I'm new to Visual Studio & C#, still trying to learn.
I have two forms Form 1 and 2
Click on a label in form 1 will go to form 2.
private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
{
linkLabel1.LinkBehavior = System.Windows.Forms.LinkBehavior.NeverUnderline;
(new Form2()).Show(); this.Hide();
}
However for form 2, the color of the label text changes to light grey text even though the ForeColor properties is black.
Am i missing out something here? Thank you.
Update: Seems like the text in form 2 appears but it is disabled (greyed out). Is there a way to enable the label? Not sure why is it even disabled in the first place.
Managed to resolve my issue.
Error msg: forms that are not enabled cannot be displayed as a modal dialog box
The form was not enabled, so i had to enable it
oneDriveForm.Enabled = true;
Full code below
private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
{
linkLabel1.LinkBehavior = System.Windows.Forms.LinkBehavior.NeverUnderline;
SubOneDriveForm oneDriveForm = new SubOneDriveForm();
oneDriveForm.Enabled = true;
oneDriveForm.ShowDialog();
}
Reference:
Button enabling not working correctly
Related
I'm trying to make it to where a panel becomes visible and it sent to the front so it can be seen and interacted with, like this.
private void SettingsButton_Click(object sender, EventArgs e)
{
SettingsPanel.Visible = true;
SettingsPanel.BringToFront();
}
The problem is that after clicking a few of the buttons, it will either display the wrong panel or none at all. Is there a way to fix this?
EDIT: Before y'all ask, i'm using WinForms.
OK, so I was wrong, WinForms is smarter than I thought. Here's a test you can do. I'm not exactly sure what you are trying to do, but this should help you along. To start, we're going to build a small WinForms app. With one exception, we aren't going to set any properties of the controls we drop on the screen:
Create a new WinForms app
In the designer, drop a Panel (which will be named panel1) on the form
In the properties pane, set the BorderStyle to FixedSingle (that's the only property we are going to set)
Make two copies of that panel (panel2 and panel3). Position them so that panels do not overlap at all.
On each panel drop a couple of controls (I put labels (labels 1-3) and textboxes (also 1-3)) on each one
Beside each panel (arranged so that there is no overlap) drop three buttons on the form (buttons 1-3) make it so that visually, each button is associated with the similarly numbered panel
Duplicate panel3 including its contained controls (so that you get panel4, label4 and textbox4). Position the duplicate so that it significantly overlaps panel 3
Now we're going to look at the code that the designer creates for your form. Don't mess with this code (you can, but if you don't know what you are doing, it can turn out bad - and, we're keeping this simple).
In the Solution Explorer click the unfilled triangle to the left of Form1.cs. Note that it rotates and turns solid. Also note that Form1.Designer.cs is displayed. That's a normally hidden source file that contains all the designer created code that corresponds with the form and the controls you dropped on it.
Open Form1.Designer.cs
Click the little grey plus sign icon next to Windows Form Designer generated code
Inspect the file. Note that every action you did in the designer has a corresponding line of code in the Designer.cs file (more or less)
Look at the code for one of the panels (say panel1).
See that it includes:
this.panel1.Controls.Add(this.textBox1);
this.panel1.Controls.Add(this.label1);
Scroll all the way down to the Form1 code and see that the panels and buttons get added to the Form's Controls collection:
Like:
this.Controls.Add(this.button3);
this.Controls.Add(this.button2);
this.Controls.Add(this.button1);
this.Controls.Add(this.panel4);
this.Controls.Add(this.panel3);
this.Controls.Add(this.panel2);
this.Controls.Add(this.panel1);
Note that the order is reversed. The order is important, it sets the Z-Order (i.e., what overlaps what) for the form and the controls on the form.
Wiring up the buttons
Select all three buttons and press <Enter>. This will open the Form1.cs file and generate three button click handlers that you can fill in.
