Whenever I try and get the InnerText of an element using an XmlDocument, it throws a NullReferenceException. Here is the code below:
Dim SetDoc As New XmlDocument
Dim xmlString As String = "<upload><links><bananas>apple</bananas><original>thirteen</original></links></upload>"
[Code].....
The same happens when I load exactly the same XML from file.
I have a project that I am working on which requires my datagridview to have certain columns set as readonly according to the user authentication results. But, almost every time I set readonly = true I get a nullreference exception.I have added ALL the datagridview events trying to see where I can handle this problem. The only event it calls into after I say readonly = "true" is my cell validation event. And that event always passes fine. It is after I hit f11 to continue past the "End Sub" of my validate event that I return to the calling code and all of the sudden have an exception too.
I've looked around and can't figure out how to debug this one so I am asking for help here. I have seen other bugs about scrolling content in columns and turning off scrollbars to fix random datagridview bugs but I dont know about this one. I can't find the same problem anywhere else yet.
-my admin timer elapses and I call a timeout routine which sets the grids back to readonly = true. One of my grids (one bound by datatable/bindingsource) almost always throws a nullreference when I set the readonly = true.
-when authenticating my user if their credentials pass I want to set the whole grid to readonly = false, and then individually set two columns to readonly = true so they cannot be modified while the rest of the grid is editable. I throw my nullreference here after my first individual column call to readonly = true.
I'm using multiple grids on my project, but the timeout nullreference exception seems to be tied directly to only one of my grids. In particular, this problem grid has the least complicated queries and barely any cell validation. I dont understand how it could be the cause of so much frustration. However, it seems that when changing readonly property on individual columns that both my main grids for my project will exhibit the same behaviors with the nullreference exception.
It's important to note that usually I can just drag the debugger back into the failure statement and it will actually succeed.By figuring this out I was able to set a flag if I wasn't able to change the status of the grid and recall it. Usually that fixes most things, but when it comes to doing the individual columns I cannot code my project to try/catch/recurse for each individual column.
I've got source and a test DB available if needed.I am not sure what is relevant out of my project to post? But I can offer some compensation via Paypal if someone on this board actually helps me fix my problem in a way that I can understand and troubleshoot for future projects. This is the last bit of functionality for my requirements and I have about 48 hours to get it bug free and working as designed or I will have to revert to some older spaghetti code and do a lot of this over.
I have created a very basic web service in vb.net using vs 2008. When I run the service within visual studio debugger, the service runs fine and gives me the expected results. When I deploy the service to the server and invoke it from a client, it always throws a NullReferenceException error when trying to access the data. More specifically when I call the DbConnection open() method within a dbhelper executeScalar method.
I'm using a custom dbhelper class I found on the web here: [URL] The only thing I've changed is the _factory at the top points to Providers.Odbc (since I'm using a ODBC connection). Like I said previously, the service (and the dbhelper class) work as expected within VS- it's only once I deploy it that it seems to bomb out. I've even tried hard coding the connection string in case it was having problems getting that but no difference there.
Ok the problem is with this Calc.DateLongToDateShort(tempxmlnodelist(j).Item(" _date").InnerText) < Date.Now Then If the innertext is a correct date, then the equation suceeds, however when the innerText is blank, which sometimes it will be, it throws exception cannot convert "" to Date. Now this makes sense of course. I am wondering if there is a "simple" way to avoid this error, without needing to add lines such as:
[Code]...
I got the following code from the demo code samples and just changed the textbox names. But it throws an error:
Private Sub Fill_TextBox()
Dim Num As Integer
Dim DSet As DataSet
[code]....
The error is:
System.NullReferenceException:Object reference not set to an instance of an object.
I have an XML file I need to parse, but only for the text, not the HTML. Here's an example of a node:
<highlights><![CDATA[<ul style="color:#000000;font-size:small;font-family:verdana,geneva,sans-serif"><li>Classy & elegant purse hooks</li><li>Choose from various styles<br></li><li>Stable and reliable</li><li>Makes a great gift! </li></ul> ]]></highlights>
As you can see, the CDATA has HTML code in it, so when I do element.Value I also get the tags. Is there any simple way to get just the text?
