Now I have created this order form but when I click on the ADD button nothing happens. I expect when I click on the item automatically the data is added to my database. i am using SQL Server 2005
View 5 RepliesNow I have created this order form but when I click on the ADD button nothing happens. I expect when I click on the item automatically the data is added to my database. i am using SQL Server 2005
View 1 Repliescreating single instance form in MDI Application. How to check whether form's instance created or not?
View 6 RepliesI have a form with a button. I want the button to show a new instance of the same form but I don't know what to do. I'm working in vb.net 2010
View 3 RepliesI have used this form to add new records on my database(ms access) in my database I have a column name 'ID' which is my primary key 'ID' is set as auto number. Now I am having a trouble on creating my update and delete button it's always saying "cannot be delete/update"
Here's my code on add, update and delete
Public Sub SaveRecord()
Try
Dim dbConn As OleDbConnection
Dim dbInsert As New OleDbCommand
Dim str1, str2, str3, str4, str5, str6, str7, str8, str9 As String
[Code] .....
Note my add is working perfectly fine. I just can find the error on my delete and update. Also I have used this to view it to my datagrid I don't know if its the right thing but it's working fine too.
'declared dbpath globally'
Dim dbPath As String = "Provider=Microsoft.Jet.Oledb.4.0; Data Source=../VG.mdb;Persist Security Info=False"
[Code] .....
Another thing is how to code each textbox and combobox to bind it to my records so that when I click on the datagridview each column will be distributed on each respective textbox.
I have a strange problem with creating an instance of a form which I want to use as a custom message box.
The idea is that when the user clicks the button to perform a database search, an instance of this form is loaded. The background image of the form never displays but the text on the form does - but it all works fine when I remove the call to the database.
I also tried putting a "proper" VB message box just before the database call and when I block it this way it seems to allow the image to draw on the form.I also tried using a timer delay before the database call - just a couple of seconds to see if that would allow it time to draw the image.
[Code]...
I'm having this problem with my code and cannot seem to get past it although it was working fine before. The error is "An error occurred creating the form. See Exception.InnerException for details. The error is: Object reference not set to an instance of an object." The code is:
CODE:
I am trying to get information to be pulled out of a database and show in text boxes on another form (frmviewsdets). The error occurs when it gets to the line frmviewsdets.txtsnumber.Text = rdr("StudentNumber") and even when a breakpoint is applied there it just moves on to the next and so on.
I have tried to show frmviewsdets before I pull the data out of the database beut I get the same message.
i want to know how to create a log in form using a database..i've watched some videos but its failed.im using visual basic 2008 and access database 2003...i have created a table for password..
View 9 RepliesWTF, here's my code...
Public Class Form1
Dim BIT01 As Integer = BIT_01.Text
Dim Value As Integer = TB_OutPut.Text
[code].....
I'm new to databasing. How do you make it so you can add an item to a database on a form, Then follow a link to another form which has the database on, then what you put in on the previous form will be there?
How's it done? Sorry - Haven't been using VB very long >.<
I'm really new to any form of VB programming and I am trying to create a form which will allow me to take information from an attached database holding information on:
class names (i.e. Year6 Dragons)
Students names (i.e. Sarah Jessica Parker)
I want the design to look very similar to the form used in MS Access for the query wizard, which will allow me to choose a class and then specific students.
I am creating a program for an existing database that stores the info into the database. So can I link an already existing database in MS Access to a GUI?
View 2 RepliesSuppose a click event is fired and a particular gridview datasource is set in the code behind page by retrieving a data table from a business logic class.
So programmatically speaking, what is the main difference between the two set of code listed below.
Private Sub btnGetGridViewData_Click(ByVal sender As Object, ByVal e As EventArgs)
Dim myBLL as New BusinessLogicClass
[code]....
I guess my main question is, what is the purpose of creating a new instance of an object in the above scenario?
I am converting C# to VB right now
in VB, I have these codes :
Dim ind As Foo.Index
Dim ed As Foo.Edit
ind = New Foo.Index
[Code]....
Seems I do need to show all the codes. But I need to talk directly to you as well (or You just install the software of mine).
My project is done on vb,net& sql2000 but it is not running and showing error -
" object is not creating an instance " what to do ?
my aim is to create a new instance box at the push of a button, the box has strings name and Id to be filled concatenating the auto generated ID i.e. 0 to 210 plus a string "Box" added by the user. I had problems earlier creating a structure within the class box, frankly I am not sure if the code below will work, as i try to run it in VB I get an error indicating that I am using the variables strBoxPositions() and strBoxNumbers() without assigning a value to it. The thing is the strBoxPositions() should automatically be filled by arrPosition() which will be created at the same time the new object box is created and the strNumbers() will be created with empty strings to be filled at latter stage by the used as and when necessary.
how could I initialise those arrays to get the program to run and perhaps ill be able to see if the code works or not, or just correct this code with a better way of code with comments, also if possible some indication on how could I update the strNumbers array inputing the strings one at a time on a text box field.
Public class form1
Public Class Box
Public intBoxID As Integer
[Code].....
I am getting an error when I run this app in VS 2010 (it works fine in VS 2008)
[Code]...
