Can I change the output data style so that a comma appears when the data is a number?

kunio

Can I change the output data style so that a comma appears when the data is a number? 

JoeAlbahari

You need to add a static ToDump method to your query to intercept the Dump pipeline:

static object ToDump (object input)
{
    if (input is int or long)
        return $"{input:N0}";

    if (input is float or double or decimal)
        return $"{input:#,##0.###################################}";

    return input;
}

If you define this method in the My Extensions query, it will work for all queries.

kunio

cannot function, The Source Object is a dynamic List; 
How to apply the format number to all method dumps?

JoeAlbahari

If you define this method in the My Extensions query, it will work for all queries.

kunio

Before I'm defined in my query; when I move to my extensions, it's now working. 

thankyou so much

Next question

Can apply format for sum total?

JoeAlbahari

Try the latest beta:
https://www.linqpad.net/linqpad7.aspx#beta

There are now options in Edit | Preferences to include group separators in numbers without needing to write a ToDump method. It also applies your preferences to total columns and data grids (both formatting and parsing) and handles all local cultures.