datagridview只允许单选

        private void dataGridViewTemplate_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {
            if (e.ColumnIndex != 0)
            {
                string buttonText = this.dataGridViewTemplate.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString();
                if (buttonText == "预览")
                {
                    FormTemplatePreview fromTemplatePreview = new FormTemplatePreview(this.dataGridViewTemplate.CurrentRow.Cells[2].Value.ToString(), this.dataGridViewTemplate.CurrentRow.Cells[3].Value.ToString());
                    fromTemplatePreview.Show();
                }
                for (int i = 0; i < this.dataGridViewTemplate.Rows.Count; i++)
                {
                    this.dataGridViewTemplate.Rows[i].Cells[0].Value = false;
                }
                this.dataGridViewTemplate.Rows[e.RowIndex].Cells[0].Value = true;
            }
            else
            {
                for (int i = 0; i < this.dataGridViewTemplate.Rows.Count; i++)
                {
                    this.dataGridViewTemplate.Rows[i].Cells[0].Value = false;
                }
                this.dataGridViewTemplate.Rows[e.RowIndex].Cells[e.ColumnIndex].Value = true;
            }
            
        }