如何同步處理系結至相同資料來源的多個控制項 - Windows Forms .NET

使用 BindingSource 系結控制項的範例

下列程式碼範例示範如何使用元件，將三個控制項、兩個 DataGridView 文字方塊控制項和控制項系結至中的 DataSet BindingSource 相同資料行。此範例示範如何處理 BindingComplete 事件。它可確保當一個文字方塊的文字值變更時，另一個文字方塊和 DataGridView 控制項會以正確的值更新。

此範例使用 BindingSource 來系結資料來源和控制項。或者，您可以將控制項直接系結至資料來源，並從表單的 BindingContext 中擷取 BindingManagerBase 系結的，然後處理 BindingComplete 的 BindingManagerBase 事件。如需系結資料來源和控制項的詳細資訊，請參閱有關事件 BindingManagerBase 的說明頁面 BindingComplete 。


    public Form1() 
    InitializeComponent();
    set1.Tables.Add("Menu");
    set1.Tables[0].Columns.Add("Beverages");
    // Add some rows to the table.
    set1.Tables[0].Rows.Add("coffee");
    set1.Tables[0].Rows.Add("tea");
    set1.Tables[0].Rows.Add("hot chocolate");
    set1.Tables[0].Rows.Add("milk");
    set1.Tables[0].Rows.Add("orange juice");
    // Set the data source to the DataSet.
    bindingSource1.DataSource = set1;
    //Set the DataMember to the Menu table.
    bindingSource1.DataMember = "Menu";
    // Add the control data bindings.
    dataGridView1.DataSource = bindingSource1;
    textBox1.DataBindings.Add("Text", bindingSource1,
        "Beverages", true, DataSourceUpdateMode.OnPropertyChanged);
    textBox2.DataBindings.Add("Text", bindingSource1,
        "Beverages", true, DataSourceUpdateMode.OnPropertyChanged);
    bindingSource1.BindingComplete +=
        new BindingCompleteEventHandler(bindingSource1_BindingComplete);
void bindingSource1_BindingComplete(object sender, BindingCompleteEventArgs e)
    // Check if the data source has been updated, and that no error has occurred.
    if (e.BindingCompleteContext ==
        BindingCompleteContext.DataSourceUpdate && e.Exception == null)
        // If not, end the current edit.
        e.Binding.BindingManagerBase.EndCurrentEdit();
    
     Public Class Form1
    Private Sub InitializeControlsAndDataSource()
        ' Add a table and column to DataSet.
        set1.Tables.Add("Menu")
        set1.Tables(0).Columns.Add("Beverages")
        ' Add some rows to the table.
        set1.Tables(0).Rows.Add("coffee")
        set1.Tables(0).Rows.Add("tea")
        set1.Tables(0).Rows.Add("hot chocolate")
        set1.Tables(0).Rows.Add("milk")
        set1.Tables(0).Rows.Add("orange juice")
        ' Set the data source to the DataSet.
        BindingSource1.DataSource = set1
        'Set the DataMember to the Menu table.
        BindingSource1.DataMember = "Menu"
        ' Add the control data bindings.
        DataGridView1.DataSource = BindingSource1
        TextBox1.DataBindings.Add("Text", BindingSource1, "Beverages",
            True, DataSourceUpdateMode.OnPropertyChanged)
        TextBox2.DataBindings.Add("Text", BindingSource1, "Beverages",
            True, DataSourceUpdateMode.OnPropertyChanged)
    End Sub
    Private Sub BindingSource1_BindingComplete(ByVal sender As Object,
        ByVal e As BindingCompleteEventArgs) Handles BindingSource1.BindingComplete
        ' Check if the data source has been updated, and that no error has occurred.
        If e.BindingCompleteContext = BindingCompleteContext.DataSourceUpdate _
            AndAlso e.Exception Is Nothing Then
            ' If not, end the current edit.
            e.Binding.BindingManagerBase.EndCurrentEdit()
        End If
    End Sub
    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        InitializeControlsAndDataSource()
    End Sub
End Class


    
     
      使用變更通知設計絕佳的資料來源


   
    
     
      作法：使用 BindingSource 元件跨表單共用繫結資料