When I make an application using an HTTPWebRequest to connect to the internet, the GUI freezes whenever it's doing something. When I run the WebRequest on another thread, it still freezes a bit. Is there a way to completely stop the freezing?
I have VS 2008 and am working in VB.Net forms.I have a webbrowser control where I am trying to control input fields that are dynamically created. If a text field has proper handles such as id and name tags there aren't any problems.
For example, I am trying to work with twitter for posts. I know twitter has an API but I want to work with many similar systems and want to avoid the API as its case specific and I want to scale things within the VB.Net form. The login fields for twitter are easily handled, however the posting field once your logged in is just a text area with a class. There is a tagname but I have been unable to post using the tagname element.Any examples of posting to twitter without the API ?
I have a connection string set up and a data reader.I have two textboxes on my form for users to type in. One textbox (txtLogin) is a user name and the other textbox is a password (txtPwd). I'm trying to compare what a user types into those two boxes to a table in a vfp database. The table I'm trying to compare to is open about 99% of the time so I need to be able to read from it in some type of "shared" mode.
My Select statement needs to be something similar to "select * from sites where clogin = txtLogin.text and cpassword = txtPwd.text"I just don't know how to get this to work properly.
i saw jim example in the codebank and i added the percent progress parameter to report progress method (to change the progress bar value)this is jim example:-
vb.net Private Sub BackgroundWorker1_DoWork(ByVal sender As Object, _ ByVal e As DoWorkEventArgs) Handles BackgroundWorker1.DoWork
I am trying to find information on code to make the lines of a jpg file that have been loaded into a VB.NET WebBrowser control into selectable objects.
I have no idea what to search for or the correct terminology.
This is very similar to using the line tool in word or excel, after you draw a line you are able to select it.
Been trying to make my .net prog connect to an access database. I cant figure out why I keep getting this generic error message. A first chance exception of type 'System.Data.OleDb.OleDbException' occurred in System.Data.dll Heres my code.This is my class to create the connection to the database:
I have a user control that inherits the FW ListView and I need to dispose of two objects when the form's disposing of it's objects. Here's what I've concluded already, am I on the right track?
If I have a large number of classes, each similar to the other in certain aspects (they all share a common base class, but each does things differently), and I need to create Windows forms for each to allow easy changing of their values through a GUI? Create one matching form for each object in VS' forms designer, Or Use code to create the forms dynamically at runtime.
#2 makes the most sense to me, because a lot of these objects will share very common features of the form, notably "Ok" and "Cancel" buttons. But one object might need to draw a textbox on the form while another might need to draw a combobox. Not to mention, if I want to put icons on the "Ok" and "Cancel" buttons, I'd have to do this for each copy of the form in designer, and that sounds like it could get out of hand quickly.But is drawing forms through code sane? VS' forms designer is pretty sophisticated and designed to make life easier. Am I wise to consider ignoring its functionality and diving into the trench warfare of forms design through code? Or are there examples of automating form creation based on an existing object's properties?
I've got a data entry form with 3 date fields which can be null.When I open up the form the fields display as today's date when the value is null.I want to be able to display to the user that the value is null and not some spurious or misleading value.Any ideas on how I can do this?
Have anyone developed a textbox where it is possible to display 2 fields in the textbox. We want to be able to show ID + description in the same textbox. (When user enter the textbox description may go away and the user can enter an ID)
I have noticed that whilst in the past using MS Access you could have a primary key field on a form and have it not visible. You could still use it for Dlookups etc using the value in the field no problem even though it is not visible. In Vb if i hide a textbox that is bound to a PK field in a datasource and try to use its value in code i get an error. Making the field visible again prevents the error. My goal is to use a PK bound textbox not visible to the user but still read its contents.
Also, what is the equivalent of a simple DLOOKUP in VS2010? EG. You have the PK and want to know, say 3 other pieces of information from the record based upon the PK you have.
