如何在Openlayers 3中创建KML时保持Polygon的样式？

Question

当我将功能写入KML时。它不包括功能样式。要求openlayers similiar question 2.我想要openlayers的代码3.以下是将功能写入kml文件的代码

class Program
{
    static void Main(string[] args)
    {
        DiceRoll DR = new DiceRoll();
        DR.SecondRolledDice();
    }
}  

public int RolledDice()
    {
        Random numberGenerator;
        numberGenerator = new Random();
        int firstdiceroll = numberGenerator.Next(1, 7);

        return firstdiceroll;
    }        

    public void SecondRolledDice()
    {
        Random SecondnumberGenerator;
        SecondnumberGenerator = new Random();
        int seconddiceroll = SecondnumberGenerator.Next(1, 7);

        DiceRoll DR = new DiceRoll();
        var diceroll = DR.RolledDice();

        string NumberName;
        string NumberNameTwo;
        string sum;
        string[] SecondNumberNames;
        SecondNumberNames = new string[12] { "One", "Two", "Three", "Four", "Five", "Six", "seven", "eight", "Nine", "ten", "eleven", "twelve"};

        NumberName = SecondNumberNames[seconddiceroll - 1];
        NumberNameTwo = SecondNumberNames[diceroll - 1];
        sum = SecondNumberNames[(diceroll + seconddiceroll) - 1];

        Console.WriteLine("{0} Plus {1} Equals {2} ", NumberName, NumberNameTwo, sum);         
    }  

Answer 1

您只需将样式对象添加到ol.format.KML（）;

即可

var source = new ol.source.Vector({
    url: 'city.kml',
    format: new ol.format.KML({
        projection: 'EPSG:3857',
        extractStyles: false
    })
});

function styleFunction(feature) {
    var style = new ol.style.Style({
        stroke: new ol.style.Stroke({
        color: 'red',
        width: 4
        })
    })
    return [style];
}

var layer = new ol.layer.Vector({
    source: source,
    style: styleFunction
});
map.addLayer(layer);