How to use Switch Statement with RadioButtons

[Joseph]

I would like to know how to implement several Radiobuttons using the Switch
statement instead of If/Else conditional statement. For instance, if I have
the following:

if (RadioButton1.Checked = true)
{
//Do something;
}
elseif(RadioButton2.Checked = true)
{
//Do something else;
}
elseif(RadioButton3.Checked = true)
{
//Do something special;
}

Thanks

 

[tat]

I would like to know how to implement several Radiobuttons using the Switch
statement instead of If/Else conditional statement. For instance, if I have
the following:

if (RadioButton1.Checked = true)
{
    //Do something;}

elseif(RadioButton2.Checked = true)
{
   //Do something else;}

elseif(RadioButton3.Checked = true)
{
   //Do something special;

}

Thanks

I used to have this question. My solution is rather trivial but it
worked for me. What you should do is to write a common event handler
for
all three button, e.g
// when you declare the buttons you should add
RadionButton1.CheckedChanged += new
EventHandler(radioButton_CheckedChanged);
RadionButton2.CheckedChanged += new
EventHandler(radioButton_CheckedChanged);
RadionButton3.CheckedChanged += new
EventHandler(radioButton_CheckedChanged);

private void radioButton_CheckedChanged(object sender, EventArgs e)
{
if (RadioButton1.Checked)
{
// do something
memberFunction1();
}
else if (RadioButton2.Checked)
{
// do something
memberFunction2();
}
else if (RadioButton3.Checked)
{
// do something
memberFunction3();
}
}

In my case three member function can be written as 1 member function
with three different input parameters.
Tuan

 

[Ken Foskey]

I used to have this question. My solution is rather trivial but it
worked for me. What you should do is to write a common event handler for
all three button, e.g
// when you declare the buttons you should add
RadionButton1.CheckedChanged += new
EventHandler(radioButton_CheckedChanged); RadionButton2.CheckedChanged
+= new
EventHandler(radioButton_CheckedChanged); RadionButton3.CheckedChanged
+= new
EventHandler(radioButton_CheckedChanged);

private void radioButton_CheckedChanged(object sender, EventArgs e) {
if (RadioButton1.Checked)
{
// do something
memberFunction1();
}
else if (RadioButton2.Checked)
{
// do something
memberFunction2();
}
else if (RadioButton3.Checked)
{
// do something
memberFunction3();
}
}

In my case three member function can be written as 1 member function
with three different input parameters. Tuan

Wouldn't the sender be the RadioButton and the switch could work on it
trivially:

switch( sender) { case RadioButton3: ... }


Personally I would go for separate events for each and remove the switch
statement, each to his own.

 

[Jon Skeet [C# MVP]]

Wouldn't the sender be the RadioButton and the switch could work on it
trivially:

switch( sender) {  case RadioButton3: ... }

switch doesn't work with arbitrary types - basically just with strings
and numeric/char types. The cases have to be constants, too.

Personally I would go for separate events for each and remove the switch
statement,  each to his own.

Yes, I'd agree with that.

Jon

 

[TAB]

Wouldn't the sender be the RadioButton and the switch could work on it
trivially:

switch( sender) { case RadioButton3: ... }


Personally I would go for separate events for each and remove the switch
statement, each to his own.

I am using this to enable and disable controls depending on which
radiobutton is pressed.
It's easy to read and maintain, if you name the buttons depending on
function.

private void radioButton_Click(object sender, EventArgs e)
{
RadioButton radioBtn = (RadioButton) sender;

currentButton = radioBtn.Name;

switch (currentButton)
{
case "onceButton":
EnableControls(true, false, false, false);
break;
case "dailyButton":
EnableControls(false, true, false, false);
break;
case "weeklyButton":
EnableControls(false, false, true, false);
break;
case "monthlyButton":
EnableControls(false, false, false, true);
break;
}
}

 

[Joseph]

Thanks everone for replying to my question. I was able to find the solution
based on some of your answers. Here is what I came up with:

private void radioButton_Click(object sender, EventArgs e)
{
RadioButton radioBtn = (RadioButton)sender;

string currentButton = radioBtn.Name;
if (radioBtn.Checked == true)
{
switch (currentButton)
{
case "radioButton1":
MessageBox.Show("You clicked the first button");
break;
case "radioButton2":
MessageBox.Show("You clicked the second button");
break;
case "radioButton3":
MessageBox.Show("You clicked the third button");
break;
}
}
}

Rather simple solution but effective for what I need it for. I normally
develop in ASP.Net and I am somewhat surprised that ASP.Net provides a
buttonlist object that you can make use of it's Items property to enumerate
to the needed radiobutton and in a Winform this feature appears to not be an
option.

 

[Bjørn Brox]

Joseph skrev:

Thanks everone for replying to my question. I was able to find the solution
based on some of your answers. Here is what I came up with:

private void radioButton_Click(object sender, EventArgs e)
{
RadioButton radioBtn = (RadioButton)sender;

string currentButton = radioBtn.Name;
if (radioBtn.Checked == true)
{
switch (currentButton)
{
case "radioButton1":

Personally I very often use the Tag element to make a binding between a
userinterface element an the value it represent.

If your RadioButton represent for example an enum value you store it in
the Tel element and simply extract it in the eventhandler..