javascript 在 SignalR 中调用服务器和客户端方法
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/20471468/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Calling server and client method in SignalR
提问by Suman Biswas
Below code with ASP.Net SignalR Hub technology. These codes are not working as expected. When I am clicking on Hello Butting it is working fine but when I am clicking on UserList nothing is happening. I have placed an alert and found server method is invoking but after that nothing happening.
下面是使用 ASP.Net SignalR Hub 技术的代码。这些代码没有按预期工作。当我点击 Hello Butting 时它工作正常，但是当我点击 UserList 时什么也没有发生。我已经发出警报，发现服务器方法正在调用，但之后什么也没有发生。
JavaScript
JavaScript
$(function () {
// Declare a proxy to reference the hub.
var chat = $.connection.chatHub;
chat.client.OnlineFriends = function (userLists) {
alert(userLists);
};
chat.client.Hello = function (message) {
alert(message);
};
// Start the connection.
$.connection.hub.start().done(function () {
$('#btnGetUser').click(function () {
chat.server.Friends();
});
$('#btnHello').click(function () {
chat.server.test("message to server from client");
//
});
});
});
and C# code
和 C# 代码
public class ChatHub : Hub
{
public void Test(string str)
{
Clients.Caller.Hello(str + " | Message received at server reply from server.");
}
public void Friends()
{
Clients.Caller.OnlineFriends("myid");
}
}
and HTML
和 HTML
<div>
<input type="button" id="btnHello" value="Hello" />
<input type="button" id="btnGetUser" value="UserList" />
</div>
Please help to find out what is the problem.
请帮助找出问题所在。
回答by scheien
Could you try to change the line
你能不能试试换线
chat.server.Friends();
to:
到：
chat.server.friends();
I guess the generated javascript has the java convention on naming. That is the only difference I can see from those two methods.
我猜生成的 javascript 有命名的 java 约定。这是我从这两种方法中看到的唯一区别。
回答by scheien
As mentioned by @scheien you need to call the method using a lower case first letter. Optionally, you can specify the hub method name as detailed here.
正如@scheien 所提到的，您需要使用小写的第一个字母来调用该方法。或者，您可以指定中心方法名称，详见此处。
[HubMethodName("MyNewMethodName")]
public void Friends()
and then call server functions using that new name
然后使用该新名称调用服务器函数
chat.server.MyNewMethodName();
回答by user3071591
chat.client.onlineFriends = function (userLists) {
alert(userLists);
};
but...... userListsdoes not exist on the hub:
但是...... userLists在集线器上不存在：
Clients.CalleronlineFriends("myid");
This was one thing, and another thing that cought my eye was that the javascript part doesn't start with a capital letter
这是一回事，另一件让我大吃一惊的是 javascript 部分不是以大写字母开头
So you must also change Friends, Hello, OnlineFriendsinto friends, helloonlineFriends
所以你也必须把Friends, Hello,OnlineFriends变成friends,helloonlineFriends
