Im currently facing the problem that when i try to set focus on some control (textBox), nothing happens, maybe i just overlooked something.(somewhere i found that focus is "low-level" method and that select() should be used instead, however, it doesnt work as well)
From form Login, i launch new instance of EncryptPSW form
private void openToolStripMenuItem_Click(object sender, EventArgs e)
{
EncryptPSW ePSW = new EncryptPSW();
ePSW.setOsLog(false, this);
ePSW.ShowDialog();
}
On Button(which is located on EncryptPSW form ) click event i call fill method
public void fill()
{
if (textBoxPSW.Text.Length == 8)//psw has to be 8 chars long
{
if (save)//determinating whether save or fetch of data should be done
{ login.launchSave(textBoxPSW.Text,this); }
else { login.launchOpen(textBoxPSW.Text,this); }
}
else { MessageBox.Show("The password must contain 8 characters");}
}
Which launches either save or open method from Login (my problem is just with open, since during save i dont need to do anything with Focus)
public void launchOpen(string psw,EncryptPSW ePSW)
{
ePSW.Close();
Encryptor.DecryptFile("loggin.bin", psw, this); //decrypting data and setting textBoxes Text property into the fetched ones
setFocus();
}
After all the work is done, setFocus() should be called in order to set focus and other properties.
public void setFocus()
{
textBoxDatabase.Focus();
textBoxDatabase.SelectionStart = textBoxDatabase.TextLength - 1;
textBoxDatabase.SelectionLength = 0;
}
I tried so many different ways, like:
Calling setFocus() from within EncryptPSW_FormClosed
Calling whole open process after the EncryptPSW is closed (from within EncryptPSW_FormClosed)
and many more, however i dont remember it all.
In the case of Form_Closed the weird thing is, that when i tried to show a message box from there instead of setting focus (just to see where the problem might be), it's showed before the EncryptPSW form is closed.
My only guess about this is that the instance of EncryptPSW is somehow blocking Login form and it's controls
I hoped i described my problem well enough and that it makes at least a bit of sense ;]
Thanks in advance,
Regards,
Releis
Since the textbox is in the login form, and you are opening the EcryptPWS from it as a dialog (child), your login form will not be able to set focus to anything. You will need to set focus after it is closed. You can do this:
private void openToolStripMenuItem_Click(object sender, EventArgs e)
{
using(EncryptPSW ePSW = new EncryptPSW())
{
ePSW.setOsLog(false, this);
if (ePSW.ShowDialog() == DialogResult.OK)
{
textBoxDatabase.Focus();
}
}
}
public void launchOpen(string psw,EncryptPSW ePSW)
{
ePSW.DialogResult = DialogResult.OK;
ePSW.Close();
Encryptor.DecryptFile("loggin.bin", psw, this); //decrypting data and setting textBoxes Text property into the fetched ones
}
OK this maybe the ugliest thing I saw round this but.
using
public void setFocus()
{
textBoxDatabase.Focus();
textBoxDatabase.SelectionStart = textBoxDatabase.TextLength - 1;
textBoxDatabase.SelectionLength = 0;
}
Change your code at
public void launchOpen(string psw,EncryptPSW ePSW)
{
ePSW.Close();
Encryptor.DecryptFile("loggin.bin", psw, this); //decrypting data and setting textBoxes Text property into the fetched ones
setFocus();
}
to
delegate void settingfocus();
public void launchOpen(string psw,EncryptPSW ePSW)
{
ePSW.Close();
Encryptor.DecryptFile("loggin.bin", psw, this); //decrypting data and setting textBoxes Text property into the fetched ones
settingfocus sf = new settingfocus(setFocus);
this.BeginInvoke(sf);
}
This worked for me
(Sorry for apparently thinking insert "this" before procedure, and change line x to this was legable)
Related
I'm trying to pass a variable from one form to another form textbox. The 'variable' is a result of a calculation based on the user inputs.
Below is the code for the parent form(RuleInsertForm) where I'm calling the subform(Helpformula) to get the user inputs.
public partial class RuleInsertForm : Form
{
public string helpformulainputs;
}
private void RuleInsertForm_Load(object sender,EventArgs e)
{
if (helpformulainputs=="")
{
textBox_Inputs.Text = "";
}
else
{
textBox_Inputs.Text = helpformulainputs;
}
}
Below is the code for the subform(Helpformula) where i'm passing the result variable(formulainputs) to the parent form(RuleInsertForm).
public partial class HelpFormula : Form
{
public string formulainputs = string.Empty;
private void button_generateformula_Click(objectsender, EventArgs e)
{
using (RuleInsertForm insertform = new RuleInsertForm())
{
insertform.helpformulainputs = formulainputs;
this.Close();
insertform.Show();
}
}
}
Problem:
The values are getting passed to the text box but in the UI its not getting dispalyed.
so far I tried to push data back to parent form and then tried to display the data in the textbox where I failed.(I dont know where it went wrong suggest me if I can resolve the below one)
Now I need an alternative method to this for eg: instead of pushing the data back to parent form i need to make the variable available for all the forms trying to use the subform(formulainputs)
How can I acheive this process ? any suggestions are much appreciated.
