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數(shù)據(jù)源。這樣大大減少了連接過(guò)多對(duì)于數(shù)據(jù)庫(kù)服務(wù)器資源的占用。下面是我在《ADO.NET實(shí)用指南》這本書(shū)上看到的一個(gè)例子，比較清楚的講解
了ADO.NET的使用方法。
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前打開(kāi)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后關(guān)閉連接，接著對(duì)ds進(jìn)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() '刪除一行
tbl.Rows(1).BeginEdit()
tbl.Rows(1)("score") = 89 '修改一行
tbl.Rows(1).EndEdit()
conn.Open()
daAuthors.Update(ds.Tables("SC")) '須將結(jié)果傳回?cái)?shù)據(jù)源時(shí)打開(kāi)連接，update
conn.Close()
Catch ex As Exception
MessageBox.Show(ex.Message)
End Try
End Sub
End Class
AspNet技術(shù)：一個(gè)經(jīng)典的ADO.NET入門(mén)例子，轉(zhuǎn)載需保留來(lái)源！
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