How to make an ASP.NET Table row highlight and become clickable

4.7 (10 votes)

For those people who like to output their data to an asp:Table, highlighting the entire row and making it clickable can make it obvious to the user that some action is expected from them. This emulates the behaviour that can be found in some desktop applications. All that's needed for this is a bit of javascript, and the use of AddAttributes() for the table rows.

You will also need to get round the limitation of the fact that the <a> tag is not allowed around a table row, so here are the two javascript functions that perform the magic:

    
function highlight(tableRow, active)
{
if (active)
{
tableRow.style.backgroundColor = '#cfc';
}
else
{
tableRow.style.backgroundColor = '#fff';
}
}

function link(Url)
{
document.location.href = Url;
}

And here's the method that adds the javascript to each row of the table as it is rendered:

string connstring = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=";
connstring += Server.MapPath("App_Data/NWind.mdb");
string query = "SELECT [CustomerID], [CompanyName], [ContactName], [Address], [City]";
query += " FROM [Customers]";
OleDbConnection conn = new OleDbConnection(connstring);
OleDbDataAdapter da = new OleDbDataAdapter(query, conn);
DataSet ds = new DataSet();
da.Fill(ds, "Employees");
foreach (DataRow dr in ds.Tables[0].Rows)
  {
    TableRow trow = new TableRow();
    foreach (DataColumn dc in ds.Tables[0].Columns)
    {
      TableCell tcell = new TableCell();
      tcell.Controls.Add(new LiteralControl(dr[dc.ColumnName].ToString()));
      trow.Cells.Add(tcell);
  
      trow.Attributes["onmouseover"] = "highlight(this, true);";
      trow.Attributes["onmouseout"] = "highlight(this, false);";
      trow.Attributes["onclick"] = "link('edit.aspx?id=" + dr[0].ToString() + "');";
      HttpResponse myHttpResponse = Response;
      HtmlTextWriter myHtmlTextWriter = new HtmlTextWriter(myHttpResponse.Output);
      trow.Attributes.AddAttributes(myHtmlTextWriter);
      Table1.Rows.Add(trow); 
    }
  }
conn.Close();

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