DataRow.RowState 属性
定义
重要
一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。 对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。
获取与该行和 DataRowCollection 的关系相关的当前状态。
public:
property System::Data::DataRowState RowState { System::Data::DataRowState get(); };public System.Data.DataRowState RowState { get; }member this.RowState : System.Data.DataRowStatePublic ReadOnly Property RowState As DataRowState属性值
DataRowState 值之一。
示例
以下示例首先创建一个包含一列的新 DataTable ，然后创建单个 DataRow。 DataRow创建、添加、修改和删除 时，将打印其 RowState 。
private void DemonstrateRowState()
{
// Run a function to create a DataTable with one column.
DataTable table = MakeTable();
DataRow row;
// Create a new DataRow.
row = table.NewRow();
// Detached row.
Console.WriteLine("New Row " + row.RowState);
table.Rows.Add(row);
// New row.
Console.WriteLine("AddRow " + row.RowState);
table.AcceptChanges();
// Unchanged row.
Console.WriteLine("AcceptChanges " + row.RowState);
row["FirstName"] = "Scott";
// Modified row.
Console.WriteLine("Modified " + row.RowState);
row.Delete();
// Deleted row.
Console.WriteLine("Deleted " + row.RowState);
}
private DataTable MakeTable()
{
// Make a simple table with one column.
DataTable table = new DataTable("table");
DataColumn dcFirstName = new DataColumn(
"FirstName", Type.GetType("System.String"));
table.Columns.Add(dcFirstName);
return table;
}
Private Sub DemonstrateRowState()
' Run a function to create a DataTable with one column.
Dim table As DataTable = MakeTable()
Dim row As DataRow
' Create a new DataRow.
row = table.NewRow()
' Detached row.
Console.WriteLine("New Row " & row.RowState)
table.Rows.Add(row)
' New row.
Console.WriteLine("AddRow " & row.RowState)
table.AcceptChanges()
' Unchanged row.
Console.WriteLine("AcceptChanges " & row.RowState)
row("FirstName") = "Scott"
' Modified row.
Console.WriteLine("Modified " & row.RowState)
row.Delete()
' Deleted row.
Console.WriteLine("Deleted " & row.RowState)
End Sub
Private Function MakeTable() As DataTable
' Make a simple table with one column.
Dim table As New DataTable("table")
Dim dcFirstName As New DataColumn( _
"FirstName", Type.GetType("System.String"))
table.Columns.Add(dcFirstName)
MakeTable = table
End Function
注解
的值 RowState 取决于两个因素：对行执行的操作类型，以及是否已 AcceptChanges 对 DataRow调用。
