Looping Through Each Control On Winform
Feb 11, 2012
I have a winform and i have about 30 labels and 30 picture boxes on it. What i would like to do is fill each label and picturebox with a value and image from a backend database. I could have easily done this in vb6 using control struture , for eg.
for x = 1 to 30
picturebox(x).image = value from database
label(x).caption = value from database
next x
Is there something similar i can do in vb.net. I search a lot but found only complex programs difficult to understand and too much of OOP.
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Jun 7, 2011
I have a blank winform. A textbox control with name textbox1 being added to the winform. During the form load event, I retrieve 2 string values from database and store these values into TextboxName and TextboxValue variables of string type.
I use TextboxName variable to store that textbox control name (i.e. currently TextboxName = "textbox1") and TextboxValue variable to store that textbox's text (i.e. currently TextboxValue = "Hello world"). My question is how to set the textbox1.text property without have to resort to following code:
If TextboxName = "textbox1" Then
textbox1.Text = TextboxValue
End If
how to set the textbox1.Text property without have to use IF...Then construct?
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Jul 1, 2009
I have been working on keeping things object oriented for my project. Currently, I'm using a .DLL which supplies all of the app's classes to the WinForms project acting as the presentation layer.My .DLL will, for example, return a SortableBindingList(Of T) to code in a form. The SortableBindingList(Of T) comes from here. Let's assume a SortableBindingList(Of Product). Assuming that the .DLL's function Services.Products.GetList() returns a SortableBindingList(Of Product), I can easily do this:
DataGridView1.DataSource = Services.Products.GetList()
Now, the DataGridView is properly populated with my list of Products. Fine. However, there is no .SelectedItem property which gives me back my object which was selected in the DataGridView:
' Doesn't exist!
Dim p As Product = DataGridView1.SelectedItem
' Need to make another DB call by getting the Product ID
' from the proper Cell of the DataGridView ... yuck!
However, a ComboBox or a ListBox does in fact store and return my Product objects intact:
' Valid!
ComboBox1.DataSource = Services.Products.GetList()
Dim p as Product = ComboBox1.SelectedItem
Another however ... the ComboBox and ListBox do not show all of the fields of the Product object, only the value of the DisplayMember property.Is there a nice control in VB.NET 2008 that I am just missing, which gives me the object oriented functionality that I want which will actually display an entire object's fields and also return that object back when selected by the user?
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Apr 29, 2010
Visual Studio 2008 service pack 1 comes with Visual Basic Powerpack and has DataRepeatr control. i want to know that how I can add data in this control. i have in memory data. the examples i found on net are about binding DataSet to DataRepeater by fetching data from database. i want to bind in memory data. how to do this.
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Jan 25, 2011
[Code]....
When I enter values in the textboxes and then press a button (=leave the edit) I find that table (myDataSet.Table(0)) contains all the values I entered besides for the last control/textbox that I was in.
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Apr 11, 2010
I have a Winform UC packed in a CAB and hosted in an aspx web page using the <object> tag. In IE7, things work. But in IE8, no matter what settings I choose, the control never gets installed. I need to point IE8 to the CAB, download it, unpack it, and run the installer in the client machine, outside IE8. The UC is fairly complex, and requires several DLLs (third party components). The control reads data from hidden fields in the hosting page, and calls javascript functions on the page.
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Jun 12, 2009
I would like to make the Tab movement can also pressing the "Enter" Key. I have google and found the code which possible to used. But I found its not running fine with me. When I press "Enter" key,it runs fine for the tab movement. But if I put something into my textbox,it only allowed me to put 1 character and it will move next. Because the Textbox 2 can able to put in any kind of numbers. But after add in the code that allowed "Enter" key move the Tabindex,it will move to the next tab index after I lick 1 character.
Code:
Private Sub TextBox2_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox2.KeyPress
If Keys.Enter Then
SendKeys.Send("{TAB}")
[Code] .....
How should I do to make the "Enter" key press work as tab?
