尝试在表中插入或更新多行时发生异常

我正在尝试将Datatable中的多行插入并更新到数据库表中。以下是将Datatable传递到存储过程的代码：

 DataTable dtUserRights = new DataTable();
        PropertyInfo[] piT = typeof(clsRightsAL).GetProperties(); //Gets all column values with there datatype
        foreach (PropertyInfo pi in piT)
        {
              //create a datacolumn for each property
              DataColumn dc = new DataColumn(pi.Name, pi.PropertyType);
              dtUserRights.Columns.Add(dc);
        }
        try
        {
            if (con.State == ConnectionState.Closed)
            {
                con.Open();
            }
            for (int item = 0; item < objUserRightsALLst.Count; item++)
            {
                DataRow dr = dtUserRights.NewRow();

                for (int property = 0; property < dtUserRights.Columns.Count; property++)
                {
                    dr[property] = piT[property].GetValue(objUserRightsALLst[item], null);
                }
                dtUserRights.Rows.Add(dr);
            }
            objCmd = new SqlCommand();
            objCmd.CommandText = "sp_AD_InsertUpdateGroupRights";
            objCmd.CommandType = CommandType.StoredProcedure;
            objCmd.Connection = con;
            objCmd.Parameters.Clear();
            SqlParameter tableParameter =  objCmd.Parameters.AddWithValue("@GroupRightslist", dtUserRights);
            tableParameter.SqlDbType = SqlDbType.Structured;
 intCount = objCmd.ExecuteNonQuery();
            if (con.State == ConnectionState.Open)
            {
                con.Close();
            }
        }
        catch (Exception e)
        {
            throw e;
        }

下面是我呼叫的SP：

CREATE PROCEDURE [dbo].[sp_AD_InsertUpdateGroupRights]  
@GroupRightslist as  [dbo].[GroupRightsList] ReadOnly  
AS  
BEGIN   
if Not Exists(Select intID from tblADGroupRights where intID = (Select l.intID from @GroupRightslist l))  
Begin  
  insert into tblADGroupRights(IntGroupID,intMenuID,blAdd,blEdit,blView,blGrant,blStatus,strUserCreated
) Select l.IntGroupID,l.intMenuID,l.blAdd,l.blEdit,l.blView,l.blGrant,l.blStatus,
l.strBy from GroupRightslist l   
End     
 else    
  begin  
update A set blAdd = l.blAdd,blEdit = l.blEdit,blView = l.blView,blGrant = l.blGrant   
 FROM  tblADGroupRights A INNER JOIN @GroupRightslist l on A.intID = l.intID  
where A.intID = l.intID     
end
END

当我将单行传递给存储过程时，数据会被插入，但当数据表有多条记录时，我会得到异常：

子查询返回了多个值。当子查询跟在=、！=、<lt；=，>，>=或者当子查询用作表达式时。

我的更新Query根本不起作用。

我的用户定义表类型：

CREATE TYPE [dbo].[GroupRightsList] AS TABLE(
[intID] [int] NULL,
[intProfileID] [int] NULL,
[IntGroupID] [int] NULL,
[intMenuID] [int] NULL,
[blAdd] [bit] NULL,
[blEdit] [bit] NULL,
[blView] [bit] NULL,
[blGrant] [bit] NULL,
[blStatus] [bit] NULL,
[strBy] [nvarchar](max) NULL
) 

我知道，当Select查询返回的值超过1，而我们没有正确处理它时，通常会出现这种异常，但在我使用用户类型表的情况下，我看到许多网站都以与我相同的方式显示了它。