C#如何在webBrowser1控制項通過TagName,Name尋找元素(沒有ID時)遍曆表單元素

C#如何在webBrowser1控制項通過TagName,Name查
//防止頁面多次重新整理頁面執行
            if (num == 1)
            {
                string GetUserName = System.Configuration.ConfigurationSettings.AppSettings["Y2000UserName"].ToString();
                string GetUserPassword = System.Configuration.ConfigurationSettings.AppSettings["Y2000UserPassword"].ToString();
                int a = 1;
                int all = webBrowse東四飯店薩芬r1.Document.Body.All.Count;
                for (int i = 0; i < all; i++)
                {
                    HtmlElement GetElement = webBrowser1.Document.All[i];
                    //取到包含input標籤的元素
                    if (GetElement.TagName.ToUpper().ToString() == "INPUT")
                    {
                        //根據input的Name屬性，找到該元素並賦值：給使用者名稱輸入框賦值
                        if (GetElement.Name.ToString() == "UserName")
                        {
                            webBrowser1.Document.All[i].SetAttribute("value", GetUserName);
                        }
                       士大夫撒 上大夫大沙發 //根據input的Name屬性，找到該元素並賦值：給密碼輸入框賦值
                        if (GetElement.Name.ToString() == "Passwd")
                        {
                            webBrowser1.Document.All[i].SetAttribute("value", GetUserPassword);
                        }1
                    //根據input的Name屬性，找到提交按鈕並執行動作
                    if (GetElement.Name.ToString() == "Submit")
                    {222222
                        //過濾點擊頁面中相同"name=Submit"的元素
                        if (a == 1)
                        {
                            webBrowser1.Document.All[i].InvokeMember("click");
                        }
                        a++;
                    }
                }
                num++;
            }

元素(沒有ID時)遍曆表單元素