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POASP (.NET 4) ViewState enabled Literal control not retaining changes to HTML contents on PostBack
 

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  1. POASP (.NET 4) ViewState enabled Literal control not retaining changes to HTML contents on PostBack
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    <p>I am populating a <code>ListView</code> with HTML from a database using a <code>Literal</code> with <code>Text='&lt;%#Eval("HTMLData")'%&gt;</code>. When I trigger a PostBack, changes to the loaded HTML are not being reflected in <code>litRowData.Text</code>.</p> <p><code>ViewState</code> is enabled for the page, the <code>ListView</code>, and the <code>Literal</code> in the <code>ItemTemplate</code>, and I am making sure to only populate the <code>ListView</code> with initial values from the database when <code>if(!IsPostBack)</code> is true in <code>Page_Load</code>.</p> <pre><code>&lt;asp:ListView ID="lvForm" runat="server" DataKeyNames="RowID" ItemPlaceholderID="phRow" EnableViewState="true"&gt; &lt;LayoutTemplate&gt; &lt;asp:PlaceHolder ID="phRow" runat="server" /&gt; &lt;/LayoutTemplate&gt; &lt;ItemTemplate&gt; &lt;asp:Literal ID="litRowData" runat="server" Text='&lt;%#Eval("HTMLData")%&gt;' EnableViewState="true"&gt;&lt;/asp:Literal&gt; &lt;/ItemTemplate&gt; &lt;/asp:ListView&gt; </code></pre> <p>I need to be able to capture changes to the contents of the loaded HTML controls. Since this HTML comes from a database table, I can't just use ASP controls inside the <code>ItemTemplate</code>. Can anyone see something I'm missing, or suggest an alternative way to do this?</p> <p><strong>Edit</strong>: To clarify a little more, I'm trying to load form input elements dynamically from a database, render them as HTML controls on the page, allow the user to modify their contents by entering text or selecting options, then capture the modified HTML and save it back to the database when the user clicks a save button.</p>
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    1. COYou say you're only binding data on `!IsPostBack` (i.e. on first page load), and "When I trigger a PostBack, changes to the loaded HTML are not being reflected..." Why can't you bind `lvForm` regardless of `IsPostBack`?
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    2. COYes, the data is loaded on first Page_Load (!IsPostBack), then the user alters the state of the loaded HTML controls and triggers a PostBack with a save button, but the changed HTML state is not reflected in `litRowData.Text`.
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    3. CO@maxp: To clarify, if I bound lvForm on every PostBack it would overwrite the HTML with its original state in the database.
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