[一篮饭特稀原创，转载请注明出自http://www.cnblogs.com/wanghafan/p/3227351.html]
 1 private void ChangBackColor()

 {

     if (dataGridView1.Rows.Count > )

     {

         foreach (DataGridViewRow row in dataGridView1.Rows)

         {

             if (row.Cells["列名"].Value.ToString() == "条件")

             {

                 row.Cells["列名"].Style.ForeColor = System.Drawing.Color.Red;

                 row.DefaultCellStyle.ForeColor = Color.Red; //改变整行的

             }

         }

         DataGridViewCellStyle dgvcs = new DataGridViewCellStyle();

         dgvcs.BackColor = Color.Green;

         dataGridView1.Columns["列名"].DefaultCellStyle = dgvcs;  //整列

     }

 }