1、 查询实现
/// <summary>
/// 获得Feature
/// </summary>
/// <param name="pLineLayer"></param>
/// <param name="FID"></param>
/// <returns></returns>
private IFeature GetFeatureByFID(IFeatureClass pFeatureClass, int FID)
{
IQueryFilter pQueryFilter = new QueryFilterClass();
pQueryFilter.WhereClause =pFeatureClass.OIDFieldName+ "=" + FID;
IFeatureCursor pFeatureCursor = pFeatureClass.Search(pQueryFilter, true);
try
{
return pFeatureCursor.NextFeature();
}
finally
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(pFeatureCursor);
System.Runtime.InteropServices.Marshal.ReleaseComObject(pQueryFilter);
}
}
2、 直接使用GetFeature
PFeatureClass.GetFeature(10);
3、 比较两者速度一样，方法二简单，方法一灵活，可以方便改为其他使用
4、 多个ID使用
public void IFeatureClass__GetFeatures(IFeatureClass featureClass, string nameOfField)
{
//get the index of the field we are interested in
int fieldIndexValue = featureClass.FindField(nameOfField);
System.Collections.Generic.List<int> constructoidList = new System.Collections.Generic.List<int>();
constructoidList.Add(1);
constructoidList.Add(2);
constructoidList.Add(3);
constructoidList.Add(4);
constructoidList.Add(10);
int[] oidList = constructoidList.ToArray();
IFeatureCursor featureCursor = featureClass.GetFeatures(oidList, false);
IFeature feature = featureCursor.NextFeature();
// loop through the returned features and get the value for the field
while (feature != null)
{
//do something with each feature(ie update geometry or attribute)
Console.WriteLine("The {0} field contains a value of {1}", nameOfField, feature.get_Value(fieldIndexValue));
feature = featureCursor.NextFeature();
}
}