VS 2010 Access A Control From The Value Of A String?
May 13, 2012
Lets say I have a combo box that contains the values "alpha", "bravo", "charlie", etc.
When the user selects a value from the combo box, then that value will be written to a string variable, like...
Dim ComboSelection As String = combobox1.SelectedValue
Now, lets say I have a bunch of panels on my form, which have names corresponding to each combo box value. For example...
pnl_alpha
pnl_bravo
pnl_charlie
etc etc.
So what I would like to do is use the value of ComboSelection to access the appropriate panel (instead of using conditional statements or select case statements).
For example, whichever value the user selects from the combo box, I want to change the corresponding panel's background color to blue. So in the combo box's click event, I want to do something like this...
Dim ComboSelection As String = combobox1.SelectedValue
Dim PanelName As String = "pnl_" & ComboSelection
PanelName.BackColor = Color.Blue
Is it possible to do something like this? Again, I realize that I could easily use conditional statements to accomplish this task, but I am curious if it is possible to do it this way instead, as I would have many uses for this functionality.
View 4 Replies
ADVERTISEMENT
Apr 2, 2009
Is it possble in VB.Net to accress a control or object using a built up string?[code]...
View 2 Replies
Aug 21, 2011
I've got a number of buttons in an 8x8 grid named cmd_A1, cmd_A2, etc all the way to cmd_H8.
I want to have a string that contains the name of a particular button, and then use that string to access a particular button.
1) Dim button_string as string = "cmd_A1"
2) Dim current_button as button = [the button named in button_string]
3) current_button.text = "♖"
How do I do step 2?
View 6 Replies
Mar 15, 2011
I want a list of all controlls in my project, not only on open forms. The reason is that i want to make an access control, and the admin will set which buttons each users can use.
What ive got so far is:
HTML
Public Sub getallforms(ByVal sender As Object)
Dim Forms As New List(Of Form)()
Dim formType As Type = Type.GetType("System.Windows.Forms.Form")
[CODE]...
This shows me all forms in project. But i cant access their controls.
View 6 Replies
Sep 8, 2010
win7 64bit, VB express 2010.
I'm working on a project. The main form is a MDI parent, it host a control form. on control form, there is a button. when click it, it will start, say 10, threads.
each thread will open a standard alone form (not mdi). on each form, it has a web browser control. when the form opened, it will start a new thread which makes the web browser control load a url, then depends on the links in that url, it will load another url, and loop for some times. then, the thread stops, and the form closes.
for some reasons, I got this weird exception:
AccessViolationException was unhandled by user code. Attempted to read or write protected memory. This is often an indication that other memory is corrupted.
1) the exception happens randomly, and not always happen. when it happens, it is always some code related with the web browser, i.e.
Not (MDIWebBrowser.ReadyState = WebBrowserReadyState.Complete)
or
MDIWebBrowser.Document.Body.InnerText()
2) I put a try catch in, but, it can not catch this exception. If I just close the exception dialog, sometimes, it keeps running without problems. sometimes, it just pauses the webbrowser control.
so, I did some research. it seems many people had the exact same problem. and it seems the best choice is:
[URL]
I checked all solutions suggested, even manually change the DEP, by using "bcdedit.exe /set {current} nx AlwaysOff"
but, the exception still pops up.
View 1 Replies
Jun 4, 2010
look at this code :
[Code]...
i want to get theButton control name from user in a textbox. it means ... every control name that user enter in textbox, the control backcolor will be change.
View 5 Replies
Jun 17, 2011
I am developing a winform application which targets .NET Framework 4. I would like to get the connection string from the app.conf file but the Imports System.Configuration.ConfigurationManager fails. I can do a Imports System.Configuration but I cannot get to the .ConfigurationManager.
View 7 Replies
Feb 1, 2011
I'm looking to put a few labels on a form but the text that they will display will not be static. Instead they should be dynamic as the values used will be either the value of a specific Environment variable or from a value stored in an array. These values will change depending on which user runs the application. How do I achieve this?
View 2 Replies
Sep 21, 2010
I'm writing a custom control and I want to add a "MessageText" property of type String:
<Browsable(True),
DefaultValue(""),
Category("CustomControls"),
[code]....
The MessageText property is a multiline text, and the user must be able to set the text using the designer. The problem is that the designer doesn't allow to enter a newline directly for a string property.I want the same behaviour as the system TextBox's Text property, where you can click on the down arrow and write lines in the small text-editor that appears:How do I do that?
View 2 Replies
Jun 22, 2010
I got an app, which receives data via a R232 port, convert it to a string and on the other side I got a database, where the strings are saved. How can I find a way to compare the string with all strings in one database column and get back the another stringform the same row in this database. I never programmed a database
View 1 Replies
Sep 9, 2010
I coded a program to access a Microsoft Access 2010 database. The program is written using Microsoft Visual Studio 2010. I get the error message that the database I'm trying to access is in an invalid format. look at the code below to see what I missed. The error is in the datasource statement.
[Code]...
View 6 Replies
Feb 15, 2010
I have been able to associate a listview control with an imageview control to display images. There are a couple of things, I would like to do.
