Question

我的传单地图显示了GeoJSON文件中的多边形。此文件具有多个属性（attribute_1，attribute_2等）。但是，有些文字被填满，有些则是空的。

我怎样才能显示弹出窗口中填充文本的属性而不是空的属性？

在每个属性下方使用我的代码，如果它是空的＆＃34; null＆＃34;显示在弹出窗口中：

// Integrate GeoJSON and style polygons
  $.getJSON("klimagutachten_2001.geojson",function(klimagutachten){
    L.geoJson( klimagutachten, {
        style: function(feature){
            return {
                color: "#e60000",
                weight: 4,
                fillColor: "#e60000",
                fillOpacity: .3
            };
        },

// Call popup
        onEachFeature: function( feature, layer ){
            layer.bindPopup("<strong> Attribute 1: \"" + feature.properties.attribute_1 + " and the second attribute is: " + feature.properties.attribute_2)
        }                                                                                                       
    }).addTo(map);
  });

Answer 1

创建验证：

onEachFeature: function( feature, layer ){

var text = "";

if (!feature.properties.attribute_1) {
    text += feature.properties.attribute_1 +" "; 
}
if (!feature.properties.attribute_2) {
    text += feature.properties.attribute_2 +" "; 
}
layer.bindPopup(text);

}

Answer 2

我使用简单的if ... else语句解决了这个问题。添加内容以粗体突出显示：

// Integrate GeoJSON and style polygons
  $.getJSON("klimagutachten_2001.geojson",function(klimagutachten){
    L.geoJson( klimagutachten, {
        style: function(feature){
            return {
                color: "#e60000",
                weight: 4,
                fillColor: "#e60000",
                fillOpacity: .3
            };
        },

// Call popup
        onEachFeature: function( feature, layer ){
        var attribute_1 = feature.properties.attribute_1;
        if (attribute_1 == null) {
            attribute_1 = "";
        } else {
            var attribute_1 = feature.properties.attribute_1;
        };

            layer.bindPopup("<strong> Attribute 1: \"" + attribute_1 + " and the second attribute is: " + feature.properties.attribute_2)
        }   
    }).addTo(map);
  });

仅在传单弹出窗口中显示填充的属性（而不是＆＃34; null＆＃34; -attributes）

2 个答案: