How to display message using ternary operator

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hello
i want to perform some validation operation. here using if statement i am done my validation but i wanted to ask can we use ternary operator for displaying message.

What I have tried:

Suppose i want to restrict if name textbox is null. and here using if condition i am doing well like this .

else if (txtName.Text == "")
          {
              MessageBox.Show("Please enter the name");
              return;
          }

i want using ternary

bool chechvalidation = txtUName.Text != "" ? true : false  MessageBox.Show("Please enter name")return;

Posted 26-May-17 0:39am

AZHAR SAYYAD

Updated 26-May-17 0:45am

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F-ES Sitecore · Answer 1 · 2017-05-26T00:44:00

You can't use a ternary for that. Ternary operations are to decide the output from two options.

string a = <some condition> ? x : y

So "x" and "y" both have to conform to the desired target, ie they have to be "string" as you're ultimately doing either this

string a = x

or this

string a = y

Wanting to put code there like a message box means doing this

string a = "Hello" MessageBox.Show

Obviously that's not valid.

OriginalGriff · Answer 2 · 2017-05-26T00:45:00

No, not directly.
You could do it:

C#

private bool DoSometheingFairlyPointless(string s)
   {
   MessageBox.Show(s);
   return false;
   }
...
bool chechvalidation = txtUName.Text != "" ? true : DoSometheingFairlyPointless("Please enter name");

But even then, you can't exit the calling method within the operator.

Even if you could, it wouldn't be particularly readable and I'd suggest you avoid it.

How to display message using ternary operator

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