C#客户端填充外部IE浏览器中网页文本（input）且不提交

//引用COM组件
//Microsoft HTML Object Library
//Microsoft Internet Controls

 记得改成x86

            SHDocVw.ShellWindows shellWindows = new SHDocVw.ShellWindowsClass();
            string filename;
            foreach (SHDocVw.InternetExplorer ie in shellWindows)
            {
                filename = Path.GetFileNameWithoutExtension(ie.FullName).ToLower();
                if (filename.Equals("iexplore"))
                {
                    SetText(string.Format("Web Site　 : {0}", ie.LocationURL));
                    mshtml.IHTMLDocument2 htmlDoc = ie.Document as mshtml.IHTMLDocument2;
                    SetText(string.Format("　 Document Snippet: {0}",
                    ((htmlDoc != null) ? htmlDoc.body.outerHTML
                    : "***Failed***")));
                    SetText(string.Format("{0}{0}", Environment.NewLine)); 

                    mshtml.HTMLInputElementClass input;
                    foreach (mshtml.IHTMLElement ieElement in htmlDoc.all)
                    {
                        if (ieElement.tagName.ToUpper().Equals("INPUT"))
                        {
                            input = ((mshtml.HTMLInputElementClass)ieElement); 

                            if (input.name == "gmfmc")
                            {
                                input.value = "****";
                            }
                            else if (input.name == "gmfnsrsbh")
                            {
                                input.value = "12300000747150428A";
                            }
                            else if (input.name == "gmfdz")
                            {
                                input.value = "北京市";
                            }
                            else if (input.name == "gmfdz")
                            {
                                input.value = "010-512011";
                            }
                            else if (input.name == "gmfkhh")
                            {
                                input.value = "北京银行";
                            }
                            else if (input.name == "gmfyhzh")
                            {
                                input.value = "132465798798";
                            }
                            else if (input.name == "gmfsjhm")
                            {
                                input.value = "18456487920";
                            }
                            else if (input.name == "gmfyxdz")
                            {
                                input.value = "sa@123.com";
                            }
                        }
                    }
                } 
            }