1> How do I display the image in the second column? 2> How do I increase the size of the image getting displayed? My images are all 48 x 48 (pixels), but they keep shrinking.
VB.NET
Option Explicit On
Imports System.IO
[code].....
View 4 Replies
Feb 16, 2011
I'm trying to make a program with transparent labels over pictureboxes and when I set the label Parent to the PictureBox the position of the label changes.
View 2 Replies
Nov 17, 2010
quite new to database queries through VB. I have just created a DB using MS Access and I need to write data to it from my VB Application.Can anyone point me on which objects should I use to execute these write transactions?
View 6 Replies
Jul 23, 2011
I am looking how to set events to a webrowser which is being created by the following:
[Code]...
View 1 Replies
Apr 8, 2011
I'm trying to code a program but this error repeatedly shows up and I can't for the life of me figure it out EValue of type 'String' cannot be converted to 'System.Windows.Forms.TextBox'. It appears in relation to this code
[Code]...
View 8 Replies
Jul 16, 2011
it's just for a program registration. i would store all of the registration codes in the access database, then export it to XML, then upload it to my web host. I would then somehow connect it to my Visual Basics login form (Which I have already made). If this can't be done, having them register through the form and having all the allowed codes on the internet (So i can easily edit them)!
View 5 Replies
Jan 27, 2012
I've built my program a database in Access 2010. Works very nice. But I've had a thought. When my program is compiled and I give it out to users. Will those users need a copy of Microsoft Access to use my program. If so, How could I make it so that no install of Access is needed.
View 3 Replies
Apr 1, 2012
Syntax error (missing operator) in query expression '''system time'''.this is the error that appears
this is my code:
Dim sqlCmd As String
Dim x As Date
x = Format(Now(), "General Date")
[code].....
the fields in the tables are all text fields.is there any way to fix this error? perhaps it is in my query but i really cant find a solution.is there an alternative to get what i want my program to do?it is basically entering an ID number and finding the record with the same idnumber and putting the system time on the timein field for that record.
View 1 Replies
Sep 17, 2011
I programmed an app with an Access 2010 database, I installed the app and the database on a computer with office 2007. The app can't open the database. Do I need to copy some extra file on the user's PC?
View 15 Replies
Feb 22, 2011
I'm developing a TextBox Component that is suited for handling passwords. I was using A string Builder to hold the password But now I discovered the Secure String! It is Perfect for what I want to do except one Problem! How do you get it back to a normal string! I've heard you can convert it to a BSTR and then use windows API to read the memory location and convert that to a string.
View 2 Replies
Apr 28, 2011
I was trying to do a simiple, fine a string start position, or a string, and it always returns 0
Dim My_Search_String As String
Dim My_Text As String
My_Search_String = "fsl fwb fcb"
[code].....
View 4 Replies
Aug 23, 2011
upgrade my DAO code to ADO? The following code worked fine in VB.Net for Interop Access 2007.
View 1 Replies
Jun 2, 2010
I have two controls on one page and need to access another control's values. I believe doing something like me.page .... something along theses lines
View 2 Replies
Jan 17, 2011
I am using Access 2010 and VB in VS2010.I have created a DB and have several tables. 1 table in particular called Employers, has the normal AutoNumber Primary key. Everything in Access runs fine. I used Access to develop a basic model application of the full version I am developing in VS.My VB front end contains a dataset linked to the employers table. I have dragged onto my form the "detail" view of this DataSet, not the DataGridView. The usual controls are in place such as the EmployerBindingSource, EmployerTableAdapter, TableAdapterManager and a EmployerBindingSourceBindingNavigator.On my VB form Scrolling through the record set is fine and all works well.My problem is after I click the "Add" record button on the EmployerBindingSourceBindingNavigator. The form fields go blank as expected awaiting user input. However, the field that is bound to the employer_id field (the Employer table's primary key) shows a value of -1.The insert command works no problem, and having looked at the database the table contains the new record with a correctly incremented PK
[Code]...
View 4 Replies
Mar 9, 2010
Where is httpUtility.UrlEncode in 2010?? From what I read in the forum I need to add a ref to System.Web. But I only see references to System.Web.Application.Services and System.Web.Services, which don't resolve the problem.
View 1 Replies
Mar 2, 2011
I'm trying to create an application using VB 2010 and an MS Access 2007 database. I've been googling around but was unable to find something focused on this matter.
View 3 Replies
Apr 27, 2011
In my application, users can establish connections to one or more databases in order to pull in data, thus a read-only connection is sufficient. I use the following connection string syntax when connecting to an Excel 2010 database:
[Code]...
View 1 Replies
Apr 8, 2010
I've been working on an app for quite awhile and now am at the point where I have to incorporate an Access DB. Tried many things/variations of what I've found...but now am stuck. So here goes:
I have a Form with this
Public Class Form1
Dim objConnection As New OleDbConnection _
("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|Test.mdb")
[Code].....
View 11 Replies
Jun 23, 2010
Is there anyway that I can access all the properties of a control during runtime and
get their values. I dont want to specify the property name. I should get the all the
property names and their values. It is something like reflection namespace in VB.NEt
View 1 Replies