BindingSource.List 属性

public:
 property System::Collections::IList ^ List { System::Collections::IList ^ get(); };

[System.ComponentModel.Browsable(false)]
public System.Collections.IList List { get; }

[<System.ComponentModel.Browsable(false)>]
member this.List : System.Collections.IList

Public ReadOnly Property List As IList

属性值

一个 IList 表示列表，或者 null 如果没有与此 BindingSource关联的基础列表。

属性

BrowsableAttribute

示例

下面的代码示例演示了List和RemoveAtCount成员。 若要运行此示例，请将代码粘贴到包含BindingSource命名标签、两label1个标签BindingSource1和label2一个名为按钮的button1窗体中。 将button1_Click该方法与Click事件的关联 。button1 Visual Basic 用户需要添加对 System.Data.dll的引用。

private void button1_Click(object sender, EventArgs e)
{
    // Create the connection string, data adapter and data table.
    SqlConnection connectionString =
         new SqlConnection("Initial Catalog=Northwind;" +
         "Data Source=localhost;Integrated Security=SSPI;");
    SqlDataAdapter customersTableAdapter =
        new SqlDataAdapter("Select * from Customers", connectionString);
    DataTable customerTable = new DataTable();

    // Fill the adapter with the contents of the customer table.
    customersTableAdapter.Fill(customerTable);

    // Set data source for BindingSource1.
    BindingSource1.DataSource = customerTable;

    // Set the label text to the number of items in the collection before
    // an item is removed.
    label1.Text = "Starting count: " + BindingSource1.Count.ToString();

    // Access the List property and remove an item.
    BindingSource1.List.RemoveAt(4);

    // Remove an item directly from the BindingSource. 
    // This is equivalent to the previous line of code.
    BindingSource1.RemoveAt(4);

    // Show the new count.
    label2.Text = "Count after removal: " + BindingSource1.Count.ToString();
}

    Private Sub button1_Click(ByVal sender As Object, ByVal e As EventArgs) _
        Handles button1.Click

        ' Create the connection string, data adapter and data table.
        Dim connectionString As New SqlConnection("Initial Catalog=Northwind;" & _
            "Data Source=localhost;Integrated Security=SSPI;")
        Dim customersTableAdapter As New SqlDataAdapter("Select * from Customers", _
            connectionString)
        Dim customerTable As New DataTable()

        ' Fill the adapter with the contents of the customer table.
        customersTableAdapter.Fill(customerTable)

        ' Set data source for BindingSource1.
        BindingSource1.DataSource = customerTable

        ' Set the label text to the number of items in the collection before
        ' an item is removed.
        label1.Text = "Starting count: " + BindingSource1.Count.ToString()

        ' Access the List property and remove an item.
        BindingSource1.List.RemoveAt(4)

        ' Remove an item directly from the BindingSource. 
        ' This is equivalent to the previous line of code.
        BindingSource1.RemoveAt(4)

        ' Show the new count.
        label2.Text = "Count after removal: " + BindingSource1.Count.ToString()

    End Sub
End Class

注解

该 BindingSource 类统一处理不同的数据源。 理想情况下，属性 List 应设置为常规 IList属性。 但是，有时可能需要将此属性强制转换为更具体的类型。 下表显示了基础列表类型，具体取决于数据源的类型或值。

如果检索的类型是 IList 接口，则基础集合可能更为复杂，例如 ArrayList 或 DataView 类。

另请参阅

• IList
• Item[Int32]