problem about vb.net-2010-Collection of common programming errors


  • ZmanX
    .net visual-studio-2010 ide gdi+ vb.net-2010
    Having difficulty with Graphics.DrawLine Creating an Access Violation. Tried Restarting VS2010/the computer, Repairing the Framework, windows update, and looking for any kind of patches or patches to remove. Nothing seems to get rid of it. Even the sample on the MS site crashes with the error. Not sure what to look for to fix it. It used to work so I’m betting its a bad patch somewhere, just not sure which. Currently running under windows XP.Update 1: Updated the code to cross reference wi

  • Sepia
    vb.net asynchronous vb.net-2010 doublebuffered double-buffering
    I am trying to create a game with 2d graphics in VB.net. The problem I am having is that, with the minimal example source code below, there is the risk that both the asynchronous worker building the back buffer and the paint routine displaying the current buffer will end up attempting to work on the same buffer, when the paint routine is not fast enough to complete the paint before the buffers are switched and the asynchronous worker attempts to access the new back buffer before it is released f

  • Mina Nakhla
    ms-access-2007 vb.net-2010
    ok so i added a Ms access table to the vb.net application then i made a filter that table contains come columns with DBNull values the problem is that whenever i start writing anything in the filtering which have a cell with dbnull value it gets me that error””” The value for column ‘Postion’ in table ‘Parts’ is DBNull. “””and the exception details is “””””””””””””””””System.Data.StrongTypingException was unhandled by user codeMessage=The value for column ‘Postion’ in table ‘Parts’ is DBNu

  • minitech
    vb.net vb.net-2010
    Well i got some hard time figuring out what am I doing wrong. Basically I need to remove Listbox1 items that are less then avarage, but its giving me:System.ArgumentOutOfRangeException was unhandledMessage=InvalidArgument=Value of ‘9’ is not valid for ‘index’. Parameter name: indexPrivate Sub Label3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Label3.ClickDim Myrand As New RandomDim res As DoubleDim i As IntegerDim n As IntegerDim tot As DoubleDim avarage As DoubleLi

  • user1001493
    vb.net-2010 nested-lists
    I’m new to VB.net and requires your help. I’ve two vb.net Structures, Quotation and FareAsPerVehicleType, Quotation is dependent on FareAsPerVehicleType. I am trying to add VehicleType in Quotation by using the following:Dim Quot As New Quotation Dim vT As FareAsPerVehicleTypevT.TypeOfVehicle = “S”vT.Fare = _raw_Price * vF.Saloon_Factor Quot.VehicleType.Add(vT)Public Structure FareAsPerVehicleTypeDim TypeOfVehicle As StringDim Fare As Decimal End StructurePublic Structure QuotationDim VehicleTyp

  • Bill the Lizard
    vb.net vb.net-2010
    I developed one application in VB.Net 2010. It worked fine on my laptop. Now when I run this on another PC, it just crashes and give windows error as below.Application: CallinkMig.exeFramework Version: v4.0.30319Description: The process was terminated due to an unhandled exception.Exception Info: System.InvalidOperationExceptionStack:at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBas

  • Peter Mortensen
    vb.net vb.net-2010
    When debugging I get the following error.Unhandled exception has occurredCould not complete operation since a file already exists in this path “C:\32bit\abc.dll”How can I fix this issue?Imports System Imports System.IOPublic Class Form1Private Sub ReactorButton1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ReactorButton1.ClickIf ReactorComboBox1.SelectedItem = “Some Program” ThenMy.Computer.Network.DownloadFile _(“http://somesite/test/abc.dll”, _”C:\32bit\abc.dll”, T

  • l3_08
    vb.net vb.net-2010
    I’m working on an app that writes to excel. The following piece f code is working properly ( it fills the requested cell) but generating a run time exception that I can’t get rid of. For i = 1 To 1000 Step 1If Not (cPart.Range(“A” & i).Value = Nothing) ThenIf (cPart.Range(“L” & i).Value = Nothing) ThencPart.Range(“L” & i).Interior.ColorIndex = 3 End Ifi = i + 1End IfNextthe exception is: COMException was unhandled :Exception from HRESULT: 0x800A01A8 any help?

  • Chris Dunaway
    vb.net vb.net-2010
    i have a sub that will try to get random foods in the database, get the sum of these food’s calories and check if they wont exceed the required calories.most of the time the sub worked, but sometimes this error appears. this is my code. it is kinda long. Private Sub lunchgenerate()Dim grams As Integer = DSgrams.Tables(“grams”).Rows(0).Item(“grams”)Dim grams1 As Integer = DSricegrams.Tables(“ricegrams”).Rows(0).Item(“grams”)Dim grams2 As Integer = DSgrams2.Tables(“grams”).Rows(0).Item(“grams”)Di

  • Umar Bachena
    vb.net-2010
    please am trying to apply for a request from my website that am working on and l got this error: Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression. Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression. The ‘CalCulateClaimForDeath’ procedure attempted to return a status of NU

  • Mark Hall
    vb.net-2010
    Imports System.Data.OleDb Public Class Form1Dim con As New OleDbConnectionDim cmd As New OleDbCommandPrivate Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.LoadEnd SubPrivate Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Clickcon.ConnectionString = “Provider=Microsoft.Jet.OLEDB.4.0;Data Source=G:\ragesh\vb\registration\db\register.mdb”cmd.Connection = concon.Open()cmd.CommandText = “insert int register val

