Field2.SaveToFile 方法 (DAO)

适用于：Access 2013、Office 2013

将附件保存到磁盘。

版本信息

添加的版本：Access 2007

语法

表达式 。SaveToFile (FileName)

表达式 一个表示 Field2 对象的变量。

参数

名称	必需/可选	数据类型	说明
FileName	必需	String	附件要保存到的文件的完全限定路径。

示例

下面的代码段说明了如何使用 SaveToFile 方法将指定员工的所有附件保存到磁盘上。

    '  Instantiate the parent recordset.  
       Set rsEmployees = db.OpenRecordset("Employees") 
      
       … Code to move to desired employee 
      
       ' Instantiate the child recordset. 
       Set rsPictures = rsEmployees.Fields("Pictures").Value  
     
       '  Loop through the attachments. 
       While Not rsPictures.EOF 
      
          '  Save current attachment to disk in the "My Documents" folder. 
          rsPictures.Fields("FileData").SaveToFile _ 
                      "C:\Documents and Settings\Username\My Documents" 
          rsPictures.MoveNext 
       Wend 

以下示例演示如何将存储在附件字段中的文件保存到指定的文件夹路径。

示例代码提供方：Microsoft Access 2010 程序员参考。

    Public Function SaveAttachments(strPath As String, Optional strPattern As String = "*.*") As Long
        Dim dbs As DAO.Database
        Dim rst As DAO.Recordset2
        Dim rsA As DAO.Recordset2
        Dim fld As DAO.Field2
        Dim strFullPath As String
        
        'Get the database, recordset, and attachment field
        Set dbs = CurrentDb
        Set rst = dbs.OpenRecordset("tblAttachments")
        Set fld = rst("Attachments")
        
        'Navigate through the table
        Do While Not rst.EOF
        
            'Get the recordset for the Attachments field
            Set rsA = fld.Value
            
            'Save all attachments in the field
            Do While Not rsA.EOF
                If rsA("FileName") Like strPattern Then
                    strFullPath = strPath & "\" & rsA("FileName")
                    
                    'Make sure the file does not exist and save
                    If Dir(strFullPath) = "" Then
                        rsA("FileData").SaveToFile strFullPath
                    End If
                    
                    'Increment the number of files saved
                    SaveAttachments = SaveAttachments + 1
                End If
                
                'Next attachment
                rsA.MoveNext
            Loop
            rsA.Close
            
            'Next record
            rst.MoveNext
        Loop
        
        rst.Close
        dbs.Close
        
        Set fld = Nothing
        Set rsA = Nothing
        Set rst = Nothing
        Set dbs = Nothing
    End Function