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POXmlTextWriter responds with System.InvalidOperationException during creation of second element
 

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  1. POXmlTextWriter responds with System.InvalidOperationException during creation of second element
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    <p>I am having trouble with XMLTextWriter.WriteStartElement throwing an exception:</p> <pre><code>System.InvalidOperationException </code></pre> <p>when trying to write the second element in my XML document.<br> This error comes back as <a href="http://msdn.microsoft.com/en-us/library/t8t5yhhk.aspx" rel="nofollow noreferrer">"The Writer is closed"</a>. I have not closed it, so I am guessing it has fallen out of scope??<br> I have created a class to write an XML file using XMLTextWriter as an object within my class. Below is the relevant code. I have found one other post on <a href="http://www.google.com/url?sa=t&amp;source=web&amp;ct=res&amp;cd=1&amp;url=http%3A%2F%2Fcodeguru.earthweb.com%2Fforum%2Fshowthread.php%3Ft%3D471773&amp;ei=dq6mSoHvOJKEnQeK_ImxBw&amp;usg=AFQjCNExYpu6Ukw4M0L8zjpFIAjSl6bQCA&amp;sig2=cJUkoPHrCrL6rX92GOQd-g" rel="nofollow noreferrer">codeguru</a> that was never answered with the exact same issue. Any ideas for workarounds or otherwise would be appreciated.</p> <pre><code>Function CreateXML()... Try _listDocument = New XmlTextWriter(_xmlDI.FullName &amp; "\\" &amp; currentFilename, Nothing) CreateHeader() AddTimeDateNode() CreateXML = True Catch xmlErr As XmlException MsgBox("Unable to create temporary file(" &amp; currentFilename &amp; ") that is used to change your whitelist or blacklist. " &amp; _ "More technical information: " &amp; xmlErr.Message, MsgBoxStyle.Critical, "Can't Continue") End Try End Function Function AddListMember(ByVal listType As String, ByVal listItem As String, ByVal action As String) As Boolean _listDocument.WriteStartElement(listItem) &lt;-- CODE THROWS EXCEPTION HERE! _listDocument.WriteAttributeString("listType", listType) _listDocument.WriteAttributeString("action", action) _listDocument.WriteString(listItem) _listDocument.WriteEndElement() _listDocument.WriteWhitespace(Chr(13) &amp; Chr(10) &amp; "\t") Return True End Function 'Sets the XML header Private Function CreateHeader() As Boolean _listDocument.WriteStartDocument(False) _listDocument.WriteWhitespace(Chr(13) &amp; Chr(10)) Return True End Function 'Add Time Date node Private Function AddTimeDateNode() As Boolean _listDocument.WriteStartElement("DateTimeAdded") _listDocument.WriteString(DateTime.Now.ToString) _listDocument.WriteEndElement() _listDocument.WriteWhitespace(Chr(13) &amp; Chr(10)) Return True End Function </code></pre> <p>I am calling these functions after instantiating a dimension from ListXML (the name of my class) with the following code:</p> <pre><code>Dim xmloutput As New ListXML xmloutput.CreateXML() xmloutput.AddListMember(xmloutput.ReturnWhiteList, currentItem.SenderEmailAddress, xmloutput.ReturnAddAction) </code></pre>
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    1. USScott Lundberg
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