不能隐式地将字符串转换为int

Question

        TextBox1.Enabled = false;
        finalpricebox.Items.Clear();
        namebox.Items.Clear();
        int current = 0;
        pricebox.Items.Clear();
        if (CheckBox1.Checked == true)
        {
            request.Navigate("http:----------" + TextBox1.Text);
        }
        else if (CheckBox1.Checked == false)
        {
            request.Navigate("http://----" + TextBox1.Text);
        }
        namebox.Focus();
        while (!(request.ReadyState == WebBrowserReadyState.Complete))
        {
            Application.DoEvents();
        }
        WebClient tClient = new WebClient();

        int resultnr = request.Document.GetElementById("searchResults_total").OuterText;
        if (resultnr > 30)
        {
            resultnr = 30;
        }

它表示不能将字符串转换为int。在线

int resultnr = request.Document.GetElementById（＆＃34; searchResults_total＆＃34;）。OuterText;         if（resultnr> 30）

为什么我会收到此错误，我真的希望有人可以帮助我

Answer 1

int resultnr = Convert.ToInt32(request.Document.GetElementById("searchResults_total").OuterText);

Answer 2

建议使用Int32.TryParse作为安全方

  int resultnr =0;
  if(int.TryParse(request.Document.GetElementById("searchResults_total").OuterText,out resultnr )
   {
        if (resultnr > 30)
        {
            resultnr = 30;
        }
   }