HTML button click call code behind in asp.net
<input type="button" id="btnuplod" runat="server" value="Upload" onclick="__doPostBack('btnSubmit','Submit');">
Code Behind
protected void Page_Load(object
sender, EventArgs e)
{
if
(IsPostBack)
{
if (Convert.ToString(Request.Form["__EVENTARGUMENT"]) == "Submit")
{
btnuplod_Click();//submit action here
}
}
}
Your Function
Public void btnuplod_Click()
{
if (FileUploadPDF.HasFile)
{
string
fileName = Server.HtmlEncode(FileUpload1.FileName);
string
extension = System.IO.Path.GetExtension(fileName);
if
(extension == ".pdf")
{
}
else
{
lblerror.InnerText = "Please upload PDF Files Only";
}
}
}