ArcObject10.2 要素类添加投影

利用ArcObject实现 ArcMap Toolbox的 Define Projection工具

实现代码如下：

        /// <summary>
        /// 用于未知空间参考坐标系的数据集赋予空间参考坐标系，且会覆盖已存在的空间参考系
        /// </summary>
        /// <param name="geoDataset"></param>
        /// <param name="spatialReference"></param>
        /// <param name="isSucceed"></param>
        public void DefineProjection(
            IGeoDataset geoDataset,
            ISpatialReference spatialReference,
            out bool isSucceed)
        {
            isSucceed = false;
            IGeoDatasetSchemaEdit geoDatasetSchemaEidt = geoDataset as IGeoDatasetSchemaEdit;
            if (geoDatasetSchemaEidt.CanAlterSpatialReference == true)
            {
                geoDatasetSchemaEidt.AlterSpatialReference(spatialReference);
                isSucceed = true;
            }
        }