I have VS 2008 and am working in VB.Net forms.I have a webbrowser control where I am trying to control input fields that are dynamically created. If a text field has proper handles such as id and name tags there aren't any problems.For example, I am trying to work with twitter for posts. I know twitter has an API but I want to work with many similar systems and want to avoid the API as its case specific and I want to scale things within the VB.Net form. The login fields for twitter are easily handled, however the posting field once your logged in is just a text area with a class. There is a tagname but I have been unable to post using the tagname element.
I have a complete ms access system build(tables, forms, reports, query). I am in the process of using vb to re-create the system. I managed to show every fields on my vb forms without any coding. However I have some wrong information in my combo boxes. For example I will have repetition(duration, ie 3 months is showing 5 times). Also when I use the arrows only three records are showing. It says 104 records and only shows 1-3. I have also checked all the data in vb that has been transfered from access and it is all similar, ni repetition.
I'm working on a pretty simple project, just a WebBrowser app which is tailored for Webmail. I'm working on an OWA portion, and OWA normally doesn't allow the textfields on the Login page to be auto-filled. Is there a way I can force this? Search through the OWA login page code, find the fields, then fill in the fields with preset/saved data?
I have used CSV files before for a simple database of about 12,000 items - this was a simple one page form... Now I want to have the same database but with the data available to multiple forms at the same time.. eg.. Form 1 displaying persons 1,2,3,5,7 name, addy, phone etc and form 2 pulling info for persons 2,3,4,8... Is this possible with CSV files?? or even XML?... The only other thing is that I do it all in .NET 2.0....
In my first attempt to create a Class that contains something useful (if you will), I am a little lost what a sound way to proceed is. I am trying to make a table that has fields and records. Perhaps imagine a tiny spreadsheet. So, I create my Class. Properties might include the number of columns, the column titles, and the number of rows or records. I then think the thing to do is create a couple of structures to be used within the class. Thus far I have this:
Imports System.Console Public Class ConsoleTable Property NumberofCOlumns As Int32
[Code]....
Problems I am creating in my mind include:
1) In the Field Structure, could I make the FieldValue so that I can change the data type? Meaning sometimes I want an instance of a Field to hold a string,or an integer, or a decimal.
2) In the Record structure, for any given instance of one I don't know the number of fields it will hold until I create the new instance. I tried Public RecordFields(FieldCount) As Field in the Structure, but that's not allowed. I then used Public RecordFields() As Field, and then in my code used the ReDim method. Is there a better way?
3) With the Table Class, same problem. The number of records within any instance of the class needs to be dynamic.
In form frmAddPlayers I declare and create an array of pictureboxes in the Load event using the code:
Dim pbxPlayerJoined(7) As PictureBox
[code]....
In the watch window the value of the pictureboxes is System.Windows.Forms.PictureBox. Later in the load event I start a background worker in form sfrmUSBDevice using the code:
sfrmUSBDevice.sReadWriteThread.RunWorkerAsync()
The background worker waits for user input and then calls a subroutine from form frmAddPlayers. The subroutine changes the image in the picturebox to indicate that the user input has taken place. However when the debugger returns from sfrmUSBDevice to frmAddPlayers the watch window shows that all of the pictureboxes have a value of nothing. Then when I try to change the image of the picturebox I get an "Object reference not set to an instance of an object" exception. It seems like when the debugger goes to the sfrmUSBDevice form and comes back to frmAddPlayers the objects on frmAddPlayers have lost their information.
I'm translating a document management application from vb6. I want to program with good habits and technique, so I'm asking for your opinion really rather than just a solution.I have a decent understanding of OOP, but I'm not very experienced in VB at all. What I'm doing now is trying to figure out the best way to pass objects between forms.For example, in my initialization form, I have an object that stores a group of database connections. I need to pass this object around because reconnecting takes a significant amount of time. There are other objects such as user info and permissions.
