我无法将组合图像从一个图片框保存到数据库 [英] I cant save combined images from one picturebox to database

问题描述

我不能将组合图像从一个PictureBox保存到数据库

单击btnSave时

错误：'System.NullReferenceException'将pictureBoxNemoone.Image转换为位图时

请帮我保存到数据库

谢谢



我尝试过：

  private   void  btnImgNemoone_Click（ object  sender，EventArgs e）
 {
 OpenFileDialog ofd =  new  OpenFileDialog（）; 
 ofd.Filter =   JPG Files（* .jpg）| * .jpg; 
 ofd.Multiselect =  true ; 
 
 ofd.Title =   ?????? ???? ？; 
 ofd.ShowDialog（）; 
 
  string  fullPath = ofd.FileName; 
  string  directory1; 
 directory1 = fullPath.Substring（ 0 ，fullPath.LastIndexOf（'  \\'））; 
 DirectoryInfo目录= 新 DirectoryInfo（fullPath.Substring（ 0 ，fullPath.LastIndexOf（'  \\'）））; 
 
 List< system.drawing.bitmap> images =  new 列表< system.drawing.bitmap>（）; 
 System.Drawing.Bitmap finalImage =  null ; 
 
 尝试 
 {
  int  width = < span class =code-digit> 0 ; 
  int  height =  0 ; 
 
  foreach （ string  image  in  ofd.FileNames）
 {
 System.Drawing.Bitmap bitmap =  new  System.Drawing.Bitmap（image）; 
 
 width + = bitmap.Width; 
 height = bitmap.Height > 身高？ bitmap.Height：height; 
 
 images.Add（bitmap）; 
} 
 
 finalImage =  new  System.Drawing.Bitmap（width，height）; 
 
 使用（System.Drawing.Graphics g = System.Drawing.Graphics.FromImage（finalImage））
 {
 g.Clear（System.Drawing.Color.Black）; 
 
  int  offset =  0 ; 
  foreach （System.Drawing.Bitmap image  in  images）
 {
 g.DrawImage（image，
  new  System.Drawing.Rectangle（offset， 0  ，image.Width，image.Height））; 
 offset + = image.Width; 
} 
} 
 
 pictureBoxNemoone.Image = finalImage; 
} 
  catch （例外）
 {} 
} 
 
  private   void  btnSave_Click（ object  sender，EventArgs e）
 {
  byte  [] ImgNemooneN; 
 ImgNemooneN =  null ; 
 Bitmap BNemoone =（Bitmap）pictureBoxNemoone.Image; 
 System.IO.MemoryStream MSNemoone =  new  System.IO.MemoryStream（）; 
 BNemoone.Save（MSNemoone，BNemoone.RawFormat）; 
 ImgNemooneN = MSNemoone.GetBuffer（）; 
} 

解决方案

我找到转换编码

  private   void  btnSave_Click（ object  sender，EventArgs e）
 {
  byte  [] ImgNemooneN; 
 ImgNemooneN =  null ; 
 MemoryStream ms =  new  MemoryStream（）; 
 pictureBoxNemoone.Image.Save（ms，ImageFormat.Jpeg）; 
 ImgNemooneN =  new   byte  [ms.Length]; 
 ms.Position =  0 ; 
 ms。阅读（ImgNemooneN， 0 ，ImgNemooneN.Length）; 

}

I Cant Save Combined Images From One PictureBox To Database
When click btnSave
Error:'System.NullReferenceException' When Convert pictureBoxNemoone.Image To Bitmap
Please Help Me To Save To Database
Thanks

What I have tried:

private void btnImgNemoone_Click(object sender, EventArgs e)
        {
            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Filter = "JPG Files (*.jpg)|*.jpg";
            ofd.Multiselect = true;
            
            ofd.Title = "?????? ??? ?????";
            ofd.ShowDialog();

            string fullPath = ofd.FileName;
            string directory1;
            directory1 = fullPath.Substring(0, fullPath.LastIndexOf('\\'));
            DirectoryInfo directory = new DirectoryInfo(fullPath.Substring(0, fullPath.LastIndexOf('\\')));

            List<system.drawing.bitmap> images = new List<system.drawing.bitmap>();
            System.Drawing.Bitmap finalImage = null;

            try
            {
                int width = 0;
                int height = 0;

                foreach (string image in ofd.FileNames)
                {
                    System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(image);

                    width += bitmap.Width;
                    height = bitmap.Height > height ? bitmap.Height : height;

                    images.Add(bitmap);
                }

                finalImage = new System.Drawing.Bitmap(width, height);

                using (System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(finalImage))
                {
                    g.Clear(System.Drawing.Color.Black);

                    int offset = 0;
                    foreach (System.Drawing.Bitmap image in images)
                    {
                        g.DrawImage(image,
                          new System.Drawing.Rectangle(offset, 0, image.Width, image.Height));
                        offset += image.Width;
                    }
                }

                pictureBoxNemoone.Image = finalImage;
            }
            catch (Exception)
            {}
        }

        private void btnSave_Click(object sender, EventArgs e)
        {
            byte[] ImgNemooneN;
            ImgNemooneN = null;
            Bitmap BNemoone = (Bitmap)pictureBoxNemoone.Image;
            System.IO.MemoryStream MSNemoone = new System.IO.MemoryStream();
            BNemoone.Save(MSNemoone, BNemoone.RawFormat);
            ImgNemooneN = MSNemoone.GetBuffer();
        }

解决方案

I'm Find Coding For Convert

private void btnSave_Click(object sender, EventArgs e)
{
    byte[] ImgNemooneN;
    ImgNemooneN = null;
    MemoryStream ms = new MemoryStream();
    pictureBoxNemoone.Image.Save(ms, ImageFormat.Jpeg);
    ImgNemooneN = new byte[ms.Length];
    ms.Position = 0;
    ms.Read(ImgNemooneN, 0, ImgNemooneN.Length);

}

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