1. 创建asp.net web窗体项目
代码如下：
<body> <form runat="server"> <h2>上传图片</h2> <div> <asp:FileUpload runat="server" /> <asp:Button runat="server" Text="提交" /> <asp:Label runat="server" Text="Label"></asp:Label> </div> <h2>展示图片</h2> <div> <asp:Button runat="server" Text="展示图片" /> <asp:Panel runat="server"></asp:Panel> </div> </form> </body>
效果图如下：
2. 创建数据库
数据库脚本如下：
create database Imagetest go use Imagetest CREATE TABLE [dbo].[imageTable]( [ID] [int] IDENTITY(1,1) NOT NULL, [imageData] [image] NULL, CONSTRAINT [PK_imageTable] PRIMARY KEY CLUSTERED ( [ID] ASC )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] ) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
数据库生成结果图：
3.使用EF实现图片存储
实现代码：
protected void btn_submit_Click(object sender, EventArgs e) { ImagetestEntities ie = new ImagetestEntities(); imageTable it = new imageTable(); it.imageData = ful_image.FileBytes; it= ie.imageTables.Add(it); ie.SaveChanges(); if(it.ID!=0) { lbl_message.Text = "图片上传成功"; } else { lbl_message.Text = "图片上传失败"; } }
运行结果：
4. 使用EF实现图片的展示
实现代码：
protected void btn_show_Click(object sender, EventArgs e) { ImagetestEntities ie = new ImagetestEntities(); List<imageTable> list= ie.imageTables.ToList<imageTable>(); foreach (imageTable item in list) { Image img = new Image(); img.ImageUrl ="data:image/png;base64,"+ Convert.ToBase64String(item.imageData); pn_images.Controls.Add(img); } }
运行结果：
