arcgis python 参数验证
arcgis python 参数验证
import arcpy
class ToolValidator(object):
"""Class for validating a tool's parameter values and controlling
the behavior of the tool's dialog."""
def __init__(self):
"""Setup arcpy and the list of tool parameters."""
self.params = arcpy.GetParameterInfo()
def initializeParameters(self):
"""Refine the properties of a tool's parameters. This method is
called when the tool is opened."""
return
def updateParameters(self):
"""Modify the values and properties of parameters before internal
validation is performed. This method is called whenever a parameter
has been changed."""
if self.params[0].value:
try:
desc = arcpy.Describe(self.params[0].value)
shapeType = desc.shapeType
sr = desc.spatialReference
gcsOrMercator = False if not sr.GCSName and sr.PCSName.upper().find("MERCATOR") == -1 else True
if shapeType.upper() == "POINT":
self.params[1].filter.list = ["POINT_X_Y_Z_M"]
elif shapeType.upper() == "MULTIPOINT":
self.params[1].filter.list = ["CENTROID", "PART_COUNT", "EXTENT"]
elif shapeType.upper() == "POLYLINE":
if desc.hasZ:
lineList = ["LENGTH", "LENGTH_GEODESIC", "LENGTH_3D", "LINE_START_MID_END", "CENTROID", "CENTROID_INSIDE", "PART_COUNT", "POINT_COUNT", "LINE_BEARING", "EXTENT"]
else:
lineList = ["LENGTH", "LENGTH_GEODESIC", "LINE_START_MID_END", "CENTROID", "CENTROID_INSIDE", "PART_COUNT", "POINT_COUNT", "LINE_BEARING", "EXTENT"]
self.params[1].filter.list = lineList
if gcsOrMercator:
lineList.remove("LENGTH")
if desc.hasZ:
lineList.remove("LENGTH_3D")
self.params[1].filter.list = lineList
elif shapeType.upper() == "POLYGON":
polyList = ["AREA", "AREA_GEODESIC", "PERIMETER_LENGTH", "PERIMETER_LENGTH_GEODESIC", "CENTROID", "CENTROID_INSIDE", "LINE_START_MID_END", "PART_COUNT", "POINT_COUNT", "EXTENT"]
self.params[1].filter.list = polyList
if gcsOrMercator:
polyList.remove("AREA")
polyList.remove("PERIMETER_LENGTH")
self.params[1].filter.list = polyList
if self.params[1].value:
self.params[5].parameterDependencies = [0]
self.params[5].schema.clone = True
newFields = []
propDict = {"POINT_X_Y_Z_M": ["POINT_X",
"POINT_Y",
"POINT_Z",
"POINT_M"],
"PART_COUNT": ["PART_COUNT"],
"CENTROID": ["CENTROID_X",
"CENTROID_Y",
"CENTROID_Z",
"CENTROID_M"],
"EXTENT": ["EXT_MIN_X",
"EXT_MIN_Y",
"EXT_MAX_X",
"EXT_MAX_Y"],
"POINT_COUNT": ["PNT_COUNT"],
"LINE_START_MID_END": ["START_X",
"START_Y",
"START_Z",
"START_M",
"MID_X",
"MID_Y",
"MID_Z",
"MID_M",
"END_X",
"END_Y",
"END_Z",
"END_M"],
"LINE_BEARING": ["BEARING"],
"CENTROID_INSIDE": ["INSIDE_X",
"INSIDE_Y",
"INSIDE_Z",
"INSIDE_M"],
"LENGTH": ["LENGTH"],
"PERIMETER_LENGTH": ["PERIMETER"],
"AREA": ["POLY_AREA"],
"LENGTH_GEODESIC": ["LENGTH_GEO"],
"AREA_GEODESIC": ["AREA_GEO"],
"LENGTH_3D": ["LENGTH_3D"],
"PERIMETER_LENGTH_GEODESIC":["PERIM_GEO"],
}
currentFields = [x.name for x in desc.fields]
for prop in str(self.params[1].value).split(";"):
try:
for field in propDict[prop]:
if not field in currentFields:
newField = arcpy.Field()
newField.type, newField.name = "DOUBLE", field
newFields.append(newField)
except:
pass
self.params[5].schema.additionalFields = newFields
except:
pass
return
def updateMessages(self):
"""Modify the messages created by internal validation for each tool
parameter. This method is called after internal validation."""
return
============================================================
class ToolValidator:
"""Class for validating a tool's parameter values and controlling
the behavior of the tool's dialog."""
def __init__(self):
"""Setup the Geoprocessor and the list of tool parameters."""
import arcpy
self.params = arcpy.GetParameterInfo()
def initializeParameters(self):
"""Refine the properties of a tool's parameters. This method is
called when the tool is opened."""
return
def updateParameters(self):
"""Modify the values and properties of parameters before internal
validation is performed. This method is called whenever a parmater
has been changed."""
import arcpy
if self.params[0].value:
mxd = arcpy.mapping.MapDocument(self.params[0].value.value)
#The following will display an error if mxd is not DDP enabled
testDDP = mxd.dataDrivenPages
#Generate unique list of layer names
lyrs = arcpy.mapping.ListLayers(mxd)
layerList = []
for lyr in lyrs:
layerList.append(lyr.name)
uniqueLayerList = list(set(layerList))
uniqueLayerList.sort()
if not self.params[1].altered:
self.params[1].filter.list = uniqueLayerList
#Generate unique list of field names
if self.params[1].altered:
selectedLayer = self.params[1].value
layerRef = arcpy.mapping.ListLayers(mxd, selectedLayer)[0]
fields = arcpy.ListFields(layerRef.dataSource)
fieldList = []
for field in fields:
fieldList.append(field.name)
uniqueFieldList = list(set(fieldList))
uniqueFieldList.sort()
self.params[2].filter.list = uniqueFieldList
#Generate unique list of page names
if self.params[2].altered:
fieldName = self.params[2].value
rows = arcpy.SearchCursor(layerRef.dataSource)
row = rows.next()
pageNameList = []
while row:
if row.getValue(fieldName) not in pageNameList:
pageNameList.append(row.getValue(fieldName))
row = rows.next()
pageNameList.sort()
self.params[3].filter.list = pageNameList
#Generate the printer list
printerList = arcpy.mapping.ListPrinterNames()
if not self.params[1].altered:
self.params[4].filter.list = printerList
return
def updateMessages(self):
"""Modify the messages created by internal validation for each tool
parameter. This method is called after internal validation."""
return
