GP下CalculateField的用法

Posted 2022-03-16 yzhyingcool

以前用过这个类做字段计算，许久不用有些忘却，记录一下使用方式

   public static void CalculateField(IFeatureLayer featureLayer,IField field,string expression)
       
           Geoprocessor gp = new Geoprocessor OverwriteOutput = true ;

           CalculateField cal = new CalculateField()
          
               in_table =  featureLayer,
               field = field.Name,
               expression = expression,
               expression_type = "PYTHON_9.3"
           ;
           gp.Execute(cal, null);
       

调用时，如果expression为""，即空，需要这样使用："\"\""

例

CalculateField(pFeatureLayer,pFeatureLayer.FeatureClass.Fields.get_Field( pFeatureLayer.FeatureClass.FindField( item.SubItems[1].Text)), "\"\"");