</ iframe > </noscript> <!-- End Google Tag Manager (noscript) --> <input type="hidden" id="userDataCache" class="userDataStyle" name="userDataCache"> <input type="hidden" id="hiddenScrollOffset" name="hiddenScrollOffset"> <img id="collapseImage" style="display:none; height:0; width:0;" src="dotnetimages/collapse.gif"> <img id="expandImage" style="display:none; height:0; width:0;" src="dotnetimages/expand.gif"> <img id="collapseAllImage" style="display:none; height:0; width:0;" src="dotnetimages/collapse.gif"> <img id="expandAllImage" style="display:none; height:0; width:0;" src="dotnetimages/expand.gif"> <img id="dropDownImage" style="display:none; height:0; width:0;" src="dotnetimages/drpdown.gif"> <img id="dropDownHoverImage" style="display:none; height:0; width:0;" src="dotnetimages/drpdown_orange.gif"> <img id="copyImage" style="display:none; height:0; width:0;" src="dotnetimages/copycode.gif"> <img id="copyHoverImage" style="display:none; height:0; width:0;" src="dotnetimages/copycodeHighlight.gif"> <div id="pagetop"> <table width="100%" id="pagetoptable1"> <tr id="pagetoptable1row1"> <td align="left"> <span id="projecttitle"> DataDynamics.Reports </span> </td> <td align="right"> <span id="feedbacklink"> <a href="http://www.datadynamics.com/forums/78/ShowForum.aspx">Support Forum</a></span></td> </tr> <tr id="pagetoptable1row2"> <td align="left" colspan="2"> <span id="pagetitle"> IsValid Method </span> </td> </tr> <tr id="pagetoptable1row3"> <td colspan="2"> <a href="#seealsobookmark" onclick="javascript:openSectionById('seeAlsoSectionHeader');">See Also</a> </td> </tr> </table> <table width="100%" id="pagetoptable2" cellspacing="0" cellpadding="0"> <tr> <td> <span id="toggleExpandedAll"> <img id="toggleExpandedAllImage" class="toggleAll" src="dotnetimages/collapse.gif"> <label id="collapseAllLabel" for="toggleExpandedAllImage" style="display: none;">Collapse All</label> <label id="expandAllLabel" for="toggleExpandedAllImage" style="display: none;">Expand All</label> </span> <span id="languageFilterToolTip" style="cursor:default;" onclick="showBox('dxlanguagemenu',event,document.getElementById('languageFilterImage'))" onmouseover='document.getElementById("languageFilterImage").src=document.getElementById("dropDownHoverImage").src;' onfocusin='document.getElementById("languageFilterImage").src=document.getElementById("dropDownHoverImage").src;' onmouseout='document.getElementById("languageFilterImage").src=document.getElementById("dropDownImage").src;' onfocusout='document.getElementById("languageFilterImage").src=document.getElementById("dropDownImage").src;'> <img id="languageFilterImage" src="dotnetimages/drpdown.gif"> <label id="showAllLabel" for="languageFilterImage" style="display: none;"> Language Filter: All </label> <label id="multipleLabel" for="languageFilterImage" style="display: none;"> Language Filter: Multiple </label> <label id="VBLabel" for="languageFilterImage" style="display: none;">Language Filter: Visual Basic (Declaration)</label> <label id="CSLabel" for="languageFilterImage" style="display: none;">Language Filter: C#</label> </span> </td> </tr> </table> <table width="100%" id="pagetopbreadcrumbs" cellspacing="0" cellpadding="0"><tr><td> <a href="DataDynamics.Reports~DataDynamics.Reports.Expressions_namespace.html">DataDynamics.Reports.Expressions Namespace</a> > <a href="DataDynamics.Reports~DataDynamics.Reports.Expressions.IExpressionEvaluatorService.html">IExpressionEvaluatorService Interface</a> : IsValid