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	<title>TiagoFigueira.com &#187; VB.NET IsNull</title>
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		<title>IsNull em VB.NET</title>
		<link>http://tiagofigueira.com/isnull-em-vb-net/435/</link>
		<comments>http://tiagofigueira.com/isnull-em-vb-net/435/#comments</comments>
		<pubDate>Wed, 30 Dec 2009 23:27:32 +0000</pubDate>
		<dc:creator>tiago</dc:creator>
				<category><![CDATA[asp.net]]></category>
		<category><![CDATA[VB.NET IsNull]]></category>

		<guid isPermaLink="false">http://tiagofigueira.com/?p=435</guid>
		<description><![CDATA[Estava aqui de volta de um site feito em ASP.NET (VB.NET) e estava-me a fazer falta o IsNull do C#. Solução? Utilizar o &#8220;Is Nothing&#8221; Exemplo: If (Not Request.QueryString(&#34;accao&#34;) Is Nothing) Then Response.Write(&#34; A variavel 'accao' = &#34; &#38; Request.QueryString(&#34;accao&#34;)) End If]]></description>
			<content:encoded><![CDATA[<p>Estava aqui de volta de um site feito em ASP.NET (VB.NET) e estava-me a fazer falta o <strong>IsNull </strong>do C#.<br />
Solução? Utilizar o &#8220;<strong>Is Nothing</strong>&#8221; <img src='http://tiagofigueira.com/wp-includes/images/smilies/icon_smile.gif' alt=':)' class='wp-smiley' /> </p>
<p>Exemplo:</p>
<pre class="brush: vb;">
If (Not Request.QueryString(&quot;accao&quot;) Is Nothing) Then
   Response.Write(&quot; A variavel 'accao' = &quot; &amp; Request.QueryString(&quot;accao&quot;))
End If
</pre>
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