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	<title>Visual Basic Q&#38;A &#187; System</title>
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	<description>Visual Basic Questions and Answers, VB QA</description>
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			<item>
		<title>FIX: You cannot insert empty string into Memo, Text, nText, or Blob columns</title>
		<link>http://jack-fx.com/vbqa/2011/08/16/fix-you-cannot-insert-empty-string-into-memo-text-ntext-or-blob-columns/</link>
		<comments>http://jack-fx.com/vbqa/2011/08/16/fix-you-cannot-insert-empty-string-into-memo-text-ntext-or-blob-columns/#comments</comments>
		<pubDate>Wed, 17 Aug 2011 09:56:04 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[data provider]]></category>
		<category><![CDATA[empty string]]></category>
		<category><![CDATA[empty strings]]></category>
		<category><![CDATA[exception]]></category>
		<category><![CDATA[InvalidOperationException]]></category>
		<category><![CDATA[memo text]]></category>
		<category><![CDATA[ntext]]></category>
		<category><![CDATA[OLE]]></category>
		<category><![CDATA[string]]></category>
		<category><![CDATA[System]]></category>

		<guid isPermaLink="false">http://jack-fx.com/vbqa/2011/08/16/fix-you-cannot-insert-empty-string-into-memo-text-ntext-or-blob-columns/</guid>
		<description><![CDATA[Symptoms When you try to insert an empty string into Memo, Text,		nText or Blob columns by using the OLE DB .NET data provider, you receive the		following exception: 
 An unhandled exception of type		&#8216;System.InvalidOperationException&#8217; occurred in system.data.dll  If		you handle this exception within a try-catch block, you receive the following information:		
 System.InvalidOperationException		System.Data.OleDb.OleDbException: Multiple-Step OLE DB operation [...]]]></description>
		<wfw:commentRss>http://jack-fx.com/vbqa/2011/08/16/fix-you-cannot-insert-empty-string-into-memo-text-ntext-or-blob-columns/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Error message occurs when you run commands on a command object: &#8220;Unhandled exception of type &#8216;System.InvalidOperationException&#8217;&#8221;</title>
		<link>http://jack-fx.com/vbqa/2011/07/20/error-message-occurs-when-you-run-commands-on-a-command-object-unhandled-exception-of-type-system-invalidoperationexception/</link>
		<comments>http://jack-fx.com/vbqa/2011/07/20/error-message-occurs-when-you-run-commands-on-a-command-object-unhandled-exception-of-type-system-invalidoperationexception/#comments</comments>
		<pubDate>Thu, 21 Jul 2011 08:30:59 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[code]]></category>
		<category><![CDATA[connection]]></category>
		<category><![CDATA[Data]]></category>
		<category><![CDATA[declarations section]]></category>
		<category><![CDATA[Dim]]></category>
		<category><![CDATA[executereader]]></category>
		<category><![CDATA[General Declarations]]></category>
		<category><![CDATA[microsoft visual studio]]></category>
		<category><![CDATA[Private Sub]]></category>
		<category><![CDATA[Read]]></category>
		<category><![CDATA[sqlcommand]]></category>
		<category><![CDATA[string user]]></category>
		<category><![CDATA[System]]></category>

