Develop A Custom WinForms Data Source Control?
Nov 6, 2009How can I develop a custom data source control for WinForms ? This example is just for ASP.NET. VS version: VS 2008
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DataGridView / Data Source (Adding New Row Programmatically) + Custom Control 'setting?
Jul 30, 20101. I have a DataGridView box, that is connected to a MySQL database via the 'Data Source'. I am trying to do the datagridview1.rows.add("info here"), however i receive an error i cannot do this programmatically. I DO know the code to post to MySQL via the "insert into" la la la.However, I was curious if I can do this via the datagridview a bit..easier/simpler, such as a "datagridview1.rows.add(stuff)" sorta thing.
2. I am attempting to make a custom control, and as with ANY control, they have their.. settings. Example, a textbox, or label, has so you can set the Text. and color, etc.Others, have it (such as datagridview) have the little icon on the control itself, where you click it, and it opens a small window with settings.
Winforms Data Binding: Custom Classes Or Datatable?
Jul 8, 2009Am in the process of architecting a new windows forms application, and I intend to use Visual Basic 2008 and SQL Server Express 2005. This is my first application in .Net and I really want to observe the best OOD & OOP principles to create an application that is easy to maintain and extend (add new functionality). My issue is in regard to databinding on the UI. From experience, what do you guys recommend to use for databinding? Should I return datasets/datatables from my Business Layer and bind these to UI controls or should I return Business Objects and bind these to UI controls? And what are the pros and cons of each approach?
View 1 RepliesC# - Add A Reference To Some Source Code To Include In A Source File In .net, Winforms?
Jan 26, 2010I don't know what this is called so I've struggled to find an answer from google but I have a vague memory of it from t'old days.I've sub-classed (* see below) about 8 framework controls, overriden some properties and added some functionality into each one.The changes I have made are identical in every case. If I make a change, I have to go through each class and apply the same change there.I was hoping there may be a keyword such as <IncludeSourcefile "common.vb> that I can put into each class.
(* note) I use the term sub-classed but I don't know if that's the correct terminology. I've also seen it used for call-backs. Is sub-classed the correct term to use?
Develop A Simple VB Application To Control A Data Projector Using RS232?
Feb 1, 2011I am using Visual Basic.net 2010 to try to develop a simple VB application to control a data projector using RS232.So far, I have programmed the 'power on' button to open the serial port and send the power on command.The port opens successfully, but the projector does not receive the command properly, so it never powers on the projector.The RS232 command for power on is: BE EF 03 06 00 BA D2 01 00 00 60 01 00
My code for sending the command is: Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code]...
Using List Of Custom Class Object As Data Source For Crystal Report
May 24, 2011I am trying to find way to design a report using my own custom class. I found links:
1.) How to work in Crystal Report with Object Data Source?
2.) Use .net object as data source in Crystal Report 2008
3.) Binding object with List<> to Crystal Report
4.) How to assign Custom class as datasource in crystal report
They were quite helpful, but I have been stuck in the first step while designing report as my custom class's property is not listed in field list of crystal report design view.[code]When I add my class objects to crystal report I do not get the usertype field from users class in field list.So how can I add usertype field to my field list? Or do I have to take another approach?The reason i wanted to use it as i am:
1.) Showing a form where user can type keyword
2.) program filters the records as per keyword using LINQ
3.) when user clicks the print button, I want to set the filtered records as datasource of my report
VS 2005 Custom Connection String In Data Source Configuration Wizard?
Apr 17, 2009I am looking to make a data connection with a network server(sql server 2005). When I run the data source configuration wizard, it allows me only to pick a local database file. I want to use a connection string like this "Data Source=SQLSERVER;Initial Catalog=mydb;User Id=username;Password=password;" I know I can do that programmatically. But I would like to know whether I can do that using the data source wizard so that I will be able to use Bindingsources and tableadapters.
View 4 RepliesDevelop Open Source C# Application?
Jul 5, 2010Is it possible to develop open source VB.Net/C# application, I have developed many application using .Net, but first time want to develop open source application.
View 7 RepliesSet "autocomplete Custom Data Source" To A Mdf Database Data Table?
Feb 22, 2011I have a data table (mdf). I want my text box to show suggestions from a column of that table.
View 3 RepliesGetting Data From WinForms ListView Control?
Mar 24, 2010I need to retrieve my data from a ListView control set up in Details mode with 5 columns.
I tried using this code: MessageBox.Show(ManageList.SelectedItems(0).Text)
And it works, but only for the first selected item (item 0). If I try this:
MessageBox.Show(ManageList.SelectedItems(2).Text)
I get this error: InvalidArgument=Value of '2' is not valid for 'index'. Parameter name: index
I have no clue how I can fix this, any help?
Edit: Sorry, should have said, I'm using Windows.Forms :)
VS 2008 : Can Data Reader Be Used As A Data Source For A Grid Control
Mar 21, 2010can data reader be used as a data source for a grid control?
