tableValue.Count;
                if (valueCount != 0)
                {
                    ArrayList taName = (ArrayList)_responseparser.tableEnum[r];
                    ArrayList taValue = (ArrayList)_responseparser.tableValue[r];
                    DataGridViewComboBoxCell comboCell = new DataGridViewComboBoxCell();
                    for (int s = 0; s < taName.Count; s++)
                    {
                        comboCell.Items.Add(taName[s]);
                    }
                     dataGridView1[1, r] = comboCell;
                    id = (ushort)_responseparser.tableId[r];
                    data = CommMngr.SelectedUnit.Modbus.GetParameter(id);
                    for (int m = 0; m < taName.Count; m++)
                    {
                        if (data != null)
                        {
                            if (data[0] == Convert.ToInt32(taValue[m]))
                            {
                                dataGridView1[1, r].Value = (string)taName[m];
                                break;
                            }
                        }
                    }
                }
            }

exception is at bolded line

"Operation not valid because it results in reentrant call to the SetCurrentCellAddressCore Function"

only on editing the cell[1,1] with cell end edit

[Plater]

It sounds like you have a funcion that gets called when the data in a cell changes, and in that function you are setting one of the cells. I think it is sync-locking the cells implicitly and it's telling you what you are trying to do would break that sync lock.
(Like if you are using a foreach loop and try to remove something from the collection you are looping through, it gets mad)

[selvakumari]

It sounds like you have a funcion that gets called when the data in a cell changes, and in that function you are setting one of the cells. I think it is sync-locking the cells implicitly and it's telling you what you are trying to do would break that sync lock.
(Like if you are using a foreach loop and try to remove something from the collection you are looping through, it gets mad)

private void DataColumnAdd(int r)
        {
            ushort id, scalefactor;
            ushort[] data = new ushort[8];
            double sValue;
            if (_responseparser.tableType[r].ToString() == NUMERICAL)
            {
                dataGridView1.Rows[r].Cells[0].Value = _responseparser.tableName[r];
                id = (ushort)_responseparser.tableId[r];
                data = CommMngr.SelectedUnit.Modbus.GetParameter(id);
                if (data != null)
                {
                    //dataGridView1.Rows[r].Cells[1].Value = data[0];
                    scalefactor = ushort.Parse(_responseparser.tableScaleFactor[r].ToString());
                    decimal dispValue = ((decimal)data[0] / (decimal)scalefactor);
                    string decimalAdjusted = dispValue.ToString("N1");
                    bool disValue = double.TryParse(decimalAdjusted, out sValue);
                    if (disValue)
                    {
                        dataGridView1.Rows[r].Cells[1].Value = decimalAdjusted;
                    }
                }
                else
                {
                    dataGridView1.Rows[r].Cells[1].Value = "null";
                }
                dataGridView1.Rows[r].Cells[2].Value = _responseparser.tableUnit[r];
            }
            else if (_responseparser.tableType[r].ToString() == NONENUMERICAL)
            {
                dataGridView1.Rows[r].Cells[0].Value = _responseparser.tableName[r];
                int valueCount = _responseparser.tableValue.Count;
                if (valueCount != 0)
                {
                    ArrayList taName = (ArrayList)_responseparser.tableEnum[r];
                    ArrayList taValue = (ArrayList)_responseparser.tableValue[r];
                    DataGridViewComboBoxCell comboCell = new DataGridViewComboBoxCell();
                    for (int s = 0; s < taName.Count; s++)
                    {
                        comboCell.Items.Add(taName[s]);
                    }
                    dataGridView1[1, r] = comboCell;
                    id = (ushort)_responseparser.tableId[r];
                    data = CommMngr.SelectedUnit.Modbus.GetParameter(id);
                    for (int m = 0; m < taName.Count; m++)
                    {
                        if (data != null)
                        {
                            if (data[0] == Convert.ToInt32(taValue[m]))
                            {
                                dataGridView1[1, r].Value = (string)taName[m];
                                break;
                            }
                        }
                    }
                }
            }
            else if (_responseparser.tableType[r].ToString() == EMPTYDATASET)
            {
                dataGridView1.Rows[r].Cells[0].Value = "Method";
                dataGridView1.Rows[r].Cells[0].Style.BackColor = Color.LightGray;
                dataGridView1.Rows[r].Cells[1].ReadOnly = true;
                dataGridView1.Rows[r].Cells[1].Style.BackColor = Color.LightGray;
                dataGridView1.Rows[r].Cells[1].Value = _responseparser.tableName[r];
            }
        }

this is the that function initially i populate a datagridview and then upon editing again i am populating datagridview, i understand ur statements,

but if i am changing the collection means it should happen when i am editing all the comboboxcells but i am getting that exception whenever i am editing comboboxcell at [1,1] everytime thats what i get confused

could u tell me where i should make changes?