  • Annonomus Person
    .net vb.net forms runtime-error vb.net-2010
    Private Sub Button_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button.ClickDim CaseCompareItem As String = ListBox.SelectedValueSelect Case CaseCompareItemCase “MyText” Or “NotText”MsgBox(“YAY!!! IT WORKED!!!!!”)End Select End Sub(I shortened the code quite a bit: I didn’t want to have 12 different cases that are unnecessary.)All I get is a runtime error. The error reads:System.InvalidCastException was unhandled Message=Conversion fromstring “Canoe (Not In Service

  • nectarines
    vb.net vb.net-2010
    I have the following stored procedure and I’m calling it from my Windows Forms application DataSet like this: Me.TransactionTableAdapter.spPaymentApply(130, iAmount, Now)Although I provide the CustomerID, (and stepping in the code to see if it’s actually there – and it is) I get the following error during execution: Procedure or function ‘PaymentApply’ expects parameter ‘@CustomerID’, which was not supplied.Here is my SP:USE [dbPB] GO /****** Object: StoredProcedure [dbo].[PaymentApply] Scri

  • Mitsosp
    jquery asp.net devexpress vb.net-2010
    I have a problem with the following code block:Dim scriptHere As System.Web.UI.HtmlControls.HtmlGenericControl = control.Page.FindControl(“scriptHere”)Dim controlID As String = “”Dim disabled As String = IIf(isDisabled, “true”, “false”)If TypeOf (control) Is ASPxEditBase ThencontrolID = control.IDEnd IfTrycontrol.ReadOnly = isDisabledDim script As String = “”script &= “<script type=””text/javascript””>” & vbCrLfscript &= “// <![CDATA[” & vbCrLfscript &= “try {” &

  • Logan
    .net vb.net vb.net-2010
    Currently, I am attempting to send an email using VB.NET. Now, I have added a reference with this code: (I have added placeholders)Module Module1Sub Main()’ Create an Outlook application.Dim oApp As Outlook._ApplicationoApp = New Outlook.Application()’ Create a new MailItem.Dim oMsg As Outlook._MailItemoMsg = oApp.CreateItem(Outlook.OlItemType.olMailItem)oMsg.Subject = “Send Attachment Using OOM in Visual Basic .NET”oMsg.Body = “Hello World” & vbCr & vbCr’ TODO: Replace with a valid e-ma

  • atrueresistance
    asp.net vb.net performance vb.net-2010
    I am wondering what the difference between HttpContext.Current.User.Identity.Name.ToString.ToLower and Thread.CurrentPrincipal.Identity.Name.ToString.ToLower. Both methods grab the username in my asp.net 3.5 web service. I decided to figure out if there was any difference in performance using a little program. Running from full Stop to Start Debugging in every run. Dim st As DateTime = DateAndTime.NowTry’user = HttpContext.Current.User.Identity.Name.ToString.ToLoweruser = Thread.CurrentPrincipal

  • kimleng
    sql sql-server vb.net-2010 report-viewer2010
    I have a problem in query data from database to make report in VB.NET. I use the Business Object to do the report. And here is my example data:___________________________________________________________________________ | | | | | | | | Id | Item | Unit | Unit Price | Quantity | Amount | |____|_______________|__________|_____________|___________|_______________| | 1 | Gasoline | L | $ 2.00 | 1

  • NapkinBob
    vb.net combobox dataset vb.net-2010
    I’m looking for some advice on the best way to handle this.I have a list of about 200 “Functions” which are listed in a combo box. When the user selects a ‘function’ from the list, I need to return the functionID (integer). I know this can be done easily by binding a dataset to the key and value of the combobox, I’m just not sure about the best way to populate the dataset.I feel that the way I’m doing it currently is very convoluted:I currently have a txt file as an embedded resource which I wr

  • user1385570
    c# javascript asp.net vb.net-2010
    I’m converting VB.NET code into C#. The following code doesn’t work in C#. Can someone please help with Syntax. I have tried ImageUrl='<%=setImage(#Eval(“TPU”)) %>’ still no luck.The issue, it doesn’t call the setImage() function in the code behind. I get the following error: The best overloaded method for myPage.setImage(string) has some invalid arguments. Argument ‘1″:cannot be convert from ‘object’ to ‘string’aspx page<asp:Image ID=”img1″ ImageUrl='<%#setImage(Eval(“TPU”)) %>’ run

  • Raj Sharma
    vb.net-2010
    i am getting sum of overtime(HH:MM:SS) of employee between two dates 1.09:32:00 insteadof 33:32:00(HH:MM:SS)……….what kinda format 1.09:32:00 is ???please help me to get in format 33:32:00(HH:MM:SS)……TryTotal.Visible = TrueDim cs As String = “Data Source=.\SqlExpress; Integrated Security=True; AttachDbFilename=|DataDirectory|\PayrollManagerDB.mdf; User Instance=true;”con = New SqlConnection(cs)con.Open()cmd = New SqlCommand(“select RTrim(WorkingDate)[Working Date], RTRIM(EmployeeID)[Em