添加矢量数据（点）

// 将ILayer转换为IFeaturelayer，为了对图层上的要素进行编辑  

ILayer pLayer = GetGallery(ActiveGallery);

IFeatureLayer pFeatureLyr = pLayer as IFeatureLayer;     

// 定义一个要素集合，并获取图层的要素集合                

IFeatureClass pFeatCls = pFeatureLyr.FeatureClass;

// 定义一个实现添加要素的接口实例，并该实例作用于当前图层的要素集                       

IFeatureClassWrite fr = (IFeatureClassWrite)pFeatCls;

// 定义一个工作编辑工作空间，用于开启前图层的编辑状态                     

IWorkspaceEdit w = (pFeatCls as IDataset).Workspace as IWorkspaceEdit; 

IFeature f; 

// 开启编辑状态                                                              

w.StartEditing(true);                                                  

w.StartEditOperation();  

// 开启编辑操作                                                

//将IPoint设置为IFeature的shape属性时，需要通过中间接口IGeometry转换  

Geometry peo;

peo = ppt;

f = pFeatCls.CreateFeature();//实例化IFeature对象， 这样IFeature对象就具有当前图层上要素的字段信息  

f.Shape = peo;//设置IFeature对象的形状属性 

for (int i = 0; i < obj.fieldNameArray.Count; i++)

{

   int index = f.Fields.FindField(obj.fieldNameArray[i].ToString());

   if (index != -1)

   f.set_Value(i, obj.fieldValueArray[i]);//设置IFeature对象的索引是3的字段值 

}

f.Store();//保存IFeature对象  

fr.WriteFeature(f);//将IFeature对象，添加到当前图层上  

w.StopEditOperation();//停止编辑操作  

w.StopEditing(true);//关闭编辑状态，并保存修改