MVC4上传图像并插入数据库

Question

我前段时间在 MVC4 Visual Studio 工作。我在这方面真的很新，希望任何人都可以帮助我。

我的网站中有一个表单，其中输入 type="text" 和 input type="file"。

我想在我的数据库中插入一个包含多个图像上传的新项目。

我尝试在视图、控制器和模型中这样做。

我搜索了一些东西并找到了一个对上传几张图片有很大帮助的代码。

但我想要的是，当我单击按钮时，上传所有图像并将来自其他字段的所有信息和所有图像的文件名插入到我的表中。所以我可以在另一个页面中选择与此 ID 关联的所有图像。

希望有人可以帮助解决这个问题。

这是我的代码：

提前致谢

查看：

@using (Html.BeginForm("Uploading", "AdicionarRevista", FormMethod.Post, new { enctype = "multipart/form-data" }))
{

<label for="file">Nome da Empresa:</label>   
<input type="text" name="Name" id="nome" /><br />

<label for="file">Titulo da Revista:</label>       
<input type="text" name="Title" id="titulo" /> <br />

<label for="file">Upload:</label>         
<input type="file" name="ImageUploaded" id="btnUpload" multiple="multiple" accept="image/*"  />    <br />

<button type="submit"  id="Upload">Upload</button>
}

控制器：

  [HttpPost]
        public ActionResult Uploading(ImageModel infouploadimage)
        {
            for (int i = 0; i < Request.Files.Count; i++)
            {
                if (Request.Files[i].ContentLength > 0)
                {
                    HttpPostedFileBase uploadedFile = Request.Files[i];
                    string fileName = Guid.NewGuid().ToString();
                    string serverPath = Server.MapPath("~");
                    string imagesPath = serverPath + "Content\\Images\\";
                    string thumsise = Path.Combine(imagesPath, "Thumb" + fileName);
                    string thumbPath = Path.Combine(imagesPath, "Thu" + fileName);
                    string fullPath = Path.Combine(imagesPath, "Full" + fileName);
                    string Bigpath = Path.Combine(imagesPath, "big" + fileName);
                    string Bigpatha = Path.Combine(imagesPath, "biga" + fileName);
                    string Bigpathb = Path.Combine(imagesPath, "bigb" + fileName);
                    string Bigpathc = Path.Combine(imagesPath, "bigc" + fileName);
                    ImageModel.ResizeAndSave(thumsise, fileName, uploadedFile.InputStream, 80, true);
                    ImageModel.ResizeAndSave(thumbPath, fileName, uploadedFile.InputStream, 100, true);
                    ImageModel.ResizeAndSave(fullPath, fileName,  uploadedFile.InputStream, 500, true);
                    ImageModel.ResizeAndSave(Bigpath, fileName, uploadedFile.InputStream, 200, true);
                    ImageModel.ResizeAndSave(Bigpatha, fileName, uploadedFile.InputStream, 250, true);
                    ImageModel.ResizeAndSave(Bigpathb, fileName, uploadedFile.InputStream, 150, true);
                    ImageModel.ResizeAndSave(Bigpathc, fileName, uploadedFile.InputStream, 50, true);

                }
            }


            return RedirectToAction("Index", "Home");
        }

型号：

 public class ImageModel
    {

        [Required]

        public string Name{ get; set; }
        public string Title{ get; set; }

        public HttpPostedFileWrapper ImageUploaded { get; set; }
        public static void ResizeAndSave(string savePath, string fileName, Stream imageBuffer, int maxSideSize, bool makeItSquare)
        {
            int newWidth;
            int newHeight;
            Image image = Image.FromStream(imageBuffer);
            int oldWidth = image.Width;
            int oldHeight = image.Height;
            Bitmap newImage;
            if (makeItSquare)
            {
                int smallerSide = oldWidth >= oldHeight ? oldHeight : oldWidth;
                double coeficient = maxSideSize / (double)smallerSide;
                newWidth = Convert.ToInt32(coeficient * oldWidth);
                newHeight = Convert.ToInt32(coeficient * oldHeight);
                Bitmap tempImage = new Bitmap(image, newWidth, newHeight);
                int cropX = (newWidth - maxSideSize) / 2;
                int cropY = (newHeight - maxSideSize) / 2;
                newImage = new Bitmap(maxSideSize, maxSideSize);
                Graphics tempGraphic = Graphics.FromImage(newImage);
                tempGraphic.SmoothingMode = SmoothingMode.AntiAlias;
                tempGraphic.InterpolationMode = InterpolationMode.HighQualityBicubic;
                tempGraphic.PixelOffsetMode = PixelOffsetMode.HighQuality;
                tempGraphic.DrawImage(tempImage, new Rectangle(0, 0, maxSideSize, maxSideSize), cropX, cropY, maxSideSize, maxSideSize, GraphicsUnit.Pixel);
            }
            else
            {
                int maxSide = oldWidth >= oldHeight ? oldWidth : oldHeight;

                if (maxSide > maxSideSize)
                {
                    double coeficient = maxSideSize / (double)maxSide;
                    newWidth = Convert.ToInt32(coeficient * oldWidth);
                    newHeight = Convert.ToInt32(coeficient * oldHeight);
                }
                else
                {
                    newWidth = oldWidth;
                    newHeight = oldHeight;
                }
                newImage = new Bitmap(image, newWidth, newHeight);
            }
            newImage.Save(savePath + fileName + ".jpg", ImageFormat.Jpeg);
            //newImage.Save(savePath + fileName + ".jpg", ImageFormat.Jpeg);
            image.Dispose();
            newImage.Dispose();
        }

        public void infouploadimage(string name, string title,string filename)
        {
            Name= name;
            Title= title;
           ImageUploaded = filename; <== ERROR HERE ALSO

            string connection = ConfigurationManager.ConnectionStrings["DefaultConnection"].ConnectionString;

            using (SqlConnection connect = new SqlConnection(connection))
            {
                string query = "Insert Into MYtable(Name, Title, Images) Values(@name, @title, ???)";

                SqlCommand command = new SqlCommand(query, connect);
                command.Parameters.AddWithValue("NomeEmpresa", n_empresa);
                command.Parameters.AddWithValue("Titulo", titulo_revista);
                //command.Parameters.AddWithValue("filename", ImageUploaded);
                connect.Open();
                command.ExecuteNonQuery();
            }
        }
}

Answer 1

首先，在控制器的 POST 方法中设置断点。在调试时让执行到达这个断点并验证模型是否按照您的预期设置了所有属性。如果没有，您可能在将表单绑定到模型时遇到问题。

此外，如果您熟悉 SQL Profiler，则可以使用它来查看是否发生了 SQL 插入以及传入的值。

我建议研究如何使用您的代码来提高您的调试能力。也许还有一些额外的日志记录。

至于关于移动方法的 cmets - 研究领域模型模式/领域驱动设计。还要查看反模式“贫血域模型”（对此有些不满），这样您就可以自己决定方法的发展方向。