ArcEngine调用Geoprocessor工具SelectLayerByAttribute选择面积小于500的图斑，可以正常运行
Geoprocessor GP = new Geoprocessor();
g.OverwriteOutput = true;
SelectLayerByAttribute SelectByAttribute = new SelectLayerByAttribute();
ILayer featureLayer = axMapControl1.get_Layer(0);
SelectByAttribute.in_layer_or_view = featureLayer;
SelectByAttribute.selection_type = "NEW_SELECTION";
SelectByAttribute.where_clause = "AREA <500";
g.Execute(SelectByAttribute,null);
选择图斑之后，调用Eliminate消除图斑
String output = @"C:\Users\zc\Documents\ArcGIS\Default.gdb\soils_Eliminate4";
Eliminate eliminate = new Eliminate();
eliminate.in_features = featureLayer;
eliminate.out_feature_class = output;
g.Execute(eliminate, null);
出现错误，错误提示
Message "对 COM 组件的调用返回了错误 HRESULT E_FAIL。"
StackTrace " 在 ESRI.ArcGIS.Geoprocessing.GeoProcessorClass.Execute(String Name, IVariantArray ipValues, ITrackCancel pTrackCancel)
在 ESRI.ArcGIS.Geoprocessor.Geoprocessor.ExecuteInner(IGPProcess process, ITrackCancel trackCancel, IGeoProcessor igp, IVariantArray iva)
在 ESRI.ArcGIS.Geoprocessor.Geoprocessor.Execute(IGPProcess process, ITrackCancel trackCancel)
在 stretch.Form1.button2_Click(Object sender, EventArgs e) 位置 D:\stretch\stretch\Form1.cs:行号 94"
网上关于这方面的资料很少，应该是eliminate的参数有错误，arcengine帮助文档给的参数类型是“object”，不清楚到底是什么类型的参数，有做过这方面的前辈指点一下吗？
