Oracle 与 asp.net v13 的连接

Question

我有这个问题很长时间了，无法解决>希望我能在这里得到解决方案。我已经安装了 Oracle express edition 11 g，并且我已经创建了表空间和模式。然后，我安装了 ASP.NET。 当我编译项目时，它显示 conn.open() 错误。

我试过这个连接

    private void clidrop()
    {
        string oradb = "DATA SOURCE=xe;USER ID=AMC; password=amc;";
        OracleConnection conn = new OracleConnection(oradb);

        conn.Open();

        string smst = "select *FROM  TECHNOVA_SMS_CLNT_MTR";
        OracleCommand cmdt = new OracleCommand(smst, conn);
        cmdt.CommandType = CommandType.Text;

        DataSet dst = new DataSet();
        OracleDataAdapter dtt = new OracleDataAdapter(cmdt);
        dtt.Fill(dst);
        clientName.DataSource = dst.Tables[0];
        clientName.DataTextField = "SMS_CLNT_NAME";
        clientName.DataValueField = "SMS_CLNT_ID";
        clientName.DataBind();

        clientName.Items.Insert(0, " --Select--");
        clientName.Items[0].Selected = true;
        clientName.Items[0].Attributes["disabled"] = "Disabled";

        conn.Close();
        conn.Dispose();

    }

错误是：

当前网络请求执行过程中发生未处理的异常

exceptions

Answer 1

尝试改变它：

string oradb = "DATA SOURCE=//localhost:1521/XE;User Id=AMC; password=amc;";

仅使用 XE 驱动程序假定已在您的 tnsnames.ora 文件中声明了名为 XE 的服务。

Answer 2

试试这个代码示例（但请注意 System.Data.OracleClient 已弃用）：

using System.Data.OracleClient;
using System.Data;     
class Example 

    {
        private string m_sConnectionString;
        private OracleConnection m_dbConnection = null;

        public OracleConnection Connection
        {
            get
            {
                if (null == m_dbConnection)
                {
                    m_dbConnection = new OracleConnection(m_sConnectionString);
                }
                return m_dbConnection;
            }
        }

        /// <summary>
        /// Open the connection
        /// </summary>
        public void Open()
        {
            if (Connection.State != ConnectionState.Open)
                Connection.Open();
        }

        /// <summary>
        /// Close the connection
        /// </summary>
        public void Close()
        {
            try
            {
                if (null == m_dbConnection)
                    return;
                m_dbConnection.Close();
            }
            catch { }
        }

        /// <summary>
        /// Execucte a SQL command, with open a new connection
        /// </summary>
        /// <param name="query">The SQL Query</param>
        public void Execute(string query)
        {
            Open();
            using (OracleCommand dbSqlCmd = Connection.CreateCommand())
            {
                dbSqlCmd.CommandText = query;
                dbSqlCmd.ExecuteNonQuery();
                dbSqlCmd.Dispose();
            }
        }

        public void Connect(string schema, string password, string datasource)
        {           
            OracleConnectionStringBuilder conn_builder = new OracleConnectionStringBuilder();
            conn_builder.DataSource = datasource.Replace("/", @"\"); //Replace the / with a \ (standard path);           
            conn_builder.Add("Password", password);
            conn_builder.Add("User ID", schema);
            conn_builder.Pooling = true;
            conn_builder.MaxPoolSize = 40;
            conn_builder.MinPoolSize = 40;          
            conn_builder.Unicode = true;
            m_sConnectionString = conn_builder.ConnectionString;            
        }
    }