BindingCompleteEventArgs.BindingCompleteContext Property
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Gets the direction of the binding operation.
public:
property System::Windows::Forms::BindingCompleteContext BindingCompleteContext { System::Windows::Forms::BindingCompleteContext get(); };
public System.Windows.Forms.BindingCompleteContext BindingCompleteContext { get; }
member this.BindingCompleteContext : System.Windows.Forms.BindingCompleteContext
Public ReadOnly Property BindingCompleteContext As BindingCompleteContext
One of the BindingCompleteContext values.
The following code example demonstrates how to handle the BindingComplete event and use the BindingCompleteEventArgs to ensure multiple controls bound to the same data source remain synchronized when one of the control values is changed. To run this example, paste the code into a Windows Form and call the InitializeControlsAndData
method from the form's constructor or Load event-handling method.
private void InitializeControlsAndData()
{
// Initialize the controls and set location, size and
// other basic properties.
this.dataGridView1 = new DataGridView();
this.textBox1 = new TextBox();
this.textBox2 = new TextBox();
this.dataGridView1.ColumnHeadersHeightSizeMode =
DataGridViewColumnHeadersHeightSizeMode.AutoSize;
this.dataGridView1.Dock = DockStyle.Top;
this.dataGridView1.Location = new Point(0, 0);
this.dataGridView1.Size = new Size(292, 150);
this.textBox1.Location = new Point(132, 156);
this.textBox1.Size = new Size(100, 20);
this.textBox2.Location = new Point(12, 156);
this.textBox2.Size = new Size(100, 20);
this.ClientSize = new Size(292, 266);
this.Controls.Add(this.textBox2);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.dataGridView1);
// Declare the DataSet and add a table and column.
DataSet set1 = new 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");
// Add the control data bindings.
dataGridView1.DataSource = set1;
dataGridView1.DataMember = "Menu";
textBox1.DataBindings.Add("Text", set1,
"Menu.Beverages", true, DataSourceUpdateMode.OnPropertyChanged);
textBox2.DataBindings.Add("Text", set1,
"Menu.Beverages", true, DataSourceUpdateMode.OnPropertyChanged);
BindingManagerBase bmb = this.BindingContext[set1, "Menu"];
bmb.BindingComplete += new BindingCompleteEventHandler(bmb_BindingComplete);
}
private void bmb_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(); ;
}
Dim WithEvents bmb As BindingManagerBase
Private Sub InitializeControlsAndData()
' Initialize the controls and set location, size and
' other basic properties.
Me.dataGridView1 = New DataGridView()
Me.textBox1 = New TextBox()
Me.textBox2 = New TextBox()
Me.dataGridView1.ColumnHeadersHeightSizeMode = _
DataGridViewColumnHeadersHeightSizeMode.AutoSize
Me.dataGridView1.Dock = DockStyle.Top
Me.dataGridView1.Location = New Point(0, 0)
Me.dataGridView1.Size = New Size(292, 150)
Me.textBox1.Location = New Point(132, 156)
Me.textBox1.Size = New Size(100, 20)
Me.textBox2.Location = New Point(12, 156)
Me.textBox2.Size = New Size(100, 20)
Me.ClientSize = New Size(292, 266)
Me.Controls.Add(Me.textBox2)
Me.Controls.Add(Me.textBox1)
Me.Controls.Add(Me.dataGridView1)
' Declare the DataSet and add a table and column.
Dim set1 As New 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")
' Add the control data bindings.
dataGridView1.DataSource = set1
dataGridView1.DataMember = "Menu"
textBox1.DataBindings.Add("Text", set1, "Menu.Beverages", _
True, DataSourceUpdateMode.OnPropertyChanged)
textBox2.DataBindings.Add("Text", set1, "Menu.Beverages", _
True, DataSourceUpdateMode.OnPropertyChanged)
' Get the BindingManagerBase for this binding.
bmb = Me.BindingContext(set1, "Menu")
End Sub
Private Sub bmb_BindingComplete(ByVal sender As Object, ByVal e As BindingCompleteEventArgs) _
Handles bmb.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
Продукт | Версії |
---|---|
.NET Framework | 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
Windows Desktop | 3.0, 3.1, 5, 6, 7, 8, 9 |
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