|
You are correct that my question formatting is messed up. Unfortunately, I do not see any way to edit my post.
You are correct in what I'm trying to do.
I can't create an instance of the child class as that is handled by the parent class's constructor. Even if I could I would still need to use reflection to determine the child class to create and to assign a value to its "value" property.
|
|
|
|
|
In the bottom right corn of any message you post, you can click on Edit while viewing it.
In that case, I would imagine that you have to pass the new child class to the same code you're already using to fill in the fields and call methods of the parent class. Though, this depends on your parent class' implementation of hosting the child class, if it's a poperty or just a public field. Kind of like recursion walking a directory tree.
|
|
|
|
|
HI - and Help !
I have a small working app that formats a request to Google Maps, an retireves the data.
I copied the code to access a USGS site - and the string works but the code hangs.
Here is the code
Sub GetElevationData()
'This is based upon GoogleMaps access code
'WebRequestString = "http://ws.geonames.org/gtopo30?lat=" & lineArray(LatPosition) & "&lng=" & lineArray(LonPosition) ' this is the eventual string . . . but I am using the following as a test - I can ctrl click and the link comes up ok with a 2 digit elevation.
Dim test1 As String = "http://ws.geonames.org/gtopo30?lat=33.7669399&lng=-116.4134417"
' documentation is available at http://www.geonames.org"
Dim Request As HttpWebRequest = CType(WebRequest.Create(test1), HttpWebRequest)
'Request.MaximumAutomaticRedirections = 5 Tried these (and lots other options - but no joy)
'Request.AllowAutoRedirect = True
Dim Response As HttpWebResponse = CType(Request.GetResponse(), HttpWebResponse)
'This seems to time out
Dim str As Stream = Response.GetResponseStream()
Dim inBuf(10000) As Byte
Dim bytesToRead As Integer = CInt(inBuf.Length)
Dim bytesRead As Integer = 0
While bytesToRead > 0
Dim n As Integer = str.Read(inBuf, bytesRead, bytesToRead)
If n = 0 Then
Exit While
End If
bytesRead += n
bytesToRead -= n
End While
MsgBox("bytesread " & bytesRead) 'says 4
'inBuf now has the elevation
'bytesRead has the string length
Dim elevationvalue As String = inBuf.ToString
MsgBox(elevationvalue) ' says system byte []
'lineArray(elevationPosition) = elevationvalue
Response.GetResponseStream().Dispose()
End Sub
Thanks
Bob
|
|
|
|
|
Just a couple of questions off the top of my head... Hangs where?? Which line?? Does it hang for a time, then resume?? Does it hang indefinately?? What's the size of the file it's trying to retrieve?? Is there network activity during the hang??
|
|
|
|
|
HI - and thanks for the reply If you want to chat about this - call me at 510 889 1453
I Posted this reply a bit early - and have found a small glitch
I have modified the code a bit - here is the most recent version using a directcast . . . The other version hung on the response statement - forever - and the network is basically empty during the hang
The reply is a 1-4 byte string. ---> Glitch - the directcast returns the entire web page string -
I found the following as an alternate suggestion - it works - but seems to time out on each request (my test file has 2 records, and the total time is about 12 seconds) - but if I un-comment the test1 string I get sub second response to a browser window.
My DevEnv is VisualStudio2008
WebRequestString = "http://ws.geonames.org/gtopo30?lat=" & lineArray(LatPosition) & "&lng=" & lineArray(LonPosition)
'Dim test1 As String = "http://www.geonames.org/gtopo30?lat=33.7669399&lng=-116.4134417"
Dim Request As HttpWebRequest
Dim Response As HttpWebResponse
Dim reader As StreamReader
Dim sbSource As StringBuilder
Try
Request = DirectCast(WebRequest.Create(WebRequestString), HttpWebRequest)
Request.KeepAlive = False
response = DirectCast(Request.GetResponse(), HttpWebResponse)
If Request.HaveResponse = True AndAlso Not (response Is Nothing) Then
' Get the response stream
reader = New StreamReader(response.GetResponseStream())
' Read it into a StringBuilder
sbSource = New StringBuilder(reader.ReadToEnd())
End If
Catch wex As WebException
' This exception will be raised if the server didn't return 200 - OK
' Try to retrieve more information about the network error
If Not wex.Response Is Nothing Then
Dim errorResponse As HttpWebResponse = Nothing
Try
errorResponse = DirectCast(wex.Response, HttpWebResponse)
MsgBox("The server returned '{0}' with the status code {1} ({2 })." & errorResponse.StatusDescription & " , " & errorResponse.StatusCode & " , " & errorResponse.StatusCode)
Finally
If Not errorResponse Is Nothing Then errorResponse.Close()
End Try
End If
Finally
If Not Response Is Nothing Then Response.Close()
End Try
elevationvalue = sbSource.ToString
modified on Wednesday, February 25, 2009 10:31 AM
|
|
|
|
|
|
I'm very sorry. You seem to have confused CodeProject.com with RentACoder.com
|
|
|
|
|
You have got to be one of the most clueless people here, and that is really saying something. First you create an article to ask a question, then you repeat that ie another article and now you are asking for a rentacoder.
