c# - 从 SQL 返回 2 个结果

Question

如果我有一个存储过程是

Alter dbo.Testing
    Select userid from masterdb
    where employed = 'Yes'

    Select Count(*) from leftfield
    where pin is not null

如何将每个查询的返回结果存储在单独的数据集中？

伪代码:

firstdataset = Select userid from masterdb where employed = 'Yes'

seconddataset = select count(*) from leftfield where pin is not null

编辑

我使用它从存储过程将 1 个结果集返回到 C# 数据集。是否可以返回超过 1 个？

public DataSet RunStoredProc(string databaseConnection)
{
    ds = new DataSet();  

    DSqlQueryBuilder = new StringBuilder();

    SqlQueryBuilder.Append("exec dbo.StoredProc "); 

    SqlConnection = new SqlConnection(connectionString);
    SqlCommand = new SqlCommand(sqlQuery, SqlConnection);

    SqlConnection.Open();
    SqlCommand.CommandTimeout = 0;  
    ds = new DataSet();

    SqlDataAdapter = new SqlDataAdapter(SqlCommand);            
    SqlDataAdapter.Fill(ds, "Data");

    return ds;
}

编辑＃2

public DataSet RunStoredProc(string databaseConnection)
{
    ds = new DataSet();  
    DSqlQueryBuilder = new StringBuilder();
    SqlQueryBuilder.Append("exec dbo.StoredProc "); 
    //Error 1 On Line Below
    ds = ExecuteSqlQuery(databaseConnection, SqlQueryBuilder.ToString());
    return ds;
}
public List<DataTable> RunStoredProc(string databaseConnection)
{
    var dataTables = new List<DataTable>();  
    DSqlQueryBuilder = new StringBuilder();
    SqlQueryBuilder.Append("exec dbo.StoredProc "); 
    SqlConnection = new SqlConnection(connectionString);
    SqlCommand = new SqlCommand(sqlQuery, SqlConnection);
    var reader = SqlCommand.ExecuteReader();
    DataTable dt1 = new DataTable();
    dt1.Load(reader);
    dataTables.Add(dt1);
    DataTable dt2 = new DataTable();
    dt2.Load(reader);
    dataTables.Add(dt2);
    return dataTables;
}

Error # 1
Cannot implicitly convert type 'System.Collections.Generic.List' to 'System.Data.DataSet'

Answer 1

你可以这样做:

Alter dbo.Testing

-- Declare your variables
Declare @userId AS INT;
Declare @count AS INT;

-- Set the value
Select @userId = userid from masterdb where employed = 'Yes';
Select @count = Count(1) from leftfield where pin is not null;

-- Return the values
Select @userId, @count;

**编辑添加连接数据库的功能**

获取值的示例函数:

static DataSet sqlTest(string connectionString)
{
    using (var sqlConnection = new SqlConnection(connectionString))
    {
        sqlConnection.Open();
        var sqlCommand = new SqlCommand("exec dbo.StoredProc", sqlConnection);
        var dataSet = new DataSet();
        var sqlDataAdapter = new SqlDataAdapter(sqlCommand);
        sqlDataAdapter.Fill(dataSet, "Data");

        // you can access your values like that:
        var userId = dataSet.Tables["Data"].Rows[0][0];
        var count = dataSet.Tables["Data"].Rows[0][1];

        return dataSet;
    }
}