C#中连接数据库

Question

C#中连接数据库有几种方法?
请高手指点指点`````
   Thank You

Answer 1

http://apps.hi.baidu.com/share/detail/14973865

Answer 2

http://topic.csdn.net/u/20091210/15/41b751c2-1779-492d-9df9-e7e0007a4e6d.html

Answer 3

常用的两种，不管是什么数据库，一个是选择数据源 一个是代码实现，代码实现 sqlconnection 和 sqlcommand网上很多关于数据库连接的例子 这里就不帮你找了

Answer 4

(一)常用连接:
1.使用SqlConnection对象:
public void SqlConnectionOpen()
{
   SqlConnection conn= new SqlConnection();
   conn.ConnectionString = "user id=sa;password=;initial catalog=northwind;datasource=localhost;connect Timeout=20";
   conn.Open();
}
2.使用OleDbConnection对象:
public void OleDBConnectionOpen()
{
   OleDBConnection conn = new OleDbconnection();
   conn.ConnectionString="Provider=Microsoft.Jet.OLEDB.4.0;DataSource=C:\Customer.mdb";
   conn.Open();
}
(二)其它:
1.ODBC连接Access本地数据库
  conGoodDay.Open("Driver={Microsoft Access Driver(*.mdb)};"+"Dbq=C:\a.mdb;"+
  "Uid=Admin;"+"Pwd=;");
2.ODBC连接Access系统数据库
  conGoodDay.Open("Driver={Microsoft Access Driver(*.mdb)};"+"Dbq=C:\a.mdb;"+
  "SystemDB=Admin;"+"Pwd=;");
3.ODBC连接Access系统数据库
  conGoodDay.Open("Driver={Microsoft Access Driver(*.mdb)};"+"Dbq=\\server\share\a.mdb;");
4.ODBC连接Excel系统数据库
  conGoodDay.Open("Driver={Microsoft Access Driver(*.xls)};"+"DriverId=790;"+
  "Dbq=C:\a.xls;"+"DefaultDir=c:\somepath;");
5.ODBC连接Oracle系统数据库
  conGoodDay.Open("Driver={Microsoft ODBC for Oracle};"+"Server=OracleServer.world;"+
  "Uid=Admin;"+"Pwd=password;");
6.ODBC连接Sql Servr
  conGoodDay.Open("Driver={Sql Server};"+"Server=myServer;"+"Database=myDatabaseName;"
  "Uid=Admin;"+"Pwd=password;");
7.ODBC连接Visual FoxPro
  conGoodDay.Open("Driver={Microsoft Visual FoxPro Driver};"+
  "SourceType=DBC;"+"SourceDB=c:a.dbc;"+"Exclusive=No;");

Answer 5

简单的数据库连接就是一段代码：
string connStr = "Data Source=.; Initial Catalog=liushouakang; User Id=sa; Pwd=qing5215107";
            SqlConnection conn = new SqlConnection(connStr);
            try
            {
                string sql = "select* from Student";
                SqlCommand comm = new SqlCommand(sql, conn);
                conn.Open();
                SqlDataReader reader = comm.ExecuteReader();
                int index = 0;
                while (reader.Read())
                {
                        Emploee ee = new Emploee();
                        ee.Id1 = Convert.ToInt32(reader[0]);
                        ee.Name1 = reader[1].ToString();
                        ee.Age = Convert.ToInt32(reader[2]);
                        ee.Sex = Convert.ToString(reader[3]);
                        ee.Money = Convert.ToInt32(reader[4]);
                        ee.Email = reader[5].ToString();
                        ees[index] = ee;
                        index++;
                }
               
                 reader.Close();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
            finally
              {
                conn.Close();
              }
    
                return ees;
            }
这是个方法，，下面的自己来