Can you find the link for rentacoder or do you need help with that too!
Never underestimate the power of human stupidity
RAH
|
|
|
|
|
How to place the text at cursor position in vb.net textbox
|
|
|
|
|
Look into the TextBox's SelectionStart property.
|
|
|
|
|
|
Hello my name is Jordan
MY problem if how can I save my playlist even If I shutdown the computer?
my sample code is :
'this sub is used to add url type playlist in the playlistbox
Private Sub FileOpener_FileOk(ByVal sender As System.Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles FileOpener.FileOk
'filenames is used because we want to get the path or url address of file choosen
'in order to play the choosen file by th visual player
For Each track As String In FileOpener.FileNames
'add the file choosen to the playlist
PlaylistListUrlBox.Items.Add(track)
Next
'change the value of titleLabel in the file choosen open by safe file names
'safe file name means that it will only get the file name not the path of the file
TitleLabel.Text = FileOpener.SafeFileName
End Sub
The playlist I created is the address or location of the file choosen
Thanks and more power codeproject.com for the help
|
|
|
|
|
Handle the form's Closing event and write the data you need to save to a file from there.
|
|
|
|
|
Hi,
i have a function on in a module.
i also have a button on a sheet.
how do i trigger the function when i hit the "Enter" key on the keyboard.
i tried to record a macro but this doesn't work.
any ideas?
thanks in advance.
Anoop
|
|
|
|
|
The worksheet and workbook objects don't have a KeyDown or KeyPress event, so the only way to tell would be if the sheet is set to recalcuate itself (which it normally does by default) and you handle the Calculate event.
|
|
|
|
|
Hello, My name is Jordan
I am using vb 2008 express edition
if someone could help I am really thankful but if not guess I have to
make my self push to what I can't do
My problem is if
1. How can I make save ms access database by using vb 2008?
2. How can I link a data base file to display by using a file in the database also?
Thanks and more power codeporject.com
|
|
|
|
|
Neither of your questions make any sense. Since Access is entirely file-based, everything you do to it is automatically saved. There is no "saving an Access database by using...".
Also, I think you really need to pickup a beginners book on VB.NET and ADO.NET. "Link a database file to display by using a file..." doesn't make any sense at all.
|
|
|
|
|
Hi!! How to encrypt stored procedure without using with encryption caluse.
I can encrypt with with encryprion clause. But it can be easily decarypted.
|
|
|
|
|
That's where carefully considered and implemented security of the SQL server comes into play. No, you can't create your own encrypting scheme to do this.
|
|
|
|
|
Hi All,
While sending sms message using GSM Modem (in vb.net), I am receiving CMS ERROR: 301 (because of making call).
How to resolve it? and send sms continuously....?
Thanks in advance.
modified on Monday, February 23, 2009 6:22 AM
|
|
|
|
|
|
How to browse folder not file
|
|
|
|
|
Look at the system.io.directory namespace you have everything you need there
For GUI searching there is a control 'FolderBrowserDialog' located in the toolbox under the group 'Dialogs'
|
|
|
|
|
It's giving error at line FolderBrowserDialog.ShowDialog()
|
|
|
|
|
Since my telepathic skills are a bit off today:
What error?
How did you initialize the dialog window?
How did you declare the dialog window?
Did you add the control in designer or in code?
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
