Odd Problem - Datagrid

lorena · December 7, 2005

I have two identical pages that list out the contents of two different folders with hyperlinks to each file. One works, the other doesn't. On the one that doesn't I get this error:

"Control 'dgFiles__ctl24__ctl1' of type 'DataGridLinkButton' must be placed inside a form tag with runat=server"

There are 29 files in the folder with the page that doesn't work. If I set the page size to "20" I get the error above, if I set it to "15" I get the same error but the Control is 'dgFiles__ctl19__ctl1'. If I set the page size to "30" (one more than the number of files in the folder) - it works.

The other folder with the same type of page has hundreds of files in it and the paged datagrid works fine. I don't get it.

Here is all of my code:

<%@ Import Namespace = "System.Web" %>
<%@ Import Namespace = "System.Data" %>
<%@ Import Namespace="System.IO" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
	<title>Opportunities for Improvement - Closed</title>
	<meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
	<script language="VB" runat="server">
		Sub Page_Load(sender as Object, e as EventArgs)
			If Not Page.IsPostBack then				
				BindData
			End If
		End Sub				
		
		Sub dgFiles_Paging(ByVal s As Object, ByVal e As DataGridPageChangedEventArgs)
			dgFiles.CurrentPageIndex = e.NewPageIndex
			BindData()
		End Sub
		
		Sub BindData()
			Dim dirInfo as New DirectoryInfo(Server.MapPath("/p1/Quality/Corr_Prev_Action_Cases/Opportunities for Improvement/Testing"))					
			Dim arrFileInfo  As Array
			Dim filesInfo   As FileInfo

			Dim filesTable   As New DataTable
			Dim drFiles    As DataRow
			Dim dvFiles   As DataView
			filesTable.Columns.Add("Name", Type.GetType("System.String"))
			filesTable.Columns.Add("LastWriteTime", Type.GetType("System.DateTime"))
	
			' Get File Info
			arrFileInfo = dirInfo.GetFiles("*.pdf")

			For Each filesInfo In arrFileInfo
				drFiles = filesTable.NewRow()
				drFiles("Name")          = filesInfo.Name
				drFiles("LastWriteTime") = filesInfo.LastWriteTime					
				filesTable.Rows.Add(drFiles)
			Next filesInfo
			
			dvFiles = filesTable.DefaultView
			dvFiles.Sort = "LastWriteTime DESC"
			
			dgFiles.DataSource = dvFiles
			dgFiles.DataBind()
		End Sub
	</script>
	<link href="http://intranet.talleyds.com/sklog/styles/tocDOC.css" type="text/css" rel="stylesheet">
</HEAD>
<body MS_POSITIONING="GridLayout">
	<%
		Response.WriteFile ("../includes/qHeader.asp")		
	%>
	<p><a class="subDept" href="http://intranet.talleyds.com/viper/quality/ca/ca.asp">CORRECTIVE 
			AND PREVENTATIVE ACTION</a></p>
	<FORM>
		<asp:datagrid id="dgFiles" style="Z-INDEX: 101; LEFT: 20px; POSITION: absolute; TOP: 120px" 
		runat="server" CellPadding="5" CellSpacing="3" AutoGenerateColumns="False" ShowHeader="True" 
		Width="293px" AllowPaging="True" PageSize="40" OnPageIndexChanged="dgFiles_Paging">
			<ItemStyle Font-Size="XX-Small" Font-Names="Verdana" Font-Bold="True" ForeColor="#336699" BackColor="White"></ItemStyle>
			<HeaderStyle Font-Size="XX-Small" Font-Names="Verdana" Font-Bold="True" ForeColor="#660033" CssClass="TH"></HeaderStyle>
			<Columns>
				<asp:HyperLinkColumn DataNavigateUrlField="Name" target="_blank"
				DataNavigateUrlFormatString="http://intranet.talleyds.com/p1/Quality/Corr_Prev_Action_Cases/Opportunities for Improvement/Testing/{0}" 
				DataTextField="Name" HeaderText="Opportunities for Improvement - Testing"></asp:HyperLinkColumn>
				<asp:BoundColumn DataField="LastWriteTime" SortExpression="Date" Visible="False" HeaderText="File Last Modified" DataFormatString="{0:d}" />
			</Columns>
		</asp:datagrid>
	</FORM>
</body>
</HTML>

bri189a · December 8, 2005

I don't see anything glaring other than you aren't accepting the changes on your dataset or disposing your resoruces, but nothing that glares at me as something that would cause the problem. Maybe try accepting changes at the end of your custom Fill method you wrote... also trying doing an indexed loop instead of a for each and see if that is causing some sort or reference issue - shouldn't be, but I've seen stranger.

lorena · December 8, 2005

Thanks for this. I am not sure what you mean by "accepting the changes" to the dataset. How do I do that?

bri189a · December 8, 2005

filesTable.AcceptChanges()

lorena · December 8, 2005

Thanks! That was something (one of many things, I'm sure) that I didn't know.

bri189a · December 9, 2005

Well hopefully it will help in your problem.

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