I have 2 forms
Form1
Form2
I have one button in Form1
private void button1_Click(object sender, EventArgs e)
{
Form2 f2 =new Form2();
f2.ShowDialog();
f2.Dispose();
}
but issue is while opening form it's bliking and diasparing
i have tried to use show() also but not solved the problem
If i have not used Disposed method then first time when run the form it appering and disappered but sencond time onward by clicking on button it's working fine...
In Form2_Load event i am using this two property
private void Form2_Load(object sender, EventArgs e)
{
this.RightToLeft = RightToLeft.Yes;
this.RightToLeftLayout = true;
}
Don't change the form layout while its loading. Change it before you launch. Remove the code from Form2_Load and put it in button1_Click:
private void button1_Click(object sender, EventArgs e)
{
Form2 f2 =new Form2();
f2.RightToLeft = RightToLeft.Yes;
f2.RightToLeftLayout = true;
f2.ShowDialog();
}
I would guess you want to show and close the form2 using the same button. And I doubt your initial problem description
"issue is while opening form it's bliking and diasparing"
I think form2 is not 'blinking' while opening, but is 'blinking' while you try to click the button again in form1
ShowDialog() will exit your execution after u called it. Mean, it will exit the execution after you click the button.
Thus, you should try Show() with conditional statement within the button click event
In form1.cs
bool flag = false;
Form2 frm2;
private void button1_Click(object sender, EventArgs e)
{
if (flag == false)
{
frm2 = new Form2();
frm2.Show();
frm2.Load += new EventHandler(frm2_Load);
frm2.FormClosed += new FormClosedEventHandler(frm2_FormClosed);
flag = true;
}
else
{
frm2.Close();
flag = false;
}
}
void frm2_Load(object sender, EventArgs e)
{
//set what ever properties you like
}
void frm2_FormClosed(object sender, FormClosedEventArgs e)
{
flag = false;
}
See also: A dialog disables all of the windows that your program displays
Remove this Property
this.RightToLeft = RightToLeft.Yes;
and run your form...
Try This :
private void button1_Click(object sender, EventArgs e)
{
using(Form2 f2 =new Form2())
{
f2.ShowDialog();
}
}
Related
The Form1 of my App is a login page that i want to:
- show on some conditions
- hide and show Form2 on some conditions
I can hide/show a form by the button click event like so,
private void button1_Click(object sender, EventArgs e)
{
Form2 f2= new Form2();
f2.Show();
this.Hide();
}
but the same technique does not work for Form1_Load.
I have tried the first example in this thread,
Program.cs
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run();
}
Form1
private void Form1_Load(object sender, EventArgs e)
{
Form2 f2= new Form2();
f2.Show();
this.Hide();
}
but it's not showing neither Form1 or Form2, and i don't see how it could. The second example i can't understand how i can implement, and the next google results are even more confusing.
Please help i'm stuck on this for 2 hours.
In the last line in program.cs you must type new Form1() between the parenthesis. So, your program.cs code is as follow:
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}
C# can not hide form in form_load evant Apparently.
To resolve Hide problem, you can use of a timer and hide the form in tick event. i.e.:
Timer timer = new Timer();
private void timerTick(object sender, EventArgs e)
{
timer.Enabled = false;
this.Hide();
}
private void Form1_Load(object sender, EventArgs e)
{
timer.Tick += new EventHandler(timerTick);
timer.Interval = 10;
Form2 frm = new Form2();
frm.Show();
timer.Enabled = true;
}
This works. I tested it.
I hope this will be useful.
Hello You Can Use This
private void button1_Click(object sender, EventArgs e)
{
Form2 f2= new Form2();
if(condition==true)
{
this.Hide();
f2.ShowDialog();
this.Close();
}
}
Why don't you reverse the order of your forms? Start with the main form in the main method.
Application.Run(new Form2());
Now in the constructor of Form2 call the login form with ShowDialog and set the result of the login in a global variable inside the Form2
public class Form2:Form
{
private bool _isValidated = false;
public Form2()
{
InitializeComponent();
// Add here the conditions to check if you don't want to
// run the login process...