		<guid isPermaLink="false">http://jack-fx.com/vbqa/2011/07/20/error-message-occurs-when-you-run-commands-on-a-command-object-unhandled-exception-of-type-system-invalidoperationexception/</guid>
		<description><![CDATA[SymptomsIf you run commands or call methods of the SqlCommand or OleDbCommand object, you receive the following error message if a connection is not open:
An unhandled exception of type &#8216;System.InvalidOperationException&#8217; occurred in system.data.dllAdditional information: ExecuteReader requires an open and available Connection (state=Closed).ResolutionThe DataAdapter object does not require that you explicitly open a connection to run [...]]]></description>
		<wfw:commentRss>http://jack-fx.com/vbqa/2011/07/20/error-message-occurs-when-you-run-commands-on-a-command-object-unhandled-exception-of-type-system-invalidoperationexception/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Compile error when you try to create an instance of System.Drawing.Imaging.PropertyItem</title>
		<link>http://jack-fx.com/vbqa/2010/11/23/compile-error-when-you-try-to-create-an-instance-of-system-drawing-imaging-propertyitem/</link>
		<comments>http://jack-fx.com/vbqa/2010/11/23/compile-error-when-you-try-to-create-an-instance-of-system-drawing-imaging-propertyitem/#comments</comments>
		<pubDate>Tue, 23 Nov 2010 10:04:37 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[error messages]]></category>
		<category><![CDATA[image files]]></category>
		<category><![CDATA[Imaging]]></category>
		<category><![CDATA[object]]></category>
		<category><![CDATA[PropertyItem]]></category>
		<category><![CDATA[public constructor]]></category>
		<category><![CDATA[System]]></category>
		<category><![CDATA[Visual]]></category>
		<category><![CDATA[visual c 2005]]></category>

		<guid isPermaLink="false">http://jack-fx.com/vbqa/2010/11/23/compile-error-when-you-try-to-create-an-instance-of-system-drawing-imaging-propertyitem/</guid>
		<description><![CDATA[SymptomsWhen you try to create an instance of a PropertyItem object in a project that you try to compile, you receive one of		the following error messages:Visual Basic .NET Error
&#8216;System.Drawing.Imaging.PropertyItem.Private		Overloads Sub New()&#8217; is not accessible in this context because it is		&#8216;Private&#8217;.Visual Basic 2005 Error
error BC30251: Type &#8216;System.Drawing.Imaging.PropertyItem&#8217; has no constructors.Visual C# .NET Error
&#8216;System.Drawing.Imaging.PropertyItem.PropertyItem()&#8217; is		inaccessible due to [...]]]></description>
		<wfw:commentRss>http://jack-fx.com/vbqa/2010/11/23/compile-error-when-you-try-to-create-an-instance-of-system-drawing-imaging-propertyitem/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>BUG: &#8220;Public Overrides WriteOnly Property&#8230;&#8221; error when you try to override a Microsoft Visual Basic 6.0 property in Microsoft Visual Basic .NET</title>
		<link>http://jack-fx.com/vbqa/2010/06/06/bug-public-overrides-writeonly-property-error-when-you-try-to-override-a-microsoft-visual-basic-6-0-property-in-microsoft-visual-basic-net/</link>
		<comments>http://jack-fx.com/vbqa/2010/06/06/bug-public-overrides-writeonly-property-error-when-you-try-to-override-a-microsoft-visual-basic-6-0-property-in-microsoft-visual-basic-net/#comments</comments>
		<pubDate>Sun, 06 Jun 2010 15:26:54 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[class]]></category>
		<category><![CDATA[compilation error]]></category>
		<category><![CDATA[IntPtr]]></category>
		<category><![CDATA[Microsoft]]></category>
		<category><![CDATA[microsoft visual basic 6]]></category>
		<category><![CDATA[parameters]]></category>
		<category><![CDATA[property]]></category>
		<category><![CDATA[return]]></category>
		<category><![CDATA[System]]></category>
		<category><![CDATA[visual basic 6]]></category>

