The reason for the issue in design preview is you are using an ObjectDataSource
component. Without using the constructor where you supply the connection string, this connection string has to be added to the start application configuration file (devenv.exe.config
for VS). Instead of an ObjectDataSource
you can use the OpenAccessDataSource component
to connect to your model.
would work on preview in a custom application.
About the allowed attachments in public forums, we aim to avoid sharing projects in public due to various license terms. It may happen by mistake to share DEV assemblies. Thus the preferred approach to send us your examples is through the support ticketing system.
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