ChangeAvatar.cs

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

using MySql.Data.MySqlClient;
using System.IO;

namespace BBS
{
    public partial class ChangeAvatar : Form
    {
        public Byte[] mybyte = new byte[0];
        public string newPathPicture;

        public ChangeAvatar()
        {
            InitializeComponent();
        }

        private void button_cancel_Click(object sender, EventArgs e)
        {
            // 退出当前窗体
            this.Close();
        }

        private void ChangeAvatar_Load(object sender, EventArgs e)
        {
            // 窗口初始化设置
            // 显示原头像
            try
            {
                string sqlconf = "Server=127.0.0.1;User ID=root;Password=51aspx;Database=bbs_csharp;";
                MySqlConnection sqlConnection = new MySqlConnection(sqlconf);
                sqlConnection.Open();
                string sql1 = "select avatar from user where id = '" + DataShare.LoginUserId + "';";
                MySqlCommand sqlCommand1 = new MySqlCommand(sql1, sqlConnection);
                MySqlDataReader sqlDataReader1 = sqlCommand1.ExecuteReader();
                bool isExit = sqlDataReader1.HasRows;
                if (isExit)
                {
                    sqlDataReader1.Read();
                    string oldPathPicture = sqlDataReader1["avatar"].ToString();
                    FileStream fs = new FileStream(oldPathPicture, FileMode.Open, FileAccess.Read);
                    mybyte = new byte[fs.Length];
                    fs.Read(mybyte, 0, mybyte.Length);
                    pictureBox_old.Image = Image.FromStream(fs);
                    fs.Close();
                }
                else
                {
                    pictureBox_old.Image = null;
                    MessageBox.Show("无照片");
                }
                sqlDataReader1.Close();
                sqlConnection.Close();