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Binding to DataTable

RadTabStrip can be bound to DataSet, DataTable, and DataView. The tab strip hierarchy can be established with anID->ParentID relation.

Creating the data table in code

The following example illustrates how to bind to a DataTable that is created in code. The same type of logic can easily be applied to a DataView instead:

  1. Create a function that dynamically creates the data source (in this case, a DataTable):
Typrivate DataTable CreateTestTable()
{
    DataTable table = new DataTable();
    table.Columns.Add( "ID");
    table.Columns.Add( "ParentID");
    table.Columns.Add( "Text");
    table.Columns.Add( "URL");
    table.Columns.Add( "Tooltip");
    table.Rows.Add(new string[] { "1", null, "root 1", "root1.aspx", "root 1 tooltip" });
    table.Rows.Add(new string[] { "2", null, "root 2", "root2.aspx", "root 1 tooltip" });
    table.Rows.Add(new string[] { "3", "1", "child 1.1", "child11.aspx" , "child 1.1 tooltip" });
    table.Rows.Add(new string[] { "4", "1", "child 1.2", "child12.aspx" , "child 1.2 tooltip" });
    table.Rows.Add(new string[] { "5", "1", "child 1.3", "child13.aspx" , "child 1.3 tooltip" });
    table.Rows.Add(new string[] { "6", "5", "child 1.3.1", "child131.aspx" , "child 1.3.1 tooltip" });
    table.Rows.Add(new string[] { "7", "5", "child 1.3.2", "child132.aspx" , "child 1.3.2 tooltip" });
    table.Rows.Add(new string[] { "8", "5", "child 1.3.3", "child133.aspx" , "child 1.3.3 tooltip" });
    return table;
}               
Private Function CreateTestTable() As DataTable
  Dim table As New DataTable()
  table.Columns.Add("ID")
  table.Columns.Add("ParentID")
  table.Columns.Add("Text")
  table.Columns.Add("URL")
  table.Columns.Add("Tooltip")
  table.Rows.Add(New String() {"1", Nothing, "root 1", "root1.aspx", "root 1 tooltip"})
  table.Rows.Add(New String() {"2", Nothing, "root 2", "root2.aspx", "root 1 tooltip"})
  table.Rows.Add(New String() {"3", "1", "child 1.1", "child11.aspx", "child 1.1 tooltip"})
  table.Rows.Add(New String() {"4", "1", "child 1.2", "child12.aspx", "child 1.2 tooltip"})
  table.Rows.Add(New String() {"5", "1", "child 1.3", "child13.aspx", "child 1.3 tooltip"})
  table.Rows.Add(New String() {"6", "5", "child 1.3.1", "child131.aspx", "child 1.3.1 tooltip"})
  table.Rows.Add(New String() {"7", "5", "child 1.3.2", "child132.aspx", "child 1.3.2 tooltip"})
  table.Rows.Add(New String() {"8", "5", "child 1.3.3", "child133.aspx", "child 1.3.3 tooltip"})
  Return table
End Function    
  1. Set the DataSource property of the tab strip to the DataTable. At the same time, use the RadTabStrip properties to specify the fields to use for the Text, Value, and NavigateUrl properties of tabs. Indicate how to establish the item hierarchy by giving values to the DataFieldID and DataFieldParentID properties. Finally, call the DataBind method to bind the tab strip:
protected void Page_Load( object sender, EventArgs e)
 {
  if (!IsPostBack) {
    RadTabStrip1.DataSource = CreateTestTable();
    //Establish hierarchy:
    RadTabStrip1.DataFieldID = "ID";
    RadTabStrip1.DataFieldParentID = "ParentID";
    //Set Text, Value, and NavigateUrl:
    RadTabStrip1.DataTextField = "Text";
    RadTabStrip1.DataValueField = "ID";
    RadTabStrip1.DataNavigateUrlField = "URL";
    RadTabStrip1.DataBind();
  }
}           
Protected Sub Page_Load(sender As Object, e As EventArgs) _
  Handles Me.Load
  If Not IsPostBack Then
    RadTabStrip1.DataSource = CreateTestTable()
    'Establish hierarchy:
    RadTabStrip1.DataFieldID = "ID"
    RadTabStrip1.DataFieldParentID = "ParentID"
    'Set Text, Value, and NavigateUrl:
    RadTabStrip1.DataTextField = "Text"
    RadTabStrip1.DataValueField = "ID"
    RadTabStrip1.DataNavigateUrlField = "URL"
    RadTabStrip1.DataBind()
  End If
End Sub     
  1. Create an TabDataBound event handler to set additional properties on the tabs:
void RadTabStrip1_TabDataBound( object sender, RadTabStripEventArgs e)
{
    e.Tab.ToolTip = "Read more about" + (string)DataBinder.Eval(e.Tab.DataItem, "Text");     
}               
Private Sub RadTabStrip1_TabDataBound(ByVal sender As Object, ByVal e As RadTabStripEventArgs) Handles RadTabStrip1.TabDataBound
    e.Tab.ToolTip = "Read more about" + DirectCast(DataBinder.Eval(e.Tab.DataItem, "Text"), String)
End Sub     

Fetching the data from a separate database

You can use a DataSet when the data comes from a separate database. Just use a data adapter component to assign the data from the database to a DataSet:

note

When binding to a DataSet component, you can set the DataMember property to identify the DataTable within the DataSet to which the tab strip should be bound.

protected void Page_Load(object sender, EventArgs e)
{
  if (!Page.IsPostBack)
  {
    OleDbDataAdapter adapter = new OleDbDataAdapter("SELECT * FROM Table1",
                          "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="
                          + Server.MapPath("~/App_Data/db1.mdb" ));
    DataSet links = new DataSet();
    adapter.Fill(links);
    RadTabStrip1.DataSource = links;
    RadTabStrip1.DataFieldID = "ID";
    RadTabStrip1.DataFieldParentID = "ParentID";
    RadTabStrip1.DataTextField = "Text";
    RadTabStrip1.DataNavigateUrlField = "URL";
    RadTabStrip1.DataBind();
  }
}               
Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
  If Not Page.IsPostBack Then
    Dim adapter As New OleDbDataAdapter("SELECT * FROM Table1", _
                 "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" _
                + Server.MapPath("~/App_Data/db1.mdb"))
    Dim links As New DataSet()
    adapter.Fill(links)
    RadTabStrip1.DataSource = links
    RadTabStrip1.DataFieldID = "ID"
    RadTabStrip1.DataFieldParentID = "ParentID"
    RadTabStrip1.DataTextField = "Text"
    RadTabStrip1.DataNavigateUrlField = "URL"
    RadTabStrip1.DataBind()
  End If
End Sub     
caution

The ParentID of the root tabs must be null ( nothing ). If for some reason the data source comes without null values for the ParentID column, you must either fix the data by writing code to modify ParentID values in the DataTable , or use a query that returns the expected value (null). For example:
SELECT ID, Text, IF(ParentID = 0, NULL, ParentID) FROM tblData

See Also