WNetGetConnection Returns System Error 487
Jun 3, 2009
I've been trying to get the UNC path for a mapped drive in a web application written in VB.net 2005. I was able to get this code working[code]...
I tested this code out in a test application - just a simple web page. But when I plug the code into my actual project, it doesn't work. In my testing of other examples, I figured out that WNetGetConnection returns a system error of 487 - ERROR_INVALID_ADDRESS. But I don't understand why it would work in my test application but not my actual project application.
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Jun 12, 2011
I am not the original author of this software project and the code is poorly documented. I am mainly a Java/C++ developer.The program displays the tree structure and allows files and folder to be selected. The program is getting errors with FileSystemTreeView when trying to return nodes on a system with a reserved partition.Here is what is happening: tree.SelectedNode = tree.Nodes(0) 'returns error with system reserved partition.calling, GetDriveList() will properly return all the drive letters - and not throw an error. Only when trying to get a tree.Node() or tree.load() is the error occurring.
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Aug 4, 2011
I am working on a .net remoting project (VS 2008). I have a .dll hosted in IIS 6 windows server 2003 r2.
When i try to test it in internet explorer "http:localhost/hellone/test.rem", it shows the following error
System.BadImageFormatException: The format of the file 'SimpleTest' is invalid.File name: "SimpleTest"
at System.Reflection.Assembly.nLoad(AssemblyName fileName, String codeBase, Boolean isStringized, Evidence assemblySecurity, Boolean throwOnFileNotFound, Assembly locationHint, StackCrawlMark& stackMark) at System.Reflection.Assembly.InternalLoad(AssemblyNa me assemblyRef, Boolean stringized, Evidence assemblySecurity, StackCrawlMark& stackMark)
[Code]...
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Jan 3, 2011
why does my listbox returns System.Data.Datarowview?can you tell me what i need to change or adjust?
Private
Sub txtAchternaam_TextChanged(ByVal
sender As System.Object,
[code].....
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Oct 28, 2009
We have a vb application with many forms that contain a "lookup" button that has an icon called find.ico. Once in a while, a user will open one of these forms and get the below error but not every time. Has anyone else run into a similar situation? Since it is not consistent, it's been very difficult to track down.
Exception Source: System.Drawing
Exception Type: System.IO.FileNotFoundException
Exception Message: find.ico
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May 30, 2010
I'm connecting to a Web Service that returns a system.xml.xmlnode. How can I convert that to a datatable?
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Oct 19, 2011
I have windows application in which I get currently windows logged in username using following environment property
System.Environment.UserName But when I ran application using visual studio, it works without any problem. But when I publish application & try to run it, it get System.Environment.Username value as nothing.
cause of this issue? Or any other alternative to get current system logged in username.
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May 8, 2012
I have a select statement which was returning the required values but when I changed the OS date from English(US) to English(UK), it now returns null. I believe the problem is concerned with date since in the query am selecting values where the date from the database is the same as the date in a combobox but I don't know what else I can do. It almost looks like the dates in the combox and in the database are not the same and yet the date in the combobox is actually retrieved from the database and has been returning values fine until I changed the system date format.Here's my select command:
cmd4.CommandText = _
"SELECT sum(brought_qtty), recieved_qtty from brought_coffee, centre_weigh where brought_date=#" & _
dtComb.Text.Trim & "#" & _[code].......
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Feb 15, 2012
I get #Error in reportviewer when I use the following expression:
=IIf(Fields!PaymentNumber.Value>0,
IPmt(Fields!Annual_Interest_Rate.Value/1200,
Fields!Payment.Value,
Fields!No_of_Monthly_Payments.Value,
Fields!Total_Amount_Financed.Value),0)
When I remove the IPmt() function and use some static value instead, it works. Is there a way to find out the exact error ?
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Aug 9, 2010
access is denied error thought updateresource returns true value and i am running vb.net as admin
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Apr 12, 2012
I have the following function:
Public Function CheckHasRoom(people_id As String, semester As String, year As String)
' Don't let folks already registered for a room register for another.
