ReSharper reorder String.Format() arguments

Question

I often find myself writing something daft like:

String.Format("{1}: {0}", reason, message);

or something similar but with far more string placeholders.

Is there an automated refactoring in ReSharper to change the order of the placeholders and the arguments? I have a tendency to mess up the mapping if I try to change the order by hand.

Obviously, the example above is trivial. What I am doing in reality is often writing something like:

String.Format("{0}.{2} = {1}.{3} AND {0}.{4} = {1}.{5} AND {6}.{7} = {1}.{8}",
  table1Alias, table2Alias, col1A, col2A, col1B, col2B, table3Alias, col3C, col2C);

and thinking to myself that it would be great if I could move table3Alias up to the front next to the other aliases.

(ReSharper 7.1.3)

Pang · Accepted Answer · 2021-07-14 09:56:29Z

4

For C# 6+ (ReSharper 10+ / 2016+):

Place your cursor at string.Format
Press Alt + Enter
Select Use string interpolation
Press Alt + Enter again
Select Convert to string.Format

edited Jul 14, 2021 at 9:56

Pang

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answered May 20, 2016 at 10:39

Chris Xue

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1 Comment

Wolfsblvt Over a year ago

That's a sneaky way of doing it. But if I use C# 6, why would I even want string.Format anymore?

Daniel Hilgarth · Accepted Answer · 2013-09-19 13:43:19Z

1

No, there is no such functionality.

answered Sep 19, 2013 at 13:43

Daniel Hilgarth

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Comments

Pang · Accepted Answer · 2021-07-14 09:57:13Z

1

Just place your cursor in table3Alias, then press Ctrl + Alt + Shift + Left/Right arrow. This changes the parameter order in a function call.

There's also an option for removing one when you press Ctrl + Shift + R

enter image description here

There's also a shortcut to add a format item. You may be able to do what you want with combining these. The exact functionality you ask is not implemented.

edited Jul 14, 2021 at 9:57

Pang

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answered Sep 19, 2013 at 13:43

Ufuk Hacıoğulları

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6 Comments

Daniel Hilgarth Over a year ago

That doesn't change the corresponding placeholder(s) in the string.

Ufuk Hacıoğulları Over a year ago

Nope, that changes the order of parameters. Isn't that what OP wants?

NDJ Over a year ago

+1 for being a cool trick anyway, don't know how I didn't know about that

Jonny Over a year ago

I wanted to change the order of the parameters and have the place holders keep in sync.

Daniel Hilgarth Over a year ago

string.Format("{0}, {1}, {2}", foo, bar, fubar). Put the cursor on fubar and hit Ctrl + Alt + Shift + Left. The result is: string.Format("{0}, {1}, {2}", foo, fubar, bar). But the OP wants this: string.Format("{0}, {2}, {1}", foo, fubar, bar)

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