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  • 【ASP】文件上传

    描述:在button事件中注册一个上传事件

    代码详解:

     protected void FileUpload_Click(object sender, EventArgs e)
            {
                bool fileIsvaild = false;    //初始化一个bool型为false的fileIsvaild
                if (this.FileUpload1.HasFile)//哈希判读文件是否存在
                {
                   
                    string fileExtension = System.IO.Path.GetExtension(this.FileUpload1.FileName).ToLower();//获取文件名并转化为小写
                    string[] restrictExtension = { ".gif", ".jpg", "png", ".doc", ".txt" };//设置文件匹配格式
                    for (int i = 0; i < restrictExtension.Length; i++)
                    {
                        if (fileExtension == restrictExtension[i])
                        {
                            fileIsvaild = true;
                        }
                    }
                    if (fileIsvaild == true)
                    {
                        try
                        {
                            this.Image1.ImageUrl = "~/myfile/" + FileUpload1.FileName;  //获取上传文件名
                            this.FileUpload1.SaveAs(Server.MapPath("~/myfile/") + FileUpload1.FileName);//保存文件
                            this.Label5.Text = "上传成功";
                            this.Label5.Text += "<br/>";
                            this.Label5.Text += FileUpload1.FileName + "<br/>";
                            this.Label5.Text += FileUpload1.FileBytes + "<br/>";
                            this.Label5.Text += FileUpload1.ControlStyle + "<br/>";
                        }
                        catch (Exception ex)
                        {
                            this.Label5.Text = "无法上传" + ex.Message;
                        }
                    }

                }
                else
                {
                    Response.Write("<script>alert('上传的文件不存在!')</script>");
                }

            }

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  • 原文地址:https://www.cnblogs.com/baiboy/p/FileUpload.html
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