非常基础 sqlserver out variable[[[ - .NET技术 / C#

SQL code:
CREATE PROCEDURE [dbo].[Pr_Plan_TaskSend_GetTaskTypeCodefromTaskSendID]
(@TaskSendID int, @TaskTypeCode VARCHAR(4) output)


C# code:
using (SqlDataReader dataReader = SqlHelper.ExecuteReader(ConnectionString.OmsRead, CommandType.StoredProcedure, commandName, parms))
{
while (dataReader.Read())
{
return (string)(dataReader[0]);//??????????????????????
}
}


问号的这行对不对？还是
dataReader["TaskTypeCode"]?

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C# code:

return IsDBNull(0) ? "" : (string)(dataReader(0));

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C# code:

return IsDBNull(0) ? "" : dataReader(0).ToString();


刚才弄错了

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引用

C# code
return dataReader.IsDBNull(0) ? "" : dataReader.Get第一个数据的类型(0).ToString();

学习。。。