Dim RoomSelected As String
[Code]....
But it is bugging out at hasroom.Any() saying, "Input string was not in a correct format." Any thoughts on why? This is returning a collection of rows just like where I use this same code elsewhere without issue?
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Feb 20, 2012
I've spent 2 days to figure this out, but no luck. I have an IIF expression what shows the correct value when the condition goes true (IPmt calculated), but the else always returns #error, although it should be just 0. =IIf(Fields!PaymentNumber.Value<>0,
[Code]...
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Mar 21, 2012
In our code base there is a function which should return either an object or nothing. The exact code is this : Return NothingThe calling method looks something like thismyObj = theClass.function()if myObj <> nothing then // fails
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Jan 17, 2009
When I try to save the picture and the picture is already existed it show an error
Me.Location = New System.Drawing.Point(50, 50) Create a new Bitmap object with the screen bounds Dim both As Bitmap = New Bitmap(166, 261, Imaging.PixelFormat.Format32bppArgb) Create a Graphics object that will process the screen shot front and back Dim bothgraph As Graphics = Graphics.FromImage(both) Copy the screen contents bothgraph.CopyFromScreen(0, 0, -506, -279, Screen.PrimaryScreen.Bounds.Size,opyPixelOperation.SourceCopy)' Save the resulting graphics
[Code]...
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Apr 22, 2010
Ok, here is the problem,in vbscript, i was reading parts of streams
i.e.
teststrid = left (strLine,8)
teststrnm =rtrim( mid (strLine,15,30))
teststrx = mid (strLine,57,8)
teststr = left (strLine,3)
strFormcode = left (strLine, 10)
strSymmetrycode = left (strLine,14)
strSigncode = left (strLine, 10)
Even in cases that strLine length was less than the index used to split the string, the program kept running.Now i am trying to do the same in VB.net, but since the strLine is not always bigger than the index used to break the string, it ives an error.I do not want to use try catch, because i will have very dirty and uselless code.
I was thinking something like resume next, but i guess it doesnt exist anymore.
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Jan 26, 2010
When I have a property within a class such as:
''' <summary>
''' Customer IP address.
''' </summary>
[code].....
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Mar 7, 2011
I have a page in which one chooses from a selection of dynamically generated buttons. The ASPX code is as follows:
<div>
<asp:Repeater ID="rptrHalls" runat="server" OnItemCommand="Choose_Hall">
<ItemTemplate>
<asp:Button ID="btnChooseHall" runat="server"
[code]....
When I first tried running the code I received an error message of "Invalid postback/callback argument". I set the ASPX page to have a enableEventValidation="false" property and tried running it again. It generates the page fine but when I click on a dynamically generated button it acts as if it is loading something and then just brings me back to select_hall.aspx (the page all this code is one), when (as you can see above) it should take me to select_room.aspx.
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Jun 1, 2011
<p>I cannot for the life of me figure out why the below code works when I fire it from my localhost but does not work when I publish it. I am unable to remote Debug </p><p>but it seems that I am getting Error 2250... I've tried searching for it but its too damned generic a code?</p><p> </p><p>All I want is the UNC, why is everything in .NEt so damned difficult?
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Jul 8, 2010
I'm trying to update an Access database by using an OLE connection, retrieving the information from textboxes where the user enters the new information.All the fields in my Access table are required fields, so I have validated that some info is entered in each one of the textboxes and that is the correct data type.But when I run the update query I get an error message saying something like values haven't been entered for some required parameters (my Visual Studio is the Spanish version, so I can't give the exact error message in English).The bit of code where the error occurs is inside the procedure called by my "Ok" button:
Dim campo1, campo2, campo3, campo4, campo5 As String
Dim campo6, campo7, campo8 As Double
Dim campo9, campo10 As Integer
[code]....
