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The menu on the left now includes items for the Working with Binary Data tutorials. The main query is what is used by the auto-generated Insert and Update methods.

In the next tutorial we'll turn our attention to integrating the uploaded file with data model. The TableAdapters are responsible for communicating with the database and populating the business objects with the query results.

Working with very large amounts of binary data files that are several megabytes or larger introduces new challenges that are beyond the scope of these tutorials. Por lo tanto, agrega este Control de usuario a Default. There are several subtleties that must be addressed when saving uploading files to the web server s file system. After uploading the image file, we d update the Chai record in the Products table so that its ImagePath column referenced the path of the new image. The main disadvantage of storing binary data on the file system is that it decouples the data from the database.

Por lo tanto agrega

Another challenge of saving files to the file system revolves around naming the files. This brings up the Table Adapter Configuration Wizard, which we ve seen in a number of past tutorials. On the server-side, information about the uploaded file is accessible through the FileUpload control s properties. If a record is deleted from the Products table, the associated file on the web server s file system is not automatically deleted.

Working with very large amounts of

Recall that the SectionLevelTutorialListing. With the code we have now, User A s file will be overwritten with User B s upload. Instead, let s update the main TableAdapter query to bring back BrochurePath and create an additional data retrieval method that returns a particular category s Picture column. With this approach, when User B attempts to upload a file named Brochure.