I can't figure out how to get my code to evaluate the grandchildren of a specified node, where the grandchildren have two attributes which need to be evaluated to determine if the combination exists in the xml file. The function should return true if the two attributes of the grandchild node exist.
View 1 RepliesI'm having an issue trying to figure out how to extract certian attributes from xml elements. Everything I have tried outright doesn't work or it concantinates the data. Here is the xml that I am trying to extract the 2 attribute values from an xml element.
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Dim classCodeDetails As List(Of ClassCodeDetail) =
db.ClassCodeHeaders.Single(Function(cch)
cch.CLCH_ID = classCodeHeaderId
[Code]....
My question is how can I sort on multiple attributes? I want to sort first by Make.MAKE_English, then By Model.MODL_English.
I am currently trying to read an XML file and display the information within a Datagridview. I currently have this working using the below
Dim xmldoc As XmlDocument
Dim xml_nodelist As XmlNodeList
Dim xml_node As XmlNode
xmldoc = New XmlDocument()
xmldoc.Load(openFD.FileName)
[Code] .....
Basically what I want to be able to do is for each <ADVERT> node, so in this case there would be two, I can get the information from both the TITLE and NAME attributes and add them into the Data table which then gets displayed within the data grid view. Currently I can only get the TITLE attribute values to show?
How can I use the Evaluate function in VB.net in Visual Studio 2008 so that to evaluate a string which consist of 2 variables to be evaluated.[code]...
View 2 RepliesI am trying to create a procedure which will evaluate a string expression as if it were a line of code...Kind of like what a graphing calculator does when you enter a formula. Does anyone have any experience with this in VB? I have an example of C++ code which uses CodeDom, but I am a bit rusty with my C++!
View 4 RepliesI need to access a list of attributes as follows.I'm drawing a curve named "CurveName". With Curvename I need to access the curve color, the data symbol etc.I tried this:
Dim cllCurveAtt as new cllCurveAtt
sub SetAtt
cllCurveAtt.Add(CurveName, "Color.Red")
......
end sub
If I then want to refer to the curve color through cllCurveAtt(CurveName) I get an error because "Color.Red" is not a system color, it should be Color.Red without the quotes. But if I remove the quotes in the assignment THAT causes an error because since CurveName is a string, that color thing should also be convertable to a string. Catch 22.
[code]I need to select the one ID only which have high priority.I am using below code but it just can bring the data only matching with group and i need order by priority to just bring only ID which priority is high.[code]
View 6 RepliesAlright so heres the issue when this code runs nothing happens! This is all I could find on the internet on how to disable an account and then remove it from the GAL.
Dim Val As Integer = CInt(AdObject.GetDirectoryEntry.Properties("userAccountControl").Value)
AdObject.GetDirectoryEntry.Properties("userAccountControl").Value = Val Or &H2
AdObject.GetDirectoryEntry.Properties("msExchHideFromAddressLists").Value = "TRUE"
'AdObject.GetDirectoryEntry.MoveTo(MoveTo)
AdObject.GetDirectoryEntry.CommitChanges()
m_ArchiveBoolean, m_HiddenBoolean, m_ReadOnlyBoolean, m_IndexedBoolean, m_CompressedBoolean are all form level booleans that's set from their appropriate Checkboxes on the form before this code runs in a BackgroundWorker.
Why is it that this code works:
Try
Dim fi As New FileInfo(element)
[code].....
I have some custom user controls (asp.net) that is loaded via a configuration file this works great..
Problem - Some of these user controls I made you set some parameters.
Example - oUCtrl = page.LoadControl("UserControls/" & oCtrlNode.Attributes("name").Value & ".ascx")
This loads the control.. now that node has more attributes.. example url="www.google.com" in the config file
<control name="RSSFeed" url="www.google.com"> To set the url on the control it would be oUCtrl.url = "www.google.com"
is there a way to enumerate the properties of a user control or a way to use something to eval a string like eval("oUctrl." & currentAttributeName & "=" currentAttributeValue)
Not sure the best way.. i would assume the best way would enumerate the public properties of the user control and compare against it.
I'm trying to create a treeview in a VB 2008 project that shows all the elements and attributes of an XML Schema.The MSDN documentation for XML schemas seems to imply that by loading the schema into an XMLSchemaSet and compiling it I should get access to all the elements and attributes with their values but this doesn't seem to work in practice.
Using a for loop such as:For Each elem As XmlSchemaElement In compiledSchema.Elements.Values
I can use elem.Name to get the element name (and attribute name with a similar nested loop) for a simple type but this doesn't work for a complex type.Whenever (and however) I try to get values for complex types I hit a brick wall.
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I have created a simple app to display a digital clock, it can create child windows (dialog boxes) to do various chores, one of those chores involves a lengthy background task, so I create it in a modeless manner, so it doesn't block the main program. It all works well... kind of took me awhile to figure it all out, but there is one little cosmetic issue.
