C# 为什么我在这里得到“没有数据时无效的读取尝试”？
我的存储过程是简单的一行程序C# 为什么我在这里得到“没有数据时无效的读取尝试”？,c#,sql-server,tsql,C#,Sql Server,Tsql,我的存储过程是简单的一行程序 CREATE PROCEDURE CheckIfFinished @pid UNIQUEIDENTIFIER AS BEGIN SELECT finished FROM Partners WHERE id = @pid END 我用我的C代码调用它，就像 using (SqlCommand cmd = new SqlCommand("CheckIfFinished", this._Conn)) {
CREATE PROCEDURE CheckIfFinished
@pid UNIQUEIDENTIFIER
AS
BEGIN
SELECT finished
FROM Partners
WHERE id = @pid
END
using (SqlCommand cmd = new SqlCommand("CheckIfFinished", this._Conn))
{
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@pid", pid);
this._Conn.Open();
using (SqlDataReader dataReader = cmd.ExecuteReader())
{
finished = dataReader.GetByte(0) == 1 ? true : false;
}
this._Conn.Close();
}