${REST_ThemeGraduatedSymbol_Title}
${REST_ThemeGraduatedSymbol_Description}
//点击生成专题图触发事件
private async void commit_Click(object sender, RoutedEventArgs e)
{
ThemeGraduatedSymbol themeGraduatedSymbol = new ThemeGraduatedSymbol
{
BaseValue = 1128139680,
GraduatedMode = GraduatedMode.SQUAREROOT,
Flow = new ThemeFlow
{
FlowEnabled = true,
},
Expression = "Pop_1994",
Style = new ThemeGraduatedSymbolStyle
{
PositiveStyle = new ServerStyle
{
LineColor = Colors.White,
MarkerSize = 20,
MarkerSymbolID = 5
}
}
};
//专题图参数设置
ThemeParameters themeGraduatedSymbolParams = new ThemeParameters
{
//数据集名称
DatasetName = "Countries",
//数据源名称
DataSourceName = "World",
Themes = new List<Theme> { themeGraduatedSymbol }
};
//与服务器交互
try
{
ThemeService themeGraduatedSymbolService = new ThemeService(url);
var result = await themeGraduatedSymbolService.ProcessAsync(themeGraduatedSymbolParams);
//显示专题图。专题图在服务端为一个资源，每个资源都有一个 ID 号和一个 url
//要显示专题图即将资源结果的 ID 号赋值给图层的 layersID 属性即可
themeLayer.LayersID = result.ResourceInfo.NewResourceID;
if (!this.MyMap.Layers.Contains(themeLayer))
{
//加载专题图图层
this.MyMap.Layers.Add(themeLayer);
}
if (!themeLayer.IsVisible)
{
themeLayer.IsVisible = true;
}
}
//与服务器交互失败
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
internal static string ToJson(ThemeGraduatedSymbol graduatedSymbolTheme)
{
string json = "{";
List<string> list = new List<string>();
list.Add(string.Format("\"baseValue\":{0}", graduatedSymbolTheme.BaseValue.ToString()));
if (!string.IsNullOrEmpty(graduatedSymbolTheme.Expression))
{
list.Add(string.Format("\"expression\":\"{0}\"", graduatedSymbolTheme.Expression));
}
else
{
list.Add("\"expression\":\"\"");
}
list.Add(string.Format("\"graduatedMode\":\"{0}\"", graduatedSymbolTheme.GraduatedMode.ToString()));
if (graduatedSymbolTheme.Offset != null)
{
list.Add(ThemeOffset.ToJson(graduatedSymbolTheme.Offset));
}
else
{
list.Add("\"offsetX\":\"\"");
list.Add("\"offsetY\":\"\"");
}
if (graduatedSymbolTheme.Style != null)
{
list.Add(ThemeGraduatedSymbolStyle.ToJson(graduatedSymbolTheme.Style));
}
else
{
list.Add(string.Format("\"positiveStyle\":{0}", ServerStyle.ToJson(new ServerStyle())));
list.Add(string.Format("\"negativeStyle\":{0}", ServerStyle.ToJson(new ServerStyle())));
list.Add(string.Format("\"zeroStyle\":{0}", ServerStyle.ToJson(new ServerStyle())));
}
if (graduatedSymbolTheme.Flow != null)
{
list.Add(ThemeFlow.ToJson(graduatedSymbolTheme.Flow));
}
else
{
list.Add(string.Format("\"leaderLineStyle\":{0}", ServerStyle.ToJson(new ServerStyle())));
}
if (graduatedSymbolTheme.MemoryData != null)
{
list.Add("\"memoryData\":" + graduatedSymbolTheme.ToJson(graduatedSymbolTheme.MemoryData));
}
else
{
list.Add("\"memoryData\":null");
}
list.Add("\"type\":\"GRADUATEDSYMBOL\"");
json += string.Join(",", list.ToArray());
json += "}";
return json;
}
internal static ThemeGraduatedSymbol FromJson(JsonObject json)
{
if (json == null) return null;
ThemeGraduatedSymbol graduatedSymbol = new ThemeGraduatedSymbol();
graduatedSymbol.BaseValue = json["baseValue"].GetNumberEx();
graduatedSymbol.Expression = json["expression"].GetStringEx();
graduatedSymbol.Flow = ThemeFlow.FromJson(json);
if (json["graduatedMode"].ValueType != JsonValueType.Null)
{
graduatedSymbol.GraduatedMode = (GraduatedMode)Enum.Parse(typeof(GraduatedMode), json["graduatedMode"].GetStringEx(), true);
}
else
{
//这里不处理为空时的情况
}
graduatedSymbol.Offset = ThemeOffset.FromJson(json);
graduatedSymbol.Style = ThemeGraduatedSymbolStyle.FromJson(json.GetObject());
return graduatedSymbol;
}