RSeleniumは指定されたパラメータを持つ要素を見つけることができません

Question

私はRSeleniumを使用して、マネージャに関する情報を持つデータフレームを構築しています。私はドロップダウンリストで要素を選択する問題があります。

Selenium message:no such element: Unable to locate element: {"method":"xpath","selector":"//*[@id="ddlMunicipio"]"} 
    (Session info: chrome=58.0.3029.110) 
    (Driver info: chromedriver=2.27.440174 (e97a722caafc2d3a8b807ee115bfb307f7d2cfd9),platform=Windows NT 10.0.14393 x86_64) (WARNING: The server did not provide any stacktrace information) 
Command duration or timeout: 140 milliseconds 
For documentation on this error, please visit: http://seleniumhq.org/exceptions/no_such_element.html 
Build info: version: '3.2.0', revision: '8c03df6', time: '2017-03-02 09:34:51 -0800' 
System info: host: 'PATY-FRAN', ip: '192.168.0.20', os.name: 'Windows 10', os.arch: 'x86', os.version: '10.0', java.version: '1.8.0_121' 
Driver info: org.openqa.selenium.chrome.ChromeDriver 
Capabilities [{applicationCacheEnabled=false, rotatable=false, mobileEmulationEnabled=false, networkConnectionEnabled=false, chrome={chromedriverVersion=2.27.440174 (e97a722caafc2d3a8b807ee115bfb307f7d2cfd9), userDataDir=C:\Users\victor\AppData\Local\Temp\scoped_dir6076_6551}, takesHeapSnapshot=true, pageLoadStrategy=normal, databaseEnabled=false, handlesAlerts=true, hasTouchScreen=false, version=58.0.3029.110, platform=XP, browserConnectionEnabled=false, nativeEvents=true, acceptSslCerts=true, locationContextEnabled=true, webStorageEnabled=true, browserName=chrome, takesScreenshot=true, javascriptEnabled=true, cssSelectorsEnabled=true, unexpectedAlertBehaviour=}] 
Session ID: 0815f4f9dcca9d364a7c15b4a50352e7 
*** Element info: {Using=xpath, value=//*[@id="ddlMunicipio"]} 

Error: Summary: NoSuchElement 
    Detail: An element could not be located on the page using the given search parameters. 
    class: org.openqa.selenium.NoSuchElementException 
    Further Details: run errorDetails method 

私はあなたの助けを借りて感謝するでしょう：私は次のエラーを取得し、最後の行で

> require(RSelenium) 
> remDr<-remoteDriver(browserName = "chrome") 
> remDr$open() 
> enlace<-'https://www.sisben.gov.co/atencion-al-ciudadano/Paginas/Directorio-administradores.aspx' 
> remDr$navigate(enlace) 
> remDr$findElement(using = "xpath", '//*[@id="ddlDepartamento"]/option[2]')$clickElement() 

：

私のコードは次のようです。

Answer 1

コンテンツはiframeにあります。最初にiframeに切り替える必要があります。

library(RSelenium) 
rD<-rsDriver() 
remDr <- rD$client 
enlace<-'https://www.sisben.gov.co/atencion-al-ciudadano/Paginas/Directorio-administradores.aspx' 
remDr$navigate(enlace) 
# content is in iframe 
frames <- remDr$findElements("css", "iframe") 
# switch to first iframe 
remDr$switchToFrame(frames[[1]]) 
selectElem <- remDr$findElement("id", "ddlDepartamento") 
selectOpt <- selectElem$selectTag() 
> selectOpt$text 
[1] "AMAZONAS"   "ANTIOQUIA"   "ARAUCA"    "ATLANTICO"   
[5] "BOGOTÁ D.C."  "BOLIVAR"   "BOYACA"    "CALDAS"    
[9] "CAQUETA"   "CASANARE"   "CAUCA"    "CESAR"    
[13] "CHOCO"    "CORDOBA"   "CUNDINAMARCA"  "GUAINIA"   
[17] "GUAJIRA"   "GUAVIARE"   "HUILA"    "MAGDALENA"   
[21] "META"    "NARIÑO"    "NORTE DE SANTANDER" "PUTUMAYO"   
[25] "QUINDIO"   "RISARALDA"   "SAN ANDRES"   "SANTANDER"   
[29] "SUCRE"    "TOLIMA"    "VALLE"    "VAUPES"    
[33] "VICHADA" 

# click 2nd one 
selectOpt$elements[[2]]$clickElement() 

.... 
.... 
rm(rD) 
gc()