/*************************************************
 * 描述：
 * 
 * Author：YS
 * Date：2020/5/15 19:14:42
 * Update：
 * ************************************************/
using CoreX.Ctrls.BaseForm;
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 WindowsFormsApplication1
{
    public partial class ImageOperation : DetailForm
    {
        #region Private Fields

        #endregion

        #region Properties

        #endregion

        #region Events

        #endregion

        #region Constructors

        public ImageOperation()
        {
            InitializeComponent();
        }
        #endregion

        #region Methods
        /// <summary>
        /// 选择本地图片
        /// </summary>
        private void OpenLocal()
        {
            OpenFileDialog OpenFileDialog1 = new OpenFileDialog();
            OpenFileDialog1.Filter = "jpg文件（*.jpg）|*.jpg|bmp文件（*.bmp）|*.bmp|ico文件（*.ico)|*.ico|png文件（*.png)|*.png|gif文件（*.gif)|*.gif";
            if (OpenFileDialog1.ShowDialog() == DialogResult.OK)
            {
                Bitmap image = new Bitmap(OpenFileDialog1.FileName);
                pictureBox1.Image = image;
            }
        }

        /// <summary>
        /// 图片保存本地
        /// </summary>
        private  void SaveLocal()
        {
            if (pictureBox1.Image == null)
            {
                MessageBox.Show("没有加载图片", "错误！", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
            }
            else
            {
                string str;
                Bitmap box1 = new Bitmap(pictureBox1.Image);
                SaveFileDialog SaveFileDialog1 = new SaveFileDialog();
                SaveFileDialog1.Filter = "jpg文件（*.jpg）|*.jpg|bmp文件（*.bmp）|*.bmp|ico文件（*.ico)|*.ico|png文件（*.png)|*.png|gif文件（*.gif)|*.gif";
                SaveFileDialog1.ShowDialog();
                str = SaveFileDialog1.FileName;
                if(str!=null && str.Trim().Length>0)
                {
                    box1.Save(str);
                }
            }
        }


        /// <summary>
        /// 图片保存到数据库（SQLserver or Oracle）
        /// </summary>
        private void SaveDataBase()
        {

            if (pictureBox1.Image == null)
            {
                MessageBox.Show("没有加载图片", "错误！", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
            }
            byte[] data = PhotoImageInsert(pictureBox1.Image);
            //StringBuilder sql =new StringBuilder($"insert into Tb_Data(Img) Values({data})");
            string sql = "insert into Tb_Data(Img) Values(@image)";
            SqlParameter[] pms = new SqlParameter[]
            {
                new SqlParameter("@image",SqlDbType.Image){Value= data},
            };
            SqlHelper.ExecuteNonQuery(sql.ToString(), CommandType.Text, pms);
            MessageBox.Show("保存成功！");
        }

        /// <summary>
        /// 图片转二进制
        /// </summary>
        /// <param name="imgPhoto">图片对象</param>
        /// <returns>二进制</returns>
        public static byte[] PhotoImageInsert(System.Drawing.Image imgPhoto)
        {
            //将Image转换成流数据，并保存为byte[]
            MemoryStream mstream = new MemoryStream();
            imgPhoto.Save(mstream, System.Drawing.Imaging.ImageFormat.Jpeg);
            byte[] byData = new Byte[mstream.Length];
            mstream.Position = 0;
            mstream.Read(byData, 0, byData.Length);
            mstream.Close();
            return byData;
        }

        /// <summary>
        /// 读取数据库图片
        /// </summary>
        private void GetData()
        {
            string sql = "select img from Tb_Data where id=(select MAX(id) from Tb_Data )";
            using (SqlDataReader datas = SqlHelper.ExecuteReader(sql.ToString(), CommandType.Text))
            {
                if (datas.HasRows)
                {
                    while (datas.Read())
                    {
                        byte[] dtResult = null;
                        Stream sr = datas.GetStream(0);
                        dtResult = new byte[sr.Length];
                        sr.Read(dtResult, 0, dtResult.Length);
                        sr.Dispose();
                        Image re = BytesToImage(dtResult);
                        pictureBox1.Image = re;
                    }
                }
            }

        }

        /// <summary>
        /// 转换图片
        /// </summary>
        /// <param name="bytes"></param>
        /// <returns></returns>
        public static Image BytesToImage(byte[] bytes)
        {
            MemoryStream ms = new MemoryStream(bytes);
            Image img = Image.FromStream(ms);
            return img;
        }

        #endregion

        #region Control Events

        /// <summary>
        /// 读取本地图片
        /// </summary>
        private void btnOpn_Click(object sender, EventArgs e)
        {
            OpenLocal();
        }

        /// <summary>
        /// 图片保存到本地
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnSaveLocal_Click(object sender, EventArgs e)
        {
            SaveLocal();
        }

        /// <summary>
        /// 保存到数据库
        /// </summary>
        private void btnSaveDataBase_Click(object sender, EventArgs e)
        {
            SaveDataBase();
        }

        /// <summary>
        /// 读取数据库图片
        /// </summary>
        private void btnOpenDataBaseData_Click(object sender, EventArgs e)
        {
            GetData();
        }

        #endregion


    }
}