/// <summary>
/// 在内存中创建新要素类，根据查询条件复制要素到新要素类，返回新要素类
/// </summary>
/// <param name="sourceClass">要素类</param>
/// <param name="whereClause">筛选条件，值为null或Empty时将复制全部要素</param>
/// <param name="memoryClassName">内存要素类的名称</param>
/// <returns></returns>
public static IFeatureClass CopyDataToNewMemory(this IFeatureClass sourceClass, string whereClause, string memoryClassName = "tempFeatureClass")
{
var fields = sourceClass.CloneFeatureClassFields();
var memoryClass = CreateInMemory(memoryClassName, fields);
sourceClass.QueryFeatures(whereClause, feature =>
{
IFeature memoryFeature = memoryClass.CreateFeature();
memoryFeature.Shape = feature.ShapeCopy;
for (int i = 0; i < memoryClass.Fields.FieldCount; i++)
{
memoryFeature.set_Value(i, feature.get_Value(i));
}
memoryFeature.Store();
});
return(memoryClass);
}
/// <summary>
/// 在内存中创建新要素类，根据查询条件复制要素到新要素类，返回新要素类
/// </summary>
/// <param name="sourceClass">要素类</param>
/// <param name="whereClause">筛选条件，值为null或Empty时将复制全部要素</param>
/// <param name="memoryClassName">内存要素类的名称</param>
/// <returns></returns>
public static IFeatureClass CopyDataToNewMemory(this IFeatureClass sourceClass, string whereClause, string memoryClassName = "tempFeatureClass")
{
IFields fields = sourceClass.CloneFeatureClassFields();
IFeatureClass memoryClass = CreateInMemory(memoryClassName, fields);
IQueryFilter filter = new QueryFilterClass();
filter.WhereClause = whereClause;
IFeatureCursor cursor = sourceClass.Search(filter, false);
IFeature feature;
while ((feature = cursor.NextFeature()) != null)
{
IFeature tmpFeature = memoryClass.CreateFeature();
tmpFeature.Shape = feature.ShapeCopy;
tmpFeature.Store();
}
return(memoryClass);
}