防止组合框中的值重复 [英] to prevent duplicate values in combo box

问题描述

大家好，
这是问题！
我必须从xml读取组合框中的值，而不必复制来自根节点的不同子节点的任何值..我该怎么做?

thnx ...

hi all ,
here is the question !
I have to read values in the combo box from an xml without duplicating any value coming from different child nodes of the root node .. .how can i do this ?

thnx ...

推荐答案

为什么似乎有问题?

这是XML不同解析方法的概述:

Why it seems to be a problem?

Here is the overview of XML different parsing approaches:

1. 使用System.Xml.XmlDocument类.它实现了DOM接口；如果文档太大，则这种方法最简单，也足够好.
   请参见
2. 使用类System.Xml.XmlTextReader; library/system.xml.xmldocument.aspx"target =" _ blank"title =" New Window> ^ ].
3. 使用类System.Xml.XmlTextReader;这是最快的读取方法，尤其是您需要跳过一些数据.
   请参见 http://msdn.microsoft.com/en-us/library/system.xml.xmlreader.aspx [ http://msdn.microsoft.com/en-us/library/system.xml.xmldocument.aspx [http://msdn.microsoft.com/en-us/library/bb387063.aspx [

1. Use System.Xml.XmlDocument class. It implements DOM interface; this way is the easiest and good enough if the size if the document is not too big.
   See http://msdn.microsoft.com/en-us/library/system.xml.xmldocument.aspx[^].
2. Use the class System.Xml.XmlTextReader; this is the fastest way of reading, especially is you need to skip some data.
   See http://msdn.microsoft.com/en-us/library/system.xml.xmlreader.aspx[^].
3. Use the class System.Xml.Linq.XDocument; this is the most adequate way similar to that of XmlDocument, supporting LINQ to XML Programming.
   See http://msdn.microsoft.com/en-us/library/system.xml.xmldocument.aspx[^], http://msdn.microsoft.com/en-us/library/bb387063.aspx[^].

为防止重复，请使用System.Collections.Generic.Dictionary;它支持唯一键；请参阅 http://msdn.microsoft.com/en-us/library /xfhwa508%28v=VS.100%29.aspx [ ^ ].

—SA

To prevent duplication, use System.Collections.Generic.Dictionary; it supports unique keys; see http://msdn.microsoft.com/en-us/library/xfhwa508%28v=VS.100%29.aspx[^].

—SA

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