IEnumFeature接口使用注意事项

            IActiveView pActiveView = axMapControl1.ActiveView;

            IMap pMap = axMapControl1.ActiveView.FocusMap;
            if (pMap.SelectionCount == 0) return;
            IEnumFeature pEnumFeature = pMap.FeatureSelection as IEnumFeature;
            IEnumFeatureSetup pEnumFeatureSetup = pEnumFeature as IEnumFeatureSetup;
            pEnumFeatureSetup.AllFields = true;
            IFeature pFeature = pEnumFeature.Next();

红色部分不可缺少，否则将导致读不出字段值。
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原文链接：https://blog.csdn.net/u010598851/article/details/40660371