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Nov 25, 2010
Dim mControl As Object
For Each mControl In Me.Controls
If TypeOf mControl Is TextBox Then
If mControl.Text = String.Empty Then
[code].....
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Dec 18, 2009
I have 20 controls that I created on a form. the names are like btnRing1, btnRing2, btnRing3, etc.
So I have a do while loop , and I have my variables in place. One line of code is "btnRing1.Start = PlrName" So PlrName is a variable, pulling that info from a database. I don't want to list each btnRing1, 2, 3 in each block of code in my loop.
Is there a way to use the name btnRing + 1, or something like that so I don't have to list all 20 controls in my code.
I know I can dynamically build the controls, but I can only have 20, so I need to have a little control on the numbers. So I need to have the controls already built.
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Feb 4, 2010
I have a groupox in a VB.NET winform app. The groupbox contains a few Labels, Textboxes and Checkboxes. This was created by simply dragging the controls out of VS toolbox. What I need to do is take the 1 Groupbox and at runtime create multiple Groupboxes to display based on user selection. Instead of dynamically creating the Groupboxes and other controls nested inside, is there a way to clone or copy the original one. Then I'd just change the properties. Label text, Textbox text, etc. And the location of the Groupbox in the layout.
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Mar 12, 2009
Showing Command Prompt On Winform Control
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Apr 8, 2009
I have attached a image of a control that is used within a coldfusion website. Basically I need something similar to use within a Winforms application but have never seen anything like it in .net. How I replicate this control?
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Sep 1, 2011
I have a list of Active Directory entries (computer names) as a Collection data type. How can I add the computer entries and the pertinent columns to the DataGrid control on my WinForm? I have borrowed this code from some web site to add the list of computer to the pcList which is a Collection type.
pcList.Add(dirSearchResults.GetDirectoryEntry().Name.ToString())
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Jun 15, 2011
I don't understand why my Label and Text controls are aligned when placed on a winform in design mode, but when I run the application the Label and text controls are uneven and spreaded apart. I using VB .Net 2008.
I tried adjusting the TextAlign property on the label control but the problem still exist.
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Apr 11, 2009
How can I read the properties for a given contol type at runtime without having the masive overhead of specifing the each property for each type of control in code.
For example supose you are building an application where the end-user selects a contol type form a drop-down list in a combobox then the properties (Read, Write, Runtime, Designtime) for that control are displayed in a listbox.
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Apr 11, 2009
How can I read the properties for a given contol type at runtime without having the masive overhead of specifing the each property for each type of control in code.
For example supose you are building an application where the end-user selects a contol type form a drop-down list in a combobox then the properties (Read, Write, Runtime, Designtime) for that control are displayed in a listbox.
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Aug 12, 2011
I am trying to loop through my repeater control and get the textbox values.However, I am getting an error: {"Object reference not set to an instance of an object."}
my code is:
Dim txtField As TextBox
Dim j As Integer = 0
'Confirm if user has entered atleast one quantity
For Each item In rptRequestForm.Items
[code]....
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Jul 3, 2011
I'd like to go through all the items of a ListView control in order to ... well execute some code. I suppose I have to use the "For i=1 to ..." statement , but I am not familiar at all with this control. As I said , I'd like to check all of the items (the elements in the first column) and for each of them that has "Yes" on the third column , I would like to run the rest of the code .
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Jun 19, 2009
i have created control array , now i wann to loop around as well wann to find which control has triggered the respective event my code :
[Code]...
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Jul 7, 2010
A Form is to Accept User Name and Password from user, after verification the form should display another form that will accept user's full data. When a user press the Ok button, the information entered on this form should be display in another form (Showing the user what he/she has entered)
i have Design the Firs Form and the second form, how can i pass the information entered on the second form to third, and also what will the code look like I need help on this or Code Sample?
