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Introduction to .NET with C#
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Introduction to .NET with C#

Introduction to .NET with C#

1. Introduction
What is the .NET Platform exactly?Creating a Console ApplicationTaking input from the UserTask - Building a Simple CalculatorDealing with Exceptions caused by User InputTask - Improving the CalculatorReading FilesWriting FilesTask - File Based Calculator
2. Asynchronous Programming and Introduction to Web Services
What is Asynchronous Programming?Implementing an Asynchronous MethodTask - Asynchronously Reading FilesIntroduction to APIsMaking a GET RequestTask - Using an APIHandling Exceptions caused by HTTP RequestTask - Exception Handling for API Response
3. Introduction to Databases with .NET
What is a Database?Structure of a Relational DatabaseSetting Up A MySQL ServerConnecting to the MySQL ServerTask - Writing Connection StringsExecuting CommandsTask - Executing MySQL CommandsMySqlCommand MethodsTask - Connecting to a MySQL Database and Executing Commands
4. CRUD Operations with MySQL
Introduction to CRUD OperationsInstalling & Using MySQL WorkbenchCREATE - Part ITask - Using CREATECREATE - Part IITask - Using INSERTReadTask - Using SELECTUpdateTask - Using UPDATEDelete - Part IDelete - Part IITask - Using DELETE
5. Optimizing Database Operations
Stored ProceduresTask - Executing Stored ProceduresDataReader vs DataSetDataAdapter & DataSetTask - Reading Tables using MySqlDataAdapterWhat's Next?

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Dealing with Exceptions caused by User Input

Recap:

  • try-catch blocks can be used for avoiding program crashes in case of invalid inputs;
  • The code that parses user input can be enclosed into a try block, and an error message can be displayed to the user via the catch block in case the parsing fails;
  • We can enclose the try-catch block into an infinite while loop, which breaks after the user input is successfully parsed and stored. This way, we can make sure that instead of crashing, the program prompts the user for input until the user gives the correct input.
1. In a try-catch structure, where should the code that might throw an exception be placed?
2. What will happen if the user enters "abc" when prompted?
In a try-catch structure, where should the code that might throw an exception be placed?

In a try-catch structure, where should the code that might throw an exception be placed?

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What will happen if the user enters "abc" when prompted?

What will happen if the user enters "abc" when prompted?

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