i read that WindowsFormsApplicationBase, is in the Microsoft.VisualBasic.ApplicationServices namespace
Do I have to really add the full-blown Microsoft.VisualBasic.ApplicationServices just to get WindowsFormsApplicationBase in c# ? What's the consequence on the size and performance of my c# app if I do so ?
I want the oppisite of
If My.Computer.FileSystem.FileExists() Then
end if
I have a Windows Form in which I started two threads and then close the form and threads continue their works. How can I abort first thread when the second thread stops?I made the first thread IsBackground,but the second thread is not the only thread of program and the first thread is started in another thread(form) that is closed and not exists anymore,in addition I can't set Flag of a Class that doesn't exist.
View 3 RepliesI have been trying to build the "Testing a class lesson, but the Set as StartUp Project line in the Project menu does not exist! I have redone the entire project 7 times, always the same response! # different computers, all with registered versions of VB. Why does this problem persist?
View 8 RepliesIt was there in VB 6. I have some images that I'm going to use a buttons, and I did this in VB 6 with the image control. however, this control doesn't appear to exist in VB.NET 2008 Express. I guess I could use a picture box, but isn't that overkill for such a simple task?
View 3 Replieswhen people first run my program (as in the FIRST EVER time they run it), I want a window to popup (Form4). In this Form you have to locate a directory to a certain program (my program uses this program) and press OK, and then that will generate a .txt file with the directory to the program. (So that my program knows where that program is located.) Now, what I want it to do is when you open up the program, upon load (Form1), I want the program to check if that text file (directory.txt) exists. If it does and the path in the file is correct, the program will run fine. If the text file is missing and/or the directory doesn't exist, it will bring you back to Form4 (assuming that this is your first time running the program since the directory.txt file doesn't exist).
View 5 RepliesI want a message box to show when a username doesn't exist. I figured this would work but an error shows saying 'FileNotFoundException was Unhandled', for the fist line.
Dim UserFile As New System.IO.StreamReader(sPath & "" & UsernameBox.Text & ".txt")
Username = UserFile.ReadLine
Password = UserFile.ReadLine
[Code].....
I'm trying to use a single event handler for several controls in an ASP.NET web page. I would like to add the event handler at runtime if and only if it doesn't already exist. In C#, I would write it as seen below:
if (myTextBox.OnTextChanged == null) myTextBox.OnTextChanged += DoTextChangingValidation;
Likewise, I know I can remove the event handler as follows:
if (myTextBox.OnTextChanged != null) myTextBox.OnTextChanged -= DoTextChangingValidation;
[code].....
I am trying to add a registry key in to the file "MyApp" which doesn't yet exist in the registry key directory, when I try and write this key however I get an error from the debug console telling me the "NullReference was unhanded". If I go and manually make this folder it works brilliantly, I thought that this code would make the folder as well?
[Code]...
What i need is, if a item in a listbox Doesn't exist, it needs to remove it from the other.
In the pic i have attached. Basically If it doesn't exist in Listbox2 then it needs to be removed from Listbox1 and tell the user which one has been removed.
i.e Test 02 doesn't exist. So messagebox would show "test02 has been removed" then remove it from listbox 1
It probably something simple thats sitting in the back of my mind, but for the life of me can't figure it out lol
I'm copying code from one VB project to another PC but the 'datagrid' on the copy insn't inserting into the new PC. When the form loads the datagrid is missing. The error I got was that there was something missing from the machine. When I tried to add the datagrid using the 'Additional Controls' it doesn't seem to exist. Any chance I can download the control? The version of VB is 6.5 and its part of a graphics package I'm using.
View 2 RepliesMine is a simple conexion problem but I dont understands what's happening I have another form in the same project which has no problems at all, I desided to create a form to use it as a base form named plantillav only to duplicate forms and intance the others from that one I put it's Modifiers Property = Protected in ortder to modify property values in the other ones I don't know if the process generated a failure.
I created the following strconn:
Public
Class
clientesc
[CODE]...
This table was exported from phpmyadmin (wamp) so it means is created and even with registers inserted directly from console, the problem is when I send from the application, with the following error that indicates that the name of the field doesn't exist or is not well written; Unknown column 'code_empleado' in 'field list'.
In this code block, the datarow gets the row number of the username that was used to log into the system with, right? And in this code, if there is a username/password that was matched with in the database, it'd place it on the dbUsername/dbPassword variables and compare it with the ones that were inputted by the user.What if I wanted to know if there is none of that username (like, username doesn't exist from the database)? I tried inputting login info that doesn't exist in the database and it resulted into the following error:An unhandled exception of type 'System.IndexOutOfRangeException' occurred in system.data.dll
[Code]...
