c# 从零到精通 读取连接数据库

c# 从零到精通 读取连接数据库
using System;
using System.Data;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
namespace Test01
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
if (textBox1.Text == “”)
{
MessageBox.Show(“请输入要连接的数据库名称”);
}
else
{
try
{
string ConStr = “server=MRC-8CF94303A82\MRNET;database=” + textBox1.Text.Trim() + “;uid=sa;pwd=111”;
SqlConnection conn = new SqlConnection(ConStr);
conn.Open();
if (conn.State == ConnectionState.Open)
{
label2.Text = “数据库【” + textBox1.Text.Trim() + “】已经连接并打开”;
}
}
catch
{
MessageBox.Show(“连接数据库失败”);
}
}
}
}
}