c#中将pictureBox中的图片保存到本地中

this.pictureBox.Image.Save("D://你好.jpg");

上面这种方式指定了路径和名称，需要将路径和名称参数化

下面这种方式就更加的灵活

			SaveFileDialog saveImageDialog = new SaveFileDialog();
            saveImageDialog.Title = "图片保存";
            saveImageDialog.Filter = @"jpeg|*.jpg|png|*.png";
            //设置默认文件名（可以不设置）
            saveImageDialog.FileName = "对比曲线图";
            //主设置默认文件extension（可以不设置）
            saveImageDialog.DefaultExt = "jpg";
            if (saveImageDialog.ShowDialog() == DialogResult.OK)
            {
                string fileName = saveImageDialog.FileName.ToString();
                if (fileName != "" && fileName != null)
                {
                    string fileExtName = fileName.Substring(fileName.LastIndexOf(".") + 1).ToString();
                    System.Drawing.Imaging.ImageFormat imgformat = null;
                    if (fileExtName != "")
                    {
                        switch (fileExtName)
                        {
                            case "jpg":
                                imgformat = System.Drawing.Imaging.ImageFormat.Jpeg;
                                break;
                            case "png":
                                imgformat = System.Drawing.Imaging.ImageFormat.Png;
                                break;
                            default:
                                imgformat = System.Drawing.Imaging.ImageFormat.Jpeg;
                                break;
                        }
                        try
                        {
                            Bitmap bit = new Bitmap(pictureBox.Image);
                            MessageBox.Show("保存路径：" + fileName, "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                            pictureBox.Image.Save(fileName, imgformat);
                        }
                        catch
                        {
                            
                        }
                        
                    }
                }
            }