I have a form with a datagridview inside of it.
When you doubleclick on a row from the datagridview, another form will open, which is basically a form where you can edit the data you just double-clicked.
There are a 3 buttons in this "edit" form, a delete, update and a return to main form button.
When finished with what you were supposed to do on this form, it closes.
My question is;
When this form closes, I want the data that is inside of the datagridview in the main form to refresh, how can I call that function on the main form from the edit form.
Keep in mind that I already have a reload function, let's say it's called refreshData();.
if you open the edit form as a modal window, the ShowDialog() call is blocking, so if you put the refreshData call after that it will execute after the edit form is closed:
var editForm = new EditForm(...);
var result = editForm.ShowDialog();
if (result == DialogResult.OK)
{
refreshData();
}
If you used .ShowDialog(), then just put the refresh function under this line of code.
The program will continue with the
private void cell1_DoubleClick(object sender, System.EventArgs e)
function.
So your code will look similair to this;
private void cell1_DoubleClick(object sender, System.EventArgs e)
{
//Your previous code ....
//The part where you open the EditForm
MyEditForm.ShowDialog();
//After it has been closed the program will continue to execute this function(if it has not been ended yet)
RefreshData();
//Since this function is running from your main form, the function RefreshData() will be executed on your main form aswell
}
No need to check some dialog results at all.
I think this will work:
Add a property DatagridviewForm of type DatagridviewForm (you have probably an other name/type) to AnotherForm. In the part where you call anotherForm.ShowDialog, add the following code:
anotherForm = new AnotherForm();
anotherForm.DatagridviewForm = this;
anotherForm.ShowDialog();
anotherForm.Dispose();
In the close handler of AnotherForm, update or refresh the data:
private void AnotherForm_FormClosed(object sender, FormClosedEventArgs e)
{
DatagridviewForm.refreshData();
}
You can access the data when the form is closing
Form MyEditForm;
private void cell1_DoubleClick(object sender, System.EventArgs e)
{
if (MyEditForm==null)
{
MyEditForm=new MyEditForm();
MyEditForm.FormClosing += refreshData;
}
MyEditForm.ShowDialog();
}
private void refreshData(object sender, EventArgs e)
{
var myDataObj=MyEditForm.getData();
}
Related
well I have a funny problem with closing dialog forms.
here is the problem:
I run application and open second form (through menu strip) as showdialog(); and then from second form open third form. When I open third form by button 1 and then close it everything is alright, but when I open the third form by button 2 and then close it, third form will be closed and then it closes the second form also. !!! In second form when I show a messageBox and close it also the second form will be closed.
here is my codes:
open second form from first form codes:
private void settingsToolMenu_Click(object sender, EventArgs e)
{
settingsForm s1 = new settingsForm(this);
s1.ShowDialog();
}
open third form from second by button 1 form codes:
private void addReportButton_Click(object sender, EventArgs e)
{
addReport a1 = new addReport(this);
a1.ShowDialog();
}
open third form from second by button 2 form codes:
private void editReportButton_Click(object sender, EventArgs e)
{
addReport a2 = new addReport(this);
a2.ShowDialog();
}
as you see there is no differences between button 1 and button 2
here is a video from application running.
Not sure what's happening out there, but there should be .Show() method, which runs a window in a different way including closing strategy. Try it out.
Try This
Instead of
addReport a2 = new addReport(this);
a2.ShowDialog();
Use
addReport a2 = new addReport();
a2.ShowDialog(this);
Then on click of Exit / Close button of dialog window
private void BtnExit_Click(object sender, EventArgs e)
{
this.Dispose();
}
Hope this will solve your issue.
I used this code and it worked. I have 3 forms, the first form is opened when running the app, the second form is opened with a button (can be menustrip, doesn't matter), then the third is opened like that too, after closing the third form the second form remains open.
FormN fm = new FormN();
fm.ShowDialog();
Use that piece of code in every method that is called from clicking on a button and it should work fine. Just change the "FormN" for whatever your forms are named. Also, if you need to pass any form's attributes into the next form you can do this:
Code at first form:
public string mytext; //Variable I want to use later, in Form2.
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
mytext = tb1.Text;
Form2 fm = new Form2(this);
fm.ShowDialog();
}
Notice how I save "tb1"'s (TextBox1) value in a variable before calling "fm.ShowDialog();", so I can use the TextBox1 value later inside the Form2.
Code at second form, having main form's variables (such as "mytext" value).
