如果文件名不同，如何删除旧文件并添加新文件 [英] how to delete the old file and add new file if the filename is different

问题描述

protected void btnsubmit_Click(object sender, EventArgs e)
{
	if (FileUpload1.HasFile)
	{
		if (checkfiletype(FileUpload1.PostedFile.FileName))
		{
			string filepath = "~/VolunteerResumes/" + page2.ID + "_" + FileUpload1.FileName;
			FileUpload1.SaveAs(Server.MapPath(filepath));
		}
	}
}

推荐答案

Dim Image_Location As String = ""
                        ranNumber = rndNumber.Next()
                        strPath = "~\ChartImages" & "\User_" & System.Web.HttpContext.Current.Session("UserId") & "\Report_" & ChartTableID & "\"
                        .ImageType = ChartImageType.Jpeg
                        If Not IsNothing(System.Web.HttpContext.Current.Session) Then
                            If Not IsNothing(System.Web.HttpContext.Current.Session("UserId")) Then
                                Image_Location = HttpContext.Current.Server.MapPath(strPath)
                            End If
                            .ImageStorageMode = ImageStorageMode.UseImageUrl
                            If Image_Location <> "" Then
                                Dim _dir As New DirectoryInfo(Image_Location)
                                If Not _dir.Exists Then
                                    _dir.Create()
                                End If
                                .ImageUrl = strPath & ranNumber
                            End If
                        End If

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