Question

I made a query to SQL Server to get some data via a Stored Procedure, the returned value was this:

10219150

Then, in an assembly (I don’t have the source code of that assembly, I reflected the file to view the code) someone had written this:

Amount = Convert.ToSingle(10219150); //the value from the stored procedure

So, when I invoke that method which does the final conversion, it returns this value:

1.021315E+7

How is that possible? Why does the Convert.ToSingle add extra decimal positions? I don’t understand.

Is there a way that i can reverse that conversion on my code when I invoke that method of the assembly? I can’t rewrite that assembly file as it’s too big, and, as I mentioned earlier, I don’t have the source code to fix the conversion.

From this: 1.021315E+7 To this: 10219150 again (restore the correct value without that conversion)

Hope I made myself clear.

Thanks in advance.

Answer 1

The conversion to single isn’t adding extra precision.

10219150 is 1.021315E+7 (which is just another way of writing 1.021315 * 10⁷).

The method you are using to print out the value is just using scientific notation to display the number.

If you are printing the number then you need to set the formatting options.

    float amount = Convert.ToSingle("10219150");
    string toPrint = string.Format("{0:N}", amount);

Will print the number as:

"10,219,150.00"

To get no decimal places use "{0:N0}" as the format string.