fileupload postedfile始终不为null [英] fileupload postedfile is always not null

问题描述

<asp:FileUpload ID="FileUpload1" runat="server" onchange="fileCheck(this);" />

if (FileUpload1.PostedFile != null)
            {
                fileName1 = FileUpload1.FileName;
                filePath1 = Server.MapPath("Image/" + System.Guid.NewGuid() + fileName1);
                FileUpload1.SaveAs(filePath1);
                int getPos = filePath1.LastIndexOf("\\");
                int len = filePath1.Length;
                getPath1 = filePath1.Substring(getPos, len - getPos);
                pathToStore1 = getPath1.Remove(0, 1);
            }

我在我的项目中使用fileupload但是如果阻塞它总是进入内部，但我不是通过fileupload选择任何东西。

I am using fileupload in my project but it always goes inside if block, but i am not select anything by fileupload.

推荐答案

嗨试试这个

Hi try like this

if ((FileUpload1.PostedFile != null) && (FileUpload1.PostedFile.ContentLength > 0))
        {
            string filename = System.IO.Path.GetFileName(FileUpload1.PostedFile.FileName);

或

or

if(FileUploadControl.HasFile)
{
}

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