View 5 RepliesBind A Tree Control To A Data Source?
Feb 26, 2009I need to create a new tree view, that is linked to a particular table.
Each row in the table has a parent id that links back to the table's primary key, and that defines the node hierarchy. So that relationship needs to be indicated in the databinding.
Am I able to use the standard treeview control in Visual Studio 2008, or do I need something extra to make this work?
IDE :: Possible To Bind (one) Control Into Two Table / Data Source
Dec 3, 2009Resources: Visual Studio 2008 Pro (currently in 90 days trial)
Platform: OS - Vista Home Prem 64-Bit
Language : Visual Basic
I'd like to bind my textbox into two (column)from different table is it possible to do this? I already know how to bind (one-to-one) controls and table.
Develop Custom Query Builder In Application?
Aug 12, 2011I want to develop select query builder in my vb.net application. If user write the "select query" in a richtext box that query will be executed and the result will be displayed in a grid view. Any one send the Sample Application for this
View 1 RepliesGet The Databound Control To Reflect The Changes To The Underlying Data Source?
Mar 2, 2011I have an object databound to a WinForm. One property, BOLNumber is bound to a textbox on the form. When you change the value in the form, the underlying BOLNumber property is changed. But the property setter does some "formatting" to the value. I want to BOLNumber textbox to reflect the changes to the value made in the property setter immediately upon the textbox losing focus. I tried implementing the INotifyPropertyChanged interface, but I am either doing something wrong or misunderstanding something it would seem. How do I get the databound control to reflect the changes to the underlying data source?
Public Event PropertyChanged As PropertyChangedEventHandler _
Implements INotifyPropertyChanged.PropertyChanged
Public Property BOLNumber As String
[code]....
Persisting An Array Of Data Using A Custom Control
Oct 12, 2011Does anybody know how to persist (save and recall) a structure array when using a custom control? I don't want this data to show up in the properties window but it needs to be available "behind the scenes".
Right now, I'm writing the information to a file but this causes portability problems and may trigger the UAC.
[code]...
How can I persist this without writing to a file? Should I save it to the registry?
Change HTML Source In Winforms?
Mar 25, 2012I have the below srtucture of html page
<video controls="controls" width="480" height="208" id="video1">
<source src="http://devfiles.myopera.com/articles/2642/sintel-trailer.ogv" type='video/ogg; codecs="theora, vorbis"'>
<source src="http://devfiles.myopera.com/articles/2642/sintel-trailer.mp4" type='video/mp4; codecs="avc1.42E01E, mp4a.40.2"'>
</video>
Now I want to load video using OpenfileDialog and replace the filename with it's extension in place of src="http://"
Call ODBC Data Source Administrator Form Of Control Panel And Get The Selected DSN And Its Contents
Jun 28, 2011How do i call ODBC Data Source Administrator form of Control Panel and get the selected DSN and its contents
View 3 RepliesIDE :: Data Source Disappeared - Recreate My Data Source From The Entry That Is In App?
Feb 10, 2012I refreshed my data sources to include additional items from the SQL Server databases and it appears that my entire data source from my VB.NET project disappeared.I am using Entity Framework. I may have clicked on something wrong, not quite sure. Unfortunately I can't recreate the Data Source without creating a new Entity and Data Model.I can delete the entry in the App.Config file and recreated it, however things aren't quite right.Is there a way that I can recreate my Data Source from the entry that is in my App.Config file...since that appears to have remained intact.BTW, I can go to my Data Model and successfully refresh from there, however my project isn't connecting to the database so I have quite a number of errors until I can get reconnected.
View 4 RepliesDevelop Captcha Control Itself
Mar 18, 2011I am developing a website where I need a captcha control and I want to develop the captcha control itself, so in the future I can change its length, type, color, and have it be easy to manage as well.So, suggest me which technology used for to develop the capha control and how.I am using asp.net platform with vb.net as the language.
View 4 RepliesCustom Sub Main For WinForms Applications?
Mar 3, 2011I'm interested in building my own basic Application controller and ditching the Application Framework entirely.Never done this before (or even considered it) but now I'd like to be able to cut out anything that stands in the way of making my App compatible with both DotNET and Mono, for which Microsoft.VisualBasic.ApplicationServices is pretty famous.I start, or links to sample Main Modules for WinForms online? Seems like most of what I find is for Console apps.
View 8 RepliesWinforms - Custom Constructors For Forms In .net?
Nov 1, 2010I would like to open a new form from some other form, and pass some selected object from a control on that form to the new form. The sensible way to do this, I thought, was as a parameter to the forms constructor. Now I know that the visual studio GUI creates partial classes for my forms, that hold the properties that I can drag onto there in the designer. I assume it also holds a default constructor. Since it might do all sorts of stuff that is needed to initialise the form, I figured I should call it from my custom constructor ala
public sub new(byval my_parameter as Foo)
Me.new()
Me.my_parameter = my_parameter
[code].....