The problem seems to be that insertForm.Show() does not block the execution of your button handler. Show opens the insertform as non-modal.
So after insertform is opened, the execution is continued in button_generateformula_Click and when you exit the using block, the insertform is disposed and therefore closed.
To solve this you may call insertForm.ShowDialog() instead.
For different ways of communicating between Forms look here or simply type communicate between forms into the SO search box.
Ok so I'm attempting to create a simple game. In a nutshell it's a resource management game where the player will attempt to manage a thieves guild. In regards to running missions I've created a Thief class, a new instance of which is created when a new thief is recruited. I have coded within the thief class the ability to gain experience and level up.
Here's my specific problem:
I want the player to be able to select which thief/thieves to send on a mission. I have thought about it and figured that opening a new form and populating it with checkboxes is the easiest way to allow this. These checkboxes will be related to a List<thief> of thieves, the player then checks the thieves s/he wants to send and these are then stored in another List<thief> and passed on to the run mission function.
I've built a separate project with the intention of testing and playing around with this before putting it into the main program. The test project consists of two forms: The first (frmMain) with a textbox to hold the selected options and a button to open the second form (frmSelect). Currently I can open and populate the second form (frmSelect) but when I try to add the checked options to the textbox I simply...well can't.
So far I have tried directly accessing the textbox by typing frmMain.txtOptionsDisplay in the cs file of frmSelect but it causes the following error:
An object reference is required for the non-static field, method or
property
I tried to create a new form in frmSelect and make it equal to the active instance of frmMain with: Form frmTemp = frmMain.ActiveForm; and then alter the textbox using frmTemp as a go-between but that produced the error:
'System.Windows.Forms.Form' does not contain a definition for
'txtOptionsDisplay'.
Having searched both google and stackoverflow forums I've encountered answers that I either have never heard of (Threading) or answers that I kind've recognise but can't interpret the code pasted to make it relevant to my problem (delegates).
Any advice or pointers would be fantastic.
EDIT:
frmMain code:
public frmMain()
{
InitializeComponent();
selections.Add("Option 1");
selections.Add("Option 2");
}
private void btnClick_Click(object sender, EventArgs e)
{
frmSelectOptions.Show();
int length = selections.Count();
for (int i = 0; i < length; i++)
{
CheckBox box = new CheckBox();
box.Text = selections[i];
box.AutoSize = true;
box.Location = new Point(50, 50*(i+1));
frmSelectOptions.grpControls.Controls.Add(box);
}
}
public void updateText(string option)
{
txtOptionsDisplay.Text += option;
}
}
frmSelect code:
public List<CheckBox> selectedOptions = new List<CheckBox>();
Form frmTemp = frmMain.ActiveForm;
public frmSelect()
{
InitializeComponent();
}
private void btnSelect_Click(object sender, EventArgs e)
{
foreach (CheckBox box in grpControls.Controls)
{
if (box.Checked == true)
selectedOptions.Add(box);
}
this.Hide();
}
}
I hope this formats correctly... I'm kinda new and don't know how to indent. Oh look there's a preview...
Does this help?
Your problem is that controls defined within a form by default receive the private access identifier. Hence you could just add a property along the lines of
public ControlType ProxyProperty {
get {
return txtOptionsDisplay;
}
}
Besides from that you should think about wether what you're trying is actually a good solution. Manipulating forms from one to another will become a huge clusterfuck in terms of maintenance later on.
I'd suggest using the Singleton pattern for your frmMain. This will help safeguard you from accidentally launching another instance of frmMain and at the same time, will give you access to frmMain's objects. From there, you can either write accessors to Get your txtOptionsDisplay or you can make it public. Below is an example:
public class frmMain
{
private static frmMain Instance = null;
private static object LockObj = new object();
public static frmMain GetMain()
{
// Thread-safe singleton
lock(LockObj)
{
if(Instance == null)
Instance = new frmMain();
return Instance;
}
}
public string GetOptionsDisplayText()
{
return txtOptionsDisplay.Text;
}
}
public class frmSelect
{
private void frmSelect_Load(object sender, EventArgs e)
{
// Set whatever text you want to frmMain's txtOptionsDisplay text
txtDisplay.Text = frmMain.GetMain().GetOptionsDisplayText();
}
}
If you do go this route, don't forget to update Program.cs to use frmMain's singleton.
