Variable in the JavaScript in C#

Question

ClientScript.RegisterStartupScript(
    Page.GetType(),
    "INFORMATION",
    @"PopupMessage(""INFORMATION"", ""Data was created successfully"", false);",
    true);

The code above show the JavaScript code in C# code behind

What I want to do is add the variable to the message

but I used this code which does not work:

ClientScript.RegisterStartupScript(
    Page.GetType(),
    "INFORMATION",
    @"PopupMessage(""INFORMATION"", """+Data+" was created successfully"", false);",
    true);

It throws error:

Error CS1501 No overload for method 'RegisterStartupScript' takes 5 arguments

Does someone know how to make it work?

The Data is a String type data after add "+Data+" the code fail to run . It show CS1003: Syntax Error, ',' expected — Haroro
– Haroro, Commented Aug 16, 2021 at 14:43
Severity Code Description Project File Line Suppression State Error CS1501 No overload for method 'RegisterStartupScript' takes 5 arguments Severity Code Description Project File Line Suppression State Error CS1003 Syntax error, ',' expected — Haroro
– Haroro, Commented Aug 16, 2021 at 14:45
That @ only applies to the string literal immediately following it, not to any other literals in the same expression - see David's answer — Hans Keﬆing
– Hans Keﬆing, Commented Aug 16, 2021 at 14:51

David · Accepted Answer · 2021-08-16 14:43:59Z

3

This string literal is a syntax error:

" was created successfully"", false);"

One of the things the verbatim identifier does for a string is change the way double-quotes are interpreted. Without it, double-quotes need to be escaped. But with it, escaping doesn't work (because it's a verbatim string) so a special consideration needs to be made for double-quotes. To add them to a string you need to "double" them.

This is why your other string literal works as expected:

@"PopupMessage(""INFORMATION"", """

To achieve the same thing in the failing string literal, use the verbatim identifier again:

@" was created successfully"", false);"

answered Aug 16, 2021 at 14:43

David

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2 Comments

Haroro Over a year ago

OMG! It's Works!! Thank You David ~~ Thank you so much~

Developer Over a year ago

You can mark it as answer if it works for you

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