DataGridView.RowPostPaint 事件
定義
重要
部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。
發生在繪製 DataGridViewRow 之後。
public:
event System::Windows::Forms::DataGridViewRowPostPaintEventHandler ^ RowPostPaint;public event System.Windows.Forms.DataGridViewRowPostPaintEventHandler RowPostPaint;public event System.Windows.Forms.DataGridViewRowPostPaintEventHandler? RowPostPaint;member this.RowPostPaint : System.Windows.Forms.DataGridViewRowPostPaintEventHandler Public Custom Event RowPostPaint As DataGridViewRowPostPaintEventHandler 事件類型
範例
下列程式碼範例示範如何使用 事件的處理常式 RowPostPaint 來繪製跨越一般儲存格值下方整個資料列的文字內容。 此範例是How to： Customize the Appearance of Rows in the Windows Forms DataGridView Control中較大型範例的一部分。
// Paints the content that spans multiple columns and the focus rectangle.
void dataGridView1_RowPostPaint(object sender,
DataGridViewRowPostPaintEventArgs e)
{
// Calculate the bounds of the row.
Rectangle rowBounds = new Rectangle(
this.dataGridView1.RowHeadersWidth, e.RowBounds.Top,
this.dataGridView1.Columns.GetColumnsWidth(
DataGridViewElementStates.Visible) -
this.dataGridView1.HorizontalScrollingOffset + 1,
e.RowBounds.Height);
SolidBrush forebrush = null;
try
{
// Determine the foreground color.
if ((e.State & DataGridViewElementStates.Selected) ==
DataGridViewElementStates.Selected)
{
forebrush = new SolidBrush(e.InheritedRowStyle.SelectionForeColor);
}
else
{
forebrush = new SolidBrush(e.InheritedRowStyle.ForeColor);
}
// Get the content that spans multiple columns.
object recipe =
this.dataGridView1.Rows.SharedRow(e.RowIndex).Cells[2].Value;
if (recipe != null)
{
String text = recipe.ToString();
// Calculate the bounds for the content that spans multiple
// columns, adjusting for the horizontal scrolling position
// and the current row height, and displaying only whole
// lines of text.
Rectangle textArea = rowBounds;
textArea.X -= this.dataGridView1.HorizontalScrollingOffset;
textArea.Width += this.dataGridView1.HorizontalScrollingOffset;
textArea.Y += rowBounds.Height - e.InheritedRowStyle.Padding.Bottom;
textArea.Height -= rowBounds.Height -
e.InheritedRowStyle.Padding.Bottom;
textArea.Height = (textArea.Height / e.InheritedRowStyle.Font.Height) *
e.InheritedRowStyle.Font.Height;
// Calculate the portion of the text area that needs painting.
RectangleF clip = textArea;
clip.Width -= this.dataGridView1.RowHeadersWidth + 1 - clip.X;
clip.X = this.dataGridView1.RowHeadersWidth + 1;
RectangleF oldClip = e.Graphics.ClipBounds;
e.Graphics.SetClip(clip);
// Draw the content that spans multiple columns.
e.Graphics.DrawString(
text, e.InheritedRowStyle.Font, forebrush, textArea);
e.Graphics.SetClip(oldClip);
}
}
finally
{
forebrush.Dispose();
}
if (this.dataGridView1.CurrentCellAddress.Y == e.RowIndex)
{
// Paint the focus rectangle.
e.DrawFocus(rowBounds, true);
}
}
' Paints the content that spans multiple columns and the focus rectangle.
Sub dataGridView1_RowPostPaint(ByVal sender As Object, _
ByVal e As DataGridViewRowPostPaintEventArgs) _
Handles dataGridView1.RowPostPaint
' Calculate the bounds of the row.
Dim rowBounds As New Rectangle(Me.dataGridView1.RowHeadersWidth, _
e.RowBounds.Top, Me.dataGridView1.Columns.GetColumnsWidth( _
DataGridViewElementStates.Visible) - _
Me.dataGridView1.HorizontalScrollingOffset + 1, e.RowBounds.Height)
Dim forebrush As SolidBrush = Nothing
Try
' Determine the foreground color.
If (e.State And DataGridViewElementStates.Selected) = _
DataGridViewElementStates.Selected Then
forebrush = New SolidBrush(e.InheritedRowStyle.SelectionForeColor)
Else
forebrush = New SolidBrush(e.InheritedRowStyle.ForeColor)
End If
' Get the content that spans multiple columns.
Dim recipe As Object = _
Me.dataGridView1.Rows.SharedRow(e.RowIndex).Cells(2).Value
If (recipe IsNot Nothing) Then
Dim text As String = recipe.ToString()
' Calculate the bounds for the content that spans multiple
' columns, adjusting for the horizontal scrolling position
' and the current row height, and displaying only whole
' lines of text.
Dim textArea As Rectangle = rowBounds
textArea.X -= Me.dataGridView1.HorizontalScrollingOffset
textArea.Width += Me.dataGridView1.HorizontalScrollingOffset
textArea.Y += rowBounds.Height - e.InheritedRowStyle.Padding.Bottom
textArea.Height -= rowBounds.Height - e.InheritedRowStyle.Padding.Bottom
textArea.Height = (textArea.Height \ e.InheritedRowStyle.Font.Height) * _
e.InheritedRowStyle.Font.Height
' Calculate the portion of the text area that needs painting.
Dim clip As RectangleF = textArea
clip.Width -= Me.dataGridView1.RowHeadersWidth + 1 - clip.X
clip.X = Me.dataGridView1.RowHeadersWidth + 1
Dim oldClip As RectangleF = e.Graphics.ClipBounds
e.Graphics.SetClip(clip)
' Draw the content that spans multiple columns.
e.Graphics.DrawString(text, e.InheritedRowStyle.Font, forebrush, _
textArea)
e.Graphics.SetClip(oldClip)
End If
Finally
forebrush.Dispose()
End Try
If Me.dataGridView1.CurrentCellAddress.Y = e.RowIndex Then
' Paint the focus rectangle.
e.DrawFocus(rowBounds, True)
End If
End Sub
備註
您可以單獨或結合 RowPrePaint 事件來處理此事件，以自訂 控制項中的資料列外觀。 您可以自行繪製整個資料列，或繪製資料列的特定部分，並使用 類別的 DataGridViewRowPostPaintEventArgs 下列方法來繪製其他部分：
您也可以使用 VisualStyleRenderer 類別，使用目前的主題繪製標準控制項。 如需詳細資訊，請參閱 使用視覺化樣式轉譯控制項。 如果您使用 Visual Studio 2005，您也可以存取可與 控制項搭配 DataGridView 使用的大型標準映射庫。
如需如何處理事件的詳細資訊，請參閱 處理和引發事件。
