Views 集合与 CommandText 属性的示例 (VB)

  • 项目

适用于：Access 2013、Office 2013

下面的代码演示如何使用 Command 属性更新视图的文本。

 
' BeginViewsCollectionVB 
Sub Main() 
 On Error GoTo ViewTextError 
 
 Dim cnn As New ADODB.Connection 
 Dim cat As New ADOX.Catalog 
 Dim cmd As New ADODB.Command 
 
 ' Open the Connection 
 cnn.Open _ 
 "Provider='Microsoft.Jet.OLEDB.4.0';" & _ 
 "Data Source='c:\Program Files\Microsoft Office\" & _ 
 "Office\Samples\Northwind.mdb';" 
 
 ' Open the catalog 
 Set cat.ActiveConnection = cnn 
 
 ' Get the command 
 Set cmd = cat.Views("AllCustomers").Command 
 
 ' Update the CommandText of the Command 
 cmd.CommandText = _ 
 "Select CustomerId, CompanyName, ContactName From Customers" 
 
 ' Update the View 
 Set cat.Views("AllCustomers").Command = cmd 
 
 'Clean up 
 cnn.Close 
 Set cat = Nothing 
 Set cmd = Nothing 
 Set cnn = Nothing 
 Exit Sub 
 
ViewTextError: 
 
 Set cat = Nothing 
 Set cmd = Nothing 
 
 If Not cnn Is Nothing Then 
 If cnn.State = adStateOpen Then cnn.Close 
 End If 
 Set cnn = Nothing 
 
 If Err <> 0 Then 
 MsgBox Err.Source & "-->" & Err.Description, , "Error" 
 End If 
End Sub 
' EndViewsCollectionVB