To add Google Maps to a Blazor application, use the Google Maps API script. To initialize Google Maps in Blazor we need to use a JavaScript interop.
Add the following scripts to ~/Pages/_Layout.cshtml /_Host.cshtml for Server Blazor app or ~/wwwroot/index.html for Blazor WebAssembly app.
[_Host.cshtml/_Layout.cshtml/index.html]
<head>
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?key=&callback=initMap"></script>
</head> [Script.js]
function initialize() {
var latlng = new google.maps.LatLng(40.716948, -74.003563);
var options = {
zoom: 14, center: latlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("map"), options);
} [index.razor]
@page "/"
@inject IJSRuntime JSRuntime
<h1>Display Google Map</h1>
<div id="map" style="height:500px;width:100%;">
</div>
@code {
protected override async Task OnAfterRenderAsync ( bool firstRender )
{
if (firstRender)
{
await JSRuntime.InvokeVoidAsync("initialize", null);
}
}
}In the above example, Google Maps is initialized in the OnAfterRenderAsync life cycle method. By invoking it using a JavaScript interop, this will initialize Google Map API when the page is rendered.
Note: If you’d like to know how to render Google Maps in Syncfusion Blazor Map, take a look at our documentation section.
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