ArcGIS Engine symbolic

Previously, the running process of the system's symbolic functions has not been clearly organized. Now, the main process is summarized as follows. The details are not described below:

The symbolic function mainly applies two interfaces: simple symbolic isimplerenderer and unique value symbolic iuniquevaluerenderer.

Two related points of the default Symbol: after obtaining the map layer with igeofeaturelayer, the symbol under the render of the igeofeaturelayer is the original symbol by default, while the defaultsymbol of the iuniquevaluerenderer needs to be customized.

Dim puniquevaluerenderer as iuniquevaluerenderer

Dim pgeofeaturelayer as igeofeaturelayer

......

Pgeofeaturelayer. Renderer = puniquevaluerenderer

The above Code assigns the defined iuniquevaluerenderer object to the geographical feature layer object, and the coloring tool of this geographical feature layer is defined. During symbolic execution, you only need to retrieve the coloring tool from the geographical feature layer object:

Puniquevaluerenderer = pgeofeaturelayer. Renderer