甲骨文插入查詢

Question

我得到這個錯誤「ORA-01722：非法/無效號碼」

  decimal first2var = Convert.ToDecimal(var1); 
      decimal id_refeicao; 

      //... 
      // save values in var insted of lables 
      decimal id_usuario = (decimal)dr.GetInt32(0); 
      //... 
      var idUsuarioParameter = new OracleParameter 
      { 
       ParameterName = "id_usuario", 
       OracleDbType = OracleDbType.Decimal, 
       Direction = ParameterDirection.Input, 
       Value = id_usuario 
      }; 
      var idRefeicaoParameter = new OracleParameter 
      { 
       ParameterName = "id_refeicao", 
       OracleDbType = OracleDbType.Decimal, 
       Direction = ParameterDirection.Input, 
       Value = id_refeicao 
      }; 
      var var1Parameter = new OracleParameter 
      { 
       ParameterName = "first2var", 
       OracleDbType = OracleDbType.Decimal, //-- populate with correct oracle type 
       Direction = ParameterDirection.Input, 
       Value = first2var 
      }; 
       OracleConnection connection = new OracleConnection(oradb); 
       connection.Open(); 
       cmd.Connection = connection; 
       cmd.CommandText = "INSERT INTO SER_REFEICAO_USUARIO (USUARIO, REFEICAO, DATA_HORA, ORIGEM) VALUES(:id_usuario, :id_refeicao, SYSDATE , :first2var)"; 
       cmd.Parameters.Add(idUsuarioParameter); 
       cmd.Parameters.Add(idRefeicaoParameter); 
       cmd.Parameters.Add(var1Parameter); 
       cmd.CommandType = CommandType.Text; 
       cmd.ExecuteNonQuery(); 
       connection.Close(); 

誰能幫我什麼，我做錯了，如果我硬代碼我在我的插入查詢值，它工作正常，但如果我通過上面的參數，所以我得到了錯誤。

Answer 1

根據這一source，應忽略從參數名稱:，所以它應該是這樣的：

cmd.Parameters.Add("id_usuario", id_usuario); 
cmd.Parameters.Add("id_refeicao", id_refeicao); 
cmd.Parameters.Add("var1", var1); 

此外，如在評論中提到的，你有你的查詢文本之間的不匹配：

INSERT INTO SER_REFEICAO_USUARIO (USUARIO, REFEICAO, DATA_HORA, ORIGEM) 
VALUES(:id_usuario, :id_refeicao, SYSDATE, :var2) 

而且你的參數聲明：

cmd.Parameters.Add("var1", var1); 

Answer 2

我假設你使用ODP.NET。根據我的經驗，我總是必須指定OracleDbType.Decimal，因爲Oracle不喜歡byte，int或long。另一個問題是我們沒有將OracleDbType與參數一起傳遞，因此ODP.NET看到您傳遞了一個字符串，並且可能說該參數的類型是字符串，而不是您想要的類型。再加上Sven Grosen的回答應該爲你做。你最終得到的東西如下：

decimal id_usuario = (decimal)dr.GetInt32(0); 
decimal id_refeicao = (decimal)dtre.GetInt32(0); 
var idUsuarioParameter = new OracleParameter 
{ 
    ParameterName = "id_usuario", 
    OracelDbType = OracleDbType.Decimal, 
    Direction = ParameterDirection.Input, 
    Value = id_usuario 
}; 
var idRefeicaoParameter = new OracleParameter 
{ 
    ParameterName = "id_refeicao", 
    OracelDbType = OracleDbType.Decimal, 
    Direction = ParameterDirection.Input, 
    Value = id_refeicao 
};  
var var1Parameter = new OracleParameter 
{ 
    ParameterName = "var1", 
    //OracelDbType = OracleDbType.Decimal, -- populate with correct oracle type 
    Direction = ParameterDirection.Input, 
    Value = var1 
}; 


connection.Open(); 
cmd.Connection = connection; 
cmd.CommandText = "INSERT INTO SER_REFEICAO_USUARIO (USUARIO, REFEICAO, DATA_HORA, ORIGEM) VALUES(:id_usuario, :id_refeicao, SYSDATE, :var1)"; 
cmd.Parameters.Add(idUsuarioParameter); 
cmd.Parameters.Add(idRefeicaoParameter); 
cmd.Parameters.Add(var1Parameter); 
cmd.CommandType = CommandType.Text; 
cmd.ExecuteNonQuery(); 
connection.Close(); 

我認爲應該爲你做。注意：未經測試/未編譯的代碼。