I would like to create a global instance of a User Class that can be referenced by all the forms in my MDI application.This object may be set during the login procedure by the Login form but the user attributes are to be available for other forms. For example, MyUser.ID will be required for meeting the audit requirements whenever data is changed.
View 14 RepliesVS Express 2010 gives me a "Creating an instance of the COM component with CLSID {D70E31AD-2614-49F2-B0FC-ACA781D81F3E} from the IClassFactory failed due to the following error: 8007000e."
Error at this line
Dim acadDoc As New Autodesk.AutoCAD.Interop.AcadDocument
Here is the method call:
Private Sub Process_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Process.Click
Me.DialogResult = System.Windows.Forms.DialogResult.OK
[Code].....
I have created a multiuser application and at different user login i want to create different instances of the application.How to do this? Can somebody give the concept of how to approach this?
View 14 RepliesVisual Basic Project - Student Check In Form using an Access database backend This form needs to draw information from an Access database containg tables for STUDENT, INSTRUCTOR, and SECTION. These all need to have primary keys and ids. When (the user) clicks on the drop down box that displays all the sections:
{Table Tennis 1, Table Tennis 2, Table Tennis 3, Billiards 1, Billiards 2, Billiards 3}This should populate the listbox or datagrid from the STUDENT table with the Students that have the same SECTIONID as the SECTION selected in the drop down menu above.
After the Student list has been populated (the user) clicks on a student name in the listbox/datagrid and this inserts that student into the CHECKEDIN table that has a datagrid/listbox associated with it.
This is a great project to practice connecting a database to Visual Studio 2008 .net and playing with the data that has been pulled in. You could use SQL instead of Access.
I am creating an excel file in my vb app. Below is the code I am using to do this. But when the application is closed, I still have an instance of Excel running in the background. How do i close it? I can do it with the xlWBook but not the xlApp.
'create empty excel file
xlApp = CType(CreateObject("Excel.Application"), Microsoft.Office.Interop.Excel.Application)
[Code].....
In my VB .Net code, I am trying to create to launch MS Project Application. Dim prjApp As Microsoft.Office.Interop.MSProject.Application = New Microsoft.Office.Interop.MSProject.Application
But I am getting the exception as follows:
"Creating an instance of the COM component with CSSID {36D27C48-A1E8-11D3-BA55-00C04F72F325} from the
IClassFactory failed due to the following error: 80010001".Note: This exception happens in 64 bit Windows 7 German OS. But the same code runs successfully in 32 bit Win XP (German and English) and 64 bit Windows 7 English OS.I have even tried the following steps in German 64 bit Win 7
1. Running the application in Administrator mode
2. Setting UAC to low.
3. Re-installing MS Project in German 64 bit Win 7.
I am using msn api to read contacts out of msn
Interop.messengerapi.dll
When I run the app on my machine everything works perfect. But when I run it on another machine, the following error appears:
Creating an instance of the COM component with CLSID {B69003B3-C55E-4B48-836C-BC5946FC3B28} from the IClassFactory failed due to the following error: 8007000e.I have merged the interop messenger dll properly with imerge, so that cant be the problem.
Also a memory problem must be out of the question. I only use 300mb from the 4GB. There is also enough disk space available.
My Code:
Private Sub getMSNContacts()
Dim objMSN As New MessengerAPI.Messenger
Dim msncontact As MessengerAPI.IMessengerContact
Dim msncontacts As MessengerAPI.IMessengerContacts = objMSN.MyContacts
For Each msncontact In msncontacts
ListBox1.Items.Add(msncontact.SigninName)
Next
MsgBox("getMSNContacts")
End Sub
In VB.net we are creating different namespace level classes. For Example,DynamicPDF - Root NameSpaceTest ,Report are two sub folders in side the sub folders some classes.
1) DynamicPDF.Test.ClassA
2) DynamicPDF.Test.Report.ClassB
using the VB.NET i was generated the Tlb file.
[code]....
I have a class structure and am attempting to create an array of object instances from the class some instances are parents and some are children Code snippets,
Parent Class object
Option Strict On
Option Explicit On
Public Class cTransportItem
[code]....
I'm writing VB code in Visual Basic 2008 Express and can't seem to figure out how to create a new instance of Excel with VB code. The most common answer appears to be setting an object variable to 'Excel.Application', but that gives an error (Type 'Excel.Application' is not defined).
View 1 RepliesI'm working on and add-in for Word 2003 that creates a custom toolbar when the add-in is loaded. However, most of the users will open documents through a file management system that uses automation to open the documents. I tried using the GetObject function to grab the instance of Word created through the automation but the toolbar isn't made visible (it only sits in the background and the users have to manually make the toolbar visible).
Code:
Public Sub createToolbar()
On Error GoTo ErrorLocator
[code]......
I have two forms , say FormA and FormB..In FormA, a Button Click i wrote FormB.Show.When i click again the button its creating another instance of FormB.i want to make FormB as single instane, if again the button event raised i need to focus the FormB rather creating another instance.
View 2 RepliesI have a form that i want to be saved to my database. The form is adding a new record to my sql server 2005 database but it is not bringing the text over with it. The new record in my db is just an empty row. Here is my code.Add to database section ( i have removed the connectionstring for privacy reasons)
<%@ Page aspcompat="true" Debug="true" %>
<html>
<head>
<title>Form to database</title>
[code]....