什么是@section脚本及其用途 [英] What is @section scripts and what it is used for

问题描述

我已经从Microsoft网站下载了一个聊天示例.我一直在关注几个教程，但是在没有此C#代码块(@section脚本{})编写脚本之前，我从未见过@section脚本{}，它似乎可以正常工作，但在此聊天应用程序实例中使用当我确实将脚本带到块外时发出R信号，它不起作用.

I have downloaded a chat example from the Microsoft website. I have been following several tutorials but I have never seen the @section script{} before I have done scripts without this block of c# code (@section script{}) and it seem to work fine but in this instance of the chat application using signal R when I do take the scripts outside the block it does not work.

@section scripts {
<!--Script references. -->
<!--The jQuery library is required and is referenced by default in _Layout.cshtml. -->
<!--Reference the SignalR library. -->
<script src="~/Scripts/jquery.signalR-2.2.0.min.js"></script>
<!--Reference the autogenerated SignalR hub script. -->
<script src="~/signalr/hubs"></script>
<!--SignalR script to update the chat page and send messages.-->
<script>
    $(function () {
        // Reference the auto-generated proxy for the hub.
        var chat = $.connection.chatHub;
        // Create a function that the hub can call back to display messages.
        chat.client.addNewMessageToPage = function (name, message) {
            // Add the message to the page.
            $('#discussion').append('<li><strong>' + htmlEncode(name)
                + '</strong>: ' + htmlEncode(message) + '</li>');
        };
        // Get the user name and store it to prepend to messages.
        $('#displayname').val(prompt('Enter your name:', ''));
        // Set initial focus to message input box.
        $('#message').focus();
        // Start the connection.
        $.connection.hub.start().done(function () {
            $('#sendmessage').click(function () {
                // Call the Send method on the hub.
                chat.server.send($('#displayname').val(), $('#message').val());
                // Clear text box and reset focus for next comment.
                $('#message').val('').focus();
            });
        });
    });
    // This optional function html-encodes messages for display in the page.
    function htmlEncode(value) {
        var encodedValue = $('<div />').text(value).html();
        return encodedValue;
    }
</script>
}

推荐答案

section允许您在视图中添加一些内容，然后将其添加到布局中.即:-

A section allows you to add something in a view which will be added in the layout. ie:-

视图

@section scripts {

    <script>

      alert('foo');

    </script>

}

布局

@RenderSection("scripts", false)

现在将在您在布局中指定的位置呈现此名为section scripts 的脚本.

now this named section scripts will be rendered where you have specified in the layout.

@RenderSection也有2个签名:-

public HelperResult RenderSection(string name) // section required in the view
public HelperResult RenderSection(string name, bool required)

这篇关于什么是@section脚本及其用途的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！