无法将类添加到 aspx.cs 文件

Question

我的网站项目中有 2 个文件，Translator2.aspx 和 Translator2.aspx.cs。我想将新类(Erwin：Translator2(添加到我的Translator2.aspx.cs文件中。但是它是这样的错误：

严重性代码说明 项目文件行抑制状态
错误"translator2_aspx"不包含"开关"的定义 并且没有扩展方法"Switch"接受类型的第一个参数 可以找到"translator2_aspx"(您是否缺少使用指令 还是程序集引用？
C：\Users\erwin.surya\Documents\Visual Studio 2017\网站\网站1\翻译器2.aspx 33

这是我的翻译器2.aspx代码：

<%@ Page Language="C#" Async="true" AutoEventWireup="true" CodeFile="Translator2.aspx.cs" MasterPageFile="~/Site.Master"   Inherits="Translator2" %>
<asp:Content runat="server" ID="BodyContent" ContentPlaceHolderID="MainContent">

<div class="form-group">
<asp:Label runat="server" AssociatedControlID="English" CssClass="col-md-2 control-label">English</asp:Label>
<div class="col-md-10">
<asp:TextBox  Height="79px" TextMode="MultiLine" Width="452px"  runat="server" ID="English" CssClass="form-control" />
</div>      </div>  

<div class="col-md-offset-2 col-md-10">
<asp:Button runat="server" OnClick="Submit"  Height="39px" Width="100px" Text="Translate" CssClass="btn btn-default" />
</div>
<div class="col-md-offset-2 col-md-10">
<asp:Button runat="server" OnClick="Switch" Height="39px" Width="100px" Text="Switch" CssClass="btn btn-default" />
</div>

<br /><br /><br />
<div class="form-group">
<asp:Label runat="server" AssociatedControlID="Japanese" CssClass="col-md-2 control-label">Japanese</asp:Label>
<div class="col-md-10">
<asp:TextBox Height="79px" TextMode="MultiLine" Width="452px"   runat="server" ID="Japanese" CssClass="form-control" />
</div></div> 
<br /><br />
<asp:PlaceHolder runat="server" ID="ErrorMessage" Visible="false">
<p class="text-danger">
<asp:Literal runat="server" ID="FailureText" />
</p>
</asp:PlaceHolder>
</asp:Content>

这是我的翻译器2.aspx.cs代码：

partial class Translator2 : Page
{
public async void Submit(object sender, EventArgs e)
{

string key = "92fcf1387f844a8";
var authTokenSource = new AzureAuthToken(key.Trim());
string authToken;
try
{
authToken = await authTokenSource.GetAccessTokenAsync();
}
catch (HttpRequestException)
{
if (authTokenSource.RequestStatusCode == HttpStatusCode.Unauthorized)
{
Console.WriteLine("Request to token service is not authorized (401). Check that the Azure subscription key is valid.");
return;
}
if (authTokenSource.RequestStatusCode == HttpStatusCode.Forbidden)
{
Console.WriteLine("Request to token service is not authorized (403). For accounts in the free-tier, check that the account quota is not exceeded.");
return;
}
throw;
}

string output = "";
string text = English.Text;
string uri = "https://api.microsofttranslator.com/v2/Http.svc/Translate?text=" + HttpUtility.UrlEncode(text) + "&from=" + "en" + "&to=" + "ja";
HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(uri);
httpWebRequest.Headers.Add("Authorization", authToken);
using (WebResponse response = httpWebRequest.GetResponse())
using (Stream stream = response.GetResponseStream())
{
DataContractSerializer dcs = new DataContractSerializer(Type.GetType("System.String"));
string translation = (string)dcs.ReadObject(stream);
Console.WriteLine("Translation for source text '{0}' from {1} to {2} is", text, "en", "ja");
Console.WriteLine(translation);
output = translation;
}
Japanese.Text = output;
}
class Erwin : Translator2
{
string from, to;
public void SwapStrings(string s1, string s2)
{
string temp = s1;
s1 = s2;
s2 = temp;

from = s1;
to = s2;
testing.Text = from;
testing1.Text = to;
}
protected void Switch(object sender, EventArgs e)
{
string str1 = testing.Text;
string str2 = testing1.Text;
System.Console.WriteLine("Inside Main, before swapping: {0} {1}", str1, str2);
SwapStrings(str1, str2);
}
}

你知道为什么我不能添加 Erwin：Translato2 类吗？ 在我添加类之前，一切正常。我错过了什么吗？

Answer 1

Switch方法与为 aspx 页提供支持的类位于不同的类中。如果你想让switch成为某种实用方法，你应该创建一个新类，也许Erwin在一个完全独立的文件(Erwin.cs(，并在里面有一个switch方法，它是公共的，可能是静态的。我还注意到switch不会返回任何内容，因此不确定您要用它完成什么。

按钮的OnClick处理程序应该在后面的代码中 - 即在Translator2类中。 在此处理程序中，您可以调用Erwin.Switch()。