Uploading Files in ASP.net without using the FileUpload server control

In your aspx :

<form id="form1" runat="server" enctype="multipart/form-data"> <input type="file" id="myFile" name="myFile" /> <asp:Button runat="server" ID="btnUpload" OnClick="btnUploadClick" Text="Upload" /></form>

In code behind :

protected void btnUploadClick(object sender, EventArgs e){    HttpPostedFile file = Request.Files["myFile"];    //check file was submitted    if (file != null && file.ContentLength > 0)    {        string fname = Path.GetFileName(file.FileName);        file.SaveAs(Server.MapPath(Path.Combine("~/App_Data/", fname)));    }}

Here is a solution without relying on any server-side control, just like OP has described in the question.

Client side HTML code:

<form action="upload.aspx" method="post" enctype="multipart/form-data">    <input type="file" name="UploadedFile" /></form>

Page_Load method of upload.aspx :

if(Request.Files["UploadedFile"] != null){    HttpPostedFile MyFile = Request.Files["UploadedFile"];    //Setting location to upload files    string TargetLocation = Server.MapPath("~/Files/");    try    {        if (MyFile.ContentLength > 0)        {            //Determining file name. You can format it as you wish.            string FileName = MyFile.FileName;            //Determining file size.            int FileSize = MyFile.ContentLength;            //Creating a byte array corresponding to file size.            byte[] FileByteArray = new byte[FileSize];            //Posted file is being pushed into byte array.            MyFile.InputStream.Read(FileByteArray, 0, FileSize);            //Uploading properly formatted file to server.            MyFile.SaveAs(TargetLocation + FileName);        }    }    catch(Exception BlueScreen)    {        //Handle errors    }}

You'll have to set the enctype attribute of the form to multipart/form-data;then you can access the uploaded file using the HttpRequest.Files collection.