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FontNamesConverter.CanConvertFrom Method

Determines whether this converter can convert an object of the specified data type to an array of strings containing individual font names.

Overload List

Determines whether this converter can convert an object of the specified data type to an array of strings containing individual font names.

[Visual Basic] Overloads Overrides Public Function CanConvertFrom(ITypeDescriptorContext, Type) As Boolean
[C#] public override bool CanConvertFrom(ITypeDescriptorContext, Type);
[C++] public: bool CanConvertFrom(ITypeDescriptorContext*, Type*);
[JScript] public override function CanConvertFrom(ITypeDescriptorContext, Type) : Boolean;

Inherited from TypeConverter.

[Visual Basic] Overloads Public Function CanConvertFrom(Type) As Boolean
[C#] public bool CanConvertFrom(Type);
[C++] public: bool CanConvertFrom(Type*);
[JScript] public function CanConvertFrom(Type) : Boolean;

Example

[Visual Basic, C#] The following example demonstrates how to use the CanConvertFrom method to determine whether the specified data type can be converted to an array of strings that contains the individual font names before performing the conversion.

[Visual Basic, C#] Note   This example shows how to use one of the overloaded versions of CanConvertFrom. For other examples that might be available, see the individual overload topics.
[Visual Basic] 
<%@ Page Language="VB" AutoEventWireup="True" %>

<html>
<head>

   <script language="VB" runat="server">
    Sub Page_Load(sender As Object, e As EventArgs)
        
        ' Declare local variables.
        Dim culture As New System.Globalization.CultureInfo("en")
        Dim context As System.ComponentModel.ITypeDescriptorContext = Nothing
        Dim names As Object
        Dim name_string As Object
        
        ' Create FontNamesConverter object.
        Dim fontconverter As New FontNamesConverter()
        
        ' Create original list of fonts.
        Dim font_list As String = "arial, times new roman, verdana"
        
        ' Check for type compatibility.
        If fontconverter.CanConvertFrom(context, GetType(String)) Then
            
            ' Display original string.
            Label1.Text = "Original String :" & "<br><br>" & font_list
            
            ' Convert string to array to strings and display results.
            names = fontconverter.ConvertFrom(context, culture, font_list)
            Label2.Text = "Converted to Array of Strings : " & "<br><br>"
            Dim name_element As String
            For Each name_element In CType(names, String())
                Label2.Text &= name_element & "<br>"
            Next name_element
            
            ' Convert array of strings back to a string and display results.
            name_string = fontconverter.ConvertTo(context, culture, names, _
                GetType(String))
            Label3.Text = "Converted back to String :" & "<br><br>" & _
                CType(name_string, String)
        End If 
    End Sub 'Page_Load
  </script>

</head>
<body>

   <h3>FontNamesConverter Example</h3>
   <p>

   <form runat=server>
        
      <asp:Label id="Label1" runat="server"/>
      <br><hr>
      <asp:Label id="Label2" runat="server"/>
      <br><hr>
      <asp:Label id="Label3" runat="server"/>
        
   </form>

</body>
</html>
   

[C#] 
<%@ Page Language="C#" AutoEventWireup="True" %>

<html>
<head>

   <script language="C#" runat="server">

      void Page_Load(Object sender, EventArgs e) 
      {

         // Declare local variables.
         System.Globalization.CultureInfo culture = new System.Globalization.CultureInfo("en");
         System.ComponentModel.ITypeDescriptorContext context = null;
         Object names; 
         Object name_string;

         // Create FontNamesConverter object.
         FontNamesConverter fontconverter = new FontNamesConverter();

         // Create original list of fonts.
         string font_list = "arial, times new roman, verdana";

         // Check for type compatibility.
         if (fontconverter.CanConvertFrom(context, typeof(string)))
         {

            // Display original string.
            Label1.Text = "Original String :" + "<br><br>" + font_list;

            // Convert string to array to strings and display results.
            names = fontconverter.ConvertFrom(context, culture, font_list);
            Label2.Text = "Converted to Array of Strings : " + "<br><br>";
            foreach (string name_element in (string[])names)
            {
               Label2.Text += name_element + "<br>";
            }

            // Convert array of strings back to a string and display results.
            name_string = fontconverter.ConvertTo(context, culture, names, typeof(string)); 
            Label3.Text = "Converted back to String :" + "<br><br>" + (string)name_string;

         }
          
      }

   </script>

</head>
<body>

   <h3>FontNamesConverter Example</h3>
   <p>

   <form runat=server>
        
      <asp:Label id="Label1" runat="server"/>
      <br><hr>
      <asp:Label id="Label2" runat="server"/>
      <br><hr>
      <asp:Label id="Label3" runat="server"/>
        
   </form>

</body>
</html>
   

[C++, JScript] No example is available for C++ or JScript. To view a Visual Basic or C# example, click the Language Filter button Language Filter in the upper-left corner of the page.

See Also

FontNamesConverter Class | FontNamesConverter Members | System.Web.UI.WebControls Namespace

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