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
// Application.Run(new frmMain()); - Old method
Application.Run(frmMain.GetMain());
}
I've been trying to reset my current form to it's original state by closing it, and opening a new one. I want the form objects to be reset,the variables to be re-declared, the class objects to be cleared etc I've got everything working but the class being cleared, no matter what I do it won't create a new one with blank data.
Here is my code:
if (btnRandom.Text == "Reset")
{
SetupScreen form = new SetupScreen();
form.Show();
this.Dispose();
//Create new class for form / or launch load events as normal
form.Mybattleship = new battleship()
form.SetupScreen_Load(this, null);
}
I've tried many methods over the internet and none have worked.. even the overly complicated ones..
Oh I forgot to mention I need the new form to act as if it's just been loaded as normal, so the load events etc trigger
You would be better off making a method that you can call that will set default values for items that you can use when opening form and resetting...
public SetupScreen()
{
InitializeComponent();
SetDefaultValues();
}
private void SetDefaultValues()
{
//start values..
}
public void ResetBtn_Click(object sender, EventArgs e)
{
SetDefaultValues();
}
I am using a method sice I will have alot of child forms. Now it does show when I call a form by clicking on a button, but not after the login child is closed.
Method:
private void mForms(Form f)
{
if (this.MdiChildren.Contains(f))
{
f.WindowState = FormWindowState.Normal;
}
else
{
f.MdiParent = this; f.Show();
}
}
This just simply checks if the MDIcontainer already contains the requested form. If yes, put it back up again (in case it's minimized), if not, show it.
Now I can call the forms using this:
private void ts_bestand_studenten_add_Click(object sender, EventArgs e)
{
if (add_student.IsDisposed)
{
add_student = new add_student();
}
mForms(add_student);
}
This checks if it is disposed already or not. If so, redefine it. Then it calls to the method to open the right form. This works as it should.
Now the problematic part:
After the login screen is closed and user is logged in, the userlevel is defined. I should be able to open another form. This is the method I use for that: (NOTE: the userlevels work fine since it does reach the Messagebox)
// Predefines start_screen_admin
Form start_screen_admin = new start_screen_admin();
public void mCommitRights()
{
if (userlevel.gCheckLevel == 0)
{
// Admin, no changes
MessageBox.Show("Admin");
mForms(start_screen_admin);
}
... more of the same to check for userlevels
}
Now you think this should work. I don't have to redefine it because it's the first time it opens and it is already predefined. The MessageBox shows, but the form does not. I really can't see a problem in this. I tried everything I could think of..
I think you need to include the Select() method to bring the form to the front:
Try changing it to this:
private void mForms(Form f) {
if (this.MdiChildren.Contains(f)) {
f.WindowState = FormWindowState.Normal;
f.Select();
} else {
f.MdiParent = this;
f.Show();
}
}
I'm still stuck.
Assume that I've got a user control with a button. And an event called damnIt_ButtonClicked.
In the main window I want to emulate the control's lifetime like it is a modal dialog, although it's not.
I want to wrap everything into one method, it returns true if the Button on the control clicked.
public bool Show() {
var control = new ControlWithSingleButton();
bool result;
control.damnIt_ButtonClicked += (object sender, EventArgs args) =>
{
result = true;
};
MainWindowGrid.Children.Add(control);
MainWindowGrid.Visibility = Visibility.Visible;
return result;
}
Now. As you see the problem is this method will return always false;
But I need to return a result only when damnIt_ButtonClicked event fires. It means I have to put the thread on wait, till the user clicks button.
Right? Or how it should be done. Help me please....
You're going to need to re-architect your solution. Without knowing a broader scope of what you're trying to do, here's a possible solution.
private bool buttonResult;
public void Show() {
var control = new ControlWithSingleButton();
bool result;
control.damnIt_ButtonClicked += (object sender, EventArgs args) =>
{
this.ProcessButtonClick();
};
MainWindowGrid.Children.Add(control);
MainWindowGrid.Visibility = Visibility.Visible;
}
private void ProcessButtonClick()
{
this.buttonResult = true;
//do whatever you would have before if Show had returned true
}
You know what? I give up!
I decided to make the control a window, although it was strictly prohibited in given specifications to use any other windows but the Main. Anyway it's gonna be a chromeless, borderless transparent window, so nobody can see the difference.
Thank you so much.