asp.net实现存储和读取数据库图片

本文实例为大家分享了asp.net存储和读取数据库图片的具体代码,供大家参考,具体内容如下

1. 创建asp.net web窗体项目

代码如下:

<body>

<form id="form1" runat="server">

<h2>上传图片</h2>

<div>

<asp:FileUpload ID="ful_image" runat="server" />

<asp:Button ID="btn_submit" runat="server" Text="提交" />

<asp:Label ID="lbl_message" runat="server" Text="Label"></asp:Label>

</div>

<h2>展示图片</h2>

<div>

<asp:Button ID="btn_show" runat="server" Text="展示图片" />

<asp:Panel ID="pn_images" 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:

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