I try these codes to add feature to a "momery" vectorlayer under Qgis 1.3.0 :
(Reference to http://wiki.qgis.org/qgiswiki/PythonBindings and change some command with different Qgis version)
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from PyQt4.QtCore import *
from PyQt4.QtGui import *
v01=QgsVectorLayer("Point","KSJ","memory")
pr=v01.dataProvider()
pr.addAttributes({"name":"string"})
pr.addAttributes({"ageee":"int"})
pr.addAttributes({"size":"double"})
feature=QgsFeature()
feature.setGeometry(QgsGeometry.fromPoint(QgsPoint(10,10)))
feature.setAttributeMap( { 0 : QVariant("Johny"), 1 : QVariant(20), 2:QVariant(0.3) } )
pr.addFeatures( [ feature ] )
v01.updateExtents()
QgsMapLayerRegistry.instance().addMapLayer(v01)
It can be done but - dataprovider has no field showing(included field "id")
But I can use codes like:
- Code: Select all
iface.activeLayer().dataProvider().nextFeature(QGSFEATURE)
QGSFEATURE.attributeMap()[0].toString()
to get its value. That means it really has,but doesn't show, right?
I think there must be some problems with my conception.
could anyone help me? Thanks a lot.
KSJ