Form1 mfm;
public Form2(Form1 mainfm)
{
InitializeComponent();
mfm = mainfm;
}
public void button2_Click(object sender, EventArgs e)
{
//In this method I use the variable "mytext" wich is a Form1 attribute.
//You can see how I declare it in the first form's code (see above).
textBox1.Text = mfm.mytext;
}
With this you have created an object of your main form ("Form1 mfm;") with all the variables it contained before calling the second form, which can be used for the third form too.
in second form formClosing() event i wrote these codes:
private void settingsForm_FormClosing(object sender, FormClosingEventArgs e)
{
if(e.CloseReason != CloseReason.UserClosing)
{
e.Cancel = true;
}
}
and nothing can close the second form except user!
I have this syntax on my buton press event, but when I press it - the form does not close.
What is the proper way to close the form on the button press event?
private void btnClose_Click(object sender, EventArgs e)
{
IxalocToes nip = new IxalocToes();
nip.Close();
}
This method btnClose_Click runs inside your forms class
Forms have a method call Close, calling Close() or this.Close() inside the form will close it
private void btnClose_Click(object sender, EventArgs e)
{
IxalocToes nip = new IxalocToes();
nip.Close();
Close();
}
As suggested by many and it is right, calling
this.Close() or
Close()
will close the form. As you want to know why nip.Close() is not working, it's because the button is in a FORM but when you call nip.Close() instead of this.Close(), it will close the new object created, not the one on which the button resides.
I have a C# application in which I need specific or a function to execute on a form after closing the active form.
The form in which I need the code to excute becomes the active form after the previous active form is closed. So in a nutshell after closing this form the form in which I need the event handler or function to run will then become the active form. Is there a way that this is possible?
I have tried the Form_Enter event handler on the form that becomes active after the other form is closed, but that did not work.
I believe you can achieve what you are trying to do more simply. The code you use to show Form2 from Form1 (Main), you can add your code there like so:
Class Form1 {
private void button_click(object sender, EventArgs e) {
Form2 newForm = Form2();
newForm.ShowDialog(); // To prevent the main form carry on
// Your code needed to be excuted
}
}
In the form closing event set the DialogResult as follows:
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
this.DialogResult = System.Windows.Forms.DialogResult.Yes;
}
When you open the form look for the response as follows:
if (Form1.ShowDialog() == DialogResult.Yes)
{
////do stuff.
}
I hope this helps.
I have a combo box in my C# which is place in form named frmMain which is automatically fill when I add (using button button1_Click) a product in my settings form named frmSettings. When I click the button button1_Click I want to reload the frmMain for the new added product will be visible.
I tried using
frmMain main = new frmMain();
main.Close();
main.Show();
I know this code is so funny but it didn't work. :D
This is windows form!
EDIT
Please see this image of my program for better understanding.
This is my frmMain
Here is what my settings frmSettings form look like. So, as you can see when I click the submit button I want to make the frmMain to reload so that the updated value which I added to the settings will be visible to frmMain comboBox.
Update: Since you changed your question here is the updated version to update your products
This is your products form:
private frmMain main;
public frmSettings(frmMain mainForm)
{
main = mainForm;
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
main.AddProduct(textBox1.Text);
}
It will need the mainform in the constructor to pass the data to it.
And the main form:
private frmSettings settings;
private List<string> products = new List<string>();
public frmMain()
{
InitializeComponent();
//load products from somewhere
}
private void button1_Click(object sender, EventArgs e)
{
if (settings == null)
{
settings = new frmSettings(this);
}
settings.Show();
}
private void UpdateForm()
{
comboBoxProducts.Items.Clear();
comboBoxProducts.Items.AddRange(products.ToArray());
//Other updates
}
public void AddProduct(string product)
{
products.Add(product);
UpdateForm();
}
You then can call UpdateForm() from everywhere on you form, another button for example.
This example uses just a local variable to store your products. There are also missing certain checks for adding a product, but I guess you get the idea...
this.Close();
frmMain main = new frmMain();
main.Show();
There is no such built in method to set all your values as you desire. As i mentioned in the comment that you should create a method with your required settings of all controls, here is the sample code:
private void ReloadForm()
{
comboBox.ResetText();
dataGridView.Update();
//and how many controls or settings you want, just add them here
}
private void button1_Click(object sender, EventArgs e)
{
ReloadForm(); //and call that method on your button click
}
Try out this code.
this.Refresh();
Application.Doevents();
this.Refresh();
Refresh();
this.Hide();
frmScholars ss = new frmScholars();
ss.Show();
you want to Invalidate the form
http://msdn.microsoft.com/en-us/library/598t492a.aspx
IF you are looking to refresh page from usercontrol .Here is expample where i amrefreshing form from usercontrol
Find the form in which this reload button is.
