求助:Webb.WAVE.Controls.Upload.WebbUpload,未引用到对象

Question

 设计页面:
<input contentEditable="false"  type="file" size="40" name="m_files" id="m_files" />
 代码:
   protected void Button1_Click(object sender, System.EventArgs e)
    {
            string m_path = Path.Combine(MapPath("."), "pic");
            WebbUpload m_upload = new WebbUpload();
            UploadFileCollection m_files = m_upload.GetUploadFileList("m_files");
            string m_filePath = string.Empty;            foreach (UploadFile m_file in m_files)
            {
                if (m_file.FileName != null || m_file.FileName != string.Empty)
                {
                    m_filePath = Path.Combine(m_path, Path.GetFileName(m_file.ClientFullPathName));
                    m_file.SaveAs(m_filePath);                    this.Label1.Text += "<a href='uploadedFiles\\" + m_file.FileName + "'>uploadedFiles\\" + Path.GetFileName(m_file.ClientFullPathName) + "</a><p>";
                }
            }
    }出错:进入foreach循环时
“m_file.ExtendName”引发了“System.NullReferenceException”类型的异常

Answer 1

<input contentEditable="false" runat="server" type="file" size="40" name="m_files" id="m_files" />