im getting this error MySqlConnection.Open() Unhandled Here is the code i'm using
Imports System.Data.SqlClient
Imports MySql.Data.MySqlClient
Public Class LoginForm1
Dim MySqLConnection As MySqlConnection
[code]....
...this:
Dim Connection As MySqlConnection
and this:
Dim Connection As MySqlConnection()?
I have the following code:
[Code]....[Code]....
I get the compiler error message: error BC30560: "MySqlConnection" ist im Namespace "MySql.Data.MySqlClient" nicht eindeutig. in English (I think): "MySqlConnection" is not unique in Namespace "MySql.Data.MySqlClient".
ok so i viewed some other question that are ruffly the same and i am still confused, here is the stacktrace
at Game3.My.MyProject.MyForms.Create__Instance__[T](T Instance) in 17d14f5c-a337-4978-8281-53493378c1071.vb:line 190
at Game3.My.MyProject.MyForms.get_Character_Creator()
at Game3.My.MyApplication.OnCreateMainForm() in C:UsersMasonDocumentsVisual Studio 2010ProjectsGame3Game3My ProjectApplication.Designer.vb:line 35
[Code]...
also, where is game3.my.myproject, obviously its a line of code but what is it in.
I am trying to transfer data from a VB form to an existing Excel 2003 file. This is the code I am using, but it is throwing up the following error:I have coded in VBA but am new to VB.NET and am struggling with setting up the objects
Dim oXL As Excel.Application
Dim oWB As Excel.Workbook
Dim oSheet As Excel.Worksheet
[code].....
Dim SQLInfo As String = "server=https://lotus.x10hosting.com:2083/frontend/x3/index.html;" _
& "uid=uid;" _
& "pwd=pwd;" _
[code].....
Just got a mySql database up and running (about 3 weeks ago) and it's working fine for web pages with PHP, but wanted to see if I could access it from Visual Basic (why not right). So I downloaded whats needed to get the MySqlConnection working and Been looking around online and nothing is very intuitive as to what the problem is. The error message is:
MySql.Data.MySqlClient.MySqlException: Host '192.168.2.184' is not allowed to connect to this MySQL server
Say I have a connection to a database. After reading some stuff I want to connect to the same database. So I naturally use the first database mysqlconnection.serverstring the password and username is not included in connect1.ConnectionString. So how can I do so? Is this by design?
[Code]...
I am create a new project in Vb 2008 Express edition. And back end using MYSQL( MYSQL ODBC 5.1 Driver) . Now running is correctly but Build time have a lot of error in this project depending MYSQL connection part. What can I do...? [code]
View 2 RepliesIm creating a service for a mobile platform and I need to process user messages on a different thread than they were created on to leave the threadpool open.Anyway my App will be using a MySQL database and when it gets a message it will add the message to Another thread pool. But in the sub that procceses the messages I will need to perform query's on the database. So i know i can use a global variable and it will be visible to all threads but is making database operations safe while using a thread pool with a global mysqlconnection?
View 2 Repliesi am in project of medical billing.i am on LogIn form in vb.but i have Erro - "InvalidOperationException was unhandle " and while i was run program it didn't say which line i had error.
here is my code.
Imports System.Data.OleDb
Public Class login
Inherits System.Windows.Forms.Form
[code].....
I have made a tic tac toe board and when i go to debug the application i get a "NullReferenceException was unhandled".
this happens diring this part of the code:
Dim x As Integer = Val(index.Chars(0))
Dim conn As New OleDb.OleDbConnection
Dim ds As New DataSet
Dim da As OleDb.OleDbDataAdapter
Dim sql As String
[code]....
The above code stops running at the point of the da.fill line with the error that the specified table does not exist.In my limited knowledge so far to me it looks like the operators table exists as it showing in the Solution Explorer.
Trying to port old code from VB6.
Public CHandles() As Long
Public SHandles() As Long
Public rerrors() As Long
[code]....
Generates a SafeArrayTypeMismatchException was unhandled. Specified Array was not of the expected type error.I assume it means the SHandles, rerrors, and CHandles arrays but not sure.
The exception is thrown in a defined class when trying to call a Sub procedure.
The main Form1:
Imports TeenyStudent.Student
Public Class Form1
Private students As Array = Array.CreateInstance( _
GetType(Student), 20)
[code]...
I'm getting a "TypeLoadException was unhandled" error. The description says Could not load type 'dnUtilities.OtherFunctions' from assembly 'dnUtilities, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
So i've got a class library project. I've built that into a dll and am referencing it in a project in another solution. The name is "dnUtilities" and i've stored a lot of subs and functions inside it. I just got this error when i added a new module and tried calling a sub from it. I've got no idea why this error is happening since all the other functions from the other modules work. Besides modules i've also got a usercontrol in the dll. The framework of the dll and my calling project are both 3.5.
