I'm wondering if you know if there is a better way to write this code in order to speed it up. It has several blocks of if statements filling arrays, like this:
row0: If x < b(1, 1) Then a1(i, j + 1) = 0
If x > b(1, 1) And x < b(1, 2) Then a1(i, j + 1) = 30
If x > b(1, 2) And x < b(1, 3) Then a1(i, j + 1) = 60
[code].....
I am using visual studio 2008 and i can't seem to rectify this error..it seems simple but i really can't seem to rectify this.What iam trying to do is pass the values of an initialized string array to an uninitialized string array using a loop..here's my code:-
Document ^doc = gcnew Document("Abdul.doc");
String ^yes = doc->GetText();
array<Char>^chars = {' '};
array<String^>^splitx = yes->Split(chars);
[code]....
I'm new to VB and my question is whether all elements of an array will be initially zero per default:
Dim myArray( nx, ny ) As Single (all elements zero ?)
or do i have to loop over the array and set all elements to zero?
(p.s. my background is in Fortran where the standard does not guarantee that all elements will be zero initially and one has to set all elements to zero explicitly if one desires a zero-initialized array. )
Ok, the error I'm getting is "Load Report Failed" and it happens when I need to load a large number of crystal ReportDocument objects. I've searched on this, and there is a property in the registry that you can change to -1 and it allows to load more, however I'm still getting the error, just after I get about twice as many documents loaded.
The report is basically a one page document (for each client in the database with an interest charge). It displays the amount of interest charged, and other information pertaining to the charge. These documents are basically printed out and mailed to the client.
I created a "Print Preview" screen which has a CrystalReportViewer object, and an ArrayList property. The ArrayList property has an array of all reports, and there are next and back buttons to browse through each report. Once they are satisfied, they will print them all out, and I can dispose of the objects.
The solution for this, from everywhere I've seen, is to "Dispose the object after you are done with it". My problem is that I can't dispose it until they are finished with the print preview screen.
Is there a better way to go about this that won't require too much time to code (we are already over the deadline on this project) or a simple solution to get past the ReportDocument limit? Right now it is erroring on report 150., There are 180 records (as of today) that need to be loaded.
How can I Optimize my own code written by VB.net? Is there any tools for it? Does Visual Studio have any one? What's your suggestion? I use VS2008 as my editor.
View 1 RepliesThe following code takes a timeframe in minutes since midnight and creates an array with minutes pr hour. But, it's slow. Any better suggestions out there? (no, changing language is not an option :-) )
Const clDeparture As Long = 123
Const clArrival As Long = 233
Dim lHour As Long
Dim lMinute As Long
Dim alHour(25) As Long
[Code]...
I came across the following code recently and would like to optimize it:Public Shared Function ComputeLabel(ByVal Action As Integer, ByVal Flag1 As Boolean, ByVal Flag2 As Boolean) As String
Dim Prefix As String = ""
If Flag2 Then
Prefix = "Conditional "
[code].....
Is there a way to add comments to an array initialization? For example:
Dim test As UShort() = { _
1, _
2, _
3, _
4 _
}
I'd like to add a comment on each line, but the obvious syntaxes fail (for obvious reasons)
1, 'test _
1 'test, _
So, am I out of luck?
i am trying to add a text file in Debug folder. But when i go to project tab to add a new item, there is no option to add a new item? What part of the setting needs to be changed? Using Visual basicExpress 2010.
View 1 RepliesThe following code works fine in VBA Goal of the code is to find (select) all cells in an Excel worksheet where the backgrounf cell color is Yellow (6) or Rose (38)
Sub SelectColorsViaArray()
Dim e As Variant
Dim r As Range
Dim x As Range
[code]....
3) With the above, I still do not understand how to integrate the Variant and Array differences from VB6 to VB.Net. I know what to do with all other like: Application.FindFormat.Interior.ColorIndex ... etc.
I have main class of Races with mulitple properties. One of those properties has been defined as another class Runners.
So I have a race with multiple runners and when I try to update the data i get an instantiation error.
For the life of me I can't get it to work.
This is what I am trying to do...
In the clsRace class I have defined :
PublicProperty clsRunner(ByVal index AsLong) As clsRunner
Get
[Code].....
The last line in the code below throws the error. Is it because I haven't intialized the size of the byte array?
Public Class Form1
Private toSocket_IPP As Byte()
Public Sub New()
[code].....
Here's what I've got thus far:
Dim xpDoc As New XPathDocument(strXmlUrl & strXmlInfo(0) & "?xml=1")
Dim xpNav As XPathNavigator = xpDoc.CreateNavigator()
Dim xpExpression(9) As XPathExpression
[code]....
