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Applications communicate with a database, firstly, to retrieve the data stored there and present it in a user-friendly way, and secondly, to update the database by inserting, modifying and deleting data. An application accesses data either through a dataset or a data reader. Various components of the data provider retrieve data for the application and update data.The following diagram shows the dataset object model: The Data Set class is present in the System. The following table describes all the components of Data Set: Data Row It represents a row in the Data Table. Open() Dim adp As Sql Data Adapter = New Sql Data Adapter _ ("select * from Customers", connection) Dim ds As Data Set = New Data Set() adp. The following example demonstrates the concept: So far, we have used tables and databases already existing in our computer.The Data Row object and its properties and methods are used to retrieve, evaluate, insert, delete, and update values in the Data Table. In this example, we will create a table, add columns, rows and data into it and display the table using a Data Grid View object. Text = "tutorialspont.com" End Sub Private Function Create Data Set() As Data Set 'creating a Data Set object for tables Dim dataset As Data Set = New Data Set() ' creating the student table Dim Students As Data Table = Create Student Table() dataset. Add(Students) Return dataset End Function Private Function Create Student Table() As Data Table Dim Students As Data Table Students = New Data Table("Student") ' adding columns Add New Column(Students, "System.Please consult 'SQL Server' tutorial for creating databases and database tables in SQL Server. Take the following steps: When the application is run using Start button available at the Microsoft Visual Studio tool bar, it will show the following window: In this example, let us access data in a Data Grid View control using code. Load 'TODO: This line of code loads data into the 'Test DBData Set. String", "Student City") ' adding rows Add New Row(Students, 1, "Zara Ali", "Kolkata") Add New Row(Students, 2, "Shreya Sharma", "Delhi") Add New Row(Students, 3, "Rini Mukherjee", "Hyderabad") Add New Row(Students, 4, "Sunil Dubey", "Bikaner") Add New Row(Students, 5, "Rajat Mishra", "Patna") Return Students End Function Private Sub Add New Column(By Ref table As Data Table, _ By Val column Type As String, By Val column Name As String) Dim column As Data Column = _ table. New Row() newrow("Student ID") = id newrow("Student Name") = name newrow("Student City") = city table. Add(newrow) End Sub Private Sub Button1_Click(sender As Object, e As Event Args) Handles Button1.Click Dim ds As New Data Set ds = Create Data Set() Data Grid View1.
Documented image databases are essential for the development of quantitative image analysis tools especially for tasks of computer-aided diagnosis (CAD). Digital Chest X-ray database established to facilitate comparative studies on segmentation of the lung fields, the heart and the clavicles in standard posterior-anterior chest radiographs.
A data provider is used for connecting to a database, executing commands and retrieving data, storing it in a dataset, reading the retrieved data and updating the database. Net consists of the following four objects: Data Adapter This is integral to the working of ADO.
Net since data is transferred to and from a database through a data adapter.
TCIA Collection: ACRIN CT Colonography Collection for colonic polyp detection from CT with XLS sheets that provide polyp descriptions and their location within the colon segments ( TCIA Collections Page). A resource for increased quantitative understanding of machine acquisition, analytic reproducibility and image processing.
TCIA Collections Page (in transfer from NBIA) Challenges, sometimes termed grand challenges provide data sets for the purpose of comparison of different analysis methods.