DataRowView.Item[] 属性

定义

命名空间:

System.Data

程序集:

System.Data.Common.dll

获取或设置指定列中的值。

重载

Item[Int32]	获取或设置指定列中的值。
Item[String]	获取或设置指定列中的值。

Item[Int32]

Source:

DataRowView.cs

获取或设置指定列中的值。

public:
 property System::Object ^ default[int] { System::Object ^ get(int ndx); void set(int ndx, System::Object ^ value); };

public object this[int ndx] { get; set; }

member this.Item(int) : obj with get, set

Default Public Property Item(ndx As Integer) As Object

参数

ndx

Int32

列索引。

属性值

Object

列的值。

例外

DataException

DataView 不允许编辑，DataRowView 不是新项。

IndexOutOfRangeException

任何列都不与该索引值相对应。

示例

以下示例显示 中每个项DataRowViewDataView中的值。

private static void WriteViewRows(DataView view)
{
    int colCount = view.Table.Columns.Count;

    // Iterate through the rows of the DataView.
    foreach (DataRowView rowView in view)
    {
        // Display the value in each item of the DataRowView
        for (int i = 0; i < colCount; i++)
            Console.Write(rowView[i] + "\table");
        Console.WriteLine();
    }
}

Private Shared Sub WriteViewRows(view As DataView)
   Dim colCount As Integer = view.Table.Columns.Count

   ' Iterate through the rows of the DataView.
   For Each rowView As DataRowView In view
     ' Display the value in each item of the DataRowView
     For i As Integer = 0 To colCount - 1
        Console.Write(rowView(i) & vbTab)
     Next
     Console.WriteLine()
   Next
End Sub

Item[String]

Source:

DataRowView.cs

获取或设置指定列中的值。

public:
 property System::Object ^ default[System::String ^] { System::Object ^ get(System::String ^ property); void set(System::String ^ property, System::Object ^ value); };

public object this[string property] { get; set; }

member this.Item(string) : obj with get, set

Default Public Property Item(property As String) As Object

参数

property

String

包含指定列的字符串。

属性值

Object

列的值。

例外

ArgumentException

找不到具有指定名称或关系的列。

- 或 -

DataView 不允许编辑，DataRowView 不是新项。

DataException

设置值时，property 不匹配。

示例

以下示例将文本追加到 的每个修改行 DataView中的列的值。

private void SetDataRowView()
{
    DataView view = (DataView) dataGrid1.DataSource;

    // Set the filter to display only those rows that were modified.
    view.RowStateFilter=DataViewRowState.ModifiedCurrent;

    // Change the value of the CompanyName column for each modified row.
    foreach(DataRowView rowView in view)
    {
        rowView["CompanyName"] += " new value";
    }
}

Private Sub SetDataRowView()
     Dim view As DataView = CType(dataGrid1.DataSource, DataView)

     ' Set the filter to display only those rows that were modified.
     view.RowStateFilter = DataViewRowState.ModifiedCurrent

     ' Change the value of the CompanyName column for each modified row.
     Dim rowView As DataRowView
     For Each rowView In  view
         rowView.Item("CompanyName") = _
         rowView.Item("CompanyName").ToString() & " new value"
     Next rowView
End Sub