DataGridTableStyle.ColumnHeadersVisibleChanged 事件
定义
重要
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当 ColumnHeadersVisible 值更改时发生。
public:
event EventHandler ^ ColumnHeadersVisibleChanged;public event EventHandler ColumnHeadersVisibleChanged;member this.ColumnHeadersVisibleChanged : EventHandler Public Custom Event ColumnHeadersVisibleChanged As EventHandler 事件类型
示例
下面的代码示例演示了此成员的用法。
private:
void DataGridTableStyle_Sample_Load( Object^ /*sender*/, EventArgs^ /*e*/ )
{
myDataGridTableStyle1 = gcnew DataGridTableStyle;
myHeaderLabel->Text = String::Concat( "Header Status : ", myDataGridTableStyle1->ColumnHeadersVisible );
if ( myDataGridTableStyle1->ColumnHeadersVisible == true )
{
btnheader->Text = "Remove Header";
}
else
{
btnheader->Text = "Add Header";
}
AddCustomDataTableStyle();
}
void AddCustomDataTableStyle()
{
myDataGridTableStyle1->ColumnHeadersVisibleChanged += gcnew System::EventHandler( this, &DataGridTableStyle_Sample::ColumnHeadersVisibleChanged_Handler );
// Set ColumnheaderVisible property.
myDataGridTableStyle1->MappingName = "Customers";
// Add a GridColumnStyle and set its MappingName
DataGridColumnStyle^ myBoolCol = gcnew DataGridBoolColumn;
myBoolCol->MappingName = "Current";
myBoolCol->HeaderText = "IsCurrent Customer";
myBoolCol->Width = 150;
myDataGridTableStyle1->GridColumnStyles->Add( myBoolCol );
// Add a second column style.
DataGridColumnStyle^ myTextCol = gcnew DataGridTextBoxColumn;
myTextCol->MappingName = "custName";
myTextCol->HeaderText = "Customer Name";
myTextCol->Width = 250;
myDataGridTableStyle1->GridColumnStyles->Add( myTextCol );
// Create new ColumnStyle objects
DataGridColumnStyle^ cOrderDate = gcnew DataGridTextBoxColumn;
cOrderDate->MappingName = "OrderDate";
cOrderDate->HeaderText = "Order Date";
cOrderDate->Width = 100;
// PropertyDescriptor to create a formatted column.
PropertyDescriptorCollection^ myPropertyDescriptorCollection =
this->BindingContext[myDataSet, "Customers::custToOrders"]->GetItemProperties();
// Create a formatted column using a PropertyDescriptor.
DataGridColumnStyle^ csOrderAmount =
gcnew DataGridTextBoxColumn( myPropertyDescriptorCollection[ "OrderAmount" ],"c",true );
csOrderAmount->MappingName = "OrderAmount";
csOrderAmount->HeaderText = "Total";
csOrderAmount->Width = 100;
// Add the DataGridTableStyle instances to GridTableStylesCollection.
myDataGrid->TableStyles->Add( myDataGridTableStyle1 );
}
void ColumnHeadersVisibleChanged_Handler( Object^ /*sender*/, EventArgs^ /*e*/ )
{
myHeaderLabel->Text = String::Concat( "Header Status : ", myDataGridTableStyle1->ColumnHeadersVisible );
}
void btnheader_Click( Object^ /*sender*/, EventArgs^ /*e*/ )
{
if ( myDataGridTableStyle1->ColumnHeadersVisible == true )
{
myDataGridTableStyle1->ColumnHeadersVisible = false;
btnheader->Text = "Add Header";
}
else
{
myDataGridTableStyle1->ColumnHeadersVisible = true;
btnheader->Text = "Remove Header";
}
}
private void DataGridTableStyle_Sample_Load(object sender,
EventArgs e)
{
myDataGridTableStyle1 = new DataGridTableStyle();
myHeaderLabel.Text = "Header Status :"
+ myDataGridTableStyle1.ColumnHeadersVisible.ToString();
if(myDataGridTableStyle1.ColumnHeadersVisible == true)
{
btnheader.Text = "Remove Header";
}
else
{
btnheader.Text = "Add Header";
}
AddCustomDataTableStyle();
}
private void AddCustomDataTableStyle()
{
myDataGridTableStyle1.ColumnHeadersVisibleChanged
+= new System.EventHandler(ColumnHeadersVisibleChanged_Handler);
// Set ColumnheaderVisible property.
myDataGridTableStyle1.MappingName = "Customers";
// Add a GridColumnStyle and set its MappingName
DataGridColumnStyle myBoolCol = new DataGridBoolColumn();
myBoolCol.MappingName = "Current";
myBoolCol.HeaderText = "IsCurrent Customer";
myBoolCol.Width = 150;
myDataGridTableStyle1.GridColumnStyles.Add(myBoolCol);
// Add a second column style.
