I am trying to figure out how to make it that when my timer ticks, it performs a bidder00_TextChanged, or something like that.
Is this even possible to do? and if it isn't, is there any other way to do it?
I tried to search Google for it but i didn't get any results, if you find anything that i missed please post it here.
I don't really have any code but here it is:
private void bidder00_TextChanged(object sender, EventArgs e)
{
if (bidder00.Text == addbidder1.Text)
{
bidBtn1.PerformClick();
}
}
That is my TextChanged Event
My timer doesn't have any code because it is going to perform the bidder00_TextChanged Event.
You could create a method Perform() and call it from within your event handlers :
private void timer1_Tick(object sender, EventArgs e)
{
Perform();
}
private void bidder00_TextChanged(object sender, EventArgs e)
{
Perform();
}
private void Perform()
{
if (bidder00.Text == addbidder1.Text)
{
bidBtn1.PerformClick();
}
}
I assume you have coupled your actual logic with your click event which is not a good idea. Separate the code out into a separate function and have both parts of the application call the same code e.g.
private void SubmitBid()
{
// code you want to execute
}
private void OnSubmitBid()
{
// confirm whether we can actually submit the bid
if (bidder00.Text == addbidder1.Text)
{
SubmitBid();
}
}
private void Timer1_OnTick(object sender, EventArgs e)
{
// trigger code from timer
OnSubmitBid();
}
private void bidder00_TextChanged(object sender, EventArgs e)
{
// trigger code from text change
OnSubmitBid();
}
private void btnBid_Click(object sender, EventArgs e)
{
// trigger code from button press
OnSubmitBid();
}
Notice all the UI controls trigger the same code. There is an extra call in there for the text control validation (i.e. OnSubmitBid()) - if this wasn't required then you would just call SubmitBid directly.
Related
I know how to programmatically invoke the event handler of a Button:
button1.PerformClick();
I would like to do the same for the Click event handler of a TextBox. The problem is that TextBox does not have a
textBox1.PerformClick();
I suggest method extraction (why should we mix UI - windows messages and Business Logic):
//TODO: put a better name here
private void onMyTextBoxClick() {
//TODO: relevant code here
}
private void MyTextBox_Click(object sender, EventArgs e) {
onMyTextBoxClick();
}
Then you can just call onMyTextBoxClick:
...
// Same business logic as if MyTextBox is clicked
onMyTextBoxClick();
...
Edit: If you really want EventArgs aruments, just provide them:
//TODO: put a better name here
private void onMyTextBoxClick(TextBox box, EventArgs e) {
//TODO: relevant code here
}
// Default EventArgs
private void onMyTextBoxClick(TextBox box) {
onMyTextBoxClick(box, EventArgs.Empty);
}
// Both TextBox and EventArgs are default ones
private void onMyTextBoxClick() {
onMyTextBoxClick(MyTextBox, EventArgs.Empty);
}
private void MyTextBox_Click(object sender, EventArgs e) {
onMyTextBoxClick(sender as TextBox, e);
}
Usage:
// Default EventArgs
onMyTextBoxClick(myTextBox);
// Custom EventArgs
EventArgs args = ...
onMyTextBoxClick(myTextBox, args);
In my C# form I have two buttons
button1.Hide()
private void button2_Click(object sender, EventArgs e)
{
button1.PerformClick();
}
The button1 is hidden at form loading, I want the logic behind button1 to be perfomed when it's hidden too.
Just let the function outside become another function, then you can call function although you hidden the button1.
private void button1(object sender, EventArgs e)
{
_button1();
}
private void button2(object sender, EventArgs e)
{
_button1();
}
//Here is the function
void _button1()
{
...
}
If your Button is hidden, it seems that you need the functionality behind not or just in special cases. Keeping functionality out of events is often a simple solution to avoid problems in the future.
private void btn_Reload_Click(object sender, EventArgs e)
{
// reload here - maybe you reload all your employees from a datasource
}
private void btn_Reload_With_Calculation_Click(object sender, EventArgs e)
{
// you can use functionality here from a another button and call the
btn_Reload_Click(this, EventArgs.Empty); // DON'T DO THIS IN MY OPINION
// ....
