Question

C#AE二次开发 从GeoDatabase数据库中添加矢量数据？

private void button2_Click(object sender, EventArgs e)
{

string Filename = "states";

//实例化工作空间工厂
IWorkspaceFactory pFact=new AccessWorkspaceFactoryClass();
//工作空间
IWorkspace pWorkspace = null;
//geodatabase全路径（含扩展名）
string PathStr = @"D:\二次开发实习\USA.mdb";
//打开geodatabase
pWorkspace = pFact.OpenFromFile(PathStr,0);

IFeatureLayer pFeatureLayer;
IFeatureWorkspace pFWorkspace;
//IGeoFeatureLayer pLayer;
ILayer pLayer;
pFWorkspace = pWorkspace as IFeatureWorkspace;

pFeatureLayer = new FeatureLayerClass();
pFeatureLayer.FeatureClass = pFWorkspace.OpenFeatureClass(Filename);
pFeatureLayer.Name = Filename;

pLayer = pFeatureLayer as ILayer;
axMapControl1.AddLayer(pLayer);

}
代码打开D:\二次开发实习\USA.mdb中的states图层，但是调试的时候总是出现错误如下图所示：

Answer 1

以前做过的添加图层的代码，你试试，可以寻找添加图层的，GeoDatabase数据库中的也可以，，
IGxDialog pgxdialog = default(IGxDialog);
IEnumGxObject pEnumGxobject = null;
IGxObjectFilter pFilter = default(IGxObjectFilter);
pFilter = new GxFilterFeatureDatasetsAndFeatureClasses();
pgxdialog = new GxDialog();
//***Dim pgxobject As IGxObject
pgxdialog.AllowMultiSelect = true;
pgxdialog.StartingLocation = "f:";
pgxdialog.Title = "select files for input";
pgxdialog.ButtonCaption = "OK";
pgxdialog.ObjectFilter = pFilter;
pgxdialog.DoModalOpen(0, pEnumGxobject);
if (pEnumGxobject == null)
return;

IGxDataset pGxObject = default(IGxDataset);

IFeatureLayer pFLayer = default(IFeatureLayer);
pFLayer = new FeatureLayer();
pGxObject = pEnumGxobject.Next;

if (pGxObject == null)
return;
while ((pGxObject != null)) {
//***If TypeOf pGxObject.Dataset Is IFeatureClass Then
pFLayer.FeatureClass = pGxObject.Dataset;
pFLayer.Name = pGxObject.Dataset.Name;
this.AxMapControl1.AddLayer(pFLayer);
pGxObject = pEnumGxobject.Next;
}

Answer 2

你的代码可以调试通过啊，我试了没问题，你再仔细检查下，看mdb文件存放位置和你的路径参数是不是相符