I'm very new to Visual C#
I've already made a calculator, following a tutorial.
Now, I'm trying to make a simple program, when run will bring up a box that shows what the computer name is. I have an idea on how to do it, but I'm still learning the C# syntax.
I have made the box that pops up and it says, "This Computer's Name is:"
then I made a blank label, and I want to be able to change the label to the computer name using System.Environment.MachineName
Here is what I have:
private void name_TextChanged(object sender, EventArgs e)
{
name.Text = System.Environment.MachineName;
//name being the name of the label
}
The labels text change event doesn't fire until something changes it's text.
Instead use the Forms Load event to do it, then use that line of code you have.
Firstly you want to create a form load event handler, you do this by double clicking on any blank space in the form, it will take you to the code window that is where you will want to write the following statement.
The form load event is executed before the form is displayed on screen, therefore your machine name will be displayed as soon as the window is visible.
Lets assume your form is called Form1
this is what your code will look like :
namespace Machine_Name
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
// This is the form load event handler
private void Form1_Load(object sender, EventArgs e)
{
yourLabel.Text = Environment.MachineName;
}
}
}
Related
It's my first time using winforms. I'm having some issues.
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void TextBox1_TextChanged(object sender, EventArgs e)
{
}
private void Form1_Load(object sender, EventArgs e)
{
textBox1.Text = "FORM1";
textBox1.AppendText("SOME TEXT");
}
}
I've tried this. My textbox is set to fill so it fills up the whole form. I set the multi-line propery to true and dock property to fill.
From what I can try as a first time WinForms user, the Form1_Load should run as soon as the form is created. I've tried some various ways to print text, nothing works. I noticed visual studios says "0 references" next to my function. I'm not sure what this means, maybe part of my issue? Please help.
Having 0 references to method means that it's never used in code. So your issue is that you defined method, which looks like should be executed on form load event, but it's just the definition. I suggest that you copy body of your method to clipboard, go to design page of your form, on the right side, you can browse events, that form generates, find Load event, double-click it, Visual Studio should generate code with empty method definition, paste there your code.
When you right-click your method name and click Find all references you should get something like this at the bottom:
Have you checked following things are done in properties:
Go to Form1->Properties window and check for events.
Now check for Load event and it should be attached to your Form1_Load method.
I have a Windows Forms form where I am trying to show a user control when the form loads. Unfortunately, it is not showing anything. What am I doing wrong? Please see the code below:
AdministrationView wel = new AdministrationView();
public ProgramViwer()
{
InitializeComponent();
}
private void ProgramViwer_Load(object sender, System.EventArgs e)
{
formPanel.Controls.Clear();
formPanel.Controls.Add(wel);
}
Please note I added the load event based on what I read in this article:
http://msdn.microsoft.com/en-us/library/system.windows.forms.form.load.aspx
Three ways you can do this - from the form designer, select the form, and where you normally see the list of properties, just above it there should be a little lightning symbol - this shows you all the events of the form. Find the form load event in the list, and you should be able to pick ProgramViwer_Load from the dropdown.
A second way to do it is programmatically - somewhere (constructor maybe) you'd need to add it, something like: ProgramViwer.Load += new EventHandler(ProgramViwer_Load);
A third way using the designer (probably the quickest) - when you create a new form, double click on the middle of it on it in design mode. It'll create a Form load event for you, hook it in, and take you to the event handler code. Then you can just add your two lines and you're good to go!
You got half of the answer! Now that you created the event handler, you need to hook it to the form so that it actually gets called when the form is loading. You can achieve that by doing the following:
public class ProgramViwer : Form{
public ProgramViwer()
{
InitializeComponent();
Load += new EventHandler(ProgramViwer_Load);
}
private void ProgramViwer_Load(object sender, System.EventArgs e)
{
formPanel.Controls.Clear();
formPanel.Controls.Add(wel);
}
}
I'm not able to get a basic click listener to work.
I've created a base button with the (Name) of button1.
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, System.EventArgs e)
{
MessageBox.Show("button1 was clicked");
}
When I run the application and click my button it doesn't fire. I'm struggling to figure this out because I'm following the guide outlined here: http://msdn.microsoft.com/en-us/library/dfty2w4e.aspx
It appears you're missing this line button1.Click += new EventHandler(button1_Click);, you should add this in the forms constructor.
If you go through the UI designer you can just drag the button onto the UI, then double click it and it will create the listener for you; everything you have there, plus the line above in the designer file, minus the MessageBox.Show(). This is the route I would recommend for creating all of your standard listeners.
If you click on the button on your form in the designer and view properties and select the events section, do you see a value next to the event "Click"? You should see the value "button1_click". If you don't see this, then that is your problem. You should be able to click the dropdown and select the button1_click event.
I have a winform with a button that the user clicks when they want to generate a certain report. When this button is clicked, another winform opens up. The second winform has a text box and a button to take you back to the first winform.
When the second from opens up, I want the text box to already have the report displayed. Therefore, all the user has to do is is look at it and go back to the previous form when finished.
To do this, would I assign the text box to the appropriate method and put it in a Form1_Load event method?
I've never used the Form1_Load event method so I'm a little unsure if this is the proper way of doing it.
Yes, of course, in the Form_Load event you have access to all of your controls already Initialized by the form constructor via InitializeComponent().
Then you can call
private void Form_Load(object s, EventArgs e)
{
textBox1.Text = "your_report_title";
}
Yes, this would be the correct use of Form1_Load().
private void Form1_Load(object sender, EventArgs e)
{
textbox1.Text = "Whatever is supposed to go here"
}
Alternatively you can use the constructor of the form which should already be there.
public Form2(string text)
{
InitializeComponent();
textBox1.Text = text;
}
Then just open the form using
Form2 form2 = new Form2("text that should be displayed");
form2.Show();
I have a Windows Forms form where I am trying to show a user control when the form loads. Unfortunately, it is not showing anything. What am I doing wrong? Please see the code below:
AdministrationView wel = new AdministrationView();
public ProgramViwer()
{
InitializeComponent();
}
private void ProgramViwer_Load(object sender, System.EventArgs e)
{
formPanel.Controls.Clear();
formPanel.Controls.Add(wel);
}
Please note I added the load event based on what I read in this article:
http://msdn.microsoft.com/en-us/library/system.windows.forms.form.load.aspx
Three ways you can do this - from the form designer, select the form, and where you normally see the list of properties, just above it there should be a little lightning symbol - this shows you all the events of the form. Find the form load event in the list, and you should be able to pick ProgramViwer_Load from the dropdown.
A second way to do it is programmatically - somewhere (constructor maybe) you'd need to add it, something like: ProgramViwer.Load += new EventHandler(ProgramViwer_Load);
A third way using the designer (probably the quickest) - when you create a new form, double click on the middle of it on it in design mode. It'll create a Form load event for you, hook it in, and take you to the event handler code. Then you can just add your two lines and you're good to go!
You got half of the answer! Now that you created the event handler, you need to hook it to the form so that it actually gets called when the form is loading. You can achieve that by doing the following:
public class ProgramViwer : Form{
public ProgramViwer()
{
InitializeComponent();
Load += new EventHandler(ProgramViwer_Load);
}
private void ProgramViwer_Load(object sender, System.EventArgs e)
{
formPanel.Controls.Clear();
formPanel.Controls.Add(wel);
}
}