Question

当我尝试将数据从Dictionary移动到DB时，我甚至无法建立连接。这是函数的代码：

                const string serverName = @"homer";
                const string database = "RealState_RiskEngine";
                const string databaseTable = "dbo.LDR_ACCOUNT_DATA";

                Dictionary<string, Dictionary<string, string>> aliasesAndDatesAndValues = dictionary;
                string strCon = string.Format("Data Source={0}\\SQLSTANDARD;Initial Catalog={1};Integrated Security=SSPI",
                    serverName, database);
                SqlConnection conn = new SqlConnection(strCon);
                conn.Open();

                string SQLstr = string.Format("INSERT INTO {0} (ID_ACCOUNT, DATE_TRIMESTER, VALUE)" +
                   "VALUES ('@ID_ACCOUNT', '@DATE_TRIMESTER', '@VALUE')", databaseTable);
                SqlCommand cmd = new SqlCommand(SQLstr, conn);
                cmd.Parameters.Add("@ID_ACCOUNT", System.Data.SqlDbType.VarChar);
                cmd.Parameters.Add("@DATE_TRIMESTER", System.Data.SqlDbType.Date);
                cmd.Parameters.Add("@VALUE", System.Data.SqlDbType.Int);


                foreach (var pair in aliasesAndDatesAndValues)
                {
                    foreach (var internal_pair in pair.Value)
                    {
                        cmd.Parameters["@ID_ACCOUNT"].Value = pair.Key.ToString();
                        DateTime dateAndTime = Convert.ToDateTime(internal_pair.Key.ToString());
                        var date = dateAndTime.Date;
                        Console.WriteLine(date);
                        Console.ReadLine();

                        cmd.Parameters["@DATE_TRIMESTER"].Value = date;
                        cmd.Parameters["@VALUE"].Value = int.Parse(internal_pair.Value);
                        cmd.ExecuteNonQuery();
                    }
                }

如果我有没有参数的SqlConnection，我会得到这个堆栈跟踪：

System.InvalidOperationException: The ConnectionString property has not been initialized.
   at System.Data.SqlClient.SqlConnection.PermissionDemand()
   at System.Data.SqlClient.SqlConnectionFactory.PermissionDemand(DbConnection outerConnection)
   at System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
   at System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
   at System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry)
   at System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry)
   at System.Data.SqlClient.SqlConnection.Open()
   at ConsoleApplication2.Program.fillUpLdrAccounData(Dictionary`2 dictionary) in c:\users\atsurkanu\documents\visual studio 2015\Projects\ConsoleApplication2\ConsoleApplication2\Program.cs:line 354

如果我有参数（SqlConnection conn = new SqlConnection(strCon)）的SQLConnection，那么我得到一个堆栈跟踪：

at System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnectionPool pool, DbConnection owningObject, DbConnectionOptions options, DbConnectionPoolKey poolKey, DbConnectionOptions userOptions)
   at System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
   at System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
   at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection)
   at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection)
   at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection)
   at System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
   at System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
   at System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry)
   at System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry)
   at System.Data.SqlClient.SqlConnection.Open()
   at ConsoleApplication2.Program.fillUpLdrAccounData(Dictionary`2 dictionary) in c:\users\atsurkanu\documents\visual studio 2015\Projects\ConsoleApplication2\ConsoleApplication2\Program.cs:line 354
ClientConnectionId:00000000-0000-0000-0000-000000000000
Error Number:-1,State:0,Class:20

Answer 1

这是一个问题：

const permissions = [
  {
    permissionName: 'user_likes',
    errorMessage: 'To give you better results we need your likes'
  },
  {
    permissionName: 'user_birthday',
    errorMessage: 'Would you like to receive a gift from us on your birthday?'
  },
  {
    permissionName: 'user_friends',
    errorMessage: 'We can\'t match you without knowing your friends'
  }
];



// ....
login = ()=>{
    LoginManager.setLoginBehavior('system_account')
    LoginManager.logInWithReadPermissions(permissions.map((permission) => (permission.permissionName)))
        .then(this.onLoginFinished)
        .catch(this.onLoginError)
}

onLoginFinished = (result)=>{
    if(result.isCancelled) {
        // user canceled login manually
    } else {
        if (result.declinedPermissions && result.declinedPermissions.lenght > 0) {
          // handle declined permissions
          result.declinedPermissions.forEach((declinedPermission) => {
            // match the declinedPermission with the permission object
          }
        } else {
          // user gave all the permissions
        }
        AccessToken.getCurrentAccessToken().then((data)=>{
            this.props.onLogin(data.accessToken.toString())
        })
    }
}

就我而言，应该是这样的：

SqlConnection conn = new SqlConnection(strCon);

无法与sql server建立连接

1 个答案: