DataRowView.Item[] 属性

定义

命名空间:
System.Data
程序集:
netstandard.dll, System.Data.Common.dll
程序集:
System.Data.Common.dll
程序集:
System.Data.dll
程序集:
netstandard.dll

获取或设置指定列中的值。

重载

名称 说明
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
Source:
DataRowView.cs
Source:
DataRowView.cs
Source:
DataRowView.cs
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并且不是新的。

IndexOutOfRangeException

没有列对应于该索引值。

示例

以下示例显示每个项 DataRowView 中的 DataView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

适用于

Item[String]

Source:
DataRowView.cs
Source:
DataRowView.cs
Source:
DataRowView.cs
Source:
DataRowView.cs
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并且不是新的。

DataException

property设置值时不匹配。

示例

以下示例将文本追加到每个修改行 DataView中列的值。

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

适用于