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I'm trying to evaluate a lastname and then set a value. so first two characters of last name btw M-MI would be M1, MJ-MZ would be M2
View 1 Repliesif i do not need to evaluate all the expressions, am i right to say that there are benefits and no disadvantages of using AndAlso compared to using And
example:
if a=b And f=g And y=k
can be better done with:
if a=b AndAlso f=g AndAlso y=k
I have this code and it evaluates to false instead of a string. All its doing is building a string.
[Code]...
This is probably a basic question, but I have never used this syntax before. Can someone tell me in detail how this expression evaluates to true? [Assuming IsOdd is a boolean type].
Dim i As Integer = 3
IsOdd = (i And 1) = 1
I am using a class to check for certain words in my application to prevent SQL Injection. In the class, there is a for loop that tries to match a specific word with the words from a blacklist. If there is a match, I must redirect to the system's error page. However, when a match is found and I try to redirect, I keep getting the error "Unable to evaluate expression."
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So I am trying to evaluate 3 conditions in an if statement. Its not working how I would assume it should. I basically want to do this:
vb.net
If PGN = &HEF007E And PGNData(0) = &H58 And (PGNData(1) And &H40) = &H40 Then IgnOn = True Else IgnOn = False
If I write it in that manner it gives inconsistent results. If I workaround by writing it this way it works perfectly:
vb.net
If PGN = &HEF007E And PGNData(0) = &H58 Then
If (PGNData(1) And &H40) = &H40 Then IgnOn = True Else IgnOn = False
Endif
What is the proper way to do this with only one if statement?
I am looking for a way to simplify algebraic expressions in VB.NET. It is preferred if you can give me a link to a pre-written library or class.
View 1 RepliesI have functions in my program that stop after it reaches a Return line but I need the function to continue in case what I want the function to return changes. Is there a workaround for this or a way to force the function to continue after a return?
I made a Test Program to demonstrate the problem. It is a Form that contains only a button.
Here is the source code:
[Code]...
The messagebox always says "It returned False" when if it continued going through the code like I want it to it would have returned true.
I have an LLBLGen Pro project which has generated VB.Net 2.0 Self Servicing code.I have a function to return a list of custom structures based on a search using the generated code.I would like to supply a Dictionary of FieldNames and Values to this function and for each one add a new Predicate Expression to the search.How can I check the String within the dictionary that represents the Field name and work out which EntityField to add the Predciate Expression for?
Dim dbFiles As New AllFilesCollection
Dim dbFilter As New PredicateExpression
If Not String.IsNullOrEmpty(ClientName) Then
[code].....
visual basic 2008 express
access 2007 db
I am attempting to fill a form with multiple rows from an access table based off of a parameterized query. My query works fine but I don't want to return one row at a time, I want to return all rows that match my query in multiple text boxes. I know that I can use a datagrid view to accomplish this, but I would prefer the look of a textboxes on a form. I have read through many books and searched the internet forums but think I may just not know what to search for as nothing has worked yet. Can anyone point me in the right direction. So far I have tried setting the text box value to the row().item(), creating a different dataset for each row, and even setting variables for the results of the query to then be passed to the text boxes. Since none of this work, I don't really have any starting code to post. If I could just get a starting point I could work from there, so don't feel the need to code anything for me, just set me in the right direction.
I have this line in some
Integer.TryParse(ThisRow.Item("DatumID").ToString, n)
ThisRow is a datarow. The "DatumID" in this case happens to be an empty string, but is not Null. When I break on this line, and try to evaluate it by highlighting it and pressing Shift+F9, I get the message "Unable to evaluate expression". Interestingly, it is actually evaluating correctly (since the item holds an empty string, TryParse returns False).
I have tested this in every way I could think of (mostly I thought I had left out a parenthesis in my expression, but that wasn't true). So why won't that expression evaluate when tested, even though it is actually working correctly?
I am new to VB.NET and I keep telling myself there must be a better way to do what I need to do several times a day which is look into a list and see if that one field is set to true anywhere in that list.
So far, I've been using the For Each statement:
[Code]...
But I know some of the other languages can do something like: if ListOfPlayers(*).isActive == true
which just seems more concise and to the point.
I have a Winforms project that is loosely based on MVVM. Security is implemented by the domain layer by using the PrincipalPermissionAttribute, [cod]e...
View 1 RepliesI'm reading a tutorial provided by someone at my university, and it claims that if you're debugging a VB.NET program, you can hover over a conditional (e.g. "Age > 13") and it will be evaluated. However, in VB 2010 Express, I am not seeing this functionality.
I believe the tutorial may have been written for a previous version of VB.NET, so I was wondering if anyone could tell me if this used to work and has been removed, or whether it has never existed?!
I am able to hover over a variable and see it's current value, and I can even "Watch" an expression (such as the conditional), but the tutorial claims[code]...
I am use to coding in php and everything does not need to evaluate to true or falst in an if statement. I have this [code] How would I make that return true or false?
View 3 RepliesI need the create a function with two variables Price1 and Price2 and the following rule:
if Price1 > Price2 at time t and not (Price1>Price2) at time t-1 Then
result=true
else
result=false
I should be able to use a loop to store the time t and t-1 Price1 and Price2 values.How can I do this in VB.net
[code] please help me how to get and/or evaluate object from this json string with VB.Net.
View 1 Replies