点击dgv图片单元格，将该图片在picturebox中显示

private void DataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)

    {  int rowIndex = this.dataGridView1.CurrentRow.Index; // 取得当前单元格的行Index 
    string str=dataGridView1.Rows[rowIndex].Cells["Pic"].Value.ToString();
        byte[] str = Convert.FromBase64String(str);
        Image image=GetImage(str); // 二进制转图片方法GetImage(str)
        this.pictureBox1.Image = image;
        }

//二进制转图片方法GetImage(str)

    public Image GetImage(byte[] str)
    {
        MemoryStream ms = new MemoryStream(str);
        Image img = System.Drawing.Image.FromStream(ms);
        return img;
    }