Question

我必须创建一个包含客户详细信息的ASP.NET MVC 4页面。我必须创建一个表单，我必须执行客户创建，更新和删除。不同的领域是...... 1）客户ID 2）客户名称 3）客户形象 4）客户地址现在，我对Customer Image感到困惑。如何在数据库中存储Image以及如何在数据库中的Gridview中显示它。请解决我的问题，因为它对我来说非常重要..

Answer 1

正如@LajosArpad所说，将图像保存为文件，只保存图像在数据库中的路径。

以下是创建客户的视图

<div class="box box-primary">
    @using (Html.BeginForm("Create", "Customer", FormMethod.Post, new { enctype = "multipart/form-data" }))
        {
            @Html.AntiForgeryToken()
            <div class="form-horizontal box-body">
                <div class="form-group">
                    @Html.LabelFor(model => model.Name, htmlAttributes: new { @class = "control-label col-md-2" })
                    <div class="col-md-10">
                        @Html.EditorFor(model => model.Name, new { htmlAttributes = new { @class = "form-control" } })
                        @Html.ValidationMessageFor(model => model.Name, "", new { @class = "text-danger" })
                    </div>
            </div>

           <div class="form-group">
                    @Html.LabelFor(model => model.Address, htmlAttributes: new { @class = "control-label col-md-2" })
                    <div class="col-md-10">
                        @Html.EditorFor(model => model.Address, new { htmlAttributes = new { @class = "form-control" } })
                        @Html.ValidationMessageFor(model => model.Address, "", new { @class = "text-danger" })
                    </div>
            </div>

            <div class="form-group">
                <label class="control-label col-md-2">Image</label>
                <div class="col-md-10">
                    <input class="form-control" name="image" type="file" />
                </div>
            </div>
        </div>

        <div class="box-footer">
            <input type="submit" value="Create" class="btn btn-primary" />
        </div>
    }
</div>

和控制器

    [HttpPost]
    [ValidateAntiForgeryToken]
    public ActionResult Create([Bind(Exclude = "Id")] Customer customer, HttpPostedFileBase image)
    {
        if (ModelState.IsValid)
        {
            if (image != null && image.ContentLength > 0)
            {
                var filePath = GetFilePath(image.FileName);
                image.SaveAs(filePath);
                customer.ImageUrl = "~/images/upload/" + Path.GetFileName(filePath);
            }
            // Save customer to database
            return RedirectToAction("Index");
        }

        return View(news);
    }

    // Get absolute path for saving image and check it does not exist
    public static string GetFilePath(string fileName)
    {
        var targetFolder = System.Web.Hosting.HostingEnvironment.MapPath("~/images/upload/");
        var targetPath = Path.Combine(targetFolder, fileName);
        if (File.Exists(targetPath))
        {
            var name = Path.GetFileNameWithoutExtension(fileName);
            name = name + "-" + (new Random()).Next();
            var extension = Path.GetExtension(fileName);
            name = name + extension;
            GetFilePath(name);
        }

        return targetPath;
    }

Answer 2

将图像存储为文件，并将图像的路径存储在数据库中。如果我是你，我会生成文件名，而不是使用原始文件名，以确保它们不重复。因此，您无需将图像存储在数据库中，您可以将它们存储为单独的文件。

ASP.NET MVC 4中的CRUD操作

2 个答案: