本文整理汇总了C#中System.Collections.Specialized.NameObjectCollectionBase.IsReadOnly属性的典型用法代码示例。如果您正苦于以下问题：C# NameObjectCollectionBase.IsReadOnly属性的具体用法？C# NameObjectCollectionBase.IsReadOnly怎么用？C# NameObjectCollectionBase.IsReadOnly使用的例子？那么恭喜您, 这里精选的属性代码示例或许可以为您提供帮助。您也可以进一步了解该属性所在类System.Collections.Specialized.NameObjectCollectionBase的用法示例。
在下文中一共展示了NameObjectCollectionBase.IsReadOnly属性的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: DictionaryEntry
//引入命名空间
using System;
using System.Collections;
using System.Collections.Specialized;
public class MyCollection : NameObjectCollectionBase {
private DictionaryEntry _de = new DictionaryEntry();
// Gets a key-and-value pair (DictionaryEntry) using an index.
public DictionaryEntry this[ int index ] {
get {
_de.Key = this.BaseGetKey( index );
_de.Value = this.BaseGet( index );
return( _de );
}
}
// Adds elements from an IDictionary into the new collection.
public MyCollection( IDictionary d, Boolean bReadOnly ) {
foreach ( DictionaryEntry de in d ) {
this.BaseAdd( (String) de.Key, de.Value );
}
this.IsReadOnly = bReadOnly;
}
// Adds an entry to the collection.
public void Add( String key, Object value ) {
this.BaseAdd( key, value );
}
}
public class SamplesNameObjectCollectionBase {
public static void Main() {
// Creates and initializes a new MyCollection that is read-only.
IDictionary d = new ListDictionary();
d.Add( "red", "apple" );
d.Add( "yellow", "banana" );
d.Add( "green", "pear" );
MyCollection myROCol = new MyCollection( d, true );
// Tries to add a new item.
try {
myROCol.Add( "blue", "sky" );
}
catch ( NotSupportedException e ) {
Console.WriteLine( e.ToString() );
}
// Displays the keys and values of the MyCollection.
Console.WriteLine( "Read-Only Collection:" );
PrintKeysAndValues( myROCol );
}
public static void PrintKeysAndValues( MyCollection myCol ) {
for ( int i = 0; i < myCol.Count; i++ ) {
Console.WriteLine( "[{0}] : {1}, {2}", i, myCol[i].Key, myCol[i].Value );
}
}
}输出：
System.NotSupportedException: Collection is read-only. at System.Collections.Specialized.NameObjectCollectionBase.BaseAdd(String name, Object value) at SamplesNameObjectCollectionBase.Main() Read-Only Collection: [0] : red, apple [1] : yellow, banana [2] : green, pear