利用gp自己做的生成缓冲区的代码

主要部分代码，参数来源略

            Geoprocessor gp = new Geoprocessor();
            gp.OverwriteOutput = true;
            ESRI.ArcGIS.AnalysisTools.Buffer pbuffer = new ESRI.ArcGIS.AnalysisTools.Buffer();
            pbuffer.in_features = pFeLayer;
            pbuffer.buffer_distance_or_field = Convert.ToString((this.textBox1.Text)) + " " + (string)this.comboBox2.Text;
            pbuffer.out_feature_class = this.textBox2.Text;
            gp.Execute(pbuffer, null);
            IFeatureLayer pFeatureLayer = new FeatureLayerClass();
            IWorkspaceFactory pWsF = new ShapefileWorkspaceFactoryClass();
            IFeatureWorkspace pFWs = (IFeatureWorkspace)pWsF.OpenFromFile(FilePath, 0);
            IFeatureClass pFeatureClass = pFWs.OpenFeatureClass(FileName);
            pFeatureLayer.FeatureClass = pFeatureClass;
            pFeatureLayer.Name = pFeatureClass.AliasName;
            prmForm.axMapControl1.AddLayer(pFeatureLayer);
            MessageBox.Show("缓冲完毕", "提示");
            prmForm.axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewAll, null, null);