Databases
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    <p>Instead of adding a new row every time try using DataTable.Select or DataTable.Rows.Find to check for a duplicate. If there is no duplicate add a new new row, if it already exists just update the other columns. </p> <p>Also you're setting the DataSource on every iteration of the loop, you only need to do this once.</p> <p>Here is a simple incomplete example that updates the grid every second, you should be able to adapt the logic here for your program.</p> <pre><code> public partial class Form1 : Form { private readonly DataGridView _gridView; private readonly DataTable _dataTable; public Form1() { InitializeComponent(); _dataTable = new DataTable(); DataColumn computerColumn = new DataColumn("Name"); _dataTable.Columns.Add(computerColumn); _dataTable.Columns.Add(new DataColumn("IP")); _dataTable.Columns.Add(new DataColumn("MAC")); _dataTable.Columns.Add(new DataColumn("Descubierto")); _dataTable.PrimaryKey = new [] { computerColumn }; _gridView = new DataGridView { Dock = DockStyle.Fill, DataSource = _dataTable }; Controls.Add(_gridView); System.Windows.Forms.Timer timer = new System.Windows.Forms.Timer(); timer.Interval = 1000; timer.Tick += TimerTick; timer.Start(); } void TimerTick(object sender, EventArgs e) { DirectoryEntry domainEntry = new DirectoryEntry("WinNT://mydomain"); domainEntry.Children.SchemaFilter.Add("Computer"); _dataTable.BeginLoadData(); foreach (DirectoryEntry machine in domainEntry.Children) { DataRow row = _dataTable.Rows.Find(machine.Name); if(row == null) { row = _dataTable.NewRow(); row[0] = machine.Name; _dataTable.Rows.Add(row); } row[3] = DateTime.Now.ToString(); } _dataTable.EndLoadData(); } } </code></pre>
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    1. PODatagridview, Only show unique values were Duplicate Cell Values C# 2005
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    1. USGary
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    1. COPerfect, good advise, im not a programmer and this is part of my thesis.... im building an remote ad managemet robot for an domain admin
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      1. USLuis Nuesi Tejada
    2. COthen you might want to buy a good book or find a good tutorial on internet. Gary had a good answer and you posted again [here](http://stackoverflow.com/questions/8717898/datagridview-find-duplicate-rows-and-update-existing-data/8721553#8721553)
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      1. USGabriel GM
 

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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.

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