		<guid isPermaLink="false">http://jack-fx.com/vbqa/2010/06/06/bug-public-overrides-writeonly-property-error-when-you-try-to-override-a-microsoft-visual-basic-6-0-property-in-microsoft-visual-basic-net/</guid>
		<description><![CDATA[SymptomsYou have a Microsoft Visual Basic 6.0 class that has a		property with the ByRef parameter. When you inherit the class in Visual Basic .NET and		override the property, you receive the following compilation error:		
&#8216;Public Overrides WriteOnly Property myProp() As		System.IntPtr&#8217; cannot override &#8216;Public Overridable Overloads WriteOnly Property		myProp() As System.IntPtr&#8217; because they differ by their return		types.ResolutionThe .NET runtime [...]]]></description>
		<wfw:commentRss>http://jack-fx.com/vbqa/2010/06/06/bug-public-overrides-writeonly-property-error-when-you-try-to-override-a-microsoft-visual-basic-6-0-property-in-microsoft-visual-basic-net/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>How to use Package and Deployment Wizard installation macros</title>
		<link>http://jack-fx.com/vbqa/2010/02/13/how-to-use-package-and-deployment-wizard-installation-macros/</link>
		<comments>http://jack-fx.com/vbqa/2010/02/13/how-to-use-package-and-deployment-wizard-installation-macros/#comments</comments>
		<pubDate>Sun, 14 Feb 2010 03:49:26 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[data access]]></category>
		<category><![CDATA[application directory]]></category>
		<category><![CDATA[common system]]></category>
		<category><![CDATA[Files]]></category>
		<category><![CDATA[files windows]]></category>
		<category><![CDATA[macro]]></category>
		<category><![CDATA[pdw]]></category>
		<category><![CDATA[Setup]]></category>
		<category><![CDATA[System]]></category>
		<category><![CDATA[system subdirectory]]></category>
		<category><![CDATA[Windows]]></category>

		<guid isPermaLink="false">http://jack-fx.com/vbqa/2010/02/13/how-to-use-package-and-deployment-wizard-installation-macros/</guid>
		<description><![CDATA[SymptomsInstallation macros can be used throughout the steps of the Package andDeployment Wizard (PDW) to install files to specific locations. Thisarticle documents the available installation macros and what the macroswill equate to during the installation process.ResolutionThese macros will be used by both Setup.exe and Setup1.exe to install filesto common system directories. These macros may be [...]]]></description>
		<wfw:commentRss>http://jack-fx.com/vbqa/2010/02/13/how-to-use-package-and-deployment-wizard-installation-macros/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>How to sum the fields in a Windows Forms DataGrid control and then display the calculated totals in a footer by using Visual Basic .NET</title>
		<link>http://jack-fx.com/vbqa/2010/02/08/how-to-sum-the-fields-in-a-windows-forms-datagrid-control-and-then-display-the-calculated-totals-in-a-footer-by-using-visual-basic-net/</link>
		<comments>http://jack-fx.com/vbqa/2010/02/08/how-to-sum-the-fields-in-a-windows-forms-datagrid-control-and-then-display-the-calculated-totals-in-a-footer-by-using-visual-basic-net/#comments</comments>
		<pubDate>Tue, 09 Feb 2010 00:26:21 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[exception]]></category>
		<category><![CDATA[click]]></category>
		<category><![CDATA[control]]></category>
		<category><![CDATA[DataGridControlVB]]></category>
		<category><![CDATA[footer row]]></category>
		<category><![CDATA[form]]></category>
		<category><![CDATA[microsoft ado]]></category>
		<category><![CDATA[microsoft windows 2000]]></category>
		<category><![CDATA[microsoft windows server]]></category>
		<category><![CDATA[microsoft windows xp]]></category>
		<category><![CDATA[System]]></category>

		<guid isPermaLink="false">http://jack-fx.com/vbqa/2010/02/08/how-to-sum-the-fields-in-a-windows-forms-datagrid-control-and-then-display-the-calculated-totals-in-a-footer-by-using-visual-basic-net/</guid>
		<description><![CDATA[SymptomsTo sum the fields in a Microsoft Windows Forms DataGrid control and then to display the calculated totals in a footer, you must first create a user control that inherits from the System.Windows.Forms.DataGrid class. Then you must handle the events that are raised when a cell in this user control is changed.You must disable the [...]]]></description>
		<wfw:commentRss>http://jack-fx.com/vbqa/2010/02/08/how-to-sum-the-fields-in-a-windows-forms-datagrid-control-and-then-display-the-calculated-totals-in-a-footer-by-using-visual-basic-net/feed/</wfw:commentRss>
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