I have several controls in a winform application that I added databindings to using code.
Dim tblWrapper As ObliqueQCAndSpliceTool.TableWrapper = New ObliqueQCAndSpliceTool.TableWrapper(tbl, idField.Name)
tblWrapper.UseCVDomains = True
[code].....
I need to make a winform full screen. This is what I found online.
1. Hook WinProc to catch WM_SYSCOMMAND
2. Check wParam == SC_MAXIMIZE and then
3. Set my windiw's attributes
Me.ResizeMode = ResizeMode.NoResize
Me.WindowStyle = WindowStyle.None
Me.WindowState = WindowState.Maximized
I am fairly new to vb.net and do not know how to do Steps 1 or 2.
What can you suggest on how to make a CMS quiz in visual studio (Winforms). It is possible in WinForms alone?
View 3 RepliesI'm trying to create DataBindings to textbox and combobox controls on my form. Here is my code so far:
Private Sub SetBindingSources(ByVal strClientID As String)
Try
'This section of code populates the grdAddresses DataGridView
strSQL = "SELECT B.addrDesc, A.addr1, A.addr2, A.addr3, A.city, A.stateCD, A.zipCode, A.phone, A.fax "
[code]....
The highlighted line of code is returning the error message (see screenshot below). The part that I'm not sure what to code is the "dt1.addr1".
I'm try to making a text box showing a date, this what i've done
[code]...
I'm having some problems with a data bound datagridview.My current scenario is the following..The itemSetup has tree properties {ItemNo, CompNo, LocNo}(compno locno are not required)I have a datagridview with a datasource list of itemSetup And this has two comboxes cboCompany that is bound to a list of company the selected value is bound to compno. cboLocation that is bound to a list of locations the selected value is bound to locno the location class requires the compno to create the list of location the problem I run in o is that the when the compno is Nothing the cboCompany throw a datagridview_ dataerror when the form is loaded en when a item is added it looks like the binding of the combox runs later then the value is set.
View 4 Replies(I used to use VB6.) I have been developing a database management program which is quite simple so far, with navigational controls, ability to delete record, datagrid, etc.
It uses databound textboxes, but when I modify the content of them it does not update the database. Same applies when I add a new record and fill in the textboxes.
I'm having trouble using DataBindings in a Windows Form / User Control. For example: Create a windows form, place a single text-box on it & place two buttons on it. The code behind the form is:
Imports System.ComponentModel
Public Class Form1
Implements System.ComponentModel.INotifyPropertyChanged
Public Event PropertyChanged(ByVal sender As Object, ByVal e As System.ComponentModel.PropertyChangedEventArgs) Implements System.ComponentModel.INotifyPropertyChanged.PropertyChanged
[Code] .....
If you type something into the text box & press Button1, you'll get a message box with the text of the property in it. If, however, you press Button2 (which sets the property in code) and then press Button1 again, you'll see that while the property was indeed set in the code, the text box doesn't reflect the change.
Updated the code to provide the implementation of INotifyPropertyChanged. This now works as desired.
I want all binded controls in a form or a user control have the Data Source Update Mode to OnPropertyChanged (by default they are in OnValidation).I can do that for each control in designer mode and in the DataBindings, under Advanced, change the Data Source Update Mode to OnPropertyChanged but I want to do that once for all controls.
All my controls are in a big user control, so I put before InitializeComponent() :
Me.DataBindings.DefaultDataSourceUpdateMode = DataSourceUpdateMode.OnPropertyChanged
It is not good, my controls are still in OnValidation mode (instead I force the
[code].....
I have been developing a database management program which is quite simple so far, with navigational controls, ability to delete record, datagrid, etc.
It uses databound textboxes, but when I modify the content of them it does not update the database. Same applies when I add a new record and fill in the textboxes. What do I need to do?
I wanna know a thing.I wanna know how to move into the different regs of the form (using databindings), just focusing the ID textbox and selecting ALT + => to go to right, ALT + <= to go to left, ALT + UPbutton to go to next and ALT + DOWNbutton to go behind.
View 2 RepliesI'm making a seat booking system in vb.net (WinForms) and I need the user to be able to select the seat they wish to use and for it to change colour (so they can tell that it selected).
I began to try using buttons, but 480 buttons seriously slowed down the load time for the form. I then tried a data grid view with buttons in the rows/columns, but couldnt make that work properly.
Would it be worth trying to use 480 picture boxes and change their background colour? Or would that just slow the form down the same way as 480 buttons?
is there any way to make the form title(form1.text) moving?like marquee in HTML?
View 2 RepliesI have a form with many different textboxes on it. The form is used to Edit the data already in a databound table. At design time I set my Databindings.text to the appropriate columns.
During form load I check the values in the bound column for null values. If the column value is null, I set the textbox.text property to a descriptive prompt like "enter telephone #" or enter city. I also use databinding.remove to remove the databinding so that the desriptive prompts don't wind up in the database.
Here is the code I use to remove the databinding.
For Each Panels In Me.Controls
PBox = TryCast(Panels, Panel)
[CODE]...
.Tag2Defaultphase is a custom property I have defined which holds the default descriptive prompt. If the user enter a value into the textbox I then wish to add the bind back so that when I updateall with the tableadapter the value will be transferred back to the appropriate bound column.
