存储过程不会执行。 DataSet什么都不返回

Question

我在db中有这个存储过程：

ALTER procedure [dbo].[AddUpdateCams]
@CamImage_UID uniqueidentifier = NULL,
@CamImage_Url1 nvarchar(50) = NULL,
@CamImage_Url2 nvarchar(50) = NULL,
@CamImage_StatusID int = 10,
@CamImage_ItemNr nvarchar(50) = NULL,
@CamImage_OrderNr nvarchar(50) = NULL

as 
 begin
 set nocount on;
 if @CamImage_UID is null
  begin
  set @CamImage_UID = NEWID()

insert into dbo.CamImage (CamImage_UID,CamImage_Url1, CamImage_Url2, 
CamImage_StatusID, CamImage_CreateDate, CamImage_ItemNr, CamImage_OrderNr)
values (@CamImage_UID, @CamImage_Url1, @CamImage_Url2, @CamImage_StatusID, 
GETDATE(), @CamImage_ItemNr, @CamImage_OrderNr)
 end

else 
 begin
  update CamImage 
  set CamImage_StatusID = @CamImage_StatusID
  where CamImage_UID = @CamImage_UID
  end

select * from CamImage where CamImage_UID = @CamImage_UID
end

我试图通过使用SqlDataAdapter和DataSet来执行此存储过程，但是在执行时，我的DataSet不返回任何内容并且问题似乎不在Store Procedure中，因为如果我通过sql studio执行，它不会遇到任何问题。

 public DataSet runSPDataSet(string _storedProcedure)
    {
        DataSet _dataSet = new DataSet();
        if (validateSP(_storedProcedure))
        {
            SqlConnection _sqlConnection = new SqlConnection(_connectionString);
            SqlCommand _sqlCommand = new SqlCommand(_storedProcedure, _sqlConnection);
            _sqlCommand.CommandType = CommandType.StoredProcedure;
            if(_sqlParameters.Count != 0)
            {
                foreach (var item in _sqlParameters)
                {
                    _sqlCommand.Parameters.Add(item.ParameterName, item.SqlDbType).Value = item.Value;
                }
            }
            SqlDataAdapter _dataAdapter = new SqlDataAdapter(_sqlCommand);
            try
            {
                _sqlConnection.Open();
                _sqlCommand.ExecuteNonQuery();
                _dataAdapter.Fill(_dataSet);
                return _dataSet;
            }
            catch (Exception ex)
            {

                throw ex;
            }
            finally
            {
                _sqlConnection.Dispose();
            }              
        }
        return null;
    }