Question

我正在尝试保存像bmp，jpg，gif和amp; png进入sql server数据库。但无法将所有格式保存到数据库中。只有png图像被保存到数据库中。如果试图保存jpeg，.bmp＆amp; .gif图片，它显示错误＆＃34; GDI +＆＃34;中出现一般错误。有什么问题？

private void InitializeOpenFileDialog()
{
 try
    {
      this.openFileDialog1 = new OpenFileDialog();

       // Set the file dialog to filter for graphics files. 
       this.openFileDialog1.Filter = "Images (*.BMP;*.JPG;*.GIF;*.PNG)|*.BMP;*.JPG;*.GIF;*.PNG|" + "All files (*.*)|*.*";
       //"image files|*.jpg;*.png;*.gif;*.bmp;.*;";
       // Allow the user to select multiple images. 
       this.openFileDialog1.Multiselect = true;
       this.openFileDialog1.Title = "My Image Browser";
      }
  catch(Exception es){
       MessageBox.Show(es.Message);
                   }

  }

//load picture
        private void button1_Click(object sender, EventArgs e)
        {
            openFileDialog1.ShowDialog();
        }
 private void button2_Click(object sender, EventArgs e)
        {             

         try
          {
           MemoryStream ms1 = new MemoryStream();

           pictureBox2.Image.Save(ms1, System.Drawing.Imaging.ImageFormat.Jpeg);
           // byte[] img_arr1 = ms1.ToArray();
          byte[] img_arr1 = new byte[ms1.Length];
          ms1.Read(img_arr1, 0, img_arr1.Length);
          SqlConnection con = new SqlConnection(@"data source=xdfgh\ALEXDAVE;database=x1234;UID=sa;password=x67890");
          con.Open();
          SqlCommand cmd = new SqlCommand("insert into myTable(enrolmentno,aadhaarno,name,fname,address,dob,gender,picimage)values(@a,@b,@c,@d,@e,@f,@g,@h)", con);
          cmd.Parameters.AddWithValue("@a", enrolmentno_txt.Text);
          cmd.Parameters.AddWithValue("@b", aadhaarno_txt.Text);
          cmd.Parameters.AddWithValue("@c", name_txt.Text);
          cmd.Parameters.AddWithValue("@d", fname_txt.Text);
          cmd.Parameters.AddWithValue("@e", address_txt.Text);
          cmd.Parameters.AddWithValue("@f", dateTimePicker1.Text);
          cmd.Parameters.AddWithValue("@g", gender);
          cmd.Parameters.AddWithValue("@h", img_arr1);
          int result = cmd.ExecuteNonQuery();
          if (result > 0)
            MessageBox.Show("Data inserted successfully");
          else
            MessageBox.Show("Data is not inserted in database");
          con.Close();                
            }
            catch(Exception es){
            MessageBox.Show(es.Message);
            }
}

        }

private void openFileDialog1_FileOk(object sender, CancelEventArgs e)
        {
            this.Activate();
            string[] files = openFileDialog1.FileNames;

            try
            {
                foreach (string file in files)
                {
                    FileInfo fileInfo = new FileInfo(file);
                    FileStream fileStream = fileInfo.OpenRead();
                    pictureBox2.Image = Image.FromStream(fileStream);
                    Application.DoEvents();
                    fileStream.Close();

                }
            }
                //es
            catch (Exception)
            {
                MessageBox.Show("please select only image files.");
            }
        }

Answer 1

你确定图像有效吗？您收到错误的是哪一行？与错误指示一样，它是GDI错误，而不是SQL错误。

您可以通过替换以下代码行来删除对GDI的需求

MemoryStream ms1 = new MemoryStream();
pictureBox2.Image.Save(ms1, System.Drawing.Imaging.ImageFormat.Jpeg);
byte[] img_arr1 = new byte[ms1.Length];
ms1.Read(img_arr1, 0, img_arr1.Length);

用这个

byte[] img_arr1 = System.IO.File.ReadAllBytes(fileName);

其中fileName是已选择的文件

如何使用winform在sql server中保存图像？

1 个答案: