Data grid view selected cell value how to get it

The following piece of code will do the trick for you:

private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
{
    if (dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Value != null)
    {
       MessageBox.Show(dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString());
    }
}

Hope this will help you out.

SelectedRows will return a collection of rows of type DataGridViewSelectedRowCollection and not DataGridViewRow.

So you can use it like this :

DataGridViewSelectedRowCollection rows = dataGridView1.SelectedRows;
string val =(string)rows[2].Cells["Late_Time"].Value; //I have specified rowIndex as 2 as an example

You may have many troubles:
* cell value may be null: test value for null before using ToString()
* column name may be erronous (impossible in your code, I think)...
and after click:
* row index may be -1 eg. when u click column header, not cell: test RowIndex not to be -1 and to be between 0 and row count
* cell index may be -1 eg. when u click row header, not cell: test ColumnIndex as above

Man u need the First Row selected, u can use the index :

dgvrows[0].Cells("Late_Time").value.toString();

Private Sub DataGridView_CellMouseClick1(sender As Object, e As DataGridViewCellMouseEventArgs) Handles DataGridView.CellMouseClick
    Dim val As String = DataGridView.CurrentCell.Value.ToString()

        MsgBox(val)


End Sub

If you set some command argument then,-

int RowIndex = Convert.ToInt32((e.CommandArgument).ToString());

you can use this solution:

DataGridViewCell cell = KdgvAsset.SelectedCells[0] as DataGridViewCell;
string value = cell.Value.ToString();

:)

private void gv_packet_report_SelectionChanged(object sender, EventArgs e)
{
    try
    {
        sum += Convert.ToDouble(gv_packet_report.CurrentCell.Value.ToString());
        label_sum.Text = sum.ToString();
    }
    catch (Exception)
    {

    }
}