110 lines
4.0 KiB
C#
110 lines
4.0 KiB
C#
//------------------------------------------------------------------------------
|
|
// <copyright file="ArrayConverter.cs" company="Microsoft">
|
|
// Copyright (c) Microsoft Corporation. All rights reserved.
|
|
// </copyright>
|
|
//------------------------------------------------------------------------------
|
|
|
|
/*
|
|
*/
|
|
namespace System.ComponentModel {
|
|
using Microsoft.Win32;
|
|
using System.Collections;
|
|
using System.Diagnostics;
|
|
using System.Globalization;
|
|
using System.Runtime.InteropServices;
|
|
using System.Runtime.Remoting;
|
|
using System.Runtime.Serialization.Formatters;
|
|
using System.Security.Permissions;
|
|
|
|
/// <devdoc>
|
|
/// <para>Provides a type converter to convert <see cref='System.Array'/>
|
|
/// objects to and from various other representations.</para>
|
|
/// </devdoc>
|
|
[HostProtection(SharedState = true)]
|
|
public class ArrayConverter : CollectionConverter
|
|
{
|
|
|
|
/// <devdoc>
|
|
/// <para>Converts the given value object to the specified destination type.</para>
|
|
/// </devdoc>
|
|
public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) {
|
|
if (destinationType == null) {
|
|
throw new ArgumentNullException("destinationType");
|
|
}
|
|
|
|
if (destinationType == typeof(string)) {
|
|
if (value is Array) {
|
|
return SR.GetString(SR.ArrayConverterText, value.GetType().Name);
|
|
}
|
|
}
|
|
|
|
return base.ConvertTo(context, culture, value, destinationType);
|
|
}
|
|
|
|
/// <devdoc>
|
|
/// <para>Gets a collection of properties for the type of array
|
|
/// specified by the value
|
|
/// parameter.</para>
|
|
/// </devdoc>
|
|
public override PropertyDescriptorCollection GetProperties(ITypeDescriptorContext context, object value, Attribute[] attributes) {
|
|
|
|
PropertyDescriptor[] props = null;
|
|
|
|
if (value.GetType().IsArray) {
|
|
Array valueArray = (Array)value;
|
|
int length = valueArray.GetLength(0);
|
|
props = new PropertyDescriptor[length];
|
|
|
|
Type arrayType = value.GetType();
|
|
Type elementType = arrayType.GetElementType();
|
|
|
|
for (int i = 0; i < length; i++) {
|
|
props[i] = new ArrayPropertyDescriptor(arrayType, elementType, i);
|
|
}
|
|
}
|
|
|
|
return new PropertyDescriptorCollection(props);
|
|
}
|
|
|
|
/// <devdoc>
|
|
/// <para>Gets a value indicating whether this object
|
|
/// supports properties.</para>
|
|
/// </devdoc>
|
|
public override bool GetPropertiesSupported(ITypeDescriptorContext context) {
|
|
return true;
|
|
}
|
|
|
|
private class ArrayPropertyDescriptor : SimplePropertyDescriptor {
|
|
private int index;
|
|
|
|
public ArrayPropertyDescriptor(Type arrayType, Type elementType, int index) : base(arrayType, "[" + index + "]", elementType, null) {
|
|
this.index = index;
|
|
}
|
|
|
|
public override object GetValue(object instance) {
|
|
if (instance is Array) {
|
|
Array array = (Array)instance;
|
|
if (array.GetLength(0) > index) {
|
|
return array.GetValue(index);
|
|
}
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
public override void SetValue(object instance, object value) {
|
|
if (instance is Array) {
|
|
Array array = (Array)instance;
|
|
if (array.GetLength(0) > index) {
|
|
array.SetValue(value, index);
|
|
}
|
|
|
|
OnValueChanged(instance, EventArgs.Empty);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|