StackOverflow2013

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13419206
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2012-11-16T15:06:12.680
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2012-11-16T15:12:06.580
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2012-11-16T15:12:06.580
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13418898
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text
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<blockquote> Notice I didn't have to open and close the connection. </blockquote> No, but the <code>DataAdapter</code> does it implicitely. <a href="http://msdn.microsoft.com/en-us/library/zxkb3c3d.aspx" rel="nofollow">MSDN</a>: <blockquote> If the IDbConnection is closed before Fill is called, it is opened to retrieve data and then closed. If the connection is open before Fill is called, it remains open. </blockquote> But also note that opening and closing is not inefficient when you're using <a href="http://msdn.microsoft.com/en-us/library/8xx3tyca.aspx" rel="nofollow"><code>Connection-Pooling</code></a>(default). Because then <code>con.Open</code> just means "wait, i need this connection now" and <code>con.Close</code> means "ok, you can reuse it somewhere else now, i'm finished". So you should always close a connection as soon as you're finished with it. Otherwise the connection-pool needs to open new physical connections everytime which can cause exceptions(maximum default connection count is 100) but always will decrease the performance. The best way to dispose/close connections(any <code>IDisposable</code>) is by using the <a href="http://msdn.microsoft.com/en-us/library/yh598w02.aspx" rel="nofollow"><code>using</code> statement</a>: <pre><code>using(var con = new SqlConnection(ConfigurationManager.ConnectionStrings["PhoQL"].ConnectionString)) using(var cmd = new SqlCommand("SELECT [Abrv], [State] FROM [States]", con)) using(var da = new SqlDataAdapter(cmd)) { DataTable tbl = new DataTable(); da.Fill(tbl); ddlShipState.DataSource = tbl; ddlShipState.DataTextField = "State"; ddlShipState.DataValueField = "Abrv"; ddlShipState.DataBind(); } </code></pre> (sidenote: i've replaced your <code>DataSet</code> with a "lighter" <code>DataTable</code>)
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1. POpopulating dropdownlist
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1. USTim Schmelter
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1. USTim Schmelter
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1. POpopulating dropdownlist
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1. COHello Tim, can you help me with the following http://stackoverflow.com/questions/13587474/asp-net-dropdownlist-getting-selectedvalue
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Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.