DataTable.NewRow 方法

.NET Framework 类库

DataTable.NewRow 方法

创建与该表具有相同架构的新 DataRow。[Visual Basic]
Public Function NewRow() As
[C#]
public NewRow();
[C++]
public: * NewRow();
[JScript]
public function NewRow() : ;

返回值

DataRow，其架构与 DataTable 的架构相同。

备注

必须使用 NewRow 方法才能创建与 DataTable 具有相同架构的新 DataRow 对象。在创建 DataRow 之后，可以通过 DataTable 对象的 Rows 属性将其添加到 DataRowCollection 中。

示例

[Visual Basic, C#, C++] 以下示例创建一个 DataTable、添加两个用于确定表的架构的 DataColumn 对象、使用 NewRow 方法创建几个新的 DataRow 对象。然后使用 Add 方法将这些 DataRow 对象添加到 DataRowCollection 中。[Visual Basic]
Private Sub MakeDataTableAndDisplay()
' Create new DataTable and DataSource objects.
Dim myDataTable As DataTable = New DataTable()
' Declare DataColumn and DataRow variables.
Dim myColumn As DataColumn
Dim myRow As DataRow
Dim myDataView As DataView
' Create new DataColumn, set DataType, ColumnName and add to DataTable.
myColumn = New DataColumn()
myColumn.DataType = System.Type.GetType("System.Int32")
myColumn.ColumnName = "id"
myDataTable.Columns.Add(myColumn)

' Create second column.
myColumn = New DataColumn()
myColumn.DataType = Type.GetType("System.String")
myColumn.ColumnName = "item"
myDataTable.Columns.Add(myColumn)

' Create new DataRow objects and add to DataTable.
Dim i As Integer
For i = 0 to 9
myRow = myDataTable.NewRow()
myRow("id") = i
myRow("item") = "item " & i
myDataTable.Rows.Add(myRow)
Next
' Create a DataView using the DataTable.
myDataView = New DataView(myDataTable)
' Set a DataGrid control's DataSource to the DataView.
DataGrid1.DataSource = myDataView
End Sub

[C#]
private void MakeDataTableAndDisplay(){
// Create new DataTable and DataSource objects.
DataTable myDataTable = new DataTable();
// Declare DataColumn and DataRow variables.
DataColumn myColumn;
DataRow myRow;
DataView myDataView;
// Create new DataColumn, set DataType, ColumnName and add to DataTable.
myColumn = new DataColumn();
myColumn.DataType = System.Type.GetType("System.Int32");
myColumn.ColumnName = "id";
myDataTable.Columns.Add(myColumn);

// Create second column.
myColumn = new DataColumn();
myColumn.DataType = Type.GetType("System.String");
myColumn.ColumnName = "item";
myDataTable.Columns.Add(myColumn);

// Create new DataRow objects and add to DataTable.
for(int i = 0; i < 10; i++){
myRow = myDataTable.NewRow();
myRow["id"] = i;
myRow["item"] = "item " + i.ToString();
myDataTable.Rows.Add(myRow);
}

// Create a DataView using the DataTable.
myDataView = new DataView(myDataTable);
// Set a DataGrid control's DataSource to the DataView.
dataGrid1.DataSource = myDataView;
}

[C++]
private:
void MakeDataTableAndDisplay(){
// Create new DataTable and DataSource objects.
DataTable* myDataTable = new DataTable();
// Declare DataColumn and DataRow variables.
DataColumn* myColumn;
DataRow* myRow;
DataView* myDataView;
// Create new DataColumn, set DataType, ColumnName and add to DataTable.
myColumn = new DataColumn();
myColumn->DataType = System::Type::GetType(S"System.Int32");
myColumn->ColumnName = S"id";
myDataTable->Columns->Add(myColumn);

// Create second column.
myColumn = new DataColumn();
myColumn->DataType = Type::GetType(S"System.String");
myColumn->ColumnName = S"item";
myDataTable->Columns->Add(myColumn);

// Create new DataRow objects and add to DataTable.
for(int i = 0; i < 10; i++){
myRow = myDataTable->NewRow();
myRow->Item[S"id"] = __box(i);
myRow->Item[S"item"] = String::Format( S"item {0}", __box(i));
myDataTable->Rows->Add(myRow);
}

// Create a DataView using the DataTable.
myDataView = new DataView(myDataTable);
// Set a DataGrid control's DataSource to the DataView.
dataGrid1->DataSource = myDataView;
}
[JScript] 没有可用于 JScript 的示例。若要查看 Visual Basic、C# 或 C++ 示例，请单击页左上角的“语言筛选器”按钮

。

要求

平台: [/b]Windows 98, Windows NT 4.0, Windows ME, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 系列, .NET Framework 精简版

请参见

DataTable 类 | DataTable 成员 | System.Data 命名空间 | AcceptChanges | Add | DataColumnCollection | DataColumn | DataRowCollection