That clearly wasn't it, because it can't find a default constructor. The thing is, visual studio goes trough great lengths to prevent me from seeing the generated constructor, so I know how to access it. This leads me to believe that I am actually doing it wrong, and should have set out on some different path, as the path you are forced in to usually is the sensible thing to do, which I usualy find out way too late.
Binding Source Filter In Access Data Source?
Oct 11, 2010I have an Access database and I want to view on a datagridview specific rows. For that I used the following :
CasesBindingSource.Filter =
"OfferDate Between #1/1/1997# And #12/31/1997#"
Cases is the table, OfferDate a field of the table wich is DateTime type.
When I use Between operator I get the following error :The expression contains unsupported operator 'Between'.
Develop User Interface Control
Jun 6, 2011I am trying to develop system where i can add run time some user control like button, textbox, checkbox.
View 2 RepliesVS 2008 Using Custom Membership Provider In WinForms?
Feb 8, 2010I would like to use my custom membership provider (which is working in my asp.netapplication) in my windows forms application.I thought this would be relatively straight forward, and followed these steps:1. Copied MembershipProvider class into my application.2. Add reference to System.Web3. Create app.config with membership settings i.e:
View 3 RepliesWinforms - Adding A Custom Button In Title Bar?
May 30, 2011I was just wondering if there was a possible way to add a custom button into the title bar using VB.NET. I've seen many such questions on Stack Overflow but failed to get a sure-shot and a working answer.
View 3 RepliesWinforms - Use Custom Roles For User Access?
Sep 2, 2009I have a winforms (VB 2008) based app that I'm developing and I want to use custom roles for user access.Application Layout:I have a Main form that opens a login form when certain actions occur.The Login form intern uses an authentication class that I've created, to authenticate users and set access rights.On my Applications settings page, I have Authentication Mode set to Application-defined because I cannot use Windows Authentication in the environment where this will be deployed.
The application uses a MS SQL 2005 db and the 3 tables I'm using in the authentication process are the User_Account , User_Roles and User_Access tables. The combination of an account in the User_Account and the roles within the User_Roles table are the bases for the User_Access table. Using the User_Access table is how I assign access to the various functions within the application
Authentication Method:To authenticate a user, I'm using the "My.User.CurrentPrincipal" (Code below) method. The My.User object works great and allows the use of "My.User.Name" property throughout the app when referring to the currently authenticated user.
Access Method:In order to set the current users access levels I'm using a function within my Authentication class and passing in My.User.Name as a variable. The function uses a Dataset Table Adaptor and a Select Case statement inside a For loop to assign all the access levels for the user (Function code below).
My Problem:This method of assigning access rights to a user does work but it's not persistent throughout the application as the My.User object is.I would like to find a way to create custom roles through the My.User object using its .IsInRole property. I would like to have these roles dynamically created using my User_Roles table.This would allow the custom roles to be used throughout my application using the My.User.IsInRole ("MyRole")syntax ...similar to how I'm currently able to use My.User.Name.Unfortunately the only roles I can currently validate against are the built in Windows
type accounts (Adminisrator ...ect.).
'User Authentication example:
If Authenticate.CheckPassword(tbxUserName.Text, strPassword) Then
My.User.CurrentPrincipal = New GenericPrincipal(New GenericIdentity(tbxUserName.Text), Nothing)[code].....
Develop Ground Control System Software?
Jan 30, 2012I have been assigned to develop ground control system software. The thing is, i have never use visual basic before. Can anyone help me or guide me on how to develop the ground control system software?? is there any tutorials or basic training module which is almost same like ground control system??
View 6 Replies.net - Create Custom DataTable Which Is Bindable To WinForms Controls?
Aug 25, 2011Our shop primarily use "ADO objects" (I'm referring to DataSet, DataTable, and DataRow) for marshaling around data and manipulating it on forms and in grids. We are experimenting with creating shop-flavored counterparts to the native ADO objects so that we can impose our in-house standards on top of them. Implementing this is straightforward with one exception: I want our objects to be bindable to controls.
I'm aware of IList, IBindingList, BindingSource, etc. and have looked at and experimented with these, but I am falling short when it comes to making a class with no hard property names bindable. The native ADO objects are not strongly typed by default. You have column values that you access via the Item property (e.g. row("Age") or row.Item("Age")). The binding examples I've found online deal with strong-typed objects (e.g. row.Age). Essentially, we want to create custom ADO objects (not inherited from the native ones) that still retain their ability to bind to controls. In a grid I would expect to see columns Name, Age and Occupation from a row where these properties are exposed via row("Name"), row("Age") and row("Occupation"). This must be doable as this is exactly what the native DataTable and DataRow provide.
Specify A Custom Icon For Display In The Toolbox Window When Create Own Custom Control?
Dec 29, 2011how to specify a custom icon for display in the toolbox window when you create your own custom control? Something other than the dreaded "gearbox" icon.
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