//added by chulili
//函数功能：根据xml配置文件为图层设置符号(xml配置文件暂时采用指定全路径)
//输入参数：图层 日志文件 输出参数：无
public static void SetRenderByXML(ILayer pLayer, LogFile Log)
{
string serverstylename; //符号库名称
XmlDocument xmldoc = new XmlDocument();
string strCurFile = Application.StartupPath + "\\..\\Template\\Render.xml";
//查找配置文件中关于该图层信息
string strSearchExp = "//GisLayer [@ItemName='" + pLayer.Name + "']";
XmlNode xmlRenderNode;
if (File.Exists(strCurFile) == false)
{
if (Log != null)
{
Log.Writelog("符号配置文件不存在");
}
return;
}
if (Log != null)
{
Log.Writelog("加载符号配置文件");
}
//读取xml配置文件
xmldoc.Load(strCurFile);
xmlRenderNode = xmldoc.SelectSingleNode(strSearchExp);
if (xmlRenderNode == null)
{
if (Log != null)
{
Log.Writelog("符号配置文件中不存在图层节点");
}
return;
}
if (Log != null)
{
Log.Writelog("读取符号配置文件信息");
}
XmlElement xmlElent = (XmlElement)xmlRenderNode;
string strStyle, ColName, defaultname, defaultLab;
//读取图层节点属性值
strStyle = xmlElent.GetAttribute("sTyle");
ColName = xmlElent.GetAttribute("ColName"); //符号化依据的字段名称
defaultname = xmlElent.GetAttribute("DefaultSymbol"); //默认符号
defaultLab = xmlElent.GetAttribute("DefaultLabel"); //默认符号的标签
IFeatureLayer pFLayer = pLayer as IFeatureLayer;
IFeatureClass fcls = pFLayer.FeatureClass;
IUniqueValueRenderer ptmpRender;
ptmpRender = new UniqueValueRendererClass();
//固定按照一个字段进行符号化，设置符号化字段
ptmpRender.FieldCount = 1;
ptmpRender.set_Field(0, ColName);
ptmpRender.RemoveAllValues();
//读取符号库（暂时使用固定的符号库，以后应该可配置）
string stylefileFullname = Application.StartupPath + @"\..\Styles\testStyle.ServerStyle";
string colvalue, symbolname, labelname;
if (Log != null)
{
Log.Writelog("读取符号库,为图层设置符号");
}
foreach (XmlNode xmlchild in xmlRenderNode.ChildNodes)//根据xml构造每个symbol
{
if (xmlchild.NodeType.ToString().Equals("Element"))
{
//读取符号节点的属性
xmlElent = (XmlElement)xmlchild;
colvalue = xmlElent.GetAttribute("ColValue"); //字段值
symbolname = xmlElent.GetAttribute("Symbol"); //符号名
labelname = xmlElent.GetAttribute("Label"); //符号标签
//根据符号库全路径，符号类别，符号名获取符号
ISymbol pSymbol = GetSymbol(stylefileFullname, strStyle, symbolname);
//添加符号
ptmpRender.AddValue(colvalue, "", pSymbol);
//设置符号标签
ptmpRender.set_Label(colvalue, labelname);
}
}
//设置默认符号（即地物的字段值不满足其他渲染条件的情况下，地物采用的符号）
ISymbol pDefaultSym = GetSymbol(stylefileFullname, strStyle, defaultname);
ptmpRender.DefaultSymbol = pDefaultSym;
ptmpRender.DefaultLabel = defaultLab;
if (ptmpRender.DefaultSymbol != null)
{
ptmpRender.UseDefaultSymbol = true;
}
(pFLayer as IGeoFeatureLayer).Renderer = ptmpRender as IFeatureRenderer;
if (Log != null)
{
Log.Writelog("图层符号配置完成");
}
}