Use this code for the three button handlers:
private void button1_Click(object sender, EventArgs e) {
var wasVisible = panel1.Visible;
panel1.Visible = !wasVisible;
}
private void button2_Click(object sender, EventArgs e) {
panel2.BringToFront();
}
private void button3_Click(object sender, EventArgs e) {
panel3.BringToFront();
}
The first one will toggle the first panel's visibility (I put in an extra variable so you can set a breakpoint and see what's going on). The second one brings panel2 to the front, changing its Z-Order (it's called Z-Order because the position on the screen is measure in X and Y, which the overlap position is related to the "depth" of the screen, or the Z-coordinate). The last one does the same thing to panel3.
Run the program.
When you press the first button, the first panel and its controls disappear (this surprised me, WinForms is smarter than I thought)
When you press the second button, nothing appears to happen. This is because the only thing that panel2 intersects is the form, and panel2 already covers the form, so you don't see any effect. (and because WinForms is smarter than I thought)
When you press the third button, panel2 (and it's controls) jump to the front of the stack of controls, covering the intersecting part of panel4.
Does this help you understand how Visible and BringToFront() work?
What you're describing is similar to a TabControl alternative. Here's an example:
You can manage the current panel simply by making it visible and docked to fill. Hide the other panels.
public partial class FormTabsAlternative
: Form
{
int m_current = 0;
List<Panel> m_tabs = new List<Panel>();
public FormTabsAlternative()
{
InitializeComponent();
AddTab(pnl1);
AddTab(pnl2);
AddTab(pnl3);
AddTab(pnl4);
SetUpTabsAndButtons();
}
private void AddTab(Panel pnl)
{
m_tabs.Add(pnl);
pnl.Dock = DockStyle.Fill;
}
private void OnLeftClick(object sender, EventArgs e)
{
if (m_current > 0)
{
m_current--;
SetUpTabsAndButtons();
}
}
private void OnRightClick(object sender, EventArgs e)
{
if (m_current < m_tabs.Count - 1)
{
m_current++;
SetUpTabsAndButtons();
}
}
private void SetUpTabsAndButtons()
{
for (int index = 0; index < m_tabs.Count; index++)
{
var panel = m_tabs[index];
panel.Visible = index == m_current;
}
btnLeft .Enabled = m_current > 0;
btnRight.Enabled = m_current < m_tabs.Count - 1;
}
}
In my application I am displaying a new form which needs to be at TopLevel.
So, I am setting
someForm.TopLevel = true;
Now, I have a checkbox, which will allow user to set it to "not a top level".
When unchecked, i want to set TopLevel = false
But when I do this, my form disappears. Does anyone know why?
Here is my code:
private void stayOnTop_CheckedChanged(object sender, EventArgs e)
{
this.TopLevel = this.stayOnTop.Checked;
}
Because your checkbox is named stayOnTop, I assume you want to set the TopMost property instead of TopLevel.
The setting TopLevel is only meaningful in MDI applications - ones where a parent form has one or more child forms inside it (like Word and Excel used to work).
TopLevelControl is the main form of your application. By setting TopLevel to false the TopLevelControl is set to null. In that case there is no main form to display for your application. If you add a timer that will switch it back to true you will see that it appears again. (It is interesting though that there is no preventing mechanism. For instance it's not possible to add a top level form to another top level form. But you are allowed to get rid of top levels forms entirely.)
So that's why it disappears. If you want it only sent to background you can use SendToBack() method. It will change Z-index of the form. So if there is a window behind your control, the control will be moved behind the window.
Try these codes :
private void stayOnTop_CheckedChanged(object sender, EventArgs e)
{
if(e.checked == true)
{
someForm.TopLevel = false;
}
else
{
someForm.TopLevel = true;
}
}
What I need to achieve is very simple. I have the following PhoneTextBox in a Windows Phone 8 application. When the TextBox has focus I need the LengthIndicatorVisible to be true and when it loses focus i don't want it there.
