本文整理汇总了C#中System.Collections.Specialized.NameObjectCollectionBase.BaseHasKeys方法的典型用法代码示例。如果您正苦于以下问题：C# NameObjectCollectionBase.BaseHasKeys方法的具体用法？C# NameObjectCollectionBase.BaseHasKeys怎么用？C# NameObjectCollectionBase.BaseHasKeys使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Collections.Specialized.NameObjectCollectionBase的用法示例。
在下文中一共展示了NameObjectCollectionBase.BaseHasKeys方法的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 );
}
}
// Creates an empty collection.
public MyCollection() {
}
// Adds an entry to the collection.
public void Add( String key, Object value ) {
this.BaseAdd( key, value );
}
// Gets a value indicating whether the collection contains keys that are not a null reference.
public Boolean HasKeys {
get {
return( this.BaseHasKeys() );
}
}
}
public class SamplesNameObjectCollectionBase {
public static void Main() {
// Creates an empty MyCollection instance.
MyCollection myCol = new MyCollection();
Console.WriteLine( "Initial state of the collection (Count = {0}):", myCol.Count );
PrintKeysAndValues( myCol );
Console.WriteLine( "HasKeys? {0}", myCol.HasKeys );
Console.WriteLine();
// Adds an item to the collection.
myCol.Add( "blue", "sky" );
Console.WriteLine( "Initial state of the collection (Count = {0}):", myCol.Count );
PrintKeysAndValues( myCol );
Console.WriteLine( "HasKeys? {0}", myCol.HasKeys );
}
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：
Initial state of the collection (Count = 0): HasKeys? False Initial state of the collection (Count = 1): [0] : blue, sky HasKeys? True