public void ValidateUsageWithContainerType_ContainerTypeWithOnePropertyWithArgumentsAttribute_ValidatesOK()
{
Type containerType = typeof(ContainerWithOneArgumentsAttributeProperty);
var attr = new ArgumentsAttribute();
attr.ValidateUsage(containerType);
}
public void ValidateUsageWithContainerType_ContainerTypeWithTwoPropertiesWithArgumentsAttribute_ThrowsInvalidOperationException()
{
Type containerType = typeof(ContainerWithTwoArgumentsAttributeProperties);
var attr = new ArgumentsAttribute();
Assert.Throws <InvalidOperationException>(() => attr.ValidateUsage(containerType));
}
public void ValidateUsageWithPropertyInfo_PropertyWithoutArgumentsAttribute_ThrowsInvalidOperationException()
{
PropertyInfo property = typeof(ContainerWithPropertyWithoutArgumentsAttribute).GetProperty("Arguments1");
var attr = new ArgumentsAttribute();
Assert.Throws <InvalidOperationException>(() => attr.ValidateUsage(property));
}
public void ValidateUsageWithPropertyInfo_PropertyWithArgumentsAttributeOnStringCollectionProperty_ValidatesOK()
{
PropertyInfo property = typeof(ContainerWithStringCollectionArgumentsProperty).GetProperty("Arguments");
var attr = new ArgumentsAttribute();
attr.ValidateUsage(property);
}
public void ValidateUsageWithPropertyInfo_PropertyWithArgumentsAttributeButNotACollection_ThrowsInvalidOperationException()
{
PropertyInfo property = typeof(ContainerWithNonCollectionArgumentsProperty).GetProperty("Arguments");
var attr = new ArgumentsAttribute();
Assert.Throws <InvalidOperationException>(() => attr.ValidateUsage(property));
}
///////////////////////////////////////////////////////////////////////
#region MemberInfo (Mostly Type) Attribute Methods
public static int GetArguments(
MemberInfo memberInfo
)
{
if (memberInfo != null)
{
try
{
if (memberInfo.IsDefined(
typeof(ArgumentsAttribute), false))
{
ArgumentsAttribute arguments =
(ArgumentsAttribute)
memberInfo.GetCustomAttributes(
typeof(ArgumentsAttribute), false)[0];
return(arguments.Arguments);
}
}
catch
{
// do nothing.
}
}
return((int)Arity.None);
}
/// <summary>Edits the specified object's value using the editor style indicated by the <see cref="M:System.Drawing.Design.UITypeEditor.GetEditStyle"/> method.</summary>
/// <param name="context">An <see cref="T:System.ComponentModel.ITypeDescriptorContext"/> that can be used to gain additional context information. </param>
/// <param name="provider">An <see cref="T:System.IServiceProvider"/> that this editor can use to obtain services. </param>
/// <param name="value">The object to edit. </param>
/// <returns>The new value of the object. If the value of the object has not changed, this should return the same object it was passed.</returns>
public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
{
if ((context == null) || (provider == null))
{
return(base.EditValue(context, provider, value));
}
IWindowsFormsEditorService editorService = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService));
if (editorService == null)
{
return(base.EditValue(context, provider, value));
}
Location = Convert.ToString(value);
DirectoryInfo = Directory.GetParent(Location);
RootFolder = DefaultRootFolder;
Description = string.Empty;
ShowNewFolderButton = false;
// Validate the custom attributes.
if (context.PropertyDescriptor != null)
{
// Get all the arguments of the specific type to a list.
var argumentsAttributes = context.PropertyDescriptor.Attributes.OfType <ArgumentsAttribute>().ToList();
// Handle when the arguments list contains items.
if (argumentsAttributes.Any())
{
// Get the first argument in the list index.
ArgumentsAttribute argumentsAttribute = argumentsAttributes.First();
// Initialize new values
Location = argumentsAttribute.Location;
DirectoryInfo = Directory.GetParent(Location);
RootFolder = argumentsAttribute.RootFolder;
// Pass variables to properties
Description = argumentsAttribute.Description;
ShowNewFolderButton = argumentsAttribute.ShowNewFolderButton;
}
}
// Open the specified directory / folder browser dialog.
Location = OpenFolderBrowserDialog();
// Validate the file path.
if (!string.IsNullOrEmpty(Location))
{
return(Location);
}
else
{
return(base.EditValue(context, provider, value));
}
}
