.net - 在 MVC asp.net 中的客户端 PC 上完成下载后，如何删除文件

Question

我已经使用 getCSV 函数在客户端返回 csv 文件，但我想在客户端下载完成后删除一个文件

我的功能

Public Function GetCSVFile(ByVal listSeperator As String) As CSVResult
    Dim result As Boolean
    Dim Service As New Service()
    Dim types As IList(Of ProductType) = Service.GetAllWithAllLocalizedNames(New ListOptions(Name", OrderByDirection.Ascending, 1, -1))
    Dim path As String, colname As String
    colname = Settings.GetLanguage()
    path = Common.GetLocalizeDataPath()
    Dim seprator As String = Common.GetListSepratorForCSV(listSeperator)
    Dim cs As New CSVGenerator(path, colname, seprator)
    result = cs.CreateCSVFile(types)
    If result Then
        Return New CSVResult With {.FileName = "Sample.csv", .Path = "~/Mydir/Sample.csv"}
    Else
        Return New CSVResult With {.FileName = "Error.csv", .Path = "~/Mydir/Error.csv"}
    End If
End Function

Answer 1

仅当您刷新响应时才对我有用。属性过滤器应该是这样的

    public class DeleteTempFileResultFilter : ActionFilterAttribute
    {
        public override void OnResultExecuted(ResultExecutedContext filterContext)
        {
            string fileName = ((FilePathResult)filterContext.Result).FileName;

            filterContext.HttpContext.Response.Flush();
            filterContext.HttpContext.Response.End();

            System.IO.File.Delete(fileName);
        }
    }