a00015.html

一个symbian中解析xml的实例代码

          <td class="mdname" nowrap> <em>aPrefix</em>, </td>
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          <td class="md" nowrap align="right"></td>
          <td class="md"></td>
          <td class="md" nowrap>const TDesC &amp;&nbsp;</td>
          <td class="mdname" nowrap> <em>aName</em></td>
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          <td class="md">)&nbsp;</td>
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<p>
Intended Usage: Creates and empty element. 
<p>
Call SetNamespaceL and SetAttributeL functions to add attributs and namespaces to the element. <dl compact><dt><b>Exceptions:</b></dt><dd>
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    <tr><td valign="top"></td><td valign="top"><em>KErrNoMemory</em>&nbsp;</td><td>if no memory for buffer. </td></tr>
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</dl>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>aPrefix</em>&nbsp;</td><td>the namespace prefix of the element. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>aName</em>&nbsp;</td><td>the name of the element. </td></tr>
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</dl>
<dl compact><dt><b>Returns:</b></dt><dd>none </dd></dl>
<dl compact><dt><b>Precondition:</b></dt><dd>None </dd></dl>
<dl compact><dt><b>Postcondition:</b></dt><dd>The name is added to the context stack so must be kept until its respective EndElementL function is called. </dd></dl>
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<a class="anchor" name="CSyGeneratorBasea8" doxytag="CSyGeneratorBase::EmptyElementL"></a><p>
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          <td class="md" nowrap valign="top">void CSyGeneratorBase::EmptyElementL           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">const TDesC &amp;&nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>aName</em>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap></td>
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<p>
Intended Usage: Starts an element that is an empty element. 
<p>
<dl compact><dt><b>Exceptions:</b></dt><dd>
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    <tr><td valign="top"></td><td valign="top"><em>KErrNoMemory</em>&nbsp;</td><td>if no memory for buffer. </td></tr>
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</dl>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>aName</em>&nbsp;</td><td>the name of the element. </td></tr>
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</dl>
<dl compact><dt><b>Returns:</b></dt><dd>none </dd></dl>
<dl compact><dt><b>Precondition:</b></dt><dd>None </dd></dl>
<dl compact><dt><b>Postcondition:</b></dt><dd>The name is added to the context stack so must be kept until its respective EndElementL function is called. </dd></dl>
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<a class="anchor" name="CSyGeneratorBasea20" doxytag="CSyGeneratorBase::EndCDATAL"></a><p>
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          <td class="md" nowrap valign="top">void CSyGeneratorBase::EndCDATAL           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="mdname1" valign="top" nowrap>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap></td>
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<p>
Intended Usage: Ends a CDATA Section. 
<p>
This is used to end the current CDataSection <dl compact><dt><b>Exceptions:</b></dt><dd>
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    <tr><td valign="top"></td><td valign="top"><em>KErrNoMemory</em>&nbsp;</td><td>if no memory for buffer. </td></tr>
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</dl>
<dl compact><dt><b>Returns:</b></dt><dd>none </dd></dl>
<dl compact><dt><b>Precondition:</b></dt><dd>A CDATA Section must be already be open </dd></dl>
<dl compact><dt><b>Postcondition:</b></dt><dd>none </dd></dl>
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<a class="anchor" name="CSyGeneratorBasea3" doxytag="CSyGeneratorBase::EndDocumentL"></a><p>
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          <td class="md" nowrap valign="top">void CSyGeneratorBase::EndDocumentL           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="mdname1" valign="top" nowrap>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
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<p>
Intended Usage: Closes the XML document. 
<p>
If there are any pending unclosed elements then these will be flushed. <dl compact><dt><b>Exceptions:</b></dt><dd>
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    <tr><td valign="top"></td><td valign="top"><em>KErrNoMemory</em>&nbsp;</td><td>if no memory for buffer ELevelUnderRun if startdoc already called </td></tr>
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</dl>
<dl compact><dt><b>Returns:</b></dt><dd>none </dd></dl>
<dl compact><dt><b>Precondition:</b></dt><dd>None </dd></dl>
<dl compact><dt><b>Postcondition:</b></dt><dd>Nothing is left on the CleanupStack </dd></dl>
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<a class="anchor" name="CSyGeneratorBasea14" doxytag="CSyGeneratorBase::EndElementL"></a><p>
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          <td class="md" nowrap valign="top">void CSyGeneratorBase::EndElementL           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="mdname1" valign="top" nowrap>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap></td>
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<p>
Intended Usage: Writes out the end element text for the current element. 
<p>
If the current element is empty then it just closes the element <dl compact><dt><b>Exceptions:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>KErrNoMemory</em>&nbsp;</td><td>if no memory for buffer. </td></tr>
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</dl>
<dl compact><dt><b>Returns:</b></dt><dd>none </dd></dl>
<dl compact><dt><b>Precondition:</b></dt><dd>StartElement must have been called </dd></dl>
<dl compact><dt><b>Postcondition:</b></dt><dd>none </dd></dl>
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<a class="anchor" name="CSyGeneratorBasea5" doxytag="CSyGeneratorBase::EndFragmentL"></a><p>
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          <td class="md" nowrap valign="top">void CSyGeneratorBase::EndFragmentL           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="mdname1" valign="top" nowrap>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap></td>
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<p>
Intended Usage: Closes the XML fragment. 
<p>
<dl compact><dt><b>Exceptions:</b></dt><dd>
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    <tr><td valign="top"></td><td valign="top"><em>KErrNoMemory</em>&nbsp;</td><td>if no memory for buffer ELevelUnderRun if startdoc already called </td></tr>
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</dl>
<dl compact><dt><b>Returns:</b></dt><dd>none </dd></dl>
<dl compact><dt><b>Precondition:</b></dt><dd>None </dd></dl>
<dl compact><dt><b>Postcondition:</b></dt><dd>Nothing is left on the CleanupStack </dd></dl>
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<a class="anchor" name="CSyGeneratorBasea16" doxytag="CSyGeneratorBase::IgnorableWhitespaceL"></a><p>
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          <td class="md" nowrap valign="top">void CSyGeneratorBase::IgnorableWhitespaceL           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">const TDesC &amp;&nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>aCharacters</em>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap></td>
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<p>
Intended Usage: Writes out string to the output buffer. 
<p>
This is used to write out data between elements that is in effect whitespace This can be called multiple times to write out strings <dl compact><dt><b>Exceptions:</b></dt><dd>
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    <tr><td valign="top"></td><td valign="top"><em>KErrNoMemory</em>&nbsp;</td><td>if no memory for buffer. </td></tr>
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</dl>
<dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign="top"></td><td valign="top"><em>aCharacters</em>&nbsp;</td><td>the character data to be written out </td></tr>
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</dl>
<dl compact><dt><b>Returns:</b></dt><dd>none </dd></dl>
<dl compact><dt><b>Precondition:</b></dt><dd>StartElement must have been called </dd></dl>
<dl compact><dt><b>Postcondition:</b></dt><dd>none </dd></dl>
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<a class="anchor" name="CSyGeneratorBasef0" doxytag="CSyGeneratorBase::Panic"></a><p>
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          <td class="md" nowrap valign="top">void CSyGeneratorBase::Panic           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">const TInt&nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>aPanic</em>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap><code> [static, protected]</code></td>
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