There is already an open DataReader associated with this Command which must be closed first
There is already an open DataReader associated with this Command which must be closed first
There is already an open DataReader associated with this Command which must be closed first
Re: There is already an open DataReader associated with this Command which must be closed first
This can happen if you execute a query while iterating over the results from another query. It is not clear from your example where this happens because the example is not complete.
One thing that can cause this is lazy loading triggered when iterating over the results of some query.
This can be easily solved by allowing MARS in your connection string. Add `MultipleActiveResultSets=true` to the provider part of your connection string (where Data Source, Initial Catalog, etc. are specified).
One thing that can cause this is lazy loading triggered when iterating over the results of some query.
This can be easily solved by allowing MARS in your connection string. Add `MultipleActiveResultSets=true` to the provider part of your connection string (where Data Source, Initial Catalog, etc. are specified).