ArcEngine添加栅格后，不能闪烁问题
在做一个动画，也就是常说的闪烁吧，一开始的时候只是以矢量数据Shp为实验数据，添加闪烁后，倒是挺成功的
闪烁代码如下：
IPictureMarkerSymbol pPicsymbol = null;
pPicsymbol = new PictureMarkerSymbolClass();
string ThePath = System.IO.Path.GetDirectoryName(Application.ExecutablePath);
string filename = @"\SpatialAnalyst\小鹿.bmp";
filename = ThePath + filename;
pPicsymbol.CreateMarkerSymbolFromFile(esriIPictureType.esriIPictureBitmap, filename);
pPicsymbol.Size = 16;
ICursor Cursor;
pSelectionSet.Search(null, false, out Cursor);（我假设选择集已经存在了）
IFeatureCursor pfeatureCursor = Cursor as IFeatureCursor;
IFeature feature = pfeatureCursor.NextFeature();
while (feature != null)
{
map_control.FlashShape(feature.Shape, 3, 300, pPicsymbol as ISymbol);
feature = pfeatureCursor.NextFeature();
}
但是后来我添加栅格底图后，不晓得为什么，闪烁总是显示不了，在网上也查不到原因，偶尔的操作发现：只要在加载矢量之后再加载栅格就不会有问题，但我还是不知道原因，也许各位读者能给找到答案
代码如下：
private void addShpToolStripMenuItem_Click(object sender, EventArgs e)
{
OpenFileDialog openFileDialog1 = new OpenFileDialog();
openFileDialog1.Title = "选择Shp文件";
openFileDialog1.Filter = "ShapeFile (*.shp)|*.shp";
if (openFileDialog1.ShowDialog() == DialogResult.OK)//确定按的是“确定”键
{
string sFilePath = openFileDialog1.FileName;
if (sFilePath != null)
{
#region//将路径E:\AE\ESRI\dezhou\road.shp 改造成 E:\AE\ESRI\dezhou
// char[] sFilePathTrim = { '\\' };
// string[] Arraydir = sFilePath.Split(sFilePathTrim);
// string dir2 = null;
// for (int i = 0; i < Arraydir.Length - 1; i++)
// { dir2 += Arraydir[i] + '\\'; }
//dir2.TrimEnd(sFilePathTrim);
#endregion
bool hasloadedShp = false;
int index = sFilePath.LastIndexOf("\\");//这种方法相当的好
string dir2 = sFilePath.Substring(0, index);
string filename = openFileDialog1.SafeFileName.ToLower();
string filenameNoextnetion = filename.Substring(0,filename.LastIndexOf(".shp"));
for (int i = 0; i < map_control.LayerCount; i++)
{
ILayer layer= map_control.get_Layer(i);
if (filenameNoextnetion == layer.Name.ToLower())
{
MessageBox.Show("该图层已经存在！");
hasloadedShp = true;
break;
}
}
if (hasloadedShp==false)
map_control.AddShapeFile(dir2, openFileDialog1.SafeFileName);
}
checkMaptips();
}
}
private void checkMaptips()
{
bool hasRasterlyr = false;
for (int i = 0; i < map_control.LayerCount; i++)
{
ILayer layer = axMapControl1.get_Layer(i);
if (layer is IFeatureLayer)
{
IFeatureLayer featureLayer = (IFeatureLayer)layer;
ILayerFields fields = featureLayer as ILayerFields;
int indexfield = fields.FindField("LocalTime");
if (indexfield > 0)
{
// IField field = fields.get_Field(indexfield);
//featureLayer.DisplayField = field.Name;
featureLayer.DisplayField = "LocalTime";
layer.ShowTips = true;
}
}
else if (layer is IRasterLayer)
{
hasRasterlyr = true;
}
}
if (hasRasterlyr != true)
{
try
{
IWorkspaceFactory workspcFac = new RasterWorkspaceFactoryClass();
IRasterWorkspace rasterWorkspc;
IRasterDataset rasterDatst = new RasterDataset();
IRasterLayer rasterLay = new RasterLayer();
string applicationPath = System.IO.Path.GetDirectoryName(Application.ExecutablePath);
string filePath = @"\SpatialAnalyst";
filePath = applicationPath + filePath;
rasterWorkspc = workspcFac.OpenFromFile(filePath, 0) as IRasterWorkspace;
rasterDatst = rasterWorkspc.OpenRasterDataset("20110924.tif");
rasterLay.CreateFromDataset(rasterDatst);
//map_control.ClearLayers();
map_control.AddLayer(rasterLay, map_control.LayerCount);
map_control.ActiveView.Refresh();
}
catch (Exception ex)
{
MessageBox.Show(string.Format( "请确认存在名字叫'{0}'的栅格图层", "20110924.tif"));
map_control.ClearLayers();
axTOCControl1.Update();
map_control.ActiveView.Refresh();
}
}
axMapControl1.ShowMapTips = true;//只有在当前图层显示tips情况下，Map才会显示
}
作者： 风云
出处： http://www.cnblogs.com/fengyunlishi/
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