Possible To Make A Node Optional In XML Literals?
Nov 22, 2011Dim task As XElement = <task>
<body>body</body>
<optional><%= myVar %></optional>
[code].....
Dim task As XElement = <task>
<body>body</body>
<optional><%= myVar %></optional>
[code].....
I currently have this XML schema :
<PSC5>
<POI_ORI>
<CIT>LIM</CIT>
</POI_ORI>
</PSC5>
if user want to add a new option, the final schema will be :
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I use VB to get data through my form. I have some optional fields in my form and I have a problem with the following code:
MsgBox(myXPathNavigator.SelectSingleNode( _
"/my:Status/my:Questions/my:Questions1", Me.NamespaceManager _
).IsNode.ToString)
When the optional field 'Questions1' is inserted into the form I get the value 'true' by the IsNode() function.
If the field it is not inserted I have an exception stating that the reference is not correct (and it is indeed true). Is there a way to verify about a node, whether it is present or not in my form?
I am trying to have an optional Date value in one of my sub but since you cant set Date to nothing, this doesn't work. And i cant set it to the Date.minvalue inline.
Private Sub abc (ByVal A As String, Optional ByVal B As Date = Nothing)
End Sub
So, i went and set it to some date in the past.
Private Sub abc (ByVal A As String, Optional ByVal B As Date = #1/1/2001#)
End Sub
what would be the proper way to handle the default value for an optional Date?
I want to select a node and make another control visible for that node using an if then statement. From what I read I think I have to put the code in the After_Select method. I gave each node its unique name and unique tag but can't figure out how to address a node name. basically want to click a node and make a panel visible associated with that node. tried something like "If me.treeview1.selectednode.nodePanel1 then pnl1.visible=true" but intelisense doesn't recognize any of the named nodes. can anyone give me some sample code.
View 1 RepliesI have a simple treeview, when I click a node I want to be able to make a panel visible when a node is clicked using a simple if then statement and make the other panels associated with the other nodes invisible. From what I read the code should be placed in the afterselect method. Was thinking would be similiar to a list box using selected index or something but can't seem to get it to work.
View 5 RepliesI m making a "offline viewer" which uses saved webpages. I'm using a web browser and a tree-viewer. Is there a way to make the selected node in the tree viewer change if you click on a link in the web page (i.e if you select a link about The Gimp on tutorial 176, the selected node will change to The Gimp tree node)
I know about the code for changing the tree node selection, however what I'm having trouble with the web-browser side of it.
1. I need to be able to store the STR MG INT and SPD somewhere when they create an item and make sure it is assigned to that item, and since I allow them to create unlimited item, I need this way to be dynamic (as in create variables as needed).
2. I need to find some way to make sure the user has selected an item name in the treeview (not type or main node).For example, they need to click Hockey Mask and then click the equip item button for it to work?
i have a treeview which has a bunch of parent and child nodes preset at design time, there is 1 parent node tho which is called developer, that i want to add child nodes to at runtime.When the form first loads im trying to have it check a text file and for each line in the text file add the text/string from that as a child node tot he 'developer' parent node.
vb
Dim reader As String = My.Computer.FileSystem.ReadAllText(Application.StartupPath() & "ConfigDevs.txt")
Dim strs() As String = Split(reader, Environment.NewLine)
For Each s As String In strs
[code]....
Thats what i have so far, how can i set it so 'Dim parentNode As TreeNode = ' points at the 'Developer' node?
I have a tree view in my project with a parent node and with theoretically speaking infinite child nodes.
Now I want to delete the last child node from the tree view when the user presses a certain button. I thought I could do this trick with this code:
Private Sub Bundo_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Bundo.Click
Try
[Code]....
I have a treeview which have a listimage. And it has imageselectindex property (image is yellow ball)My problem is : When i click any node, the image of that node shows imageselectindex . I only want thirth child node will show it. I dont want when i click at first node (rootnode) or child of roodnode , the yellow ballon shows.
View 9 Repliesi need to check all child node when the parent node is checked and i had do research from the internet but it seem that i had a error which is Type 'MSComctlLib.Node' is not defined.do i need to import any reference? [code]
View 4 Repliesi got treeview with some root, parent and leaf node but when i create a foreach loop it alway read the 1st value with is 4
For Each node As TreeNode In Me.TreeView1.Nodes
'Label1.Text += node.Text & "</br>"
If (Not node.Checked) AndAlso (node.Value = module_id) Then
[code].....
My XML comes in like this:
<Document type="ContentPage">
<Fields>
<Field name="FaqCategory" type="dropdown" title="Select Category:" index="FaqCategory"
[code]....
How to add a child node to a specific node in treeview?
Say i have "Item1" in treeview already, How do i add "SubItem1" to "Item1" as it's child node?
I know its probably really simple, but i tried lots of stuff, i just cant get it working.
Basically, it refuses to find the node when the root node contains an attribute.
