数据库信息读入到内存数组中

通常情况下，如果将数据读入到简单的内存数组中，那么处理少量数据会更容易些。以下方法提供了ADO.NET对象从数据库加载信息到数组，而且该数组可任意自行扩展。

在默认窗体的头部输入如下代码：
Imports System.Data.OleDb
在按钮的Click事件中：
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim myConn As OleDbConnection
Dim myCmd As OleDbCommand
Dim myReader As OleDbDataReader
Dim myConnStr As String
Dim myArray(0) As String
Dim i As Integer

myConnStr = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=JLGL.mdb"
myConn = New OleDbConnection(myConnStr)
myCmd = New OleDbCommand()
myCmd.CommandType = CommandType.Text
myCmd.CommandText = "select * from JXB"
myCmd.Connection = myConn
myConn.Open()
myReader = myCmd.ExecuteReader
Do While myReader.Read
myArray(i) = myReader!出厂编号
TextBox1.Text = TextBox1.Text & myArray(i) & vbCrLf
ReDim Preserve myArray(UBound(myArray) + 1)
i += 1
Loop
Label1.Text = i 'i为记录条数

myConn.Close()

End Sub