Windows Dev Center

Convert.ToSingle Method (String)

Converts the specified String representation of a number to an equivalent single-precision floating point number.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

public static float ToSingle(
	string value
)

Parameters

value
Type: System.String
A String containing a number to convert.

Return Value

Type: System.Single
A single-precision floating point number equivalent to the value of value.
-or-
Zero if value is null.

ExceptionCondition
FormatException

value is not a number in a valid format.

OverflowException

value represents a number less than MinValue or greater than MaxValue.

The return value is the result of invoking the Single.Parse method on value.

If you prefer not to handle an exception if the conversion fails, you can call the Single.TryParse method instead. It returns a Boolean value that indicates whether the conversion succeeded or failed.

The following code sample illustrates the conversion of a String to Single, using ToSingle:


public void ConvertStringFloat(string stringVal)
{
   float floatVal = 0;

   try
   {
      floatVal = System.Convert.ToSingle(stringVal);
      outputBlock.Text += String.Format(
         "The string as a float is {0}.", floatVal) + "\n";
   }
   catch (System.OverflowException)
   {
      outputBlock.Text += String.Format(
         "The conversion from string-to-float overflowed.") + "\n";
   }
   catch (System.FormatException)
   {
      outputBlock.Text += String.Format(
         "The string is not formatted as a float.") + "\n";
   }
   catch (System.ArgumentNullException)
   {
      outputBlock.Text += String.Format(
         "The string is null.") + "\n";
   }

   // Float to string conversion will not overflow.
   stringVal = System.Convert.ToString(floatVal);
   outputBlock.Text += String.Format(
      "The float as a string is {0}.", stringVal) + "\n";
}


Windows Phone OS

Supported in: 8.1, 8.0, 7.1, 7.0

Windows Phone

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