DataGridTableStyle.ColumnHeadersVisibleChanged 事件
在 ColumnHeadersVisible 值更改时发生。
**命名空间:**System.Windows.Forms
**程序集:**System.Windows.Forms(在 system.windows.forms.dll 中)
语法
声明
Public Event ColumnHeadersVisibleChanged As EventHandler
用法
Dim instance As DataGridTableStyle
Dim handler As EventHandler
AddHandler instance.ColumnHeadersVisibleChanged, handler
public event EventHandler ColumnHeadersVisibleChanged
public:
event EventHandler^ ColumnHeadersVisibleChanged {
void add (EventHandler^ value);
void remove (EventHandler^ value);
}
/** @event */
public void add_ColumnHeadersVisibleChanged (EventHandler value)
/** @event */
public void remove_ColumnHeadersVisibleChanged (EventHandler value)
JScript 支持使用事件,但不支持进行新的声明。
备注
若要设置网格中每列的标题文本,请设置 DataGridColumnStyle 类的 HeaderText 属性。
有关处理事件的更多信息,请参见 使用事件。
示例
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 'DataGridTableStyle_Sample_Load
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 'AddCustomDataTableStyle
Private Sub ColumnHeadersVisibleChanged_Handler(ByVal sender As Object, ByVal e As EventArgs)
myHeaderLabel.Text = "Header Status :" + myDataGridTableStyle1.ColumnHeadersVisible.ToString()
End Sub 'ColumnHeadersVisibleChanged_Handler
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 'btnheader_Click
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:
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 DataGridTableStyleSampleLoad(Object sender, EventArgs e)
{
myDataGridTableStyle1 = new DataGridTableStyle();
myHeaderLabel.set_Text("Header Status :"
+ System.Convert.ToString(myDataGridTableStyle1.
get_ColumnHeadersVisible()));
if (myDataGridTableStyle1.get_ColumnHeadersVisible() == true) {
btnheader.set_Text("Remove Header");
}
else {
btnheader.set_Text("Add Header");
}
AddCustomDataTableStyle();
} //DataGridTableStyleSampleLoad
private void AddCustomDataTableStyle()
{
myDataGridTableStyle1.add_ColumnHeadersVisibleChanged(
new System.EventHandler(ColumnHeadersVisibleChanged_Handler));
// Set ColumnheaderVisible property.
myDataGridTableStyle1.set_MappingName("Customers");
// Add a GridColumnStyle and set its MappingName
DataGridColumnStyle myBoolCol = new DataGridBoolColumn();
myBoolCol.set_MappingName("Current");
myBoolCol.set_HeaderText("IsCurrent Customer");
myBoolCol.set_Width(150);
myDataGridTableStyle1.get_GridColumnStyles().Add(myBoolCol);
// Add a second column style.
DataGridColumnStyle myTextCol = new DataGridTextBoxColumn();
myTextCol.set_MappingName("custName");
myTextCol.set_HeaderText("Customer Name");
myTextCol.set_Width(250);
myDataGridTableStyle1.get_GridColumnStyles().Add(myTextCol);
// Create new ColumnStyle objects
DataGridColumnStyle cOrderDate = new DataGridTextBoxColumn();
cOrderDate.set_MappingName("OrderDate");
cOrderDate.set_HeaderText("Order Date");
cOrderDate.set_Width(100);
// PropertyDescriptor to create a formatted column.
PropertyDescriptorCollection myPropertyDescriptorCollection =
this.get_BindingContext().get_Item(myDataSet,
"Customers.custToOrders").GetItemProperties();
// Create a formatted column using a PropertyDescriptor.
DataGridColumnStyle csOrderAmount =
new DataGridTextBoxColumn(myPropertyDescriptorCollection.
get_Item("OrderAmount"), "c", true);
csOrderAmount.set_MappingName("OrderAmount");
csOrderAmount.set_HeaderText("Total");
csOrderAmount.set_Width(100);
// Add the DataGridTableStyle instances to GridTableStylesCollection.
myDataGrid.get_TableStyles().Add(myDataGridTableStyle1);
} //AddCustomDataTableStyle
private void ColumnHeadersVisibleChanged_Handler(Object sender,
EventArgs e)
{
myHeaderLabel.set_Text("Header Status :"
+ ((System.Boolean)myDataGridTableStyle1.
get_ColumnHeadersVisible()).ToString());
} //ColumnHeadersVisibleChanged_Handler
private void btnheader_Click(Object sender, EventArgs e)
{
if (myDataGridTableStyle1.get_ColumnHeadersVisible() == true) {
myDataGridTableStyle1.set_ColumnHeadersVisible(false);
btnheader.set_Text("Add Header");
}
else {
myDataGridTableStyle1.set_ColumnHeadersVisible(true);
btnheader.set_Text("Remove Header");
}
} //btnheader_Click
平台
Windows 98、Windows 2000 SP4、Windows CE、Windows Millennium Edition、Windows Mobile for Pocket PC、Windows Mobile for Smartphone、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition
.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表,请参见系统要求。
版本信息
.NET Framework
受以下版本支持:2.0、1.1、1.0
请参见
参考
DataGridTableStyle 类
DataGridTableStyle 成员
System.Windows.Forms 命名空间
DataGridTableStyle.HeaderBackColor 属性
DataGridTableStyle.HeaderForeColor 属性
DataGridTableStyle.ColumnHeadersVisible 属性
DataGridTableStyle.HeaderFont 属性