winforms

How to prevent my C# winforms application from stealing focus when I set the visible properly to true?

I've got a C# winforms application that runs in the background, listening for hotkeys to be pressed. When a hotkey is pressed, my form makes a brief appearance. The form is always running, but set to hidden until I receive a hotkey event, at which time I set the visible property to true. The code looks like this: void hook_volumeDown...

Where do I control the behavior of the "X" close button in the upper right of a winform?

I'm venturing into making my VB.NET application a little better to use by making some of the forms modeless. I think I've figured out how to use dlg.Show() and dlg.Hide() instead of calling dlg.ShowDialog(). I have an instance of my modeless dialog in my main application form: Public theModelessDialog As New dlgModeless To fire up t...

A null value should be considered as 0 when addition of it is done with decimal value.

There are three column in the datatable A,B and C. Now each column is type of decimal. Now I am doing like dt.Columns["A"].Expression="B+C"; to make addition of Column B's record and column C's record. Now if there is any value of B or C is null then addition of B and C will be null like B's value is 3 and C's value is null for first row...

What is the simplest, but solid, interface from WinForms to a SQL Server database?

Hi, If I wanted to have my data in SQL Server, but wanted to use a thick client WinForms application for users, what would be the best practice way to have calls occurring from WinForms to database? And how simple is this? I guess I'm trying to gauge to what extent there are issues with this approach and one needs to go for some (a) m...

C# - Is it possible to start my project with a class instead of a form?

I want my project to be started through an class instead of a form, is there any way to do this? Or to be more precise is there any good way to make sure that the first class, except Program, that is started isn't a form-class. I tried to change to my class in Program.main() but it looks like Application.run() needs a ApplicationContext...

.Net: Why we can't access to some properties of a control programmatically in winforms?

.Net: Why we can't access to some properties of a control programmatically in winforms? For example, "Locked" property of a groupbox is not accessible via code. So What Possibly can I do when I want to locked it programmatically ? Using Enabled = False will greyed out all controls within it and this is not what I wanna to be. Any Sugge...

Can we add any type of value in the list object ?

Can we add in the list object any type of value ? Like if we List<string> str=new List<string>(); then only string value can be added to list.But I want to add any type of value in the list like string,decimal. ...

in .net, what programming model would be good for prototyping, but then reusable for production (for business logic/data access layers)

Hi, In .NET land what would be a good approach for quick prototyping of a concept (i.e. development just on my PC) that could then be extended out to product (users across LAN/WAN), BUT in a fashion that the model/business logic code and data access layer code can be used as is? One thought for example I had as to do: (a) WinForms with...

How does a winform event hook up the win32 messages

any article talk about how a winform event hook up the win32 message? ...

In a Windows forms application, how can I use a listbox in a DataGridView coloumn instead of a combobox

I'm working on a windows forms application that uses a DataGridView. Some of the cells contain a DataGridViewComboBox. In some cases, I have several values to display in the combobox. For that scenario, it would be better to use a ListBox instead of a ComboBox. Is it possible to use a multi-column listbox within a DataGridView instead of...

Using Timer only once

Hi, I want to use a timer only once, at 1 second after the initialization of my main form. I thought the following would have a message box saying "Hello World" just once, but actually a new message box says "Hello World" every one second. Why so? I had put t.Stop() in the tick event. Also, do I need to dispose the timer somehow to avo...

Design question for windows application, best approach?

Hello, I am in the process of designing an application that will allow you to find pictures (screen shots) made from certain programs. I will provide the locations of a few of the program in the application itself to get the user started. I was wondering how I should go about adding new locations as the time goes on, my first thought w...

Drawing a relative line in C#

Guys, I know this is going to turn out to be a simple answer, but I can't seem to figure it out. I have a C# Winform application that I am trying to build. I am trying to draw a white line 60 pixels above the bottom of the form. I am using this code: private void MainForm_Paint(object sender, PaintEventArgs e) { e.Graphics.DrawLine(...

Using VirtualMode on a DataGridView when the number of rows/columns isn't known

I need to display an unknown length sequence of dictionaries with unknown keys efficiently in a data grid. This sequence is the result of a potentially slow LINQ query that could contain any number of results. At first I thought that VirtualMode on DataGridView was what I was looking for but it appears that the number of rows and column...

How to highlight a taskbar item

In almost all messengers when your IM window is minimized to the taskbar, IM taskbar item changes color or gets brighter when you have a new message. I've been looking for any help on how to do this using .NET Winforms or WPF Any code samples? ===================================================================== EDIT: I used FlashWind...

How To Bind ComboBox With ListItems in windows Forms?

hi all i want to make a 2 comboBoxes ,the first one shows Hours and the Second Shows minutes but i cant do so in windows application as i have working as a web dev for a while and i forgot so i want to declare listItems then bind it to combo box i want to make it as a custom control so i want some help to tell me how to do that i am u...

draw a bar chart using C# in windows application

Can I draw a bar chart using C# ? Do I want to use separate library for that? Thank you. ...

How can I move app.config to a different folder inside the Solution Explorer?

I'm using Visual Studio 2010. In my Solution Explorer I like to sort my Project items into folders (a folder for Forms, a folder for Classes, a Misc folder, etc.) It seems though that if I move the "app.config" file to a folder named "Config Files" everything works until I change a setting in the Settings.settings file. Once I do that, ...

WPF with code only

I've seen a lot of questions about the merits of WPF here, and essentially every answer says it's the bee's knees, but essentially every answer also talks about things like XAML, in many cases graphic designers and Expression Blend etc. My question is, is it worth getting into WPF if you're a solo coder working in C# only? Specifically,...

WinForms (C#) Databinding Object to Checkbox.Checked Property

Hello, I'm writing a WinForms app, and am trying to bind a boolean property on a .NET object to a Checkbox's "checked" property. I am successfully creating the binding, but when I change the source property's value from false to true (I have a button that toggles it), the checkbox's "checked" property does not reflect that change. if (...