项目
11/18/2011

Convert.ToString Method (Single)

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Converts the value of the specified single-precision floating point number to its equivalent String representation.

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

Syntax

'Declaration
Public Shared Function ToString ( _
    value As Single _
) As String

public static string ToString(
    float value
)

Parameters

value
Type: System.Single
A single-precision floating point number.

Return Value

Type: System.String
The String equivalent of the value of value.

Remarks

This implementation is identical to Single.ToString.

Examples

The following code sample illustrates the conversion of a Single to a String, using ToString.

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

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";
}

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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