HtmlInputFile value not being passed back

Question

User-2117647399 posted

I have added an HtmlInputFile HtmlControl to my .aspx page using a "devicespecific" mobile control as follows:

<mobile:panel id="pnlAttachment" runat="server">
    <mobile:devicespecific id="dspAttachment" runat="server">
        <choice>
            <contenttemplate>
                <input id="fleAttachment" type="file" size="60" runat="server">
            </contenttemplate>
        </choice>
    </mobile:devicespecific>
</mobile:panel>

I then try to access the value of the HtmlInputFile control in my C# code as follows:

System.Web.UI.HtmlControls.HtmlInputFile fleAttachment = (System.Web.UI.HtmlControls.HtmlInputFile) pnlAttachment.Controls[0].FindControl("fleAttachment");

if (fleAttachment.Value.Trim() != string.Empty)
{
    //process attachment
}

I have used the same technique to obtain the value entered for a multiline TextBox WebControl object, but for some reason the "Value" property of my HtmlInputFile object is always an empty string, even if a value is set on the client by browsing to a file.

Does anyone have any idea why the value is not being passed back to the server?

 

 

Answer 1

User731069546 posted

You are right. I just tried this in my VB.NET code and using FindControl, I can not find any HTML controls. FidnControl works fine for other WebControls or Mobile Controls.

Maybe it got something to do with HTML Controls.

Answer 2

User-1769650146 posted

 if you don't mind to see from my idea on Language=VB

On my WebForm

<INPUT class="txtname" id="txtFilePriceList" style="WIDTH: 480px; HEIGHT: 17px" type="file" size="60" name="txtFilePriceList" runat="server">

And when I want to get string from txtFilePriceList, so i get it from
xxx = txtFilePriceList.PostedFile.FileName

And when i want to get FileName from it i use
xFileName = System.IO.Path.GetFileName(txtFilePriceList.PostedFile.FileName)

i hope it helps!