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POGridview disappearing on link click
 

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    <p>I have a real precarious situation where my GridView disappears when a link is clicked on our production server.</p> <p>It works like this:</p> <ul> <li>User does a search, GridView gets generated</li> <li>On page generation, a link gets generated</li> <li>user clicks on the link, and the GridView disappears.</li> </ul> <p>In the past I've experienced issues where only the links would disappear because the links were being generated to late in the page life-cycle. But this time it seems to be different.</p> <p>What makes this even more bizarre is that this only happens on our production/live server on IIS. If I create a new site under IIS with the exact same compiled code, exact same DB connection strings, etc, the GridView works.</p> <p>Here is the section that contains the GridView:</p> <pre><code>&lt;div class="PGE_SearchResult"&gt; &lt;asp:Panel ID="pnlWrapper" runat="server" CssClass="addSearchPanelStyle"&gt; &lt;asp:GridView ID="gvExistingPatientsSearch" runat="server" AutoGenerateColumns="false" DataKeyNames="PatientId" CssClass="addSearchGridViewStyle" AlternatingRowStyle-CssClass="STD_GridView_AlternateRow" RowStyle-CssClass="STD_GridView_Row" HeaderStyle-CssClass="gvFixedHeader" FooterStyle-CssClass="STD_GridView_Footer" OnRowDataBound="gvExistingPatientsSearch_RowDataBound"&gt; &lt;Columns&gt; &lt;asp:TemplateField HeaderText="Patient ID" ItemStyle-CssClass="PGS_PSR_PatientID"&gt; &lt;ItemTemplate&gt; &lt;asp:LinkButton ID="lnkPatientSearch" runat="server" Text='&lt;%# Bind("PatientId")%&gt;' OnClick="OnPatientIDClick" CommandArgument='&lt;%# Eval("PatientId")+ ";" + Eval("PatientStatus")+ ";" + Eval("DOB") + ";" + Eval("DiseaseStates") + ";" + Eval("DiseaseStateIds")%&gt;'&gt;&lt;/asp:LinkButton&gt; &lt;/ItemTemplate&gt; &lt;/asp:TemplateField&gt; &lt;asp:BoundField DataField="PatientName" HeaderText="Patient Name" ItemStyle-CssClass="PGS_PSR_Site"/&gt; &lt;asp:BoundField DataField="DOB" HeaderText="Date of Birth" HtmlEncode="False" ItemStyle-CssClass="PGS_PSR_DOB"/&gt; &lt;asp:TemplateField HeaderText="Site(s)" SortExpression="Site" ItemStyle-CssClass="PGS_PSR_Site"&gt; &lt;ItemTemplate&gt; &lt;asp:Label ID="lblSiteSearch" runat="server" Text='&lt;%# Bind("Site")%&gt;'&gt;&lt;/asp:Label&gt; &lt;/ItemTemplate&gt; &lt;/asp:TemplateField&gt; &lt;asp:BoundField DataField="SiteMRN" HeaderText="Site MRN" HtmlEncode="False" ItemStyle-CssClass="PGS_PSR_DOB"/&gt; &lt;asp:TemplateField HeaderText="Disease State(s)" ItemStyle-CssClass="PGS_PSR_Site"&gt; &lt;ItemTemplate&gt; &lt;asp:Panel ID="diseaseStatePanel" runat="server"&gt; &lt;/asp:Panel&gt; &lt;/ItemTemplate&gt; &lt;/asp:TemplateField&gt; &lt;/Columns&gt; &lt;/asp:GridView&gt; &lt;/div&gt; </code></pre> <p>The code that generates the rows for the GridView is this:</p> <pre><code> protected void gvExistingPatientsSearch_RowDataBound(object sender, GridViewRowEventArgs e) { DataRowView patientData = (DataRowView)e.Row.DataItem; string diseaseStates = patientData["DiseaseStates"] as string; string diseaseStateIds = patientData["DiseaseStateIDs"] as string; int PatientID = (int)patientData["PatientId"]; int patientStatus = (int)patientData["PatientStatus"]; DateTime DOB = DateTime.Parse(patientData["DOB"] as string); if (e.Row.RowIndex != -1) { e.Row.Cells[2].Enabled = true; LinkButton lnkPatientSearch = (LinkButton)e.Row.FindControl("lnkPatientSearch"); lnkPatientSearch.Enabled = false; Panel diseaseStatePanel = (Panel)e.Row.FindControl("diseaseStatePanel"); BuildDiseaseStateLinks(diseaseStatePanel, diseaseStates, diseaseStateIds, PatientID, patientStatus, DOB, true); } } </code></pre> <p>The following is the method <code>BuildDiseaseStatelinks()</code></p> <pre><code>private void BuildDiseaseStateLinks(Panel diseaseStatePanel, string diseaseStates, string diseaseStateIDs, int PatientID, int patientStatus, DateTime DOB, bool isAllowed) { string[] diseaseStateIdsSplit = diseaseStateIDs.Split(new char[] { '|' }, StringSplitOptions.RemoveEmptyEntries); string[] diseaseStateSplit = diseaseStates.Split(new char[] { '|' }, StringSplitOptions.RemoveEmptyEntries); for (int i = 0; i &lt; diseaseStateSplit.Length; i++) { string diseaseState = diseaseStateSplit[i]; string diseaseStateID = diseaseStateIdsSplit[i]; LinkButton diseaseStateLink = new LinkButton(); diseaseStateLink.Attributes.Add("style", "float:left"); diseaseStateLink.Text = diseaseState; diseaseStateLink.CommandArgument = PatientID + "|" + patientStatus + "|" + DOB.ToShortDateString() + "|" + diseaseState + "|" + diseaseStateID; if (isAllowed) { diseaseStateLink.CommandArgument += "|Allowed"; } else { diseaseStateLink.CommandArgument += "|NotAllowed"; } diseaseStateLink.CommandName = "OnDiseaseStateLinkClick"; diseaseStateLink.Command += new CommandEventHandler(OnDiseaseStateLinkClick); diseaseStatePanel.Controls.Add(diseaseStateLink); if (i &lt; diseaseStateSplit.Length - 1) { Label splitLabel = CreatePipeLabel(); diseaseStatePanel.Controls.Add(splitLabel); } } } </code></pre> <p>The <code>gvExistingPatientsSearch</code> gets bound in 2 places, when the search button is clicked, and on <code>Page_Load</code>, but only if the user was redirected to the current page with a search as the <code>QueryString</code>.</p> <p>Once a link has been clicked, a few <code>Session</code> variables get set (the ones found on the <code>CommandArguments</code> set in <code>BuildDiseaseStateLinks</code> and the user is redirected to another page.</p> <p>What could I possibly be missing? Code is the same, DB is the same, IIS settings are identical (except for the Application Pools, one is using classic (the Prod/Live) and the other Integrated; I switched Prod/Live to Integrated and that didn't do anything. </p> <p>Suggestions, comments, anything!</p> <p>Thanks in advance.</p> <p><strong>[EDIT]</strong>: Added some code as requested. Didn't originally do it since I figured the code may not be the issue. It works in one version and not the other.</p>
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    1. COHuh. I think you should show your code. There must be something specific to the parameters getting passed in.
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    2. COdoes your page contain updatepanel better show us Markup and also what that linkbutton do
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    3. COPerhaps there's an exception being thrown when you generate your GridView after your link postback? Have you checked for errors with try/catch?
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