ArcEngine高级复杂标注功能：多字段精准控制

  /// <summary>
        /// 标注
        /// </summary>
        /// <param name="pInputFeaturelayer"></param>
        /// <param name="strLabelExpression"></param>
        /// <param name="pFont"></param>
        /// <returns></returns>
        private static ILayer LabelFeatureLayer(IGeoFeatureLayer pInputFeaturelayer, string strTableName, string strFieldName)
        {
            if (pInputFeaturelayer == null || string.IsNullOrEmpty(strFieldName))
            {
                MessageBox.Show("标注失败！", "提示");
                return null;
            }
            try
            {
                //清空标注
                IAnnotateLayerPropertiesCollection pAnnoLayerPropsCollection = pInputFeaturelayer.AnnotationProperties;
                pAnnoLayerPropsCollection.Clear();

                //设置标注样式
                ITextSymbol pTextSymbol = new TextSymbolClass();
                pTextSymbol.Size = 9;
                IRgbColor pRGBColor = new RgbColor();
                pRGBColor.Red = 255;
                pRGBColor.Green = 0;
                pRGBColor.Blue = 0;
                pTextSymbol.Color = pRGBColor as IColor;