(I didn't post the whole code inside the procedure, but of course I'm creating the connection and everything)
The table has 10 fields, and the data is read from the textboxes and stored in variables (campo1, campo2, campo3, etc.), which I'm then using in the "set" query command.
"id" is the first field from the selected row in the datagrid, which I'm sending as a parameter to the procedure called by the "OK" button.The error message shows at runtime, so I'm guessing it's something in the query. Am I writing it correctly?
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Mar 15, 2010
I need to open a *.py file in the shell (DOS) box, but it returns an error that no file was found at the specified path. But this path is completely correct. Unless Visual Basic are referencing to paths in another matter than C#? 'Cause I am developing in C# and referenced to VB to do this.
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Jan 16, 2012
Error: ClassFactory cannot supply requested class.I installed 2003 Add-in: Office Web Components, you can download and install OWC11.exe from the following link:aunched a VB formadded the Spreadsheet 11.0 control and got the above error.
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Oct 13, 2010
I am trying to use Authorize.net's SIM payment gateway process and am using the base code provided on the developer site. The problem is I am using Master Pages with my site and the hidden field names are getting concatenated with the nested control IDs as an example:
[Code]....
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May 5, 2011
I am using VS 2008, Office 2007, and Win7 Home Premium on my system.I have a simple application which should be a breeze to build. All I am attempting to do is pull data from an Access database with four small tables into a data grid on a windows project. Should be simple, set up the data connection, choose a datagrid from the table in the data source view, drag it onto the page and done, right?I can't get it to work. It will all work fine until I attempt to run or debug the project. The data will not show up. The data grid does, but I get this error: A first chance exception of type 'System.InvalidOperationException' occurred in System.Data.dll
As I said, the project seems to build fine, but it will not pull the data. After the initial build I get the message that Windows will show this page in Compatibility View. Is it something with Win7 Home Premium, or a setting somewhere?
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Nov 2, 2009
I'm trying to use DataView.Rowfilter and I'm getting an exception which says "Cannot perform 'Like' operation on System.Int32 and System.String".
Here's the code...
Dim str2 As Double = CDbl(searchSTR)
Me.shipperDV.RowFilter = fieldName & " LIKE '*" & str2 & "*'"
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Mar 6, 2010
I wrote the code below which calculates the length of a line on the form and save record. An error occurs when the programme tries to save the record. It gives me "Cannot perform '=' operation on System.Int32 and System.String" error. I checked the data type of "ID"(int), "Microscope"(Varchar), "Magnification"(int) and "Calibration"(Decimal), and they are fine so far as I know.
Code:
Private Sub btnEnd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnEnd.Click
'Check if the length textbox is not empty
[Code].....
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Mar 21, 2011
get out from the below loop
Shared Function GetIPAddress() As String
Dim sam As System.Net.IPAddress
Dim sam1 As String
[code]....
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Nov 24, 2009
The Now() function in VB.NET returns date and time which is different from the system time that I see on the right-bottom on the notification bar. It is 15 hours slower than the system time. Has anyone ever met this problem? I'm using .NET 2.0.
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Feb 19, 2010
When I run my project I get "An unhandled exception of type 'System.StackOverflowException' occurred in System.Windows.Forms.dll"
Public Class frmViewReport
Dim objForm As New frmViewReport
Private Sub frmViewReport_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
objForm.ViewReport("C:a2.rtp", , "@parameter1=test�mter2=10")
[code]....
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Nov 16, 2009
I have the following code running, the first time I change the selected index, everything runs smoothly. However, if I try to change the selected index again, nothing happens and the subcategories combobox values do not change.
Private Sub cboMainCategory_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cboMainCategory.SelectedIndexChanged
'* make sure the combobox is fully loaded
[code]....
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May 6, 2009
I keep getting an eroor this error says: An unhandled exception of type 'System.ArgumentOutOfRangeException' occurred in system.windows.forms.dll Additional information: Specified argument was out of the range of valid values.
Option Strict On
Public Class frmWeeklyReport
Inherits System.Windows.Forms.Form
[code].....
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