How to Troubleshoot a Table Adapter
Table adapters provide .NET webmasters with a data control in which records are contained after querying a database. If communication between the database server and the program fail, you receive errors on your page for the table adapter. You must debug and troubleshoot the adapter to fix any issues on your website so that users don't experience errors. Use the Visual Studio debugger to find the errors with the adapter and fix the syntax errors.
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Instructions
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Open Visual Studio on your desktop. Open the Web app that contains the table adapter control. Open the page where the adapter code is located. If you're unsure, press the "Ctrl" and "F" keys and type "tableadapter" in the dialog box. Visual Studio scrolls to the location of the table adapter's reference.
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Click the line number in the code editor. A red dot appears at the beginning of the line of code in the VS editor. This red mark is a break point, which means the VS compiler stops code execution on that line of code. The feature lets you walk through the code until you find the error.
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Press the "F5" key to execute the Web app. The code runs until it meets the break point. A yellow line highlights the line of code. Press the "F10" key to "step through" the code until you receive a debugger error.
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View the error shown in the debugger. If a syntax error appears, the debugger tells you the error is syntactical, so you must change the code. If the table adapter has a communication issue on the server, you must verify that the username and password used in the variable initialization is typed correctly. If no records are returned and you don't code for the issue, the "Object is Null" error displays.
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