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Note: The Tables member of Data Set represents all Data Table objects attached to a Data Set. Adding a Data Row to a Data Table In this example, I'll show you how to add edit, and remove, data from the Northwind database.
Listing 5-46 Creates a new Data Row, sets the data of Data Row members, and adds rows to the table using the Add method of Data Table. I'll display the result of the Customers table in a Data Grid after adding, updating, and deleting data from the table.
Run(New Form1()) End Sub ' Initialize the form.
Form Private data Grid View1 As New Data Grid View() Private binding Source1 As New Binding Source() Private data Adapter As New Sql Data Adapter() Private With Events reload Button As New Button() Private With Events submit Button As New Button() _ Public Shared Sub Main() Application.
Hi, I am trying to use a data grid in a web application in which I have three tiers.
The Data Grid is not set up to a data source, or a data adapter, so everytime I make a change I send the cell information to another object which forms an SQL query and makes the query to the DB (actually to a DBFacade object). Data Grid Command Event Args e) Jon Agiato Jon, Without seeing how Update Course works, it is difficult to tell.
To change an existing row's data, you can directly assign a row's value.
To save data to the data source, you need to call the Data Adapter's Update method.
Data Source, Data Table)) End Sub Private Sub Get Data(By Val select Command As String) Try ' Specify a connection string. Show("To run this example, replace the value of the " _ "connection String variable with a connection string that is " _ "valid for your system.") End Try End Sub End Class For information about building this example from the command line for Visual Basic or Visual C#, see Building from the Command Line or Command-line Building With
For example, if you call Delete on a row on the Data Set, then when Update is called on the Data Adapter, the Delete Command of the Data Adapter will be called using the particular row in the Data Set.
Note: Keep in mind that this Update is different than a SQL UPDATE statement.
As you saw in the Data Table, Data Row, and Data Column sections at the beginning of this article, you can use the Delete method of a Data Row to delete a row.
The Add New method of the Data Table adds a row to a Data Table.
To test this source code create a Windows application, drop a Data Grid, and three buttons- Insert Command, Update Command, and Delete Command â€“ to the form.