ado.net入门小例子

Imports System.Data.SqlClient
Imports System.Data
Imports System.Data.Common

Public Class Form1
Inherits System.Windows.Forms.Form

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim conn As New SqlConnection("data source=localhost;initial catalog=StudentCourse;" & _
"User ID=;Password=;")
Dim ds As New DataSet
Try
conn.Open() '在形成SqlDataAdapter前打开conn
Dim daAuthors As New SqlDataAdapter("Select * From SC", conn)
Dim bldr As New SqlCommandBuilder(daAuthors)
daAuthors.Fill(ds,"SC")
conn.Close() '在填充完ds后关闭连接，接着对ds进行操作

Dim tbl As New DataTable
tbl = ds.Tables("SC")

Dim rowVals(3) As Object
rowVals(0) = "5"
rowVals(1) = "00003"
rowVals(2) = "0001"
rowVals(3) = 99
Dim insertedRow As DataRow
insertedRow = tbl.Rows.Add(rowVals) '添加一行

tbl.Rows(0).Delete() '删除一行

tbl.Rows(1).BeginEdit()
tbl.Rows(1)("score") = 89 '修改一行
tbl.Rows(1).EndEdit()

conn.Open()
daAuthors.Update(ds.Tables("SC")) '须将结果传回数据源时打开连接，update
conn.Close()
Catch ex As Exception
MessageBox.Show(ex.Message)
End Try
End Sub
End Class ///by http://www.jb200.com