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C# Database Basics: Moving from Visual Basic and VBA to C# by Michael Schmalz

By Michael Schmalz

Working with information and databases in C# definitely should be daunting if you’re coming from VB6, VBA, or entry. With this hands-on consultant, you’ll shorten the training curve significantly as you grasp having access to, including, updating, and deleting information with C#—basic talents you would like in case you intend to software with this language.

No past wisdom of C# is critical. by way of following the examples during this publication, you’ll find out how to take on a number of database initiatives in C#, corresponding to operating with SQL Server, development information access types, and utilizing information in an online provider. The book’s code samples may help you start by yourself projects.

  • Create a home windows types software with a datagrid
  • Connect to a number of info resources, together with entry and SQL Server
  • Add, edit, and replace info in a database you opt and design
  • Enable clients to settle on their information resource at runtime
  • Learn the jobs of DataTable, DataView, BindingSource, Filters, and different objects
  • Understand the place variables are declared and the way they influence the code
  • Build an easy internet provider that connects to a database

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Extra info for C# Database Basics: Moving from Visual Basic and VBA to C#

Example text

There are a lot of nice things that you can do with the Entity Data Model, particularly on large projects where you have a set of developers writing application code and another set working on the database storage schema. With the Entity Data Model, you can write code to access data without having to worry about how it is stored. That said, this example is going to use the Dataset because the Entity Data Model is outside the scope of this introduction. So, select Dataset and click Next. info Figure 4-1.

As an example, you bound the date fields to a date/time picker control. You can bind to a CheckBox, ProgressBar, ComboBox, etc. While that isn’t new, it also isn’t something that you are giving up when you use C#. In the next chapter, you will have the chance to use the built-in controls for data access. You will build a similar parent/child form and when you are done, you’ll have two different ways to accomplish these tasks. info CHAPTER 4 Creating Data Entry Forms with Built-In Controls If you have built Access applications in the past, you know that forms in Access have a nice record navigation box at the bottom (if you don’t shut it off) and that navigation box holds controls that allow you to move between records, add records, delete records, etc.

You can make the code that reads: catch (SqlException f) become: catch (Exception f) That is fine, but it will catch every type of exception. So, let’s assume that you want to do something different for an invalid operation. For now, you will set it to tell you in a message box and to update the box to tell you that it wasn’t updated. If you don’t know what type of exception that error is, you can run it to get the error and the box will tell you what type of exception was unhandled. See the box in Figure 2-4.

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