Then Call invalidiate tab control and refresh it.
Dim myForm As Form = btnAuthorise.FindForm()
For Each c As Control In myForm.Controls
If c.Name = "tabControlName" Then
DirectCast(c, System.Windows.Forms.TabControl).Invalidate()
DirectCast(c, System.Windows.Forms.TabControl).Refresh() 'force the call to the drawitem event
End If
Next
Not required reload for entire form. Just create a function for form initialise.
you can call this function any time. This will refresh the form.
private void acc_Load(object sender, EventArgs e)
{
form_Load();
}
public void form_Load()
{
// write form initialise codes example listView1.Clear();...
}
private void button1_Click(object sender, EventArgs e) //edit account
{
//Do something then refresh form
form_Load();
}
If you want to automatically update the value of the other form when you click the button from another one you can use timer control. Just set the timer to 0.5s in order to update the form fast
I think that, by calling the frmMain_load(sender,e) when you are clicking the button should reload the form.
You may also try to Invalidate() the form just like #Nahum said.
I have a button click event handler with the following pseudo code:
private void btnSave_Click(object sender, EventArgs e)
{
if(txt.Text.length == 0)
this.Close();
else
// Do something else
// Some other code...
}
This is just some simple code, but the point is, when the text length equals zero, I want to close the form. But instead of closing the form the code executes the part // Some other code. After the click event handler is completely executed, then the form is closed.
I know, when I place return right after this.Close() the form will close, but I'd like to know WHY the form isn't direclty closed when you call this.Close(). Why is the rest of the event handler executed?
The rest of the event handler is executed because you did not leave the method. It is as simple as that.
Calling this.Close() does not immediately "delete" the form (and the current event handler). The form will be collected later on by the garbage collector if there are no more references to the form.
this.Close() is nothing than a regular method call, and unless the method throws an exception you will stay in the context of your current method.
Close only hides the form; the form is still alive and won't receive another Load event if you show it again.
To actually delete it from memory, use Dispose().
Answer is simple as you are executing your current method so this.Close() will be enqueued until either you explicitly returned or your current excuting method throws an exception.
Another possible solution is that if you open a new Form and want to close the current one: if you use newForm.ShowDialog() instead of newForm.Show() it doesn't close the currentForm with currentForm.Close() until the newForm is also closed.
Unless the Form is a modal form(opened with .ShowDialog()), Form.Close() disposes the form, as well. So, you cannot reopen it under any circumstances after that, despite of what others may have said. There is Form.Visible for this behavior(hiding/showing the form).
The point here is that .Close() does not return from the section it is called for several reasons. For example, you may call SomeForm.Close() from another form or a class or whatever.
Close() is just a method like any other. You have to explicitly return from a method that calls Close() if this is what you want.
Calling MessageBox.Show(frmMain,"a message","a title") adds the form "TextDialog" to the application's Application.OpenForms() forms collection, along-side the frmMain Main form itself. It remains after you close the Messagebox.
When this happens and you call the OK button delegate to close the main form, calling frmMain.Close() will not work, the main form will not disappear and the program will not terminate as it usually will after you exit the OK delegate. Only Application.Exit() will close all of the garbage messagebox "TextDialog"s.
private void btnCloseForm_Click(object sender, EventArgs e)
{
FirstFrm.ActiveForm.Close();
}
and if you want close first form and open secound form do this :
private void btnCloseForm_Click(object sender, EventArgs e)
{
FirstFrm.ActiveForm.Close();
}
private void FirstFrm_FormClosed(object sender, FormClosedEventArgs e)
{
SecounfFrm frm = new SecounfFrm ();
frm.ShowDialog();
}
or you can do somting like that :
private void btnCloseForm_Click(object sender, EventArgs e)
{
this.Hide();
}
private void FirstFrm_VisibleChanged(object sender, EventArgs e)
{
if(this.Visible == false)
{
this.Close();
}
}
private void FirstFrm_FormClosed(object sender, FormClosedEventArgs e)
{
SecounfFrm frm = new SecounfFrm ();
frm.ShowDialog();
}