I was testing out an application that I created which then I recieved an error as said in this topic title. The application that I am making is one where it requires 2 form GUIs, my main one is called frmConferenceRegistrationSystem (the first picture) and my secondary one is called frmConferenceOptions (The second picture) and what they are supposed to do overall is total up the cost of registering for a conference that is selected in frmConferenceOptions and the error that I am recieving is within the ElseIf statements in the frmConferenceOptions form (third picture and first section of code) And also here is the rest of my code for both of my form GUIs at the bottom of this topic
If ltbList.SelectedItem(IntrotoECommerce) And ckbConferenceRegistration896.CheckState = CheckState.Checked Then
My frmConferenceRegistrationSystem Code:
Public Class frmConferenceRegistrationSystem
[code]....
I am making a simple calculator and it's saying InvalidCastException was unhandled when I try to debug it, here's the code, please tell me whats wrong with it: (and yes I have renamed the textboxes to addequals etc...
Public Class Form1
Private Sub WebBrowser1_DocumentCompleted(ByVal sender As System.Object, ByVal e As System.Windows.Forms.WebBrowserDocumentCompletedEventArgs)
End Sub
[code].....
i have a probleam with my coding.The error which i got is olehDBexeception was unhandled.In my coding here i am developing function use to subtract number in database based on user input.I dont how to solve this error? I also highlight the line cause an error and also i attach picture of the probleam.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
'open db connection'
[code]....
[code] I'm basically trying to see if a record already exists. My problem is when I run this I get a "ArgumentNullException was unhandled" error It occurs on the line "dbAdapter.Fill(output)" in the sub.
View 5 RepliesAll, I am trying to have my program self terminate, (the equivalent to clicking the X close program). I want my 2010 program to run and then stop.
I have tried the me.close() but I get the error:ObjectDisposedException was unhandled
The code works fine, and I do get the file created, but.... I get the error.
Here is my short
Public Class Form1
Public Sub New()
Dim buffer1 As String
[Code]......
I am getting a NullReferenceException was unhandled error when i run my debugging in this part of my code: Dim x As Integer = Val(index.Chars(0))
what can i do so this will stop and my program will work?
im am trying out this code but it keeps giving an error msg but i cant see where the error is...
query = New OleDbCommand("INSERT INTO studenttable(sname,scourse,syear,ssemestor,sgrade)values('" & TextBox1.Text & " ',' " & TextBox2.Text & " ',' " & TextBox3.Text & " ',' " & TextBox4.Text & " ',' " & TextBox5.Text & " )", con)
con.Open()
query.ExecuteNonQuery()
con.Close()
I have some trouble in SMS gateway project using VB.Net (VS 2010)while programme was running, I found error "InvalidCastException was Unhandled", then my programme cannot continue. below I copy the code of the programme :
----------------------------------------------------------------------------------------------------------------------
Option Explicit On
Public Class MessageReceiver
Private TPMessageTime As String
[code]....
When editing my DGV (SSN number 123-12-0000 to 123-12-1000), I am getting an error.
Unable to cast object of type 'System.Windows.Forms.DataGridViewTextBoxCell' to type 'System.Windows.Forms.DataGridViewCheckBoxCell'.
in the following code
Private Sub dgvResults_CellValueChanged(ByVal sender As Object, ByVal e As DataGridViewCellEventArgs)
If (Not IsHeaderCheckBoxClicked) Then
RowCheckBoxClick(DirectCast(dgvResults(e.ColumnIndex, e.RowIndex), DataGridViewCheckBoxCell))
End If
End Sub
It happens after I press enter or move focus to another column. Any idea why this is happening?
Here iam trying to insert some values to SQLServer 2005 Database.The following error displaying.I changed the corresponding column size,still the error persists.how can i sove this error-:
'String or binary data would be truncated. The statement has been terminated'
iam trying to insert some values to SQLServer 2005 Database.The following error displaying.I changed the corresponding column size,still the error persists.how can i sove this error-:
View 4 RepliesI'm trying to call a C++-compiled DLL from VB.net and I'm running into some problems. Seems like there's an obvious solution, but I can't figure it out.Here is the function declaration in C++:
MyFunction(int trailingaveragesize, double sigmasize, int myflag, int sizeSeries, double *Xdata, double *Ydata, int sizeinputparameter, int *averagePairs, double *PositionsSize, double *PnLSize)
Here is how I'm calling it in VB.Net:
[Code]...
i debug my code it says that i have a syntax error in Insert into statement and it highlights the
da.Update(ds,"MovieData") command ?? Why isn't this working?
[Code]...
I have the follwing codewhich transfer the value from NumericUpDown64 to the array Conc(0,0) which is part of the structure USerInput:
UserInput.Conc(0, 0) = NumericUpDown64.Value
When I run the program I recieve the NullReferenceException was unhandled. Object reference not set to an instance of an object.