asp.net mvc 2.0 简单的上传图片到数据库和显示图片
我们讨论上传图片不对图片做任何更改.
首先图片是以字节块存入数据库的,所以我们应该在数据库中增加一列名为ImageFile,类型为varbinary.
我们在做Model层,我采用的是Linq to Sql 映射表,
我们在写工具类,这个工具类很简单只有一个条件查询和增加,保存,代码如下:
代码
1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Web;
5
6 namespace ImageUploadFilesDome.Models
7 {
8 public class ImagesRepository
9 {
10 TestImageDataDataContext db = new TestImageDataDataContext(); //这个就是Linq自动生成的模型工具类
11
12 public Test GetFind(int id)
13 {
14 return db.Test.SingleOrDefault(i => i.ImageId == id);
15 }
16 public void AddTest(Test te)
17 {
18 db.Test.InsertOnSubmit(te);
19 }
20
21 public void SaveTest()
22 {
23 db.SubmitChanges();
24 }
25 }
26 }
27
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Web;
5
6 namespace ImageUploadFilesDome.Models
7 {
8 public class ImagesRepository
9 {
10 TestImageDataDataContext db = new TestImageDataDataContext(); //这个就是Linq自动生成的模型工具类
11
12 public Test GetFind(int id)
13 {
14 return db.Test.SingleOrDefault(i => i.ImageId == id);
15 }
16 public void AddTest(Test te)
17 {
18 db.Test.InsertOnSubmit(te);
19 }
20
21 public void SaveTest()
22 {
23 db.SubmitChanges();
24 }
25 }
26 }
27
我们在编写HomeController代码如下:
代码
1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Web;
5 using System.Web.Mvc;
6 using ImageUploadFilesDome.Models;
7
8 namespace ImageUploadFilesDome.Controllers
9 {
10 [HandleError]
11 public class HomeController : Controller
12 {
13 public ActionResult Index()
14 {
15 int id = 1;//为了演示功能成功所以我这里自定义ID,在正常情况下这个值应该是根据业务传进来的.
16 ImagesRepository imgRepository = new ImagesRepository();
17 Test te = imgRepository.GetFind(id) ?? new Test();
18 return View(te);
19 }
20
21 [HttpPost]
22 public ActionResult Index(HttpPostedFileBase imgUpload, Test model)
23 {
24 ImagesRepository imgRepository = new ImagesRepository();
25 Test te = imgRepository.GetFind(model.ImageId);
26 if (ModelState.IsValid)
27 {
28 //这里我只做文件是否上传,没有对文件处理,如果你想对文件做处理,你就应该实现Image文件规则,必须由model下的ImageRepository类去实现
29 if (imgUpload != null)
30 {
31 byte[] imgBt = new byte[imgUpload.ContentLength];
32 //将接受到文件读到字节数组中
33 imgUpload.InputStream.Read(imgBt, 0, imgUpload.ContentLength);
34 te.ImageFile = imgBt;
35 if (model != null)//判断页面model是否为空,如果为空表示是第一次增加图片,相反就是修改图片
36 {
37 UpdateModel(te);
38
39 }
40 else
41 {
42 imgRepository.AddTest(te);
43
44 }
45 imgRepository.SaveTest(); //保存数据
46 return RedirectToAction("Index");
47 }
48 }
49 return RedirectToAction("Index");
50 }
51
52 public ActionResult ImageFiles(int id)
53 {
54 ImagesRepository imgRepository = new ImagesRepository();
55 Test te = imgRepository.GetFind(id) ?? new Test();
56 if (te.ImageFile != null)
57 {
58 Response.BinaryWrite(te.ImageFile.ToArray());
59 }
60 return View();
61 }
62 public ActionResult About()
63 {
64 return View();
65 }
66 }
67 }
68
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Web;
5 using System.Web.Mvc;
6 using ImageUploadFilesDome.Models;
7
8 namespace ImageUploadFilesDome.Controllers
9 {
10 [HandleError]
11 public class HomeController : Controller
12 {
13 public ActionResult Index()
14 {
15 int id = 1;//为了演示功能成功所以我这里自定义ID,在正常情况下这个值应该是根据业务传进来的.
