allowmultiple =“true”的代码是什么？ （上传文件） [英] What is the code for allowmultiple=“true”? (fileupload)

问题描述

I want to upload multiple files with fileupload. That works :) But it should upload multiple files with a Limit of 5 files. 

Here is my behind code:

protected void btnUpload_Click(object sender, EventArgs e)
        {

            StartUpLoad();
        }

        private void StartUpLoad()
        {
            string imgName = FileUpload1.FileName;
            string imgPath = "~/Uploads/" + imgName;
            int imgSize = FileUpload1.PostedFile.ContentLength;
            string ext = System.IO.Path.GetExtension(this.FileUpload1.PostedFile.FileName);
            if (FileUpload1.PostedFile != null && FileUpload1.PostedFile.FileName != "")
            {
                if (ext.ToUpper().Trim() != ".JPG" && ext.ToUpper() != ".PNG" && ext.ToUpper() != ".GIF" && ext.ToUpper() != ".JPEG")
                {
                    Page.ClientScript.RegisterClientScriptBlock(typeof(Page), "Alert", "alert('Only .jpg, .png oder .gif!')", true);
                }

                else
                {

                    FileUpload1.SaveAs(Server.MapPath("~/Uploads/") + FileUpload1.FileName);
                    Page.ClientScript.RegisterClientScriptBlock(typeof(Page), "Alert", "alert('Saved!')", true);

                }
            }
        }

我尝试过：



我想，应该有点数......但我不确定.....

What I have tried:

I think, that there should be something with count...but I am not sure.....

推荐答案

参考 - 在Visual Studio 2012和2013中使用ASP.Net 4.5 FileUpload控件上载多个文件 [ ^ ]。



FileUpload.PostedFiles 会给你一个Count方法来计算文件数。

Refer - Upload multiple files with ASP.Net 4.5 FileUpload control in Visual Studio 2012 and 2013[^].

FileUpload.PostedFiles would give you a Count method to count the number of files.

这篇关于allowmultiple =“true”的代码是什么？ （上传文件）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！