public DbConnection CreateConnection()
{
DbProviderFactory factory = null;
string lowerProviderName = this._dbProvider.ProviderName.ToLower();
if (lowerProviderName.Contains("oracle"))
{
factory = new OracleClientFactory();
}
else if (lowerProviderName.Contains("mysql"))
{
factory = new MySqlClientFactory();
}
else
{
factory = DataUtils.GetDbProviderFactory(this._dbProvider.ProviderName);
}
DbConnection connection = factory.CreateConnection();
if (connection != null)
{
connection.ConnectionString = this._connectionString;
return(connection);
}
else
{
return(null);
}
}
public void ClientFactory()
{
DbProviderFactory f = new MySqlClientFactory();
DbConnection c = f.CreateConnection();
DbConnectionStringBuilder cb = f.CreateConnectionStringBuilder();
cb.ConnectionString = GetConnectionString(true);
c.ConnectionString = cb.ConnectionString;
c.Open();
DbCommand cmd = f.CreateCommand();
cmd.Connection = c;
cmd.CommandText = "SHOW TABLES FROM test";
cmd.CommandType = CommandType.Text;
DbDataReader reader = null;
try
{
reader = cmd.ExecuteReader();
reader.Read();
}
catch (Exception ex)
{
Assert.Fail(ex.Message);
}
finally
{
if (reader != null)
{
reader.Close();
}
}
}
public void ClientFactory()
{
DbProviderFactory f = new MySqlClientFactory();
using (DbConnection c = f.CreateConnection())
{
DbConnectionStringBuilder cb = f.CreateConnectionStringBuilder();
cb.ConnectionString = st.GetConnectionString(true);
c.ConnectionString = cb.ConnectionString;
c.Open();
DbCommand cmd = f.CreateCommand();
cmd.Connection = c;
cmd.CommandText = "SELECT 1";
cmd.CommandType = CommandType.Text;
using (DbDataReader reader = cmd.ExecuteReader())
{
reader.Read();
}
}
}
public void DbProviderFactories()
{
#if NETCOREAPP2_1
MySqlClientFactory.Register();
#endif
#if BASELINE
var providerInvariantName = "MySql.Data.MySqlClient";
#else
var providerInvariantName = MySqlClientFactory.InvariantName;
#endif
var factory = System.Data.Common.DbProviderFactories.GetFactory(providerInvariantName);
Assert.NotNull(factory);
Assert.Same(MySqlClientFactory.Instance, factory);
using (var connection = new MySqlConnection())
{
factory = System.Data.Common.DbProviderFactories.GetFactory(connection);
Assert.NotNull(factory);
Assert.Same(MySqlClientFactory.Instance, factory);
}
}
/// <summary>
/// 通过配置文件中的ProviderName来自动生成Connection对象
/// </summary>
/// <param name="databaseName">在appsetting中配置的数据库连接对象名称</param>
/// <returns></returns>
public IDbConnection CreateConnection(string databaseName)
{
bool encrypt = TwinkleContext.Config.GetValue <bool>($"ConnectionStrings:{databaseName}:Encrypt");
string connectString = TwinkleContext.Config.GetValue <string>($"ConnectionStrings:{databaseName}:ConnectString");
//如果连接字符串被加密了 需要解密
if (encrypt)
{
connectString = DataCipher.RSADecrypt(connectString);
}
string providerName = TwinkleContext.Config.GetValue <string>($"ConnectionStrings:{databaseName}:ProviderName");
IDbConnection connection = null;
switch (providerName)
{
case "System.Data.SqlClient":
connection = SqlClientFactory.Instance.CreateConnection();
break;
case "Oracle.ManagedDataAccess.Client":
connection = new OracleClientFactory().CreateConnection();
break;
case "MySql.Data.MySqlClient":
connection = new MySqlClientFactory().CreateConnection();
break;
default:
throw new DataException("There is no suitable Provider for creating IDbConnection");
}
connection.ConnectionString = connectString;
this.Connection = connection;
return(connection);
}
public static DbProviderFactory GetFactory(string providerName)
{
if (providerName == null)
{
throw new ArgumentNullException("providerName");
}
DbProviderFactory dbFactory;
switch (providerName)
{
case DbProviderNames.MySQL:
case "MYSQL":
case "MySQL":
case "mysql":
dbFactory = new MySqlClientFactory();
break;
case DbProviderNames.Oracle_Managed_ODP:
case "ORACLE":
case "Oracle":
case "oracle":
dbFactory = new Oracle.ManagedDataAccess.Client.OracleClientFactory();
break;
case DbProviderNames.SqlServer:
case "SQLSERVER":
case "SqlServer":
case "sqlserver":
dbFactory = SqlClientFactory.Instance;
break;
default:
dbFactory = null;
break;
}
return(dbFactory);
}
public static void Close()
{
Context.getConnection().Dispose();
factory = null;
Context = null;
}
/// <summary>
/// 初始化数据库连接
/// </summary>
public static void Open(string ip, string user, string pwd, string dbName)
{
factory = new MySqlClientFactory();
Context = new DbContext(dbName, "server=" + ip + ";port=3306;user="******";password="******";database=" + dbName + ";Charset=utf8", factory);
//Context.IsSupportInsertAfterSelectIdentity = false;
}
