INameCreationService.IsValidName(String) Method

Reference

Definition

Namespace:: System.ComponentModel.Design.Serialization

Assemblies:: netstandard.dll, System.ComponentModel.TypeConverter.dll

Assembly:: System.ComponentModel.TypeConverter.dll

Assembly:: System.dll

Assembly:: netstandard.dll

Important

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Gets a value indicating whether the specified name is valid.

public:
 bool IsValidName(System::String ^ name);

public bool IsValidName(string name);

abstract member IsValidName : string -> bool

Public Function IsValidName (name As String) As Boolean

Parameters

name: String

The name to validate.

Returns

Boolean

true if the name is valid; otherwise, false.

Examples

The following code example provides an example INameCreationService.IsValidName method implementation. The method uses a string validation scheme that examines each character of the specified string to determine whether the specified string is a valid name. The method returns true if the string is valid, or false otherwise.

// Returns whether the specified name contains 
// all valid character types.
virtual bool IsValidName( String^ name )
{
   for ( int i = 0; i < name->Length; i++ )
   {
      Char ch = name[ i ];
      UnicodeCategory uc = Char::GetUnicodeCategory( ch );
      switch ( uc )
      {
         case UnicodeCategory::UppercaseLetter:
         case UnicodeCategory::LowercaseLetter:
         case UnicodeCategory::TitlecaseLetter:
         case UnicodeCategory::DecimalDigitNumber:
            break;

         default:
            return false;
      }
   }
   return true;
}

// Returns whether the specified name contains 
// all valid character types.
public bool IsValidName(string name)
{            
    for(int i = 0; i < name.Length; i++)
    {
        char ch = name[i];
        UnicodeCategory uc = Char.GetUnicodeCategory(ch);
        switch (uc) 
        {
            case UnicodeCategory.UppercaseLetter:       
            case UnicodeCategory.LowercaseLetter:     
            case UnicodeCategory.TitlecaseLetter:                                                  
            case UnicodeCategory.DecimalDigitNumber:                         
                break;
            default:
                return false;                
        }
    }
    return true;        
 }

' Returns whether the specified name contains 
' all valid character types.
Public Function IsValidName(ByVal name As String) As Boolean Implements INameCreationService.IsValidName
    Dim i As Integer
    For i = 0 To name.Length - 1
        Dim ch As Char = name.Chars(i)
        Dim uc As UnicodeCategory = [Char].GetUnicodeCategory(ch)
        Select Case uc
            Case UnicodeCategory.UppercaseLetter, UnicodeCategory.LowercaseLetter, UnicodeCategory.TitlecaseLetter, UnicodeCategory.DecimalDigitNumber
            Case Else
                Return False
        End Select
    Next i
    Return True
End Function

Remarks

An implementation of the INameCreationService can have rules that define the parameters for valid names. This method can be implemented to validate a name and enforce those rules.

Applies to

Tuote	Versiot
.NET	Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	2.0, 2.1

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