Data report in vb net7/31/2023 Navigate to your desired Form’s code window and add the following Imports statement to import the Namespace equipped to handle Access or SQL Server databases:Īccess Imports 'Import Access Db Handling Capabilities StudentNumber, which has numeric data type.StudentSurname, which has a Text data type.StudentName, which has a Text data type.Just in case you don’t want to read the Data Controls article, you should create a Table named StudentInfo inside a database named Students, and then create these three fields: Just a further note: The sample databases I am making use of today has also been created with the said article. There I explained how to set up design time database connections. For interest sake, you may want to have a look at the article entitled Exploring theDatae Controls in Visual Basic.NET I wrote earlier. You do not need to concern yourself with setting up database connections now, as you will do it all in code. You can name the objects anything you like, but keep in mind that I may have named my objects differently. It is your choice if you want to do both, as I don’t know your needs, hence the reason why I will demonstrate both.ĭesign your Forms to resemble Figure 1 and Figure 2 respectively. With this article, I will demonstrate how to use Parameters within your queries to a Microsoft Access database, as well as an SQL Server database. For our project, we will make use of Visual Basic 2012, so open it, and start a new Windows Forms Project. To get a better understanding of how parameters work, I decided to let you create a little app utilizing parameters in all your queries. As always, there are numerous ways to skin a cat, whichever one you choose depends on the project at hand, performance, as well as, I suppose, your personal preference. Here, you create the parameter and set its data type. Another way to add a parameter looks like this: = txtStudentNumber.Text The user is now able to type any value inside the txtSearch textbox, and it will be added to the final query that will run on the database. Here, I add a parameter to a Command object (which I will explain later in more detail) called Name and supply the value of whatever text has been entered into the txtSearch TextBox. To supply a value to the parameter, you can use the following VB.NET code: 'Create Parameter Instead Of Hardcoding Values This comes in handy, because now we do not need to hardcode the values we wanted inside our query’s condition, as well as we solve the risk of SQL Injection. We all know by now (or should) that with a Condition, you can narrow your search down better.Ī simple example of an SQL Query containing a parameter looks like this: "Select * From StudentInfo where StudentName = this case, Name is a parameter. This information usually works in conjunction with a condition inside the SQL query. OK, so what is a parameter? A parameter is additional information you can supply to an SQL Query. Well, parameterized Queries are basically the same as an ordinary query, but, they allow you to make use of parameters inside your queries. More information on Queries can be found in an earlier article of mine entitled Doing Data Extraction with VB.NET. In case you don’t know what a query is, let me explain : A query is used to retrieve data from a database table, or to do a certain action, such as inserting and deleting of records. Hello again! Today I will talk about parameterized queries and the reporting options you have available in your VB.NET applications.
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