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no overload for method "ToString" takes 1 arguments

Tags:

c#

sql

asp.net

I have a data reader to read the datas from database. I am reading TotalPrice from sales table. I would like to show the total price as 2 decimal place.

The code is something link that:

TotalPrice.Text = myReader["TotalPrice"].ToString("N2");

However i encounted this error: no overload for method "ToString" takes 1 arguments What's wrong with the code?

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user1125911 Avatar asked Feb 01 '12 05:02

user1125911


2 Answers

String.Format() will do the trick. F2 is fixed-point notation with 2 decimal places.

TotalPrice.Text = string.Format("{0:F2}", (double)myReader["TotalPrice"]);
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Despertar Avatar answered Sep 29 '22 00:09

Despertar


Assuming that TotalPrice is a Decimal column, and that myReader is a DataReader:

TotalPrice.Text = myReader.GetDecimal(myReader.GetOrdinal("TotalPrice")).ToString("N2");

The idea here is that myReader's indexer (what you are using when you call myReader["TotalPrice"]) returns an Object. It has to, since it doesn't know at compile time what type the column is. By using .GetDecimal(), you are assuring that you get a Decimal value back, or an error.

The .ToString overload that takes a format string is declared on Decimal, not on Object. Object's .ToString takes no arguments.

The inner call to GetOrdinal returns the field's index given the name- if you are doing this in a loop for multiple data rows, you'd probably want to cache that in a variable.

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Chris Shain Avatar answered Sep 29 '22 00:09

Chris Shain