Question

我正在尝试使用参数执行存储过程，并将结果导入DataTable;但执行后，我明白了：

我可以IDataRecord但我不能IDataReader - 为什么？我错过了什么？感谢

public DataTable ExecuteProcedureTest(string storedProcedure, Dictionary<Filter, object> filterValue)
{
    var parameters = GetParams(filterValue);

    var sqlConnection = new SqlConnection(ConfigurationManager.ConnectionStrings["testconn"].ConnectionString);

    var cmd = sqlConnection.CreateCommand(); 

    SqlDataReader reader;
    IDataReader dataReader;
    IDataRecord[] dataRecords;

    var table = new DataTable();

    cmd.CommandType = CommandType.StoredProcedure;
    cmd.CommandText = storedProcedure;

    foreach (var item in parameters)
    {
        cmd.Parameters.Add(item);
    }

    try
    {
        sqlConnection.Open();
        reader = cmd.ExecuteReader();

        dataRecords = reader.OfType<IDataRecord>().ToArray();
        table.Load(reader);
    }
    catch (Exception ex)
    {
        throw ex;
    }
    finally
    {
        sqlConnection.Dispose();
    }

    //var count = dataRecords.Count();
    return table;
}

Answer 1

如果您的目标是从DataTable填充SqlCommand，请使用SqlDataAdapter代替SqlDataReader。这是一个方便的扩展方法：

public static class SqlExtensions
{
    public static DataTable ExecuteDataTable(this SqlCommand command)
    {
        DataTable table = new DataTable();
        using (SqlDataAdapter dataAdapter = new SqlDataAdapter(command))
        {
            dataAdapter.Fill(table);
        }
        return table;
    }
}

然后从你的代码中你可以像这样使用它：

try
{
    sqlConnection.Open();
    table = cmd.ExecuteDataTable();
}
finally
{
    sqlConnection.Dispose();
}

如何从存储过程

1 个答案: