Question

我正在创建一个Web API，并尝试在web.config文件中创建连接字符串

  <connectionStrings>
  <add name="ProConnection" connectionString="Data Source=J;User ID=T;Password=C;pooling=true;min pool size=5;Max Pool Size=60" providerName="Oracle.DataAccess.Client"/>
  <connectionStrings>

所以我可以使用aspnet_regiis.exe加密连接字符串。所以在控制器中我使用下面的代码，其中dbconn保存连接细节

public HttpResponseMessage Getdetails([FromUri] string[] id)
    { 
     string dbconn = ConfigurationManager.ConnectionStrings["ProConnection"].ConnectionString;
        {
            var inconditions = id.Distinct().ToArray();
            var srtcon = string.Join(",", inconditions);
            DataSet userDataset = new DataSet();
            var strQuery = @"SELECT * from STCD_PRIO_CATEGORY_DESCR where STCD_PRIO_CATEGORY_DESCR.STD_REF IN (" + srtcon + ")";
            OracleCommand selectCommand = new OracleCommand(strQuery, dbconn);
            OracleDataAdapter adapter = new OracleDataAdapter(selectCommand);
            DataTable selectResults = new DataTable();
            adapter.Fill(selectResults);
            string result = JsonConvert.SerializeObject(selectResults);
            string contentDisposition = "inline; filename=abc.json";
            HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.OK, result,     MediaTypeHeaderValue.Parse("application/json"));
            response.Content.Headers.ContentDisposition =  ContentDispositionHeaderValue.Parse(contentDisposition); 
            return response;
       }
   }

但我收到了错误

Answer 1

您试图直接在OracleCommand中使用您的连接字符串，而不是使用它创建OracleConnection并将其传递给您的OracleCommand：

public HttpResponseMessage Getdetails([FromUri] string[] id)
{ 
    var connectionStringSection = ConfigurationManager.ConnectionStrings["ProConnection"];
    string connectionString = connectionStringSection.ConnectionString;
    using (OracleConnection dbConn = new OracleConnection(connectionString))
    {
        var inconditions = id.Distinct().ToArray();
        var srtcon = string.Join(",", inconditions);
        DataSet userDataset = new DataSet();
        var strQuery = @"SELECT * from STCD_PRIO_CATEGORY_DESCR where STCD_PRIO_CATEGORY_DESCR.STD_REF IN (" + srtcon + ")";
        using (OracleCommand selectCommand = new OracleCommand(strQuery, dbConn))
        {
            using (OracleDataAdapter adapter = new OracleDataAdapter(selectCommand))
            {
                DataTable selectResults = new DataTable();
                adapter.Fill(selectResults);
                string result = JsonConvert.SerializeObject(selectResults);
                string contentDisposition = "inline; filename=abc.json";
                HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.OK, result,         MediaTypeHeaderValue.Parse("application/json"));
                response.Content.Headers.ContentDisposition =  ContentDispositionHeaderValue.Parse(contentDisposition); 
                return response;
            }
        }
    }
}

值得注意的是，您应该在using周围使用OracleConnection/Command/DataAdapters语句，否则可能会造成内存泄漏。

Answer 2

尝试将其设为字符串：

var strQuery = @"SELECT * from STCD_PRIO_CATEGORY_DESCR where STCD_PRIO_CATEGORY_DESCR.STD_REF IN (" + srtcon + ")";
            OracleCommand selectCommand = new OracleCommand(strQuery, dbconn);

为：

String strQuery = @"SELECT * from STCD_PRIO_CATEGORY_DESCR where STCD_PRIO_CATEGORY_DESCR.STD_REF IN (" + srtcon + ")";
            OracleCommand selectCommand = new OracleCommand(strQuery, dbconn);

也试试这个：

dbconn.Open();
 OracleCommand selectCommand = new OracleCommand ();
 selectCommand = dbconn.CreateCommand();
 selectCommand = new OracleCommand (strQuery, dbconn);

web.config文件中的连接字符串

2 个答案: