語言

DataRowView.Item[] 屬性

定義

命名空間:
System.Data
組件:
netstandard.dll, System.Data.Common.dll
組件:
System.Data.Common.dll
組件:
System.Data.dll
組件:
netstandard.dll

在指定欄位取得或設定一個值。

多載

名稱 Description
Item[Int32]

在指定欄位取得或設定一個值。
Item[String]

在指定欄位取得或設定一個值。

Item[Int32]

來源:
DataRowView.cs
來源:
DataRowView.cs
來源:
DataRowView.cs
來源:
DataRowView.cs
來源:
DataRowView.cs

在指定欄位取得或設定一個值。

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

參數

ndx
Int32

欄位索引。

屬性值

Object

欄位的價值。

例外狀況

DataException

這 DataView 不允許編輯，也 DataRowView 不是新設計。

IndexOutOfRangeException

沒有任何欄位對應該索引值。

範例

以下範例顯示每個項目DataRowViewDataView在 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

適用於

Item[String]

來源:
DataRowView.cs
來源:
DataRowView.cs
來源:
DataRowView.cs
來源:
DataRowView.cs
來源:
DataRowView.cs

在指定欄位取得或設定一個值。

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

參數

property
String

包含指定欄位的字串。

屬性值

Object

欄位的價值。

例外狀況

ArgumentException

未找到指定名稱或關聯的欄位。

-或-

這 DataView 不允許編輯，也 DataRowView 不是新設計。

DataException

設定數值時無 property 人能及。

範例

以下範例將文字附加到該欄位的每個修改後的列 DataView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

適用於