Here is my code for that:
Sub perOptionalTBoxValidation(ByRef TBControl As custTextBoxControl, ByRef strDefaultTextPhrase As String, ByRef intMaxChars As Int32, ByRef bsBindingSource As BindingSource, ByRef strColumnName As String)
[CODE]...
I am doing a project for a course that involves a database, i have it set up already so that i can have two different labels displaying data from two different fields in a table when the form loads, but i am trying to get it so that when i click an option in a listbox it will change the displayed information. I am using the following code to set it when the form loads:[code]
View 2 RepliesI am sharing databinding when opening a detail form a summary form. The data is shared fine. What I don't know is how to save any data that may have changed, or to create a new record.[code]...
View 2 RepliesI am porting a college project made in VB6 to VB.NET, which I am quite new to. I'm finding data bindings a little more frustrating than the ADO controls VB6 had. Here is an example of RecordCount being used in the old code, from the login screen:
Private Sub cmdLogon_Click()
If txtID.Text = "" And txtPassword.Text = "" Then
I am trying to add to a binding using Control.DataBindings.Add(). The issue that I am having is that the data member name has a period and space in it("Foo. Bar"). When I try to add the binding I pass in the string "Foo. Bar" as one of the arguments and I get an exception "CAnnot find datamember "Foo.".Is there a syntax that I need to use to pass the datamember name in when it has a period in it? I tried adding "[]" around the name but no dice.
View 3 RepliesWhat are the pros and cons of using the checkboxes checked property vs the CheckState property for databinding?
View 1 RepliesI can't seem to figure out how to use databindings to enable/disable a button when a listbox contains 0/1+ items?
Button1.DataBindings.Add("Enabled", ListBox1, "Items.Count")
Button1.DataBindings.Add("Enabled", ListBox1.Items, "Count")
Result = ArgumentException: Cannot bind to the property or column Count on the DataSource. Parameter name: dataMember
Button1.DataBindings.Add("Enabled", TextBox1, "Text.Length") ' This works?
I have some textboxes bound to a bindingsource and bindingnavigator.
I want to detect when the values have changed and prompt the users to confrim if they want to update.
When the form is first initalised and when then binding navigator moves to the next record the text_changed event fires on textbox where I have a boolean to determine if things have changed.
Is there a way to set my boolean only when valid data changes have occured or a better way to detect if things have changed
I have a form that has several controls, most of them are textboxs. All controls are binded to a bindingsource. The controls that always have values, they are displayed correctly, but the others ones that have null values in the data source, the default null value doesn't show up. This problem it's driving me crazy... There must be something that i'm missing. Some of the code that i had used with no luck:
[Code]...
can i use an inverse notation in the databindings to enabled or disabled one checkbox?I have a form that has several controls binded, and if i have true in one field in the database i need to check checkbox and disabled it.Something like:
vb.net
chk.DataBindings.Add("checked", bs, "MyDBFieldBool")
chk.DataBindings.Add("enabled", bs, "MyDBFieldBool")
This can be done directly?
I used to use ADODC with VB6. Once I've set up databindings I can set a text box or other controls to link with a database's specific field by changing the Text property under Data > DataBindings. I want to change the field the text box links to at different times using code. How can I do this?
View 13 RepliesIs it possible to set a project default for VB.NET winforms projects so that the default Modifier for controls added to winforms is Private (not Friend)?I know there's a "modifiers" property in the properties window so I can set it for each individual control however I would like to change the project so from now on myself and other developers have to specifically decide to change from friend to private. (Which I would strongly discourage them from doing).I believe there is no way of doing this, but on another forum a while ago someone mentioned it would be possible with an add-in (but didn't name the add-in or where to get it).
View 1 Replieshow to make the datagridview read only as i noticed that when i display a datagridview with the data, it can be edited. How can I just display the data from the database. I use datagridview is to show the data that get from the database, am I right?Hope that anyone could help me on is there any way to display the data that frm the database beside datagridview?
View 10 RepliesI have a class which contains the object and a collection for that object. I want to make a property readonly to external calls, but allow access to that property from the collection class. I know I can use:[code]But, I want to the PreviousRow property to actually show as "ReadOnly" in the intelisense of the calling code of client app. The above does not. The only way that I see to make it show as "ReadOnly" in the called code is to mark the whole property as ReadOnly, but the problem with this is that my collection class code can no longer access this property:[code]I tried using the "Friend" declaration, but that seems to still allow Write access to the calling code.I only want write access from within the RowCollection class.
View 9 RepliesAnyone have any have some code to make everything (or even all TextBoxes in a form) read-only all at once without having to set every control to read only individually?
View 6 RepliesI made a launcher to launch a bunch of programs, and i wanted to know if its possible to make the .exe read the /ini file to get the path.[code...]
View 4 RepliesI am working on some USB (flash drive) software which i want to make portable and always accessible on USB i know .net is not good for this because much users don't have framework installed but users who use this software have it installed and i just love VB.net :)
So what i want to do is to create a hidden partition on this USB device where software will store some info and itself. The software and data it stores is 6MB so i would also like to know the suggestions from you what size of this hidden partition can and i should make.
But:
how do i read from hidden partition through .net?
(i did never confront with this till now...) how i make hidden partition through .net?
I want this because users i working this for usually format their drives and that way they delete the software too, so hidden folder and encrypting doesn't help me in this.