// if(loginNotRequired)
// _isValidated = true;
// else
using(Form1 fLogin = new Form1())
{
// This blocks until the user clicks cancel or ok buttons
DialogResult dr = fLogin.ShowDialog();
if(dr == DialogResult.OK)
_isValidated = true;
}
}
Now in the Form2.Load event check the status of your login and close the Form2 if the login is not successful
private void Form2_Load(object sender, EventArgs args)
{
if(!_isValidated)
this.Close();
else
.....
}
I have main form which has several buttons, each button opens new form. When i click button1, form1 opens and when i click button2, form2 opens but form1 goes back to the main form. I want functionality such that each new form opens over the parent form and the most recent form on the top.
This is my code
private void button1_Click(object sender, EventArgs e)
{
Form1 form = new Form1();
form.Show();
}
private void button2_Click(object sender, EventArgs e)
{
Form2 form = new Form2();
form.Show();
}
private void button3_Click(object sender, EventArgs e)
{
Form3 form = new Form3();
form.Show();
}
Each form has a topmost property, just set them to true
private void button1_Click(object sender, EventArgs e)
{
Form1 form = new Form1();
form.Show();
form.TopMost = true;
form.Activate();
}
private void button2_Click(object sender, EventArgs e)
{
Form2 form = new Form2();
form.Show();
form.TopMost = true;
form.Activate();
}
private void button3_Click(object sender, EventArgs e)
{
Form3 form = new Form3();
form.Show();
form.TopMost = true;
form.Activate();
}
I have been developing project in c#.
It has 2 form and these are connected with between each other.
I want to do that when second form is closed, first form refresh.
If I use Thread's Sleep program will be tired. I want to do this with closing events. How can I do ?(Like java's repaint)
Codes are below:
Form1
public static Form1 form;
public Form1()
{
InitializeComponent();
form = this;
}
private void button11_Click(object sender, EventArgs e)
{
Form2 yeniform = new Form2();
yeniform.Show();
}
Form2(Close Button)
private void button1_Click(object sender, EventArgs e)
{
Form1.form.Invalidate();
Form1.form.Refresh();
this.Close();
}
Bind Form_Closing event in your first form.
//Form1
private void button11_Click(object sender, EventArgs e)
{
Form2 yeniform = new Form2();
yeniform.FormClosing += new FormClosingEventHandler(this.Form2_FormClosing);
yeniform.Show();
}
private void Form2_FormClosing(object sender, FormClosingEventArgs e)
{
//Do your stuff here.
}
' button in the second form which is to be closed
' form1 is the form which is to be re loaded when form 2 is closed
private void btn_close_Click(object sender, EventArgs e)
form1.close() 'unload form 1 before closing form2
form1.show() ' form 1 reloading
unload(me) 'closing form2
end sub
This is a working sample. In parent form
private void barButtonItem1_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
VendorsAddForm f = new VendorsAddForm();
f.StartPosition = FormStartPosition.CenterScreen;
f.FormClosed += new FormClosedEventHandler(child_FormClosed);
f.Show();
}
void child_FormClosed(object sender, FormClosedEventArgs e)
{
this.Refresh();
var query = dbContext.AccountObjects.Where(p => p.IsVendor == true).ToList();
accountObjectsBindingSource.DataSource = new BindingList<AccountObject>(query);
}
Note: child form is VendorsAddForm
Thank to https://www.daniweb.com/posts/jump/1302760 , I learned from there.
I have 2 Winforms (on Visual C#). On Form1 I have a button and when the user clicks it, I want the text of Form2 to change,before I open Form2 (The text that appears on the top left cornet of my Winform).
I tried these (1) (2) but they don't work.
On Form2 I have
public string formtext
{
get {return this.Text;}
set {this.Text = value;}
}
This is my button on Form1
public void kryptonButton2_Click(object sender, EventArgs e)
{
// Form2
Form2 form2 = new Form2();
form2.Text = "Η πόλη του Πειραιά";
}
Note that I click that button to change the text and then I click on another button to open Form2.
