索引 Append 方法示例 (VB)

以下代码演示如何创建新的索引。 索引基于表中的两列。

Attribute VB_Name = "IndexesAppend"  
Option Explicit  
  
' BeginCreateIndexVB  
Sub Main()  
    On Error GoTo CreateIndexError  
  
    Dim tbl As New Table  
    Dim idx As New ADOX.Index  
    Dim cat As New ADOX.Catalog  
  
    'Open the catalog.  
    cat.ActiveConnection = "Provider='Microsoft.Jet.OLEDB.4.0';" & _  
        "Data Source='Northwind.mdb';"  
  
    ' Define the table and append it to the catalog.  
    tbl.Name = "MyTable"  
    tbl.Columns.Append "Column1", adInteger  
    tbl.Columns.Append "Column2", adInteger  
    tbl.Columns.Append "Column3", adVarWChar, 50  
    cat.Tables.Append tbl  
    Debug.Print "Table 'MyTable' is added."  
  
    ' Define a multi-column index.  
    idx.Name = "multicolidx"  
    idx.Columns.Append "Column1"  
    idx.Columns.Append "Column2"  
  
    ' Append the index to the table.  
    tbl.Indexes.Append idx  
    Debug.Print "The index is appended to table 'MyTable'."  
  
    'Delete the table as this is a demonstration.  
    cat.Tables.Delete tbl.Name  
    Debug.Print "Table 'MyTable' is deleted."  
  
    'Clean up.  
    Set cat.ActiveConnection = Nothing  
    Set cat = Nothing  
    Set tbl = Nothing  
    Set idx = Nothing  
    Exit Sub  
  
CreateIndexError:  
    Set cat = Nothing  
    Set tbl = Nothing  
    Set idx = Nothing  
  
    If Err <> 0 Then  
        MsgBox Err.Source & "-->" & Err.Description, , "Error"  
    End If  
End Sub  
' EndCreateIndexVB  

另请参阅

Append 方法（ADOX 索引）
索引对象 (ADOX)
索引集合 (ADOX)