从存储过程调用前缺少选择

Question

我在同一个存储过程中有两个选择，例如

SELECT
    FORMAT(AVG([DC].[ContractedAmount]) , '$###,###,###,###.##') AS [AverageContractedAmount],
    FORMAT(MAX([DC].[ContractedAmount]) , '$###,###,###,###.##') AS [MaxContractedAmount],
    FORMAT(MIN([DC].[ContractedAmount]) , '$###,###,###,###.##') AS [MinContractedAmount],
    COUNT([DC].[ContractedAmount]) AS [TotalProjects]
FROM 
    [DesignCustomer] AS [DC]
INNER JOIN 
    [Design] AS [D] ON [DC].[DesignKey] = [D].[DesignKey]
INNER JOIN 
    [Task] AS [T] ON [D].[DesignKey] = [t].[DesignKey]
INNER JOIN 
    [ProjectDesign] AS [PD] ON [D].[DesignKey] = [PD].[DesignKey]
INNER JOIN 
    [Project] AS [P] ON [PD].[ProjectKey] = [P].[ProjectKey]
INNER JOIN 
    [Address] AS [A] ON [A].[AddressGuid] = [P].[ProjectGuid]
WHERE ...

SELECT
    CONCAT([P].[LegacyKey] , ' ' , [P].[Name]) AS [Project],
    CONCAT([D].[Name] , ' ' , [DT].[Abbreviation] , ' ' , [D].[DesignNumber]) AS [Design],
    FORMAT([DC].[ContractedAmount] , '$###,###,###,###.##') AS [Amount],
    [P].[NumberOfUnits] AS [Units]
FROM 
    [DesignCustomer] AS [DC]
INNER JOIN 
    [Design] AS [D] ON [DC].[DesignKey] = [D].[DesignKey]
INNER JOIN 
    [DesignType] AS [DT] ON [D].[DesignTypeGuid] = [DT].[DesignTypeGuid]
INNER JOIN 
    [Task] AS [T] ON [D].[DesignKey] = [t].[DesignKey]
INNER JOIN 
    [ProjectDesign] AS [PD] ON [D].[DesignKey] = [PD].[DesignKey]
INNER JOIN 
    [Project] AS [P] ON [PD].[ProjectKey] = [P].[ProjectKey]
INNER JOIN 
    [Address] AS [A] ON [A].[AddressGuid] = [P].[ProjectGuid]
WHERE ...

我将C＃插入Datatable的方式是：

public DataTable ExeSQLEstimate(string sprocName, parameters... )
{
    SqlCommand cmd = new SqlCommand(sprocName, this.dbconn);
    cmd.CommandType = CommandType.StoredProcedure;

    cmd.Parameters.Add("@MinWoodStories", SqlDbType.Int).Value = minWoodStories;
    //etc

    DataTable tbl = new DataTable("Table1")
        {
            Locale = System.Globalization.CultureInfo.InvariantCulture
        };

    SqlDataAdapter da = new SqlDataAdapter(cmd);

    try
    {
        da.Fill(tbl);
    }
    catch (SqlException e)
    {
        this.HandleSQLError(e, "GetTableBySQL", sprocName);
    }
    finally
    {
        cmd.Dispose();
    }

    return tbl;
}

但是由于某种原因，我只能得到一行（第一次选择），而不是两行（每次选择一个）

为什么只返回一行？问候

Answer 1

您的过程返回多个结果集，每个结果集将存储在单独的DataTable中。您要填充数据集而不是数据表。然后，您的数据集将具有2个数据表，其中包含过程的结果，您可以索引到DataSet.DataTables属性中以访问数据。

这是一个简单的示例，p_MultipleResultsProc返回2个结果集，如您的过程一样：

DataSet ds = new DataSet();
using (SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["conn"].ConnectionString))
using (SqlCommand cmd = new SqlCommand("EXEC p_MultipleResultsProc", conn))
using (SqlDataAdapter da = new SqlDataAdapter(cmd))
{
    da.Fill(ds);
}

执行后，ds将包含2个数据表，每个数据表包含过程调用中不同的结果集。