}
Maybe this solution is better even if you need the functionality at other workflows.
private void btn_Reload_Click(object sender, EventArgs e)
{
Reload();
}
private void btn_Reload_With_Calculation_Click(object sender, EventArgs e)
{
Reload();
Calculate();
}
void Reload() { }
void Calculate() { }
Lets assume I have this code
private void Exitbtn_Click(object sender, EventArgs e)
{
Application.Exit();
}
And I want to call this function from another part of my code and not only from the click of the user
code...
{
...do something...
Exitbtn_Click()
}
I have tried Exitbtn.Click +=new EventHandler(Exitbtn_Click); but it doesn't work i believe it is because of the word new but I am not sure, I am new to C#
Whilst you could call:
Exitbtn_Click(null, EventArgs.Empty);
If you actually need sender / EventArgs to be populated it could become messy.
Personally it seems cleaner to wrap the common logic in a private method and call from both places.
private void ApplicationExit()
{
Application.Exit();
}
private void Exitbtn_Click(object sender, EventArgs e)
{
ApplicationExit();
}
code...
{
...do something...
ApplicationExit();
}
As john said in the comments:
Exitbtn_Click(null, EventArgs.Empty);
I am trying to call a OnCellEditEnding event from another event,
private void BillsTableRecords_OnCellEditEnding(object sender, DataGridCellEditEndingEventArgs e)
{
// do stuff here
}
My issue is I don't know how to pass the DataGridCellEditEndingEventArgs into the method, i.e. the e in the below method obviously gives an error as it is referencing RoutedEventArgs not DataGridCellEditEndingEventArgs.
private void BillsRecordsCheckBox_OnChecked(object sender, RoutedEventArgs e)
{
BillsTableRecords_OnCellEditEnding(sender, e);
}
So how do obtain the value from DataGridCellEditEndingEventArgs so that I can pass the value in the method? Please note that the DataGrid cell with be selected at this point so it will contain a value.
I wouldn't recommend this approach. Event handlers are to be called by events; their signature does not really fit for a standalone call. In case you execute business code in your event handler, it is also not good design, because your event handlers are UI code, which should be separated from business code.
The best way to go here is to create a dedicated method that does what you want and call it from both event handlers:
private void DoStuff(/* add the parameters you need*/) {
//do stuff
}
private void BillsTableRecords_OnCellEditEnding(object sender, DataGridCellEditEndingEventArgs e)
{
DoStuff();
}
private void BillsRecordsCheckBox_OnChecked(object sender, RoutedEventArgs e)
{
DoStuff();
}
try that
private void BillsRecordsCheckBox_OnChecked(object sender, RoutedEventArgs e)
{
BillsTableRecords_OnCellEditEnding(sender, new DataGridCellEditEndingEventArg());
}
If you want to keep the arguments from the RoutedEventArgs, add them to the constructor of DataGridCellEditEndingEventArg
I've got these Methods:
private void button_Click(object sender, EventArgs e)
{
//Changes the Text in the RichBox, EXAMPLE:
richtTextBox.Text = "Now Changed and calling Method richTextBox_TextChanged";
}
And,
private void richTextBox_TextChanged(object sender, EventArgs e)
{
//Wants something like that
if(called from button_click)
{
//DO SOMETHING
}
else
{
//DO SOMETHING
}
}
How can I handle this, to know if it was called from the Button_click?
Do I have to use the object sender to get informations? But how?
Hope u guys can help me
Just use a flag:
private bool _isInButtonClick;
private void button_Click(object sender, EventArgs e)
{
try
{
_isInButtonClick = true;
//Changes the Text in the RichBox, EXAMPLE:
richtTextBox.Text = "Now Changed and calling Method richTextBox_TextChanged";
}
finally
{
_isInButtonClick = false;
}
}
private void richTextBox_TextChanged(object sender, EventArgs e)
{
if(_isInButtonClick)
{
//DO SOMETHING
}
else
{
//DO SOMETHING
}
}
private void richTextBox_TextChanged(object sender, EventArgs e)
Here sender is the richTextBox, not the button that changed the text.
You could go into the stack trace to discover if the button click is on the call stack, but that's overkill (like using a nuke to crack a walnut).
Add a flag (bool) to your form, set it to true in the button click, and check it in the TextChanged event, then at the end of the button click, set it to false again.
If you do this I would advise wrapping this signal logic in a class that implements IDispose and use it in using statements.
That said, are you sure you need this functionality?