asp.net如何把图片存到数据库中

首先..定义一个函数..将图片转化为二进制码

//定义将图片转化为长二进制代码的函数getphoto()

public

Byte[]

getphoto(string

photopath)

{

string

str

=

photopath

FileStream

file

=

new

FileStream(str,

FileMode.Open,

FileAccess.Read)

Byte[]

bytBLOBData

=

new

Byte[file.Length]

file.Read(bytBLOBData,

0,

bytBLOBData.Length)

file.Close()

return

bytBLOBData

}//这是定义函数..

然后..就是将转换成二进制码的图片插入数据库中..下面是简单的也是重要的sql语句..

if

(this.pictureBox1.Image

!=

null)

{

sql1

=

sql1

+

",Photo"

sql2

=

sql2

+

",bytBLOBData"

Byte[]

bytBLOBData

=

getphoto(openFileDialog1.FileName)

cmd.Parameters.Add(new

OleDbParameter("jpeg",

OleDbType.Binary,

bytBLOBData.Length,

ParameterDirection.Input,

true,

0,

0,

null,

DataRowVersion.Default,

bytBLOBData))

}

接下来..是读取...

string

sql

=

"select

photo

from

studentinfo

where

studentid

=

"

+

this.Tag.ToString()

OleDbCommand

cmd

=

new

OleDbCommand(sql,

connection1)

if

(Convert.DBNull

!=

cmd.ExecuteScalar())

pictureBox1.Image

=

Image.FromStream(new

MemoryStream((Byte[])cmd.ExecuteScalar()))//读取长二进制为图片..

我做了个例子给你\x0d\x0a前台：\x0d\x0a\x0d\x0a\x0d\x0a\x0d\x0a\x0d\x0a\x0d\x0a后台：\x0d\x0a protected void Button1_Click(object sender, EventArgs e)\x0d\x0a{\x0d\x0aFileUpload1.SaveAs(Server.MapPath("img/"+FileUpload1.FileName))//上传图片\x0d\x0aImage1.ImageUrl = "~/img/" + FileUpload1.FileName//图片路径（将这个数据保存到数据库就可以了。img为项目里一个文件夹的名称）\x0d\x0a} 回答于 2022-11-17

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