C sharp AE 获得图层中要素属性指并更新属性表
时间: 2023-06-11 20:08:50 浏览: 51
您可以使用 ArcObjects 来获取图层中要素的属性并更新属性表。下面是一些示例代码:
1. 获取要素属性:
```csharp
// Open the feature class
IFeatureClass featureClass = workspace.OpenFeatureClass("yourFeatureClassName");
// Create a query filter to select features
IQueryFilter queryFilter = new QueryFilter();
queryFilter.WhereClause = "yourWhereClause";
// Use a cursor to retrieve the features
IFeatureCursor featureCursor = featureClass.Search(queryFilter, false);
// Loop through the features and retrieve the attribute values
IFeature feature = featureCursor.NextFeature();
while (feature != null)
{
// Get the attribute values
object attributeValue = feature.get_Value(feature.Fields.FindField("yourFieldName"));
// Do something with the attribute value
feature = featureCursor.NextFeature();
}
// Clean up
System.Runtime.InteropServices.Marshal.ReleaseComObject(featureCursor);
```
2. 更新属性表:
```csharp
// Open the feature class
IFeatureClass featureClass = workspace.OpenFeatureClass("yourFeatureClassName");
// Create a query filter to select features
IQueryFilter queryFilter = new QueryFilter();
queryFilter.WhereClause = "yourWhereClause";
// Use a cursor to retrieve the features
IFeatureCursor featureCursor = featureClass.Update(queryFilter, false);
// Loop through the features and update the attribute values
IFeature feature = featureCursor.NextFeature();
while (feature != null)
{
// Set the new attribute value
feature.set_Value(feature.Fields.FindField("yourFieldName"), "yourNewValue");
// Update the feature
featureCursor.UpdateFeature(feature);
feature = featureCursor.NextFeature();
}
// Clean up
System.Runtime.InteropServices.Marshal.ReleaseComObject(featureCursor);
```
请注意,上述代码中的“workspace”可以是您的工作空间,例如,一个文件地理数据库或一个SDE连接。此外,您需要替换“yourFeatureClassName”和“yourFieldName”为实际的要素类和字段名称。最后,您需要提供一个有效的“where”子句来选择要处理的要素。