Example of entering, deleting, and modifying new columns in .NET DataGridView

public void subAddColumn(DataGridView grdDataGridView, string sColumnName)
        {
            try
            {
                int nColumnIndex = grdDataGridView.Columns.Count;        //컬럼을 Grid의 제일 뒤(오른쪽)에 추가한다.
                string sColumnHeaderText = "ColumnHeader" + nColumnIndex.ToString();  //ColumnName
                Color dcColumnColor = grdDataGridView.DefaultCellStyle.BackColor;
                
                //아래 Overloading되어 있는 함수를 호출한다.
                subAddColumn(grdDataGridView, sColumnName, nColumnIndex, sColumnHeaderText, dcColumnColor, CellType.TextBox);
            }
            catch
            {
                throw new Exception();
            }
        }

        
        public void subAddColumn(DataGridView grdDataGridView, string sColumnName, int nColumnIndex)
        {
            try
            {
                string sColumnHeaderText = "ColumnHeader" + grdDataGridView.Columns.Count.ToString();  //ColumnName
                Color dcColumnColor = grdDataGridView.DefaultCellStyle.BackColor;

                //아래 Overloading되어 있는 함수를 호출한다.
                subAddColumn(grdDataGridView, sColumnName, nColumnIndex, sColumnHeaderText, dcColumnColor, CellType.TextBox);
            }
            catch
            {
                throw new Exception();
            }
        }

        
        public void subAddColumn(DataGridView grdDataGridView, string sColumnName, int nColumnIndex, string sColumnHeaderText)
        {
            try
            {
                Color dcColumnColor = grdDataGridView.DefaultCellStyle.BackColor;

                //아래 Overloading되어 있는 함수를 호출한다.
                subAddColumn(grdDataGridView, sColumnName, nColumnIndex, sColumnHeaderText, dcColumnColor, CellType.TextBox);
            }
            catch
            {
                throw new Exception();
            }
        }

        
        public void subAddColumn(DataGridView grdDataGridView, string sColumnName, int nColumnIndex, string sColumnHeaderText, Color cColumnColor, CellType ctCellType)
        {
            BindingSource dBS = null;
            DataTable dDT = null;
            DataGridViewColumn dDC = null;
            DataGridViewCell cell = null;

            try
            {
                this.pgrdDataGridView = grdDataGridView;


                if (this.pgrdDataGridView.DataSource.GetType().Name == "DataTable")
                {
                    dDT = (DataTable)this.pgrdDataGridView.DataSource;
                }
                else if (this.pgrdDataGridView.DataSource.GetType().Name == "BindingSource")
                {
                    //DataGridView에 바인딩된 객체가 BindingSource이면 BindingSource로 형변환 후 DataTable을 가져온다.
                    dBS = (BindingSource)this.pgrdDataGridView.DataSource;
                    dDT = (DataTable)dBS.DataSource;
                }

                switch (ctCellType)
                {
                    case CellType.TextBox:
                        dDC = new DataGridViewTextBoxColumn();
                        cell = new DataGridViewTextBoxCell();
                        break;

                    case CellType.CheckBox:
                        dDC = new DataGridViewCheckBoxColumn();
                        cell = new DataGridViewCheckBoxCell();
                        break;

                    case CellType.Image:
                        dDC = new DataGridViewImageColumn();
                        cell = new DataGridViewImageCell();
                        break;

                    case CellType.Button:
                        dDC = new DataGridViewButtonColumn();
                        cell = new DataGridViewButtonCell();
                        break;

                    case CellType.ComboBox:
                        dDC = new DataGridViewComboBoxColumn();
                        cell = new DataGridViewComboBoxCell();
                        break;

                    case CellType.Link:
                        dDC = new DataGridViewLinkColumn();
                        cell = new DataGridViewLinkCell();
                        break;

                    default:
                        break;
                }
                
                dDC.Name = sColumnName;                           //ColumnName
                dDC.HeaderText = sColumnHeaderText;               //Column HeaderText

                cell.Style.BackColor = cColumnColor;
                dDC.CellTemplate = cell;

                this.pgrdDataGridView.Columns.Insert(nColumnIndex, dDC);
            }
            catch(Exception)
            {
                throw new Exception();
            }
        }