sql-server – 如何将图像插入sql server数据库?
如上所述,我正在尝试在表中插入图像,其中字段的类型是Varbinary.
到目前为止我做了什么: 我有一个包含许多字段的表单: @using (Html.BeginForm("InsertProduct","Home",FormMethod.Post,new { enctype = "multipart/form-data" })) { @Html.ValidationSummary(true) <fieldset> <legend>PRODUCT</legend> <div class="editor-label"> @Html.LabelFor(model => model.PRODUCT_ID) </div> <div class="editor-field"> @Html.EditorFor(model => model.PRODUCT_ID) @Html.ValidationMessageFor(model => model.PRODUCT_ID) </div> <div class="editor-label"> @Html.LabelFor(model => model.PRODUCT_NAME) </div> <div class="editor-field"> @Html.EditorFor(model => model.PRODUCT_NAME) @Html.ValidationMessageFor(model => model.PRODUCT_NAME) </div> <div class="editor-label"> @Html.LabelFor(model => model.PRODUCT_IMAGE) </div> <div class="editor-field"> <input type="file" name="PRODUCT_IMAGE" id="PRODUCT_IMAGE" style="width: 100%;" /> </div> <p> <input type="submit" value="Create" class="btn btn-primary"/> </p> </fieldset> } 所有这些字段都允许我在我的控制器中构建一个PRODUCT对象: public ActionResult InsertProduct(PRODUCT ord) { MigrationEntities1 sent = new MigrationEntities1(); sent.PRODUCT.Add(ord); sent.SaveChanges(); List<PRODUCT> Products = sent.PRODUCT.ToList(); return View("Products",Products); } 但是当我试图上传图像时(点击“创建”按钮),我有以下内容:
所以首先:它是处理图像的正确方法,其次,我认为我需要对我的图像进行预处理以插入它:如何操作? 谢谢 ! 编辑: 感谢收到的答案,似乎很适合插入.但是为了显示,我仍然有问题(仅显示“未找到的图像”piture).我尝试过两种方式: public Image LoadImage(int id) { String serviceAddress = ConfigurationManager.AppSettings["WCFADDRESS"]; DataServiceContext context = new DataServiceContext(new Uri(serviceAddress)); PRODUCT product = context.Execute<PRODUCT>(new Uri(serviceAddress + "prod_id?prod_id=" + id)).ToList().FirstOrDefault(); MemoryStream ms = new MemoryStream(product.PRODUCT_IMAGE); Image img = Image.FromStream(ms); return img; } 并且2.: @{ if (Model.product.PRODUCT_IMAGE != null) { WebImage wi = new WebImage(Model.product.PRODUCT_IMAGE); wi.Resize(700,700,true,true); wi.Write(); } } 但他们都没有工作.我究竟做错了什么 ? 解决方法1)更改数据库表以包含以下列:1: ProductImage - varbinary(MAX) 2: ImageMimeType - varchar(50) 2)像这样改变你的行动方法: public ActionResult InsertProduct(PRODUCT ord,HttpPostedFileBase PRODUCT_IMAGE) { if (ModelState.IsValid) { MigrationEntities1 sent = new MigrationEntities1(); if (image != null) { ord.ProductImage= new byte[PRODUCT_IMAGE.ContentLength]; ord.ImageMimeType = PRODUCT_IMAGE.ContentType; PRODUCT_IMAGE.InputStream.Read(ord.ProductImage,PRODUCT_IMAGE.ContentLength); } else { // Set the default image: Image img = Image.FromFile( Server.MapPath(Url.Content("~/Images/Icons/nopic.png"))); MemoryStream ms = new MemoryStream(); img.Save(ms,ImageFormat.Png); // change to other format ms.Seek(0,SeekOrigin.Begin); ord.ProductImage= new byte[ms.Length]; ord.ImageMimeType= "image/png"; ms.Read(ord.Pic,(int)ms.Length); } try { sent.PRODUCT.Add(ord); sent.SaveChanges(); ViewBag.HasError = "0"; ViewBag.DialogTitle = "Insert successful"; ViewBag.DialogText = "..."; } catch { ViewBag.HasError = "1"; ViewBag.DialogTitle = "Server Error!"; ViewBag.DialogText = "..."; } List<PRODUCT> Products = sent.PRODUCT.ToList(); return View("Products",Products); } return View(ord); } 此操作方法仅适用于创建.你需要一些编辑和索引的作品.如果您有问题,请告诉我将它们的代码添加到答案中. 更新:如何显示图像: 显示存储图像的一种方法如下: 1)将此操作方法添加到您的控制器: [AllowAnonymous] public FileContentResult GetProductPic(int id) { PRODUCT p = db.PRODUCTS.FirstOrDefault(n => n.ID == id); if (p != null) { return File(p.ProductImage,p.ImageMimeType); } else { return null; } } 2)添加< img>在视图的@foreach(…)结构中标记(或任何你想要的地方),如下所示: <img width="100" height="100" src="@Url.Action("GetProductPic","Products",routeValues: new { id = item.ID })" /> (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |