C#+VS2012图片二进制流与数据库MySql、水晶报表间的操作（一）

连接数据库

1、新建winform窗口程序，工程名为ImageSqlTest;

2、添加引用MySql.Data;

3、编写函数。

在本地MySql中新建一个数据库，名为test,Mysql登录名为root,密码为123456；

函数代码如下：

MySqlConnection conn = new MySqlConnection();
string connString = "Server = localhost; DataBase = test; Uid = root; Pwd = 123456";
conn.ConnectionString = connString;
conn.Open();
Console.WriteLine(conn.State.ToString());//打印出连接状态，为open，则数据库连接成功

完整代码如下：

Form1.cs:

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

namespace ImageSqlTest
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
private void sqlConnect()
{
MySqlConnection conn = new MySqlConnection();
string connString = "Server = localhost; DataBase = test; Uid = root; Pwd = 123456";
conn.ConnectionString = connString;
conn.Open();
Console.WriteLine(conn.State.ToString());
}
}
}

运行，控制台输出：open

到此，成功访问到数据库test