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Problem using webclient : (illegal characters in Path) error

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  1 year ago

  by kiran_beladiya

  Kiran Beladiya

  , India

  Joined 2 years ago

  I am facing problem while making web request by WebClient.
  I am making request to google map geocode apge to findout the longitude and latitude of particular address.
  Here is my code to do that :
  
  

  Dim QueryString As String

  Dim responseText As String = ""

  Dim WC As New Net.WebClient

  Dim SR As IO.StreamReader

   

  QueryString = "?q=" & getValidAddressString() & "&output=csv&key=" & ConfigurationManager.AppSettings("GeoCodeKey")

   

  Dim redirectURL As String = ConfigurationManager.AppSettings("GeoCodeURL") & QueryString

  SR = New IO.StreamReader(WC.OpenRead(redirectURL))

  responseText = SR.ReadToEnd()

  SR.Close()

   

  processResponseText(responseText)

  
  
  The strange thing is that for same address string, the code is working without any problem in one page. While the same code(have copy pasted) in another page is throwing the following error :

  Illegal characters in path.
  

  Exception Details: System.ArgumentException

  at System.Security.Permissions.FileIOPermission.HasIllegalCharacters(String[] str)
  at System.Security.Permissions.FileIOPermission.AddPathList(FileIOPermissionAccess access, AccessControlActions control, String[] pathListOrig, Boolean checkForDuplicates, Boolean needFullPath, Boolean copyPathList)
  at System.Security.Permissions.FileIOPermission..ctor(FileIOPermissionAccess access, String[] pathList, Boolean checkForDuplicates, Boolean needFullPath)
  at System.IO.Path.GetFullPath(String path)
  at System.Net.WebClient.GetUri(String path)
  at System.Net.WebClient.DownloadData(String address)
  at KG.GeoCodeHelper.Page_Load(Object sender, EventArgs e) in 
  

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