I am trying to be ablle to click on the following
<a
onclick="displayLoginForm();" href="Javascript: void(0);">Login</a>
I'm not sure how to do this.
is there a way to get an element by innertext then invoke a click
Okay so this is my html line with the ID: <id="accounttype" class=inline-block"><strong><?=$_SESSION['accounttype']?></strong><br>this is what it grabs
View 2 RepliesFor Each Element As HtmlElement In Browser.Document.GetElementsByTagName("a")
If Element.GetAttribute("class") = "account-points" Then
Pointcount.Text = Element.InnerText
[code].....
I have some code in VB.Net that I've been using for years that has been working fine, that is until I upgraded to Internet Explorer 9. The essence of code is below. In IE8 or earler, the code works. In IE9, when it tries to execute Br.Document.Body.innerText (or .innerHTML), I get an exception "Public member 'innerText' on type 'DBNULL' not found." When I add Br to the Watch window and hit + several times to get to inerText, it actually shows the text, but if I add Br.Document.Body.innerText to Watch, it returns DBNull as the value.Because of this problem, I removed IE9 and reverted back to IE8, and the code works fine. Of course, I would eventually prefer to upgrade to IE9, but this bug needs to be fixed first.
Imports SHDocVw
Module Module1
Sub Main()
[code]....
I am trying to get vb.net to select a single node by id. I then want get all of the childnodes within the id and place them in to textboxes. see code below:
Xml doc
<Subject>
<Items>
[Code]......
If I take the following XML:
<security>
<user>user</user>
<password>pass </password>
</security>
and call the Trim() method on the InnerText of the password node, it Trims it properly, but If I modify the fragment to look like this:
<security>
<user>user</user>
<password>pass
I can't get the Trim() method to work, pass with the spaces removed is return as pass (It has a single space at the end). I looked at the watch window and when I doubnle click the value, it shows it as:
"pass" & vbLf & ""
Is there a way to get the innertext from similar a hrefs from a page on the webbrowser? For example, say that I want to get fuzzy penguin and the numbers after it out of
[Code]...
I cannot get the messagebox to show up on my screen when the program checks the text fields on the webpage that says "this is the test".
Here its the code:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If WebBrowser1.Document.Forms(0).InnerText = "this is the test" Then
MessageBox.Show("worked!")
End If
End Sub
How to make the messagebox to show up on the screen when the program checks the text fields on the webbrowser by on the webpage?
see this codes scrapes all href links and check if it contains "/file/" to save it but I get duplicate links saved so If i can change this code to work some how with Innertext("More") I will have no duplicatestried to configure it to work with innertext it just doesn't fit the way I think it should ;/and if anyone can add how can I remove duplicated urls on my txt file that would be really nice I might need it
Dim links As System.Windows.Forms.HtmlElementCollection
Dim b As String
links = WebBrowser1.Document.Links
[code]....
When I try to do:
Quote:
RichTextBox1.Text = Form2.WebBrowser1.Document.Body.InnerText()
RichTextBox2.Text = Form2.WebBrowser1.Document.Body.InnerText()
It says
Quote:
NullReferenceException was unhandled. Object reference not set to an instance of an object.
What's up with that?
im trying to complete some data to upload to my site via my program the following code Private Sub Button11_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button11.Click
[Code]...
i have this to basically complete a form i used getelementid but it never completes i think its due to the form type, on my first button in webbrowser1 i have similiar code which logs me in and it works fine although this form is a <form id="form" enctype="multipart/form-data"> form, should this stop me from completing it with .innertext ? due to the enctype? i would also like to be able to user innertext and take it from a TextBox9.text
how do i get around this to complete these values, my code shows no errors it just navigates to the page and dosent complete anything, button1 logins fine and the code is almost identical, except for obvious differences http address etc code edited slightly posted old unfunctional version, this is now what i have, still unfunctional but makes more sense i think
When I'm coding:[quote]Form1.WebBrowser1.Document.Body.InnerText()[quote]I want to delete some text from the InnerText(). How Do I do that?
View 1 RepliesI've reached a point where it's time to learn how to Read/Write XML files properly and I'm really confused to how we're supposed to do this. I've been reading up on using the XmlDocument, but all I'm finding is how to use it to read xml files. Right now I need to Write them, later I'll code the reading of them.
