DataTable Constructor ()
Initializes a new instance of the DataTable class with no arguments.
Assembly: System.Data (in System.Data.dll)
The constructor sets initial values for all properties of the DataTable object. The following table shows the properties and their default values. When an instance of DataTable is created, the following read/write properties are set to initial values.
Property | Default value |
|---|---|
CaseSensitive | Same as the parent DataSet, if it belongs to one. Otherwise, false. |
DisplayExpression | Empty string ("") |
Locale | Same as the parent DataSet object's CultureInfo (returned by the Locale property); if no parent exists, the default is the current system CultureInfo. |
MinimumCapacity | 50 rows. |
You can change the value for any of these properties through a separate call to the property.
The following example creates a new DataTable with DataColumn and DataRow, and displays it in a DataGridView control.
Private Sub MakeDataTableAndDisplay() ' Create new DataTable. Dim table As New DataTable ' Declare DataColumn and DataRow variables. Dim column As DataColumn Dim row As DataRow ' Create new DataColumn, set DataType, ColumnName ' and add to DataTable. column = New DataColumn column.DataType = System.Type.GetType("System.Int32") column.ColumnName = "id" table.Columns.Add(column) ' Create second column. column = New DataColumn column.DataType = Type.GetType("System.String") column.ColumnName = "item" table.Columns.Add(column) ' Create new DataRow objects and add to DataTable. Dim i As Integer For i = 0 To 10 row = table.NewRow row("id") = i row("item") = "item " & i table.Rows.Add(row) Next i ' Set to DataGrid.DataSource property to the table. DataGrid1.DataSource = table End Sub
Available since 1.1