Updating dataset in vb net
To change an existing row's data, you can directly assign a row's value. Delete() In this example, I'll show you how to add edit, and remove, data from the Northwind database.
To save data to the data source, you need to call the Data Adapter's Update method. I'll display the result of the Customers table in a Data Grid after adding, updating, and deleting data from the table.
If you need to update the database after changing the Data Set, you can use the Update method of the Data Adapter object, but you have to make sure that the Data Adapter properties are set correctly with Sql Command objects. Data Adapter figures out what has changed and then executes an INSERT, UPDATE, or DELETE command, but as with all database operations, updates to the database can run into problems when the database is being updated by other users, so you often need to include code to anticipate and solve problems when changing the database. If you need a collection and you're serializing the data, a Data Set is the tool to use.
Here's an example showing how to display a field.
I am pulling data from 1 database(QAD) into a Data Set. Open() sql String = "" sql String = "SELECT Inventory_Number, Status, drwg_size FROM Inventory_Test" Inventory_Test = New Sql Data Adapter(sql String, obj Conn) QADStatus = New Data Set QAD. Fill(QADStatus, "Inventory_Test") Dim QADtable As Data Column Dim Inven Table As Data Column Dim data_relation As Data Relation QADtable = QADStatus.
I need help trying to Update a table in a different database(Inventory_Test) with the data collected in the Data Set.
This object reads the database and creates an in-memory copy of that part of the database that your program needs.
In addition to being reliable and easy to use, Data Set supports both a hierarchical view of the data as XML and a relational view that you can manage after your program disconnects.
A Data Set object usually corresponds to a real database table or view, but Data Set is a disconnected view of the database. NET creates a Data Set, there is no need for an active connection to the database, which helps in scalability because the program only has to connect with a database server for microseconds when reading or writing.
The syntax doesn't require it, but you will normally provide the name of the Data Table to load the data into.
To String) Next i Dim connection String As String = "Data Source=MUKUNTUWEAP;" & "Initial Catalog=Booze;" & "Integrated Security=True" Dim cn As New Sql Connection(connection String) Dim command Wrapper As Sql Command = New Sql Command("SELECT * FROM RECIPES", cn) Dim data Adapter As Sql Data Adapter = New Sql Data Adapter Dim my Data Set As Data Set = New Data Set data Adapter. Fill(my Data Set, "Recipes") The Data Set can then be treated as a database in your program code.
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 Dim row1 As Data Row = ds. To test this source code create a Windows application, drop a Data Grid, and three buttons- Insert Command, Update Command, and Delete Command to the form.
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. Listing 5-48 show the code on the Insert Command button-click event.