7+ Vb Net Tableadapter 使い方 For You

Remove File And Directory C, JAVA,PHP, Programming ,Source Code from 1bestcsharp.blogspot.com

Introduction

VB Net is a popular programming language used to build desktop applications. It comes with a powerful tool called TableAdapter, which allows developers to interact with databases easily. In this article, we will explore the basics of using TableAdapter in VB Net.

What is TableAdapter?

TableAdapter is a component in VB Net that acts as a bridge between the application and the database. It enables developers to query, insert, update, and delete data from the database without writing any SQL queries. TableAdapter is a part of the ADO.Net framework, which simplifies database programming in VB Net.

Creating a TableAdapter

To create a TableAdapter, you need to follow these steps:

Step 1:

Open your VB Net project and go to the Solution Explorer. Right-click on your project and select "Add New Item."

Step 2:

In the "Add New Item" dialog box, select "DataSet" and give it a name. Click "Add" to create a new dataset.

Step 3:

Go to the "Data Sources" window and drag and drop a table from your database onto the dataset.

Step 4:

Once you've added the table to the dataset, right-click on the table and select "Add Query." This will open the "Add TableAdapter Query" dialog box.

Step 5:

In the "Add TableAdapter Query" dialog box, select the type of query you want to add (e.g., Select, Insert, Update, Delete). Follow the wizard to complete the query.

Using TableAdapter

Now that you have created a TableAdapter, you can use it to interact with the database. Here are some basic operations that you can perform using TableAdapter:

Selecting Data:

To select data from the database, you can use the Fill method of TableAdapter. Here's an example:

Dim adapter As New MyDataSetTableAdapters.MyTableAdapter()

Dim dataTable As New MyDataSet.MyDataTable()

adapter.Fill(dataTable)

This code creates a new instance of the TableAdapter and fills a DataTable with data from the database. You can then use this DataTable to display the data in your application.

Inserting Data:

To insert data into the database, you can use the Insert method of TableAdapter. Here's an example:

Dim adapter As New MyDataSetTableAdapters.MyTableAdapter()

adapter.Insert("John", "Doe")

This code creates a new instance of the TableAdapter and inserts a new record into the database.

Updating Data:

To update data in the database, you can use the Update method of TableAdapter. Here's an example:

Dim adapter As New MyDataSetTableAdapters.MyTableAdapter()

adapter.Update("Jane", "Doe", 1)

This code creates a new instance of the TableAdapter and updates an existing record in the database.

Deleting Data:

To delete data from the database, you can use the Delete method of TableAdapter. Here's an example:

Dim adapter As New MyDataSetTableAdapters.MyTableAdapter()

adapter.Delete(1)

This code creates a new instance of the TableAdapter and deletes an existing record from the database.

Conclusion

TableAdapter is a powerful tool in VB Net that simplifies database programming. It allows developers to interact with databases easily without writing any SQL queries. In this article, we have explored the basics of using TableAdapter in VB Net. We hope that this guide has been helpful to you in your database programming journey.