DataGridColumnStyle myTextCol = new DataGridTextBoxColumn();
myTextCol.MappingName = "custName";
myTextCol.HeaderText = "Customer Name";
myTextCol.Width = 250;
myDataGridTableStyle1.GridColumnStyles.Add(myTextCol);
// Create new ColumnStyle objects
DataGridColumnStyle cOrderDate = new DataGridTextBoxColumn();
cOrderDate.MappingName = "OrderDate";
cOrderDate.HeaderText = "Order Date";
cOrderDate.Width = 100;
// PropertyDescriptor to create a formatted column.
PropertyDescriptorCollection myPropertyDescriptorCollection = this.BindingContext
[myDataSet, "Customers.custToOrders"].GetItemProperties();
// Create a formatted column using a PropertyDescriptor.
DataGridColumnStyle csOrderAmount =
new DataGridTextBoxColumn(myPropertyDescriptorCollection["OrderAmount"], "c", true);
csOrderAmount.MappingName = "OrderAmount";
csOrderAmount.HeaderText = "Total";
csOrderAmount.Width = 100;
// Add the DataGridTableStyle instances to GridTableStylesCollection.
myDataGrid.TableStyles.Add(myDataGridTableStyle1);
}
private void ColumnHeadersVisibleChanged_Handler(object sender,
EventArgs e)
{
myHeaderLabel.Text = "Header Status :"
+ myDataGridTableStyle1.ColumnHeadersVisible.ToString();
}
private void btnheader_Click(object sender, EventArgs e)
{
if(myDataGridTableStyle1.ColumnHeadersVisible == true)
{
myDataGridTableStyle1.ColumnHeadersVisible = false;
btnheader.Text = "Add Header";
}
else
{
myDataGridTableStyle1.ColumnHeadersVisible = true;
btnheader.Text = "Remove Header";
}
}
Private Sub DataGridTableStyle_Sample_Load(ByVal sender As Object, _
ByVal e As EventArgs) Handles MyBase.Load
myDataGridTableStyle1 = New DataGridTableStyle()
myHeaderLabel.Text = "Header Status :" + myDataGridTableStyle1.ColumnHeadersVisible.ToString()
If myDataGridTableStyle1.ColumnHeadersVisible = True Then
btnheader.Text = "Remove Header"
Else
btnheader.Text = "Add Header"
End If
AddCustomDataTableStyle()
End Sub
Private Sub AddCustomDataTableStyle()
AddHandler myDataGridTableStyle1.ColumnHeadersVisibleChanged, AddressOf ColumnHeadersVisibleChanged_Handler
' Set ColumnheaderVisible property.
myDataGridTableStyle1.MappingName = "Customers"
' Add a GridColumnStyle and set its MappingName
Dim myBoolCol = New DataGridBoolColumn()
myBoolCol.MappingName = "Current"
myBoolCol.HeaderText = "IsCurrent Customer"
myBoolCol.Width = 150
myDataGridTableStyle1.GridColumnStyles.Add(myBoolCol)
' Add a second column style.
Dim myTextCol = New DataGridTextBoxColumn()
myTextCol.MappingName = "custName"
myTextCol.HeaderText = "Customer Name"
myTextCol.Width = 250
myDataGridTableStyle1.GridColumnStyles.Add(myTextCol)
' Create new ColumnStyle objects
Dim cOrderDate = New DataGridTextBoxColumn()
cOrderDate.MappingName = "OrderDate"
cOrderDate.HeaderText = "Order Date"
cOrderDate.Width = 100
' PropertyDescriptor to create a formatted column.
Dim myPropertyDescriptorCollection As PropertyDescriptorCollection = _
Me.BindingContext(myDataSet, "Customers.custToOrders").GetItemProperties()
' Create a formatted column using a PropertyDescriptor.
Dim csOrderAmount = New DataGridTextBoxColumn(myPropertyDescriptorCollection("OrderAmount"), "c", True)
csOrderAmount.MappingName = "OrderAmount"
csOrderAmount.HeaderText = "Total"
csOrderAmount.Width = 100
' Add the DataGridTableStyle instances to GridTableStylesCollection.
myDataGrid.TableStyles.Add(myDataGridTableStyle1)
End Sub
Private Sub ColumnHeadersVisibleChanged_Handler(ByVal sender As Object, ByVal e As EventArgs)
myHeaderLabel.Text = "Header Status :" + myDataGridTableStyle1.ColumnHeadersVisible.ToString()
End Sub
Private Sub btnheader_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnheader.Click
If myDataGridTableStyle1.ColumnHeadersVisible = True Then
myDataGridTableStyle1.ColumnHeadersVisible = False
btnheader.Text = "Add Header"
Else
myDataGridTableStyle1.ColumnHeadersVisible = True
btnheader.Text = "Remove Header"
End If
End Sub
注解
若要设置网格中每列的标题文本，请设置 HeaderText 类的 DataGridColumnStyle 属性。
有关处理事件的详细信息，请参阅 处理和引发事件。