NB: i am trying create an instance of the second form in the third form and declare a variable in the third form that will holed the value, but still not working I want to learn .NET Programming in VC#, ASP.NET And VB.NET. I am student and really get excited when it comes to programming
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Feb 4, 2010
is it possible to use the same database for winform application (with vb.net) and web based with asp.net?
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Feb 1, 2011
I have a winforms app with multiple GUI threads. I want them to be able to access each other's thread objects without having to keep track of that information separately.Is there a function in .NET that I can feed a winforms control or window object, and get back the thread? Or a function in the API I can pinvoke for the threadID?
Edit For those of you who for some reason believed my italicized text, congratualations, you're hired!! Here is the problem: "App is crashing in the wild by locking up totally, that is, it stop responding. Very intermittent, and trying to debug it, it seems to never happen."
So what do do? Install an option in the program that the user can activate under our direction, whereby from another GUI thread in the same app, do a thread.abort on the main GUI thread, then we can look at the call stack in the error log. Viola, found an impossible to debug error in less than a day. (Stop now, it had nothing to do with abusing multithreading:-)
I'll admit I almost didn't ask this, the reason I did was I could see an object reference to the main form, but there wasn't any for its thread. I'm giving Chris Shain the answer a/c it is a quick way, unfortunately when the thread is hanging, I wouldn't be able to do an invoke (it would hang too). A little more digging revealed the GetWindowThreadProcessId API call. But it's an unmanaged thread ID, apparently there are complications turning that into a managed thread ID.
So I bit the bullet and put in a global reference to the main UI thread. Would have posted it to begin with, but hadn't written it yet.In main public module/static class:
Public GUIThread As Threading.Thread
Sub Main()
[code]....
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Aug 24, 2009
I am trying to put a pdf file on my form using microsoft report viewer, but i cannot find it. where is it?
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Sep 4, 2011
ok so i dynamically create a wsf for running an automated telnet session that works great!!(finally!!) but auto executing the script from my code is proving difficult for whatever reason.
I have tried:
Shell("C:shutoffscript.wsf") this produces this result.
also tried setting a bat file that launches the script and launching it as well using shell every time I launch it I get an error in the script that works just fine executed outside my code.
using outfile As New StreamWriter("c:" & "shutoffscript.wsf")
outfile.Write(sb.ToString())
End Using
MsgBox("Script built press ok to execute")
Shell("C:shutoffscript.wsf")
I think this has to be some sort of permissions error right? Since both errors tend to not be able to find the file. Just not sure how to fix it.
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Jan 20, 2012
Public Class ConsoleHelper
<Runtime.InteropServices.DllImport("kernel32.dll")> _
Public Shared Function AllocConsole() As Boolean
End Function
[Code]....
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Sep 22, 2011
COM Reference 'AcroPDFLib' is the interop assembly for ActiveX control 'AxAcroPDFLib' but was marked to be linked by the compiler with the /link flag. This COM reference will be treated as a reference and will not be linked.Winform - Get It To Run On other Computer?
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Dec 1, 2010
Done quite a bit of looking but not finding what i need. From a win form i'd like to open up a web browser passing in a url. But i need to provide authentication while doing this. I tried just using a system.diagnostics.process.start("http://userid:pw@site") but that does not work. Was hoping someone could lend a hand.
[Code]...
so is there anything else that can be done to get IE to work.. cause i'm thinking that would allow the above code to work as well.
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Dec 9, 2010
There is alot of "search-hits" for the BASS.net Lib, but there seems to be non documentation for how to do this on the [URL] page. My problem is: I want to be able to play a .XM file in my Winform. I'm using VS 2008, .NET 2.0 on a 64-bit computer. Does anyone have any experience with this?
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Oct 25, 2011
How to set winform start position at top right? I mean when user click (start) my winform application the winform will appear at the top right of the screen?
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Jan 11, 2011
VB.Net / Winform.Is there a component that will look like a Button but when pressed will open like DropDown, but the DropDown wil contains a list of Buttons? Menu bar won't work for me in this case.
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