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Convert.ToSingle Method (String)

Silverlight

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.

Exceptions

Exception	Condition
FormatException	value is not a number in a valid format.
OverflowException	value represents a number less than MinValue or greater than MaxValue.

Remarks

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.

Examples

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";
}