Public Class Form 1 Dim DB = New DBobject Public Sub Form1_Load
I caused the VB.NET2008 IDE to do something extremely odd and unintentional with some code I was writing. As some of you know, I mostly write programs for industrial equipment. On one of our products, I needed to make certain forms automatically close after a timeout period. To do this, I began programming a usercontrol with a Timer on it (interval = 1000) and a ProgressBar. Timer.Enabled was set to the Enabled event so I could toggle it. When the control counted to it's timeout period, it would call Me.ParentForm.Close
So I build my project, and drop it on a form in the IDE and I see it begins counting! Huh... I had no idea timers were active in the IDE. I wonder what happens when it hit's it's trigger? I figure probably nothing since Me.ParentForm was actually the designer. When it triggered, the whole IDE crashes without save. I tried it twice now. Here's my
I'm new to the forum and very new to visual basic, and my knowledge base and experience with visual basic is very limited. I'm taking a class and working on my final project. For this project I am to create several forms such as a form where the end user would select a general item types to buy such as a shirt of running shoes, on the next form they would choose a specific shirt or running shoe, and the last form would be a totals form where there is to be sales tax added to each item purchased on the previous screens. The following are my issues:
-Should I keep all the forms under one Project with one Solution page i.e. all encompassed under the one overall project design titled something like Running Store Project, if so how can I add an additional forms to an existing project? Or should I start a new Project w/a new Solutions page for each individual form and then link them together in some fashion? I know just a little tiny bit of what I should do when linking the forms together, I believe I need to choose true or false under view in the properties window, but I don't remember where that is on the properties page and don't know if that is actually correct.
-Also, (and this question might be taken care of w/the previous question), how can I get the taxation amount to be coded for each item purchased? Is there a way to link up the controls in one form to the controls in another form? I assume there has to be a way to do this or it wouldn't make any sense, the info labeled in the controls must be able to flow from one form to another or this wouldn't work anywhere.
So, as you can tell I'm pretty lost on this whole thing, and on this assignment my instructor has asked that no one ask him any questions, unfortunately this is the first assignment where it has been necessary to link individual forms together. I have about 3wks to complete this project and am trying to get it started early enough that it won't be too stressful to complete.
I have 2 forms (Form1, Form2). Form1 seems to recognize Form2 with no additional coding. From Form1 I can load a Combo Box in Form2 with a button and this code;
Form2.CBequations.Items.Add(txtVariable.Text)
txtVariable being a textbox in Form1 and CBequations being the combobox in Form2.But from Form2 I cannot do the same to Form1. It says "Name 'Form1' is not declared." Form2 doesn't recognize Form1 orany of the objects on Form1.
Currently my program randomly removes words from a set of text and inserts textboxes below the text. The user can then enter his/her answers in the new textboxes. What I would like to do is set the program so the user can have two choices one being Easy and other being Advanced. Then when the user hits either button it brings up everything that is currently on the form. I'd prefer to do this without having to use MDI forms. I've had a hard time using the MDI forms and therefore would like to avoid using them. They way I was thinking this could work is all objects would remain invisible except for the 2 buttons and then when you hit one of them they disappear and everything else appears.
I need to dynamically access a bindingnavigator, is this possible? I basically want to have code in my Base form which enables or disables it's descendant's menu buttons depending on access rights.
Can you look at this code? It's a class module that I made so I can make our application more modular.
In the code there are 3 lines of code which have this as part of it: FormBrowseAttendance.ComboBoxLookupStudent.how I can change the coding to refer to this portion of code using these parameters:
pComboBoxName pNameOfForm
I'm assuming these need to converted is some way but I don't know how to do it.
i created a class i invoke the class as object in vb.forms i want bind object(parameters) to datagrid when return as arraylist from methods in form_load. i want to bind arraylist to datagird in form_load.it will bind, the grid show all the parameter from arraylist.but i want few columns to bind from arrylist.here arraylist is convert from list from method.
