C#-将照片存入到SQL SERVER

将存照片的字段设为image类型。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace PhotoSQL
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        string sqlCon = "";
        private void button1_Click(object sender, EventArgs e)
        {
            string url = @"C:UsersjinweiDesktop	iger.jpg";
            byte[] dd = GetPictureData(url);

            ImgToDB(dd);//保存到数据库中  
        }

        private void button2_Click(object sender, EventArgs e)
        {
            ImgDBTo();
        }

        /// <summary>
        /// 保存到数据库
        /// </summary>
        /// <param name="imgBytesIn"></param>
        private void ImgToDB(byte[] imgBytesIn)
        {
            try
            {
                SqlConnection con = new SqlConnection("server=SDSC2-1,1433;uid=sa;pwd=jinwei;database=web");
                con.Open();
                SqlCommand cmd = new SqlCommand("insert  into aaaa (img) values( @Image ) ;", con);
                cmd.Parameters.Add("@Image", SqlDbType.Image);
                cmd.Parameters["@Image"].Value = imgBytesIn;
                cmd.ExecuteNonQuery();

                con.Close();
                MessageBox.Show("图片上传成功");

            }
            catch
            {
                MessageBox.Show("您选择的图片不能被读取或文件类型不对！", "错误", MessageBoxButtons.OK, MessageBoxIcon.Warning);

            }

        }

        /// <summary>
        /// 从数据库中  图片 并且保存到C盘
        /// </summary>
        public void ImgDBTo()
        {
            byte[] MyData = new byte[0];
            using (SqlConnection conn = new SqlConnection("server=SDSC2-1,1433;uid=sa;pwd=jinwei;database=web"))
            {
                conn.Open();
                SqlCommand cmd = new SqlCommand();
                cmd.Connection = conn;
                cmd.CommandText = "select * from aaaa";
                SqlDataReader sdr = cmd.ExecuteReader();
                sdr.Read();
                object o = sdr["img"];
                MyData = (byte[])sdr["img"];//读取第一个图片的位流
                int ArraySize = MyData.GetUpperBound(0);//获得数据库中存储的位流数组的维度上限，用作读取流的上限

                FileStream fs = new FileStream(@"c:0.jpg", FileMode.OpenOrCreate, FileAccess.Write);
                fs.Write(MyData, 0, ArraySize);
                fs.Close();   //-- 写入到c:0.jpg。
                conn.Close();
                Console.WriteLine("读取成功");//查看硬盘上的文件
            }
        }

        /// <summary>
        /// 根据路径将图片转换成 byte[]
        /// </summary>
        /// <param name="imagepath"></param>
        /// <returns></returns>
        public byte[] GetPictureData(string imagepath)
        {
            /**/
            ////根据图片文件的路径使用文件流打开，并保存为byte[] 
            FileStream fs = new FileStream(imagepath, FileMode.Open);//可以是其他重载方法 
            byte[] byData = new byte[fs.Length];
            fs.Read(byData, 0, byData.Length);
            fs.Close();
            return byData;
        }
    }
}

转载来源：

https://www.cnblogs.com/cl1006/p/10181520.html