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asp.net实现存储和读取数据库图片

2019-11-08 18:07 1481 查看

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:

以上就是本文的全部内容,希望对大家的学习有所帮助

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标签:  asp.net 存储 读取