16 ImagesRepository imgRepository = new ImagesRepository();
17 Test te = imgRepository.GetFind(id) ?? new Test();
18 return View(te);
19 }
20
21 [HttpPost]
22 public ActionResult Index(HttpPostedFileBase imgUpload, Test model)
23 {
24 ImagesRepository imgRepository = new ImagesRepository();
25 Test te = imgRepository.GetFind(model.ImageId);
26 if (ModelState.IsValid)
27 {
28 //这里我只做文件是否上传,没有对文件处理,如果你想对文件做处理,你就应该实现Image文件规则,必须由model下的ImageRepository类去实现
29 if (imgUpload != null)
30 {
31 byte[] imgBt = new byte[imgUpload.ContentLength];
32 //将接受到文件读到字节数组中
33 imgUpload.InputStream.Read(imgBt, 0, imgUpload.ContentLength);
34 te.ImageFile = imgBt;
35 if (model != null)//判断页面model是否为空,如果为空表示是第一次增加图片,相反就是修改图片
36 {
37 UpdateModel(te);
38
39 }
40 else
41 {
42 imgRepository.AddTest(te);
43
44 }
45 imgRepository.SaveTest(); //保存数据
46 return RedirectToAction("Index");
47 }
48 }
49 return RedirectToAction("Index");
50 }
51
52 public ActionResult ImageFiles(int id)
53 {
54 ImagesRepository imgRepository = new ImagesRepository();
55 Test te = imgRepository.GetFind(id) ?? new Test();
56 if (te.ImageFile != null)
57 {
58 Response.BinaryWrite(te.ImageFile.ToArray());
59 }
60 return View();
61 }
62 public ActionResult About()
63 {
64 return View();
65 }
66 }
67 }
68
编写index.aspx前台文件代码如下:
代码
<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<ImageUploadFilesDome.Models.Test>" %>
<asp:Content ID="Content1" ContentPlaceHolderID="TitleContent" runat="server">
Index
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
<h2>Index</h2>
<!--已经要注意Form表头文件的写法,在有文件的似乎没有设定enctype参数Action那边是接受不到文件信息的-->
<% using (Html.BeginForm("Index", "Home", FormMethod.Post, new { enctype = "multipart/form-data" })) {%>
<fieldset>
<legend><img id="imgfile" src='Home/ImageFiles/ <%=Model.ImageId %>' alt="照片" /></legend>
<div class="editor-label">
<%= Html.LabelFor(model => model.ImageId) %>
</div>
<div class="editor-field">
<%= Html.TextBoxFor(model => model.ImageId) %>
<%= Html.ValidationMessageFor(model => model.ImageId) %>
</div>
<div class="editor-field">
<input name="ImgUpload" type="file" />
</div>
<p>
<input type="submit" value="Save" />
</p>
</fieldset>
<% } %>
</asp:Content>
<asp:Content ID="Content1" ContentPlaceHolderID="TitleContent" runat="server">
Index
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
<h2>Index</h2>
<!--已经要注意Form表头文件的写法,在有文件的似乎没有设定enctype参数Action那边是接受不到文件信息的-->
<% using (Html.BeginForm("Index", "Home", FormMethod.Post, new { enctype = "multipart/form-data" })) {%>
<fieldset>
<legend><img id="imgfile" src='Home/ImageFiles/ <%=Model.ImageId %>' alt="照片" /></legend>
<div class="editor-label">
<%= Html.LabelFor(model => model.ImageId) %>
</div>
<div class="editor-field">
<%= Html.TextBoxFor(model => model.ImageId) %>
<%= Html.ValidationMessageFor(model => model.ImageId) %>
</div>
<div class="editor-field">
<input name="ImgUpload" type="file" />
</div>
<p>
<input type="submit" value="Save" />
</p>
</fieldset>
<% } %>
</asp:Content>
注意,img 标签的src属性路径,因为我们是在MVC中有Routesing所以我们还是以控制层作为回传显示图片.
在Home目录下创建ImageFiles.aspx,这样就可以显示图片了.
知道这里实现了上传,修改,显示图片.
Dome下载
https://files.cnblogs.com/angelxdb/ImageUploadFilesDome.rar