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javascript - 将 JavaScript 组件包含到 Blazor 组件中

转载 作者:行者123 更新时间:2023-12-03 08:22:01 25 4
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我刚刚开始使用 Blazor,尝试建立一些简单的项目来了解如何与不同的部件和组件进行交互。我一直在尝试将 dhtmlxGantt 包含到 Blazor 索引页中。它似乎通过用 dhtmlxGantt 中的示例替换 index.html 内容来工作。然而,结果我只得到甘特图,没有任何其他 Blazor 组件。如何以正确的方式执行此操作,以便我能在首页index.razor 上看到甘特图?

index.html:

<!DOCTYPE html>
<html>

<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
<title>DHX.Gantt</title>
<base href="/" />
<link href="css/bootstrap/bootstrap.min.css" rel="stylesheet" />
<link href="css/app.css" rel="stylesheet" />
<link href="DHX.Gantt.styles.css" rel="stylesheet" />
<link href="manifest.json" rel="manifest" />
<link href="https://cdn.dhtmlx.com/gantt/edge/dhtmlxgantt.css" rel="stylesheet" type="text/css" />
<script src="https://cdn.dhtmlx.com/gantt/edge/dhtmlxgantt.js"></script>
<script>
document.addEventListener("DOMContentLoaded", function (event) {
// specifying the date format
gantt.config.date_format = "%Y-%m-%d %H:%i";
// initializing gantt
gantt.init("gantt_here");

// initiating data loading
gantt.load("/api/data");
// initializing dataProcessor
var dp = new gantt.dataProcessor("/api/");
// and attaching it to gantt
dp.init(gantt);
// setting the REST mode for dataProcessor
dp.setTransactionMode("REST");
});
</script>
<link rel="apple-touch-icon" sizes="512x512" href="icon-512.png" />
</head>

<body>
<div id="app">Loading...</div>

<div id="blazor-error-ui">
An unhandled error has occurred.
<a href="" class="reload">Reload</a>
<a class="dismiss">🗙</a>
</div>
<script src="_framework/blazor.webassembly.js"></script>
<script>navigator.serviceWorker.register('service-worker.js');</script>
</body>

</html>

索引.razor

@page "/"
@inject IJSRuntime jsRuntime

<h1>Hello, world!</h1>

Welcome to your new app. OOOO 1123154

<SurveyPrompt Title="How is Blazor working for you? jjjj" />

<div id="gantt_here" style="width: 100%; height: 100vh;"></div>

@code{
}

基本上我需要以某种方式将以下部分放入 Index.razor 中,否则 Index.razor 上的甘特图无法找到必要的资源:

  <script src="https://cdn.dhtmlx.com/gantt/edge/dhtmlxgantt.js"></script>
<script>
document.addEventListener("DOMContentLoaded", function (event) {
// specifying the date format
gantt.config.date_format = "%Y-%m-%d %H:%i";
// initializing gantt
gantt.init("gantt_here");

// initiating data loading
gantt.load("/api/data");
// initializing dataProcessor
var dp = new gantt.dataProcessor("/api/");
// and attaching it to gantt
dp.init(gantt);
// setting the REST mode for dataProcessor
dp.setTransactionMode("REST");
});
</script>

最佳答案

考虑injecting the javascript以便它在 Blazor 在页面上启动后立即运行。

我们可以实现此目的的一种方法是更改​​ Blazor 在页面首次加载时启动的方式。

wwwroot/index.html (Blazor WebAssembly) 或 Pages/_Host.cshtml (Blazor 服务器)我们可以修改 Blazor 初始化以在 Blazor 启动后调用脚本。

例如(Blazor WebAssembly):

<body>
<!-- The Rest of the wwwroot/index.html -->
<script src="https://cdn.dhtmlx.com/gantt/edge/dhtmlxgantt.js"></script>
<script src="_framework/blazor.{webassembly|server}.js"
autostart="false"></script>
<script>
Blazor.start().then(function () {
// specifying the date format
gantt.config.date_format = "%Y-%m-%d %H:%i";
// initializing gantt
gantt.init("gantt_here");

// initiating data loading
gantt.load("/api/data");
// initializing dataProcessor
var dp = new gantt.dataProcessor("/api/");
// and attaching it to gantt
dp.init(gantt);
// setting the REST mode for dataProcessor
dp.setTransactionMode("REST");
});
</script>
</body>

如果您需要动态地任意调用此函数(例如在不同的组件上),则可以选择另一种选择。您可以创建本地 .js javascript 文件 wwwroot/MyCustomScript.js并导入https://cdn.dhtmlx.com/gantt/edge/dhtmlxgantt.js并创建一个方法来初始化 dhtmlxgantt我们可以使用 IJSRuntime 从任何组件调用.

例如: wwwroot/MyCustomScript.js

import 'https://cdn.dhtmlx.com/gantt/edge/dhtmlxgantt.js';

export function InitDHTML() {
// specifying the date format
gantt.config.date_format = "%Y-%m-%d %H:%i";
// initializing gantt
gantt.init("gantt_here");

// initiating data loading
gantt.load("/api/data");
// initializing dataProcessor
var dp = new gantt.dataProcessor("/api/");
// and attaching it to gantt
dp.init(gantt);
// setting the REST mode for dataProcessor
dp.setTransactionMode("REST");
}

我们可以使用 IJSRuntime 从任何组件调用该方法.

例如:Pages/Index.razor

// inject the runtime so we can import javascript from local files
@inject IJSRuntime JS

@{
private IJSObjectReference importedDHTML;
protected override async Task OnAfterRenderAsync(bool firstRender)
{
if (firstRender)
{
// import the script from the file
importedDHTML = await JS.InvokeAsync<IJSObjectReference>(
"import", "./MyCustomScript.js");

// Initialize dhtmlxgantt
await importedDHTML.InvokeAsync<IJSObjectReference>(
"InitDHTML");
}
}
}

关于javascript - 将 JavaScript 组件包含到 Blazor 组件中,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/67560407/

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