Im 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 RepliesI'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 RepliesI 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.
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.
"add controls at runtime" how to add code to the controls. kinda useless with no code, ehh? all results only told me how to add the control, that's it. well, this result is different. i will teach you firstly how to add controls at runtime, then how to apply code to them at runtime
Firstly, add the controls:
[CODE]..............
Now run it. do you have a button on the form? if yes, excellent. if not, you made a mistake. try again now how to add code? you may have noticed that when you double click on any control, it says private sub button1_click(blah, blah, blah) Handles button1.click where it says handles button1.click is what determines when the code executes under what event for what control (in this case the click event for the button1). this won't work when adding code at runtime. did you notice in the above example i added a with event, and addHandler? this is what creates the handler (same as Handles button1.click)
Now we add the code for the runtime control
[CODE].........
Above, the addressOf button1_click tells the program to execute the sub button1_click when the button is clicked on (as determined by .click) but i know what you're thinking! your thinking "why would we even BOTHER doing this at runtime? isn't it easier to do it at design-time in the first place?" yes it is, providing your not writing a plugin. plugins are code based, not GUI (also reffered to as WYSIWYG). to update existing forms using plugins, you need to use this method.
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 Repliesi 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 ?
It 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 want a Code to check Database exist in SQL and Message Box Show Database Exist Yes/NO?
View 1 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 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 want to change the font on a button to bold after certain conditions exist during runtime.
I tried
Col1Button.Font.Bold =
True
The autocomplete allows me to type it, but it doesn't work. There is an underline under the IDE code. Font is apparently a "Read-Only"property. Is there a way to make it a changable property?
I am rather irritated at this. I have no clue why looping through controls on a form and in groupboxes leaves out 75% of the controls.
Here's the code I have:
Dim settings As String = ""
Dim gbControl As Control
Dim gbbox As Control
[Code]....
I want to have setting save all settings to an ini file, and not have to reprogram the saving routine when I add a group box or control. At random times, any number of controls can be disabled, checkboxes can be checked and unchecked, radiobuttons can be checked and unchecked. Regardless of the state of the control, I want the control to show up in the loop. But they don't. Only controls that are enabled and only checkboxes that are checked, every other control state is ignored. That's crap, and is definitely not what is needed by any programmer of any type. We're capable of determining if a control is enabled, hidden, checked, visible, and otherwise.
How do I get the controls to be included in the loop regardless of their state?
I am trying to dynamically add some css and js elements into an ASP.Net page at runtime, but because this code is used in mutliple controls I need to ensure that the relevant links are only injected once.
Currently I have the folowing code in the OnPreRender event.
Dim head As HtmlControls.HtmlHead = Me.Parent.Page.Header
If Not _useCustomStyles Then
Dim litCustomCss As New LiteralControl("<link rel=" & Chr(34) & "stylesheet" &
[Code]....
Does .Contains look for this instance of an object (which I assume is why this is failing)?
Is there a way to check the controls collection for a specific id? Or am I going to have to write a sub to loop through the existing controls in the collection checking for the id.
I created a row (header row) in a gridview with a dropdownlist among other input controls. I also put a button on that row (fltbttn-see below).I created an addhandler for the button called fltbttn_Click.I want gain access to my dropdownlist(ddlscantype) using findcontrol but how can I get to the header row where the filter controls exist?[code]......
View 2 Repliesthis is my code:
Dim WB As WebBrowser
WB = GetPage("http://speed.travian.ir/a2b.php?z=" + VillageID.ToString + "&c=" + Type.ToString + "&" + AttackParams)
[code].....
I am looking how to set events to a webrowser which is being created by the following:
[Code]...
If I have the following code I expect to see FF and AA in a Realterm capture window.Instead I get C3 BF.why I cannot output data on a comport and expect to see the same data captured?
Dim aChars() As Char
ReDim aChars(1)
aChars(0) = Chr(255)[code]......
I want to make my save button save the contents of the text box on the selected tabpage to the open text file. I cannot think of how to do this, as the tabpages are created at runtime, and so do not have a global name. The write function is here (the ??????? is what I am unsure):
Private Sub SaveToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SaveToolStripMenuItem.Click
Dim fileWriter As StreamWriter
[Code].....
For some reasons that I don't understand all my design changes won't show up when I hit F5 and run the application. I can put how many new fields and labels with som "hello" text that I wont but they are not displayed at runtime. But all database changes the report i connected to will be displayed.
How can that be? What is wrong with my report when all datachanges runs thru but not my design changes?
I am using VS 2008 and the built in crystal report and viewer.
[Code]...