c# 连接数据库oracle 无效操作。连接被关闭
private void button1_Click(object sender, EventArgs e){
  String name = this.textBox1.Text;
  String password = this.textBox2.Text;
  OracleConnection conn = new OracleConnection（"server=materielSystem;uid=fengge;pwd=fengge");
  conn.Open();
  OracleCommand comm = new OracleCommand("select * from users where username= '"+name+"' and password = '"+password+"'");
   
  OracleDataReader orReader = comm.ExecuteReader(); if (orReader.Read())
  {
  Console.WriteLine(orReader.GetString(1)+" "+orReader.GetString(2));
  }
  else
  {
  Console.WriteLine("用户名或密码有有误，请重新输入！");
  this.textBox1.Focus();
  }
  }

当运行到红色的代码时出先“无效操作。连接被关闭”


------解决方案--------------------
server=materielSystem;uid=fengge;pwd=fengge
这个有问题吧
没有指定数据库，只指定了服务器

XML code

Server=.;DataBase=JobBS;UID=sa;PWD=sa