The data for the XML file comes from a couple of tables in a database too, I've got a Master/Child table (actually there's 5 child tables). I've got the data coming into DataTables and I've got the loops set up already, I'm just stuck to how do I take the Master table's row and store that data as an XmlNode then loop each of the 5 child DataTable's and add each row as a child node to the master's node.
and other non-visible characters such as whitespace in XmlDocument?I tried PreserveWhiteSpace = False and IgnoreWhiteSpace = True for XmlReaderSettings, but those didn't work.
View 1 RepliesI am trying to extract a portion of text from a web page that is generated by a Java script. [URL] A glance at the source of the page shows the actual display content is not directly represent in the HTML Source. I am trying to grab the auction information in the body and not the menus on the right. Can someone point me to the right object model- methods and properties?
View 6 RepliesI have following xml:
[Code]....
and I need to pick node from Id 25 to id 75. It is a portion of XML. Original XML is very long. How to do it without XPath? Dim nodeList As XmlNodeList = xmlDoc.SelectNodes("//Node[@id >" & 25 & " and @id <" & 75 & "]") Dim sb As StringBuilder = New StringBuilder For Each childNode As XmlNode In nodeList sb.Append(childNode.InnerText) Next but it is not working ...
How can i use XmlDocument.GetElementById method? It is always return Nothing
Code:
Private mXmlDoc As XmlDocument
Public Sub Read(ByVal strFileName As String)
[code].....
I have a really simple example that reproduces an error that I'm seeing.
Module Module1
Sub Main()
Dim TransDoc As New System.Xml.XmlDocument()
[Code].....
This is a spin off of my other thread: Write XML using XmlDocument
Now I have it creating an xml file and everything's good, I'm working on the the reading of it now. Here's my current
Try
Dim XmlDoc As New XmlDocument
XmlDoc.Load(m_ImportOpenFile.FileName)
[Code]....
I'm trying to send a XML serialized class over a network stream the send is working
Dim IP As Net.IPAddress = System.Net.IPAddress.Parse(IPAddress)
Dim IPE As New Net.IPEndPoint(IP, 10003)
Dim TCPClient As New Net.Sockets.TcpClient
[code].....
I am ably to load a XML file (via a filepath) to a datatable. See code below.However, I'd like to be able to load a in-memory XML document to a datatable.
Code: Public Function XmlToDataTable(ByRef filePath As String) As DataTable
Dim ds As New DataSet Dim dt As New DataTable ds.ReadXml(filePath) dt = ds.Tables(0).Copy()
Return dt
End Function
I have two XmlDocuments that both have a namespace attribute specified. Both documents have the same structure, but contain different data. I can't seem to get a specific node tree from one document added to the end of the same node tree in a second document. Here is an example of my two documents:
Document #1:
<?xml version="1.0"?>
<rootnode xmlns="http://www.mynamespace.com/Service/2012-06-18">
[code]....
I certainly know this is wrong... I've tried serveral different approaches. This particular approach adds all <Item> nodes to the destination document, but it adds them to the very bottom of the document instead of after the last <Item>. how to add a specific node tree an XmlDocument to a specific position in another document? Again, there is a namespace involved and the <Item> nodes have nested nodes/elements under each one.
NOTE: The <Id> nodes have example data to show uniqueness only. I can never count on any kind of numbering. The order of each <Item> node is totally unimportant. I'm just assuming it will be easiest to add additional <Item> nodes after the last one in the destination document.
I am having some problems building a properly formatted SOAP message using XMLDocument in VB.NET(C# answers are fine though). I am using the following code to manually create my SOAP message, what is happening is that the namespace prefix of the soap:Header and soap:Body are being stripped in the output XML:
[Code]...
trying to parse this:
<?xml version="1.0" encoding="UTF-8"?>
<directoryresponse xmlns="https://www.sisow.nl/Sisow/REST" version="1.0.0">
<directory>[code]......
Here's my code:
XPath = "//directoryresponse/directory/issuer/issuerid"
Dim nodeList As XmlNodeList = XML.SelectNodes(XPath)
but nodelist.count=0...why?