Question : C# -- dataGridViewTextBoxColumn -- STRING Value ?

How can I get the STRING value of "dataGridViewTextBoxColumn8" ?
The below fails

                            gML_ROITEMTableAdapter.UpdateRomID(iGML_ROMSTR_ID, RoID, this.dataGridViewTextBoxColumn8.Selected.ToString(), this.dataGridViewTextBoxColumn7.ToString(), decimal.Parse(this.dataGridViewTextBoxColumn6.ToString()));

Answer : C# -- dataGridViewTextBoxColumn -- STRING Value ?

can you post your aspx and codefile?