C#使用OpenFileDialog选择打开一个要素类文件,并将要素类保存在FeatureClass中,生成在要素范围之外的均匀分布的随机点
时间: 2024-03-23 14:41:19 浏览: 54
好的,跟你之前提到的问题类似,我们可以使用C#中的OpenFileDialog组件来选择要素类文件,然后使用ArcObjects来生成在要素范围之外的均匀分布的随机点。具体实现步骤如下:
1. 使用`OpenFileDialog`组件选择要素类文件。
```csharp
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.Filter = "Shapefile (*.shp)|*.shp";
if (openFileDialog.ShowDialog() == DialogResult.OK)
{
string shapefilePath = openFileDialog.FileName;
// 在这里将要素类保存在FeatureClass中
}
```
2. 使用`WorkspaceFactory`打开文件所在的工作空间,并获取要素类。
```csharp
// 打开工作空间
IWorkspaceFactory workspaceFactory = new ShapefileWorkspaceFactory();
IWorkspace workspace = workspaceFactory.OpenFromFile(System.IO.Path.GetDirectoryName(shapefilePath), 0);
// 获取要素类
IFeatureWorkspace featureWorkspace = workspace as IFeatureWorkspace;
IFeatureClass featureClass = featureWorkspace.OpenFeatureClass(System.IO.Path.GetFileNameWithoutExtension(shapefilePath));
```
3. 获取要素的外包矩形范围。
```csharp
// 获取要素范围
IFeature feature = featureClass.GetFeature(0); // 假设选择第一个要素
IGeometry geometry = feature.Shape;
IEnvelope envelope = geometry.Envelope;
```
4. 生成随机点,并使用`IPoint`接口来表示点。
```csharp
// 生成随机点
Random random = new Random();
double x = envelope.XMin + (envelope.XMax - envelope.XMin) * random.NextDouble();
double y = envelope.YMin + (envelope.YMax - envelope.YMin) * random.NextDouble();
IPoint point = new PointClass();
point.PutCoords(x, y);
```
5. 检查点是否在要素内,如果在,则重新生成随机点。
```csharp
// 检查点是否在要素内
while (geometry.Contains(point) || geometry.Disjoint(point))
{
x = envelope.XMin + (envelope.XMax - envelope.XMin) * random.NextDouble();
y = envelope.YMin + (envelope.YMax - envelope.YMin) * random.NextDouble();
point.PutCoords(x, y);
}
```
6. 将点保存到要素类中。
```csharp
// 将点保存到要素类中
IFeatureBuffer featureBuffer = featureClass.CreateFeatureBuffer();
featureBuffer.Shape = point;
IFeatureCursor featureCursor = featureClass.Insert(true);
featureCursor.InsertFeature(featureBuffer);
featureCursor.Flush();
```
以上就是将要素类保存在FeatureClass中,以及生成在要素范围之外的均匀分布的随机点的步骤了。希望能对你有所帮助。
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