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POAsp.net Gridview - Why Are DataRowBound changes Lost on sort?
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  1. POAsp.net Gridview - Why Are DataRowBound changes Lost on sort?
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    copied!<p>I am making conditional formatting changes to the data in my gridview using a RowDataBound event:</p> <pre><code> void gvReg_RowDataBound(object sender, GridViewRowEventArgs e) { if (e.Row.RowType == DataControlRowType.DataRow) { DateTime lastUpdate DateTime.Parse(DataBinder.Eval (e.Row.DataItem, "LAST_UPDATE"); if (lastUpdate &lt; DateTime.Today.AddMonths(-1)) { Hyperlink hypLastUpdate = (Hyperlink)e.Row.FindControl("hypLastUpdate"; hypLastUpdate.CssClass = "Error"; hypLastUpdate.NavigateUrl = "http://www.someExampleErrorPage.com"; } } } </code></pre> <p>This works, and sets the proper CssClass to the hyperlink (which makes it a jarring shade of bold red), but once the gridview is sorted (via the user clicking a column heading) the css class is reset on hypLastUpdate and it loses both it's style and associated NavigateUrl property.</p> <p>The control hypLastUpdate is contained in a template field in a gridview, and it's text value is databound to a field called "LAST_UPDATE".</p> <p>Is this a planned behavior (is sorting supposed to break the conditional formatting done in RowDataBound events?) or is there something I can check to make sure I am not doing something incorrectly?</p> <p>I am not using the DataBind method anywhere in the code behind, and viewstate is turned on for the gridview in question.</p> <p>--EDIT--</p> <p>It ended up being a mistake in event handling.</p> <p>I was doing:</p> <pre><code>gvReg.Sorted += {SomeEventHandler} </code></pre> <p>Inside of the page load event, but only when it wasn't a postback. This function called gvReg.DataBind after the grid view was sorted. I removed the handler wire up and instead added the event handler function to the OnSorted event. I guess assigned delegates to a gridview are not saved in ViewState between callbacks?</p>
 

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