<toolkit:PhoneTextBox x:Name="TextBox1" MaxLength="480" GotFocus="TextBox1_GotFocus" LostFocus="TextBox1_LostFocus"/>
The focus methods are as follow:
private void TextBox1_GotFocus(object sender, RoutedEventArgs e)
{
TextBox1.LengthIndicatorVisible = true;
TextBox1.TextWrapping = TextWrapping.Wrap;
}
private void TextBox1_LostFocus(object sender, RoutedEventArgs e)
{
TextBox1.LengthIndicatorVisible = false;
TextBox1.TextWrapping = TextWrapping.NoWrap;
}
When it gets focused and I type something the Length Indicator is displayed as it should. Now when it loses its focus even though the LostFocus() method is being called the Length Indicator remains.
Also if I put an ActionIcon the textbox size due to TextWrapping gets bigger but when the text is cleared it does NOT return to its default size (height actually)
I have searched around for similar behavior but it is said to have been fixed on the latest release (the one i use - Toolkit).
Anyone has a clue of what is wrong here?
Thanks in advance.
I have a problem, I have a main form and I put a picturebox on it. Then I create a child form, I want to bring it to front of picturebox.
Like History box in this picture
can anyone help me!!
p/s: English is not my native English so can have some errors
mdiChildForm.BringToFront() should fix the issue.
You could try use mdiChildForm.Activate();
which is equivilant to:
this.TopMost = true;
this.Focus();
this.BringToFront();
this.TopMost = false;
How to use: Here
Source: Here
That doesn't look like a MDI application...
At any rate, the "History" box in that image is a "Tool Window". Set its FormBorderStyle() property to "FixedToolWindow", its ShowInTaskBar() property to false, and set its Opacity() property to 70 or 80.
Then display it by passing in the "owner" like this:
private void MainMdiForm_Load(object sender, EventArgs e)
{
History hist = new History();
hist.Show(this);
}
When you use MessageBox.Show() you have a selection of MessageBoxButtons to choose from. The buttons available are an enum, and give you options like "Yes No", "OK Cancel", etc.
When I am using, for instance, Norwegian message text the user still gets the English "Yes No".
Is there a way to change the text of the buttons (in C#) so that the language is correct? Can I override the text, or set the current locale in some way so that I can have "Ja Nei" instead of "Yes No"?
I do not want to rely on installing a .NET language pack at my client.
There is no native support for this in .NET (as far as I know, anyway; please correct me if I'm wrong, anyone). I did come across this CodeProject article, that seem to do the trick with some message hooking and P/Invoke:
http://www.codeproject.com/KB/miscctrl/Localizing_MessageBox.aspx
Usually messagebox buttons (as all of Windows) honor the currently set UI language for Windows. So if you've got an English installation and can't change languages (MUI versions or Ultimate for Vista/7) you're out of luck.
You could implement a messagebox yourself but I'd beg you not to. Simple things like common hotkeys for the buttons, having the ability to use Ctrl+Ins to copy the contents, etc. are the ones I miss the most when people start reinventing square wheels.
I don't think it is possible, but refer to the MSDN article MessageBox.Show Method. You may get some ideas. You can change the text in the message box. What about creating your own message box (new form) and displaying them?
You can create a panel (pnlExitMode), with property Visible=false, and put info text as well as buttons (btnYes, btnNo) labeled YES and NO (with button captions in "your" language) onto this panel, then place required Yes/No- actions into the button event handling routines.
At decision time (in my case: warning if ini file not yet written when closing application) set panel to Visible. Panel with buttons will pop up.
Example code:
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if (bIniModified)
{
pnlExitMode.Visible = true; pnlExitMode.BringToFront();
e.Cancel = true;
}
}
private void btnYes_Click(object sender, EventArgs e)
{
SaveToIni();
pnlExitMode.Visible = false; bIniModified = false;
Application.Exit();
}
private void btnNo_Click(object sender, EventArgs e)
{
pnlExitMode.Visible = false; bIniModified = false;
Application.Exit();
}