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When I do xml.SelectNodes("DataSet") with the xmlns in the root tag, it finds no nodes. If I remove the xmlns attribute, it works fine.How can I make it work while leaving the attribute?
Finding the level of the particular xml using a node value in .Net Experts ! This is my sample Xml.This is a tree structure and T->T.1,T.2->T.2.2,TA->TA.1 - this is the tree strucutre. I know the value of tag . ie 1232,1343.. etc.Using this ID how can I find that 1343 is coming under 1232. or 1490 is under 1090 which is again under 1232.Expected output : if i pass 1490 then I need to know 1490,1090,1232 etc (from that nodeto the top node).I am using .net 2.0
<Abc>
<A>
<Name>T</Name>
<Id>1232</Id>
[code]....
I have a treenode loading and I allow a user to add a node as a favorites node. I am trying to think like the user so I wanted to find out what happens if I deleted the folder form the tree and re-rann the app. Well it comes up with an error:
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Is it possible to remove a node from the treeview identifying it by the node's tag? if so how?
View 2 RepliesI have a class called Profile that has some simple properties and then it can have a collection of ProfileItem that again has some simple properties and then it can have a collection of ProfileItem (RECURSION). Now I am trying to generated a very simple save function using XML Literals that come with VB.NET (3.5).
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is there a way to enable IntelliSense for XML literals in VB9 (VS 2008)?The ideal source of IntelliSense is an XSD document, but I can use anything else format to do it.
View 2 RepliesIs it possible to use variables like <%=person.LastName %> in XML string this way?
XElement letters = new XElement("Letters");
XElement xperson = XElement.Parse("<Table><Row><Cell><Text>
<Segment>Dear <%=person.Title%> <%=person.FirstName%> <%=person.LastName%>,
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If it's possible, it would be a lifesaver since I can't use XElement and XAttribute to add the nodes manually. We have multiple templates and they frequently change (edit on the fly).
If this is not doable, can you think of another way so that I can use templates for the XML?
[URL]
How do I use character literals in VB?I get error for following code:
op as Char
op = '+'
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I am using XML Literals and Linq to XML to read/write data to an external system.[code]The client now wants to put the url in a parameter table so the table can change to point to a test server or a real server. I assume that I cannot put a variable in my Imports statement.So how to I access the correct URL from a variable?url...
View 13 RepliesI'm using the following function to brighten up color values (it's a lambda in my code, but that shouldn't make a differende):
Function ReduceDistanceTo255(ByVal i As Byte) As Byte
Return i + (255 - i) 2
End Function
It won't compile, since the compiler interprets 255 and 2 as integers rather than bytes, making the result of type Integer. Unfortunately, there is no Byte type character, so I cannot just write 255B or something like that.There are a few obvious workarounds to the problem:
Function ReduceDistanceTo255(ByVal i As Byte) As Byte
Return i + (CByte(255) - i) CByte(2)
End Function
and
Function ReduceDistanceTo255(ByVal i As Byte) As Byte
Return CByte(i + (255 - i) 2)
End Function
[code]....
The first one is just plain ugly and hard to read, because every literal needs to be CByted. The second one performs calculations in integers and then converts the result to Byte, which is OK, but not as elegant as a pure-Byte operation. The third workaround doesn't require CBytes, but it's drawbacks are obvious.
In VB.NET I can easily embed strings into XML literals using <xml><%= "my string" %></xml>. How can I embed an XElement instance? I know I can use methods on the XElement, XNode, etc classes, but I'd like to do it in the XML literals if possible.
View 2 RepliesI am constructing some XML using XML literals. I have a function which returns an XElement.
Function RootElementFormattingFunction() as XElement
Return <Root Data="foo"/>
End Function
In reality it is a bit more complicated than that, but it is called from several places. Now I have linq sequence which generates a set of nodes which I want to make children of the XElement returns
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I'm trying to use the builtin XML literals feature to create/read xml files using my own schemas, but I don't see a way to cast an abstract XElement from a base type to a more derived type.The schema/xml below shows in general what I'm working with, but using XML literals only allows me to use the base type in the IDE, so the xml below is treated as a collection of elements of the base type, instead one of the base type and one of the derived type.
<schema targetNamespace="Test" xmlns="Test">
<xs:complexType name="Base" abstract="true">
<xs:attribute name="Id" type="xs:int">
[code]....
Is there any other way of removing a specific tag other than looping through every tag and checking a certain value? I would assume this could become of timely process if there are many tags.
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As basic as this is, it took me a few minutes to figure out, so wanted to share with the rest of the community to avoid anyone else from wasting their time.
I am attempting to generate the following XML string using VB.NET XML Literals
<Books>
<Book Name="The First Book" />
<Book Name="The Second Book" />
</Books>
[Code]....
But the compiler is complaining about the quotes that are supposed to surround the attribute value. I tried using single quotes, two double quotes, nothing works.