C#+ArcEngine10.0+SP5实现鼠标移动动态显示要素属性信息

为了解决鼠标移过动态显示要素属性的问题，我在网上先是查到的只能显示单个要素的属性，就是直接在arcmap中设置好的那个tips就可以显示，但是这种显示效果只是简单的实现了显示要素的属性值，可是没有对该要素的描述。

为了在程序中实现这种效果，代码可写为：

 private void axMap_OnMouseMove(object sender, IMapControlEvents2_OnMouseMoveEvent e)
        {
            stFirst.Text = "   比例尺   1 : " + ((long)axMap.MapScale).ToString();
            stSecond.Text = "   当前坐标 X = " + e.mapX.ToString() + " Y = " + e.mapY.ToString() + "  " + axMap.MapUnits.ToString().Substring(4) + "    ";
            //显示属性
           ShowLayerTips(e.mapX, e.mapY);
           
        }
        private void ShowLayerTips(double x, double y)//显示地图tips方法
        {
            for (int i = 0; i < axMap.LayerCount; i++)
            {
                string fieldstring = "";
                ILayer layer = axMap.Map.get_Layer(i);
                axMap.ShowMapTips = true;
                IFeatureLayer fLayer = layer as IFeatureLayer;

                fLayer.ShowTips = true;
                ILayerFields layerFields = (ILayerFields)fLayer;
                for (int k = 0; k <= layerFields.FieldCount - 1; k++)
                {
                    IField field = layerFields.get_Field(k);
                    if (field.Name.ToLower() != "shape"&& !field.IsNullable)
                    {
                        fieldstring += """+field.AliasName+":"&"+"[" + field.Name + "]" + " & vbnewline & ";
                    }
                }
                IDisplayString displayString = fLayer as IDisplayString;
                IDisplayExpressionProperties properties = displayString.ExpressionProperties;             
                properties.Expression = fieldstring.Substring(0, fieldstring.Length - 14);
            }
        }

最终实现效果如下：