DataTable.NewRow 方法

定义

命名空间:

System.Data

程序集:

System.Data.Common.dll

Source:

DataTable.cs

创建与该表具有相同架构的新 DataRow。

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

与 DataTable 具有相同架构的 DataRow。

示例

以下示例创建 ，添加两DataColumn个DataTable确定表架构的 对象，并使用 方法创建几个新DataRow对象NewRow。 DataRow然后使用 方法将这些对象添加到 。DataRowCollectionAdd

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

必须使用 NewRow 方法创建架构与 相同的DataTable新 DataRow 对象。 创建 DataRow后，可以通过 对象的 Rows 属性将其添加到 DataRowCollection。DataTable 使用 NewRow 创建新行时，必须在调用 Clear之前在数据表中添加或删除行。

另请参阅

• DataTables
• 处理数据表事件