Convert.ToSingle Method (String)
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Converts the specified String representation of a number to an equivalent single-precision floating point number.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- value
- Type: System.String
A String containing a number to convert.
Return Value
Type: System.SingleA single-precision floating point number equivalent to the value of value.
-or-
Zero if value is Nothing.
| Exception | Condition |
|---|---|
| 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 Sub ConvertStringFloat(ByVal stringVal As String) Dim singleVal As Single = 0 Try singleVal = System.Convert.ToSingle(singleVal) outputBlock.Text &= String.Format("The string as a single is {0}.", _ singleVal) & vbCrLf Catch exception As System.OverflowException outputBlock.Text &= String.Format( _ "Overflow in string-to-single conversion.") & vbCrLf Catch exception As System.FormatException outputBlock.Text &= String.Format( _ "The string is not formatted as a Single.") & vbCrLf Catch exception As System.ArgumentException outputBlock.Text &= "The string is null." & vbCrLf End Try ' Single to string conversion will not overflow. stringVal = System.Convert.ToString(singleVal) outputBlock.Text &= String.Format("The single as a string is {0}.", _ stringVal) & vbCrLf End Sub