public void ReadOnly()
{
TextInfo enus = new CultureInfo("en-US").TextInfo;
Assert.IsFalse(enus.IsReadOnly, "IsReadOnly-1");
TextInfo ro = TextInfo.ReadOnly(enus);
Assert.IsTrue(ro.IsReadOnly, "IsReadOnly-2");
CompareProperties(enus, ro, false);
}
public void Clone_ReadOnly()
{
TextInfo enus = TextInfo.ReadOnly(new CultureInfo("en-US").TextInfo);
Assert.IsTrue(enus.IsReadOnly, "IsReadOnly-1");
TextInfo clone = (TextInfo)enus.Clone();
Assert.IsFalse(clone.IsReadOnly, "IsReadOnly-2");
CompareProperties(enus, clone, false);
// cloned item is *NOT* read-only
}
public void ReadOnlyTest()
{
TextInfo ti = CultureInfo.GetCultureInfo("en-US").TextInfo;
Assert.True(ti.IsReadOnly, "IsReadOnly should be true with cached TextInfo object");
ti = (TextInfo)ti.Clone();
Assert.False(ti.IsReadOnly, "IsReadOnly should be false with cloned TextInfo object");
ti = TextInfo.ReadOnly(ti);
Assert.True(ti.IsReadOnly, "IsReadOnly should be true with created read-nly TextInfo object");
}
public static void Main()
{
// Get the TextInfo of a predefined culture that ships with
// the .NET Framework.
CultureInfo ci = new CultureInfo("en-US");
TextInfo ti1 = ci.TextInfo;
// Display whether the TextInfo is read-only or not.
DisplayReadOnly("1) The original TextInfo object", ti1);
Console.WriteLine();
// Create a clone of the original TextInfo and cast the clone to a TextInfo type.
Console.WriteLine("2a) Create a clone of the original TextInfo object...");
TextInfo ti2 = (TextInfo)ti1.Clone();
// Display whether the clone is read-only.
DisplayReadOnly("2b) The TextInfo clone", ti2);
// Set the ListSeparator property on the TextInfo clone.
Console.WriteLine("2c) The original value of the clone's ListSeparator " +
"property is \"{0}\".", ti2.ListSeparator);
ti2.ListSeparator = "/";
Console.WriteLine("2d) The new value of the clone's ListSeparator " +
"property is \"{0}\".\n", ti2.ListSeparator);
// Create a read-only clone of the original TextInfo.
Console.WriteLine("3a) Create a read-only clone of the original TextInfo object...");
TextInfo ti3 = TextInfo.ReadOnly(ti1);
// Display whether the read-only clone is actually read-only.
DisplayReadOnly("3b) The TextInfo clone", ti3);
// Try to set the ListSeparator property of a read-only TextInfo object. Use the
// IsReadOnly property again to determine whether to attempt the set operation. You
// could use a try-catch block instead and catch an InvalidOperationException when
// the set operation fails, but that programming technique is inefficient.
Console.WriteLine("3c) Try to set the read-only clone's LineSeparator " +
"property.");
if (ti3.IsReadOnly == true)
{
Console.WriteLine("3d) The set operation is invalid.");
}
else
{
// This clause is not executed.
ti3.ListSeparator = "/";
Console.WriteLine("3d) The new value of the clone's ListSeparator " +
"property is \"{0}\".\n", ti2.ListSeparator);
}
}