I have an small physics toy application I am developing. It works fine except the particles will not push each other away, only pull towards, I debugged that sub going through it command by command and realised the value 'H' would not change, what ever it was set to during the first pass through the sub is what it kept, the only way to change this value is to manually set it i.e 'h = 1'. Once the calculation is redone on the 'H' value it resets to what it was previously, even though the x1,y1,x2,y2 are all different, thus meaning H should be different.
I think it is me that has made a mathematical mistake somewhere, but I cannot see where it is. I need a fresh pair of eyes to look over my work. Please let me know if you find anything.
[Code]...
I have been developing an antivirus using vb.net. The virus scanner works fine but I was thinking of ways to optimize the scanning speed (because large files take forever)
View 3 RepliesIn a project of mine I'm currently doing this:
[code]...
all classes inherit docMain and addTemplateToList( X ) adds x to a List(Of docMain). Now my question is: Is there a better way to do what's done in the code sample? I thought of something like:
[code]...
Is this somehow possible in VB.net (Reflection?)?
I have a DataGridView where I bind a datasource (sql query) to it. The row count is high with many columns. Trying to scroll through this DGV is painfully slow.
Does anyone know of any kinds of optimization I can do so that I can scroll faster? Like what is the DataGrid doing when you scroll? Does it repaint every screenful? Does it validate every row? It seems like it is doing something unneeded when a user scrolls.
I have written a code which does the thing as the title says. The problem is, the whole process took 10 minutes just for 1000 records. Here is the code:(Written in vb.net 3.5 and sql server ce)
MyConnection.Open()
Dim count As UInt32
cmnd = New SqlCeCommand(sqlstring, MyConnection)
[Code].....
I have an array of people stored in a custom structure array... how can i copy this array to a temp array so that the temp array has all the same values as the original custom array?
View 4 RepliesI am trying to write a VB .NET (2008) DLL. When the DLL loads, I would like to perform an initialization task. Trouble is, I don't know how to do this. If I were writing this in C++, I would put the necessary code in DllMain, and all would be well. Is there any similar mechanism to DllMain in VB .NET? Or is there another way to do this?
View 4 RepliesI need to do a dynamically loaded Header and Footer on Master page where there are two placeholders to store the users controls which will become the Headers and Footers. The reason why I am doing it to make it more customizable and it is the how it is required from my supervisor as well.So I have two key-value in web.config such as <add key="MasterHeader" key="~/Controls/Header.ascx"/> <add key=" Master Footer" key="~/Controls/Footer.ascx"/>So I am wondering which Page event should I load these users controls by saying
[code]...
Where is the best Page event to put the codes above?Do I need to put something in the page directive to make it work?
I have created a project in VB.net and its working fine in my machine.But when I provide the exe to my senior to test it shows the initialization error.I came to know the reason that the error is because the microsoft .net framework is not updated in my seniors machine....So there can be a possibility that the framework might not be updated on the client's machine as well.... when the user clicks on the exe file it should check that the microsoft framework is present and updated if not then the exe file should first prompt the user that the microsoft framework is needed and should be updated and start the installation....
View 10 Repliesi want to create an anonymous class in vb.net exactly like this:
[Code]...
I am unable to initialize textbox and combobox in my form when i click on the binding navigator 'New' button. Why is it so? But at the same time the datetimepicker does!ere's the code:
Private Sub BindingNavigatorAddNewItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BindingNavigatorAddNewItem.Click
Me.CreatedbyTextBox.Text = Master.user
[code].....
I create a form2.vb which have a report viewr and modifier set to public. In reportviewer properties i add the Report1.rdlc Now i want to pass the vlue in the textbox at report1.rdlc i use following steps and code to do it butnot sucessful yet i need ur guidelines first from menu click report ___ report parameter and set the parameter name like conparm. Then i frm2 load event i write following
[Code]...
When I want to run several programs out of visual studio IDE the program couldn't be run and this message appear for me and say ("Unable to find a version of the runtime to to run this application")I am using visual studio 2005 .net My program is made by basic language.What am i do to fix this error??
View 2 RepliesI am Visual Foxpro Programmer and moved to Vb.Net.
In Foxpro for each control I add to the form, there is a method called Init where this is executed only once when the form run.
I am doing the code for a control in the Form_Load and things working fine.
I am Visual Foxpro Programmer and moved to Vb.Net. In Foxpro for each control I add to the form, there is a method called Init where this is executed only once when the form run.
View 2 RepliesI am experiencing some trouble with the autogenerated initializecomponent function. Visual Studio insists on initializing a variable like the following, when I drag a usercontrol onto a form:
Dim HierarchyTreeNode1 As NewDelfiLib.HierarchyTreeNode = CType(New System.Windows.Forms.TreeNode(""), ND.HierarchyTreeNode)
why is this code not working?
Dim tcplistener As New System.Net.Sockets.TcpListener
This does not compile with the error "Overload resolution failed because no accessible 'New' accepts this number of arguments." The thing is, I have to declare it as New because otherwise I will get a null-reference exception...