我需要在 Visual Studio 中使用代码 C# 从表值函数中获取 SQL 中的数据集

Question

1. 我有一个 SQL 表。

2. 然后我创建了一个名为 GetTaxDataSet 的表值函数。 因此，当我使用 Where 条件执行该函数时，我将获得所需的数据集值。

3. 现在，我正在尝试使用 C# 代码使用 SQL 表值函数获取数据集。

    DataSet ds = new DataSet(); SqlDataAdapter da = new SqlDataAdapter(); string sqlSelect = "Select * From [dbo].[fn_GetTaxRuleDataSet] (@TaxID, @TaxRulesID)"; SqlCommand cmd = new SqlCommand(sqlSelect, Sqlconn); SqlParameter param1 = new SqlParameter(); param1.ParameterName = "@ID"; param1.SqlDbType = SqlDbType.Int; param1.ParameterName = "@TaxID"; param1.SqlDbType = SqlDbType.Int; param1.ParameterName = "TaxRulesID"; param1.SqlDbType = SqlDbType.Int; param1.ParameterName = "@EffectiveDate"; param1.SqlDbType = SqlDbType.DateTime; cmd.Parameters.Add(param1); Sqlconn.Open(); //Executing The SqlCommand. SqlDataReader dr = cmd.ExecuteReader(); Console.ReadLine();

你们能建议我用正确的代码吗？ 谢谢

Answer 1

希望这个回答对你有帮助。 请记住，当您创建一个返回类型为 DataSet 的方法时，它也应该设置为接收 DataSet。

public DataSet GetData()
{
    DataSet output = new DataSet();
    try
    {
        SqlConnection sqlConn = new SqlConnection(connectionString);
        if (sqlConn.State == ConnectionState.Closed)
        {
            sqlConn.Open();
        }

        String sqlSelect = "Select * From [dbo].[fn_GetTaxRuleDataSet] (@TaxID, @TaxRulesID)";
        SqlCommand cmd = new SqlCommand(sqlSelect, sqlConn);
        SqlDataAdapter adapter = new SqlDataAdapter(cmd);


        adapter.Fill(output);
        sqlConn.Close();
    }

    catch (Exception ex)
    {
        ScriptManager.RegisterStartupScript(this, GetType(),
                   "ServerControlScript", ex.Message, true);

        return (null);

    }
     return output;
}

Answer 2

下面的代码有效。 这是用于表值函数。 试图从 c# 检索数据。

public void fn_GetTaxCalculationDataSet(int cur_tax_calc_ruleid) { Sqlconn.Open(); //连接打开

        //Variables to Store Result from DataSet

        int TaxCalcRuleID              = cur_tax_calc_ruleid;
        int ScheduleTypeID             = 0;
        int FilingStatusID             = 0;
        int bottomorder                = 0;
        decimal bottom                 = 0;
        decimal Amount                 = 0;
        decimal plusAmountOfPercentage = 0;

        try
        {
            //Defining The Query.
            string sqlSelect = "Select * From dbo.[fn_GetTaxCalculationDataSet] (@TaxCalcRuleID)";
            SqlCommand cmd = new SqlCommand(sqlSelect, Sqlconn);

            cmd.Parameters.Add("@TaxCalcRuleID", SqlDbType.Int).Value = cur_tax_calc_ruleid;

            //Executing The SqlCommand
            SqlDataReader dr = cmd.ExecuteReader();

            Console.WriteLine(Environment.NewLine + "Retrieving CalcData based on TaxRuleID From database..!" + Environment.NewLine);
            Console.WriteLine("Retriving The Records");
            Console.WriteLine("Press Any Key To Continue.....!");
            Console.ReadLine();

            //Check if have any records..!
            if (dr.HasRows)
            {
                while (dr.Read())
                {
                    TaxCalcRuleID  = dr.GetInt32(0);
                    ScheduleTypeID = dr.GetInt32(1);
                    FilingStatusID = dr.GetInt32(2);
                    bottomorder    = dr.GetInt32(3);
                    bottom         = dr.GetDecimal(4);
                    Amount         = dr.GetDecimal(5);
                    plusAmountOfPercentage = dr.GetDecimal(6);

                    //Displaying The Retrieved Records or DataSet..!
                    Console.WriteLine("{0},{1},{2},{3},{4},{5},{6}", TaxCalcRuleID.ToString(), ScheduleTypeID, FilingStatusID, bottomorder, bottom, Amount, plusAmountOfPercentage);
                    Console.WriteLine("Press Enter To Close");
                    Console.ReadLine();
                }
            }
            else
            {
                Console.WriteLine("No Data Found");
            }
            //Data ReaderClosed.
            dr.Close();

            //SQL Connection Closed. 
            Sqlconn.Close();
        }
        catch (Exception ex)
        {
            Console.WriteLine("Exception: " + ex.Message);
        }
    }