Method</td></tr></table> <div class="dxpopupbubble" id="dxlanguagemenu"> <input id="VBCheckbox" type="checkbox" name="languageFilter" onclick="setLanguage(this)"> <label class="languageFilter" for="VBCheckbox"> Visual Basic (Declaration) </label> <br><input id="CSCheckbox" type="checkbox" name="languageFilter" onclick="setLanguage(this)"> <label class="languageFilter" for="CSCheckbox"> C# </label> </div> <div id="expression_box" class="dxpopupbubble"> <dl><dt class="popupbubble"><i>expression</i></dt> <dd class="popupbubble"> The <a href="DataDynamics.Reports~DataDynamics.Reports.Expressions.ExpressionInfo.html">ExpressionInfo</a> object to evaluate.</dd></dl> </div> </div> <div id="pagebody" valign="bottom"> <a name="topBookmark"></a> <div id="mainbody"> <div id="allHistory" class="saveHistory" onsave="saveAll()" onload="loadAll()"> </div> Determines whether the <a href="DataDynamics.Reports~DataDynamics.Reports.Expressions.ExpressionInfo.html">ExpressionInfo</a> object is an expression that can potentially be evaluated. Expressions with invalid syntax return false. <h1 class="heading"><span class="expandcollapse" tabindex="0"><img id="syntaxToggle" class="toggle" name="toggleSwitch" src="dotnetimages/collapse.gif">Syntax</span></h1><div id="syntaxSection" class="section" name="collapseableSection"><div class="LanguageSpecific" id="Syntax_VB"><table class="syntaxtable" width="100%" cellpadding="0" cellspacing="0"><tr><th>Visual Basic (Declaration)</th><th> </th></tr><tr><td colspan="2"><pre>Function IsValid( _ ByVal <i><a class="parameter" id="expression" href="#" onclick="javascript:showParamBox(event);">expression</a></i> As <a href="DataDynamics.Reports~DataDynamics.Reports.Expressions.ExpressionInfo.html">ExpressionInfo</a> _ ) As <a href="#" onclick="javascript:navigateToHelp2Keyword('frlrfSystemBooleanClassTopic','System.Boolean')">Boolean</a></pre></td></tr></table></div> <div class="LanguageSpecific" id="Syntax_CS"><table class="syntaxtable" width="100%" cellpadding="0" cellspacing="0"><tr><th>C#</th><th> </th></tr><tr><td colspan="2"><pre><a href="#" onclick="javascript:navigateToHelp2Keyword('frlrfSystemBooleanClassTopic','System.Boolean')">bool</a> IsValid( <a href="DataDynamics.Reports~DataDynamics.Reports.Expressions.ExpressionInfo.html">ExpressionInfo</a> <i><a class="parameter" id="expression" href="#" onclick="javascript:showParamBox(event);">expression</a></i> )</pre></td></tr></table></div> <h4 class="dxh4">Parameters</h4><dl><dt><i>expression</i></dt> <dd> The <a href="DataDynamics.Reports~DataDynamics.Reports.Expressions.ExpressionInfo.html">ExpressionInfo</a> object to evaluate.</dd></dl> <h4 class="dxh4">Return Value</h4>True if the syntax is valid, otherwise False.</div> <a name="exampleBookmark"></a> <a name="seealsobookmark"></a> <h1 class="heading"><span class="expandcollapse" tabindex="0"><img id="seealsoToggle" class="toggle" name="toggleSwitch" src="dotnetimages/collapse.gif">See Also</span></h1><div id="seealsoSection" class="section" name="collapseableSection"><h4 class="dxh4">Reference</h4><a href="DataDynamics.Reports~DataDynamics.Reports.Expressions.IExpressionEvaluatorService.html">IExpressionEvaluatorService Interface</a> <br><a href="DataDynamics.Reports~DataDynamics.Reports.Expressions.IExpressionEvaluatorService_members.html">IExpressionEvaluatorService Members</a> <p> </div> </div> <div id="pagefooter"> </div> </div> <div id="nonscrollingpagefooter">©2010. 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