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      首頁 > 網站開發 > ASPnet >
      • asp.net教程之ASP實現網頁打開任何類型文件都保存

      • 2017-06-11 20:18 來源:未知
       當頁面上有一個鏈接指向服務器一個Word文件,當客戶端機器有安裝Office時,點擊鏈接將調用Word打開瀏覽;當客戶端機器沒有安裝Office時,點擊鏈接將彈出保存對話框。總結一下即如果瀏覽器認識文件類型,就會自動打開;如果不認識,則會提示客戶保存。可是有時候我們希望不管什么類型文件,都不要打開,直接讓客戶端保存。要達到這個要求,對于保存在服務器硬盤上的文件就得利用ASPUpload組件的SendBinary方法來實現,而對于保存在數據庫中的文件則只須打開記錄集,然后將二進制數據直接輸出到客戶端即可,不過要告訴瀏覽器文件的MIME類型、文件名稱和文件大小。

        1.服務器端硬盤上的文件

      以下是引用片段:
      <% 
      Dim Upload,FilePath 
      Set Upload = Server.CreateObject("Persits.Upload") 
      FilePath = Server.MapPath(".") & "\" & "2003529213019.txt" 
      'SendBinary參數說明: 
      '參數一:文件物理路徑 
      '參數二:是否將文件的MIME類型等信息傳送給瀏覽器 
      '參數三:文件類型,可以指定具體的MIME類型,但一般都可以使用application/octet-binary 
      '參數四:讓客戶端保存文件還是直接打開。True:保存;False(默認):打開 
      Upload.SendBinary FilePath,True,"application/octet-binary",True 
      %> 



        2.服務器端數據庫中的文件

      <% 
      Dim objConn,objRs 
      Set objConn = Server.CreateObject("ADODB.Connection") 
      Set objRs = Server.CreateObject("ADODB.RecordSet") 
      objConn.open "Driver={Microsoft Access Driver (*.mdb)};dbq=" & Server.MapPath("db1.mdb") 
      objRs.open "select * from t5 where id=2",objConn,1,3 
      Response.ContentType = "application/octet-stream" 
      Response.AddHeader "Content-Disposition","attachment;filename=" & objRs("filename") 
      Response.AddHeader "Content-Length",CStr(objRs("size")) '此處必須用CStr轉換 
      Response.BinaryWrite objRs("file") 
      objRs.close 
      Set objRs = nothing 
      objConn.close 
      Set objConn = nothing 
      %> 

        此法要求保存文件時需同時保存文件名及文件大小!若未指定文件名及大小,如果瀏覽器認識該文件類型,將會自動打開;如果不認識,才會提示客戶保存!
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