Form2 opens, but the text isn't changed.
Your Form2 instance has to be accessible from your text changing routine.
private Form2 m_form2;
public Form1() {
InitializeComponent();
m_form2 = null;
}
Now that you have the ground work laid, you will need to call your m_form2 object using Show() and NOT ShowDialog():
private void ShowForm2(string optionalText) {
if (m_form2 == null) {
m_form2 = new Form2();
m_form2.Show();
} else {
m_form2.Focus();
}
if (!String.IsNullOrEmpty(optionalText)) {
m_form2.Text = optionalText;
}
}
With this setup, your button should work for Form2 by modifying your routine to do this:
public void kryptonButton2_Click(object sender, EventArgs e) {
ShowForm2(null);
m_form2.Text = "Η πόλη του Πειραιά";
}
OR using the optionalText parameter:
public void kryptonButton2_Click(object sender, EventArgs e) {
ShowForm2("Η πόλη του Πειραιά");
}
You could also do this using delegates. This is a very powerful feature of C#. If you would like to see a code example of that, look at my answer to this question here:
https://stackoverflow.com/a/19146929/153923
UPDATE
It sounds like you may only need an updated version of Mike Cheel's answer.
Try:
public void kryptonButton2_Click(object sender, EventArgs e) {
Form2 form2 = new Form2();
form2.formtext = "Η πόλη του Πειραιά";
form2.Show(); // Mike left this part out
}
Try:
public void kryptonButton2_Click(object sender, EventArgs e)
{
// Form2
Form2 form2 = new Form2();
form2.formtext = "Η πόλη του Πειραιά";
}
There are a couple of reasons why your approach doesn't work.
public void kryptonButton2_Click(object sender, EventArgs e)
{
Form2 form2 = new Form2(); //<-- this is a new instance for Form2
form2.Text = "Η πόλη του Πειραιά"; //<-- and this is not your propery
//(as pointed out by #MikeCheel)
}
If you have no instance of Form2 then you could try and get it from Application.OpenForms but that is a HACK.
var frm2 = Application.OpenForms.Cast<Form>()
.FirstOrDefault(c => c.Name == "Form2");
if(frm2 != null)
form2.formtext= "Η πόλη του Πειραιά";
When you click the other button to open the form you need to hold onto the reference to it, so that your other button click event can use it:
private Form2 child;
public void openOtherForm_Click(object sender, EventArgs e)
{
child = new Form2();
child.Show();
}
Now you can use that field to manipulate it:
public void kryptonButton2_Click(object sender, EventArgs e)
{
form2.formtext = "Η πόλη του Πειραιά";
}
My mainForm contains two buttons(btnLoad & btnChange) and a panel
When the btnLoad is clicked, it loads the other forms(there are 5 different froms with different controlers) into the panel. Let me assume one of it named Form2 which contains a label(labelMessage)
My problem is, when I click the btnChange the following statement won't work.
f2.labelMessage.Text = "Button Change Clicked";
My codes are
// codes on mainFrom
private void btnChange_Click(object sender, EventArgs e)
{
Form2 f2 = new From2();
f2.labelMessage.Text = "Button Change Clicked"; //labelMessage's modifier is public
}
private void btnLoad_Click(object sender, EventArgs e)
{
panelDock.Controls.Clear();
Form f2 = new Form2();
f2.TopLevel = false;
panelDock.Controls.Add(f2);
f2.Show();
}
is this wrong?
Since Form2 is already shown you should use Application.OpenForms instead of creating a new instance of Form2
private void btnChange_Click(object sender, EventArgs e)
{
Form2 f2 = (Form2)Application.OpenForms["Form2"];
f2.labelMessage.Text = "Button Change Clicked"; //labelMessage's modifier is public
}
From your comment that Form2 is in a panel you can try
private void btnChange_Click(object sender, EventArgs e)
{
Form2 f2 = (Form2)panel1.Controls["Form2"];
f2.labelMessage.Text = "Button Change Clicked"; //labelMessage's modifier is public
}