Check If All Values in a Column of a Gridview are the same

Question

Hello guys I need your help again.

 

I have a gridview and one column has a boolean value. Now, If all rows in that column equals to TRUE, I will do my stuff.

 

protected void gvQuotationDetails_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            if(e.Row.RowType == DataControlRowType.DataRow)
            {
                CheckBox cbNego = (CheckBox)e.Row.FindControl("cbNegotiate");
                CheckBox cbApp = (CheckBox)e.Row.FindControl("cbApprove");

                if (cbNego.Checked)
                {
                    cbNego.Enabled = false;
                }

                if (cbApp.Checked)
                {
                    cbApp.Enabled = false;
                    cbNego.Enabled = false;
                }

                // if all row values in cbApp == true,
                //update quotation header
            }
        }

 

 

Thanks a lot.