I am trying to import a flush component in a Form but in Choose Items... in the list of Com Component, Shockwave Flash Object deos not exist.
View 2 RepliesIm developing a program that adds any number of tabs for each directory that contains user specified information and also adds a list view control on each tab that shows the files contained in said directories. I want the user to be able to double click a file in the list view(s) to open it.
View 2 Repliesim trying to generate an error message to the user to let them know a file doesnt exist.So far ive got the user to enter the file name into a textbox, they click search and if successful will load a new form with a PDF file reader built in( AxAcroPDF1 )everytime i enter the right file name i get the file loaded, if enter the wrong name the File page still loads with no pdf and no message saying file doesnt exist.
Private
Sub PictureBox1_Click(ByVal
sender As System.Object,
ByVal e
[code]....
I have recently published a simple text editor(just as an exercise). the editor has been published using Microsoft Visual Basic Express. Once the program is installed i wanted to make it a default opener for .txt files, so i clicked openwith ->Choose default program and then i was asked to show the location of the .exe. It seems like the .exe of my installed program doesn't exist. where the .exe is on a windows7 or tell me of another way of makeing that program the default opener.
Here is the link to the publish page: [URL]
I have got some code that is working as i have edited the game.exe at a certain address, now i know the code can find the address, but I don't know how to make it stop searching for it if it isn't there.
here is the:
code:
So what I want to know, is how to stop this code, if the address doesn't exist.
VB.net application crashes without specific error
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.
[CODE]..........................
Along with this.
[CODE]......................
This application required .Net framework 4 & Oracle 9 ODBC drivers, which I installed on new PC.
I am not able to figure out what is the problem exactly, however it seems something with .Net framework itself.
I am looking how to set events to a webrowser which is being created by the following:
[Code]...
I try to find online any example for create an application autoupdate.
When I run my application it check in a webserver if exist new version,if exist the software run update.
namespace of "system.runtime.caching" does not exist but in object explorer and microsof exist.i use microsoft visual studio 2010 and .net framework 4.0.i also cant use this name space(System.IO.MemoryMappedFiles & System.Runtime.Caching.MemoryCache)
any body know what is the problem. i want my program after doing something (opening a file or any thing that can do something my program use more memory.)use memory like startup run.
Here's my code:
Option Infer Off
Option Explicit On
Option Strict On
Public Class Form1
Public Sub NewToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles NewToolStripMenuItem.Click
[Code]...
I have Requests for VB(2005) very very important for my selly project!i need a button that determine if file exist and if that file exist then show a messagebox!and if not show messagebox!.
View 2 RepliesI want a Code to check Database exist in SQL and Message Box Show Database Exist Yes/NO?
View 1 RepliesI'm just starting out learning C# this may be really simple but in VB i have these namespaces
<%@ import Namespace="System.Data" %>
<%@ import Namespace="System.Globalization" %>
<%@ import Namespace="System.Data.SqlClient" %>
How do I go about using those namespaces in C#?
I tried
namespace System.Data
and
using System.Data
but they didn't work
In C#, if you do this, it will compile:
namespace Name
{
public class Test
{
[code]....
I get (depending on the way I try to use "Test") either "'Name' is not a member of '<Default>'." or "Type 'Name.Test' is not defined." in my error list. I've found two ways to make it work, but neither are reasonable to expect of a user. One is to remove the "Root Namespace" from the project properties. The other is to include that namespace between "Global" and "Name".
I have made a custom tool that uses CodeDom to generate code for both C# and VB.NET. This is the reason why neither of the two fixes above are feasible: I can't expect my users to have an empty root namespace, and I'd hate to have to do VB-specific tricks in my code generation (kind of defeats the purpose of using a language-neutral tool, doesn't it?) such as picking out the "Root Namespace" (not that I'd know how off the top of my head) and including it in my code generation.
I don't want to leave out the global modifier either, because it protects the tool from users picking bad names for the generated output. Does anybody have a suggestion for how I should deal with this?
Is something like this possible?
Namespace Transaction, Document
Class Signer
Public Sub New()
[Code].....
I basically want to be able to instantiate the Signer class from either Namespace. The reason is that I mistakenly set it up in the Transaction class and need to migrate it over to the Document class without breaking existing legacy code. I'd prefer to not have the same Signer class duplicated in both Namespaces if possible.
I am building an ASP.Net application and want to use Namespaces for the first time. Within an App_Code folder, I have created three classes called RewriteContext, RewriteModule, and RewriteHandler.
[Code]...
I am using XML Literals and Linq to XML to read/write data to an external system.[code]The client now wants to put the url in a parameter table so the table can change to point to a test server or a real server. I assume that I cannot put a variable in my Imports statement.So how to I access the correct URL from a variable?url...
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