我必須存儲和恢復圖像到/從MySQL數據庫。爲此,我使用此頁上提供的說明:MySQL Forum,我可以通過下面的代碼成功存儲圖片:從MySQL數據庫獲取圖像 - C#
SaveIamge:
void SaveImage()
{
MemoryStream ms = new MemoryStream();
pictureBox1.Image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
cmd = new MySqlCommand("INSERT INTO " + tableName + " (Product, Manufacturer, Description, Price, Image) Values ('New_Product', 'New_Manufacturer', 'New_Description', '0', @Image)", conn);
cmd.Parameters.Add(new MySqlParameter("@Image", Convert.ToBase64String(ms.ToArray())));
cmd.ExecuteNonQuery();
}
但我不能獲取從數據庫中的圖像:我現在用下面的代碼,請檢查什麼是錯在這裏:
GetThumbnail:
void GetThumbnail()
{
string TN = tableNames[comboBox1.SelectedIndex];
cmd = new MySqlCommand("SELECT Image FROM " + tableName + " WHERE Product = " + ProductTitle(), conn);
object imgObj = cmd.ExecuteScalar();
byte[] b = Convert.FromBase64String(Convert.ToString(imgObj));
MemoryStream ms = new MemoryStream(b);
pictureBox2.Image = Image.FromStream(ms);
}
可以調試,看看'imgObj'是得到什麼? – 2012-04-13 16:48:03