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POCreate ASP.NET ReportViewer in a child control in ASP.NET; Document Map button breaks
 

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  1. POCreate ASP.NET ReportViewer in a child control in ASP.NET; Document Map button breaks
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    <p>We are having a strange issue with the Visual Studio 2008 ReportViewer control. Specifically, when we have a child control on a page, and the child control itself hosts a report viewer, and the report has a document map, the postback on the show/hide document map button seems to be lost, so the document map never disappears. I played with IPostBackEventHandler and didn't seem to get anywhere; the ReportViewer itself implements that interface so I didn't think I cared. Anyway, here's the code:</p> <p>Default.aspx:</p> <pre><code>&lt;%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="ReportViewerDocumentMapButtonStrippedExample._Default" %&gt; &lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt; &lt;html xmlns="http://www.w3.org/1999/xhtml" &gt; &lt;head runat="server"&gt; &lt;title&gt;&lt;/title&gt; &lt;/head&gt; &lt;body&gt; &lt;form id="form1" runat="server"&gt; &lt;div runat="server" id="div"&gt; &lt;/div&gt; &lt;/form&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>Default.aspx.cs:</p> <pre><code>using System; namespace ReportViewerDocumentMapButtonStrippedExample { public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected override void CreateChildControls() { base.CreateChildControls(); FindControl("div").Controls.Add(new rvControl()); } } } </code></pre> <p>rvControl.cs:</p> <pre><code>using System.Collections.Generic; using System.Web.UI.HtmlControls; using System.Web.UI.WebControls; using Microsoft.Reporting.WebForms; namespace ReportViewerDocumentMapButtonStrippedExample { public class rvControl : HtmlGenericControl { protected override void CreateChildControls() { base.CreateChildControls(); var rvMain = new ReportViewer { EnableViewState = true, ProcessingMode = ProcessingMode.Remote, ShowRefreshButton = false, AsyncRendering = true, Width = new Unit(100, UnitType.Percentage), Height = new Unit(2000, UnitType.Pixel), ShowCredentialPrompts = false, ID = "viewer", }; rvMain.ServerReport.ReportPath = "/some/report/name"; Controls.Add(rvMain); } } } </code></pre> <p>Anyone have an idea on this?</p>
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    1. USMikeBaz - MSFT
    1. USMikeBaz - MSFT
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    1. COJust to follow up on this question, we talked with Microsoft about this. For 2008, it's unlikely anything will change, unless a case is opened and pushed. For 2010, they are looking at this (the failure is worse in that case - no report is visible due to infinite postbacks) and can readily reproduce the failure mode.
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      1. USMikeBaz - MSFT
 

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