比如这段代码
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
using System.IO.Ports;
using System.Runtime.InteropServices;
using System.Threading;
using ESRI.ArcGIS.esriSystem;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.ADF;
using ESRI.ArcGIS.SystemUI;
using ESRI.ArcGIS.Geodatabase;
using ESRI.ArcGIS.DataSourcesFile;
using ESRI.ArcGIS.Geometry;
using ESRI.ArcGIS.Analyst3D;
using ESRI.ArcGIS.Display;
using ESRI.ArcGIS.GlobeCore;
namespace WindowsFormsApplication3
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
InitTimer();
text3DElement = new Text3DElementClass();
graphicsLayer = new GraphicsLayer3DClass();
Init3DText();
}
System.Windows.Forms.Timer Updatetimer;
IGraphicsLayer graphicsLayer;//将graphics图层定义为全局，就这么一个图层
IText3DElement text3DElement;//同上，将这个3delement也定义为全局
IGraphicsContainer3D graphicsContainer3D;//这个也是
int i = 0;
public void InitTimer()
{
Updatetimer = new System.Windows.Forms.Timer();
Updatetimer.Interval = 100;//定时器时间设为100ms，直观看到内存的增长。
Updatetimer.Tick += new EventHandler(Updatetimer_Tick);
}
public void Init3DText()
{
graphicsContainer3D = graphicsLayer as IGraphicsContainer3D;
text3DElement.FontName = "name";
text3DElement.Text = "开始";
text3DElement.AnchorPoint.X = 0;
text3DElement.AnchorPoint.Y = 0;
text3DElement.AnchorPoint.Z = 0;
text3DElement.Depth = 0.5;
text3DElement.Height = 2;
text3DElement.Height = 2;
text3DElement.BoldFont = true;
text3DElement.RotationAngle = 360;
ISimpleFillSymbol simpleFillSymbol = new SimpleFillSymbol();
IRgbColor color = new RgbColorClass();
color.Red = 255;
simpleFillSymbol.Color = color;
IFillShapeElement fillShapeElement = text3DElement as IFillShapeElement;
fillShapeElement.Symbol = simpleFillSymbol as IFillSymbol;
graphicsContainer3D.AddElement(text3DElement as IElement);
text3DElement.Update();//这里如果不添加update就显示不出来了。。。
this.axSceneControl1.Scene.AddLayer(graphicsLayer as ILayer);
this.axSceneControl1.SceneGraph.Invalidate(graphicsLayer, true, false);
this.axSceneControl1.SceneGraph.RefreshViewers();
}
int num = 0;
public void Updatetimer_Tick(object sender, EventArgs e)
{
i++;
string text = text3DElement.Text;
text = "是" + i;//还有这儿，如果我什么都不改，光update，当然是内存不变，就是说把这句删掉，不变
text3DElement.Text = text;//我就改了一下text涨这么厉害
text3DElement.Update();//内存飙升啊，就这句话
num = graphicsContainer3D.ElementCount;//这里看了下，graphicsContainer3D的确一直只有一个element存在
this.axSceneControl1.SceneGraph.Invalidate(graphicsLayer, true, false);
this.axSceneControl1.SceneGraph.RefreshViewers();
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