DataTable.NewRow 方法

定义

创建与该表具有相同架构的新 DataRowCreates a new DataRow with the same schema as the table.

public:
 System::Data::DataRow ^ NewRow();
public System.Data.DataRow NewRow ();
member this.NewRow : unit -> System.Data.DataRow
Public Function NewRow () As DataRow

返回

DataRow

DataTable 具有相同架构的 DataRowA DataRow with the same schema as the DataTable.

示例

下面的示例创建了 DataTable ,并添加了两个 DataColumn 对象来确定表的架构,并使用方法创建了多个新的 DataRow 对象 NewRowThe following example creates a DataTable, adds two DataColumn objects that determine the table's schema, and creates several new DataRow objects using the NewRow method. DataRow然后,使用方法将这些对象添加到中 DataRowCollection AddThose DataRow objects are then added to the DataRowCollection using the Add method.

private void MakeDataTableAndDisplay()
{
    // Create new DataTable and DataSource objects.
    DataTable table = new DataTable();

    // Declare DataColumn and DataRow variables.
    DataColumn column;
    DataRow row;
    DataView view;

    // 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.
    for(int i = 0; i < 10; i++)
    {
        row = table.NewRow();
        row["id"] = i;
        row["item"] = "item " + i.ToString();
        table.Rows.Add(row);
    }

    // Create a DataView using the DataTable.
    view = new DataView(table);

    // Set a DataGrid control's DataSource to the DataView.
    dataGrid1.DataSource = view;
}
Private Sub MakeDataTableAndDisplay()
    ' Create new DataTable and DataSource objects.
    Dim table As New DataTable()

    ' Declare DataColumn and DataRow variables.
    Dim column As DataColumn 
    Dim row As DataRow 
    Dim view As DataView 

    ' 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 9 
       row = table.NewRow()
       row("id") = i
       row("item") = "item " & i
       table.Rows.Add(row)
    Next
    ' Create a DataView using the DataTable.
    view = New DataView(table)

    ' Set a DataGrid control's DataSource to the DataView.
    DataGrid1.DataSource = view
End Sub

注解

您必须使用 NewRow 方法来创建新 DataRow 对象,其架构与相同 DataTableYou must use the NewRow method to create new DataRow objects with the same schema as the DataTable. 创建后 DataRow ,可以 DataRowCollection 通过 DataTable 对象的属性将其添加到中 RowsAfter creating a DataRow, you can add it to the DataRowCollection, through the DataTable object's Rows property. 使用 NewRow 创建新行时,必须先在数据表中添加或删除行,然后再调用 ClearWhen you use NewRow to create new rows, the rows must be added to or deleted from the data table before you call Clear.

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