asp.net File.Delete刪除檔案失敗解決方案

asp教程.net file.delete刪除檔案失敗解決方案

if(file.exists(server.mapparh("~/"+filename))
  file.delete(server.mapparh("~/"+filename));

下面看詳細刪除代碼

protected sub button2_click(byval sender as object, byval e as eventargs) handles button2.click
        dim myc as sqlconnection = new sqlconnection("server=127.0.0.1;uid=fay;pwd=19891016;database=studentdb;")
        myc.open()
        dim insertstr as string = "delete chengji "
        dim cmd as sqlcommand = new sqlcommand(insertstr, myc)
        cmd.executenonquery()
        dim file as fileinfo
        dim filename as string = fileupload1.filename
        file = new fileinfo(server.mappath(("~ newfolder1") + filename))
        file.delete()
        myc.close()
    end sub

如果出現檔案無法刪除操作如下

用線程調用一個函數a()時，在a()中有file.delete，出現"對xxx路徑訪問被拒絕"

而沒有線程時就完成正確

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