asp.net中的错误问题c#

Question

我有一个问题,如果你请帮助我,我有一个错误

必须声明标量变量"@Deitails".

我不知道这个问题是什么,因为我不知道Scalar是什么

 var sqlCon = new
 SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString);

             // GET CONFERENCE ROLE ID


             SqlCommand cmd = new SqlCommand();
             cmd.Connection = sqlCon;
             cmd.CommandText = "select Conference_Role_ID from AuthorPaper
 where Paper_ID = @PaperId";
             cmd.Parameters.AddWithValue("@PaperId",
 paperId);
             cmd.Connection.Open();
             string ConferenceRoleId = cmd.ExecuteScalar().ToString();
             cmd.Connection.Close();
             cmd.Dispose();




                 string query2 = @"insert into
 ReviewPaper(Overall_Rating,Paper_id,Conference_role_id,Deitails)

                              values(0,@paperId,@ConferenceRoleId,@Deitails);select
 SCOPE_IDENTITY() as RPID";

                 cmd = new SqlCommand(query2, sqlCon);
                 cmd.Parameters.AddWithValue("@paperId",
 paperId);
                 cmd.Parameters.AddWithValue("@ConferenceRoleId",
 ConferenceRoleId);

             string ReviewPaperId;

                 try
                 {
                     cmd.Connection.Open();
                     ReviewPaperId = cmd.ExecuteScalar().ToString();
                     cmd.Connection.Close();
                 }
                 catch (Exception ee) { throw ee; }
                 finally { cmd.Dispose(); }

谢谢

Answer 1

您有一个带有参数名称的SQL查询Details,但您忘记添加参数.