Aragis Engine 二次开发中，如何根据符号库文件 设置图层样式

设置图层样式时，可传入参数设置图层样式，可直接调用该方法。

/// <summary>
/// 根据符号库文件，设置图层样式
/// </summary>
/// <param name="sServerStylePath">ServerStyle的路径</param>
/// <param name="sGalleryClassName">样式中的类文件（如：Fill Symbols)</param>
/// <param name="pFieldName">匹配字段名</param>
/// <param name="pFeatureLayer">设置的图层</param>
private void SetSymbol(string sServerStylePath, string sGalleryClassName, string pFieldName, IFeatureLayer pFeatureLayer)
{
try
{
//ServerStyleGallery对象
IStyleGallery pStyleGaller = new ServerStyleGalleryClass();
IStyleGalleryStorage pStyleGalleryStorage = pStyleGaller as IStyleGalleryStorage;
IEnumStyleGalleryItem pEnumSyleGalleryItem = null;
IStyleGalleryItem pStyleGallerItem = null;
IStyleGalleryClass pStyleGalleryClass = null;
//创建UniqueValueRendererClass对象
IUniqueValueRenderer pUVRender = new UniqueValueRendererClass();
//使用IStyleGalleryStorage接口的AddFile方法加载ServerStyle文件
pStyleGalleryStorage.AddFile(sServerStylePath);
//遍历ServerGallery中的Class
for (int i = 0; i < pStyleGaller.ClassCount; i++)
{
pStyleGalleryClass = pStyleGaller.get_Class(i);
if (pStyleGalleryClass.Name != sGalleryClassName)
continue;
//获取EnumStyleGalleryItem对象
pEnumSyleGalleryItem = pStyleGaller.get_Items(sGalleryClassName, sServerStylePath, "");
pEnumSyleGalleryItem.Reset();
//遍历pEnumSyleGalleryItem
pStyleGallerItem = pEnumSyleGalleryItem.Next();
while (pStyleGallerItem != null)
{
//获取符号
ISymbol pSymbol = pStyleGallerItem.Item as ISymbol;
pUVRender.AddValue(pStyleGallerItem.Name, "", pSymbol);
pStyleGallerItem = pEnumSyleGalleryItem.Next();
}
//设置唯一值符号化的字段个数和字段名
pUVRender.FieldCount = 1;
pUVRender.set_Field(0, pFieldName);
IGeoFeatureLayer pGFeatureLyr = pFeatureLayer as IGeoFeatureLayer;
//设置IGeofeatureLayer的Renderer属性
pGFeatureLyr.Renderer = pUVRender as IFeatureRenderer;
}
System.Runtime.InteropServices.Marshal.ReleaseComObject(pEnumSyleGalleryItem);
System.Runtime.InteropServices.Marshal.ReleaseComObject(pStyleGalleryClass);
}
catch (Exception)
{
MessageBoxEx.Show("匹配字段符号失败！", "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}