dotnet winform在 Windows 窗体上绘制垂直文本

如何：在 Windows 窗体上绘制垂直文本

下面的代码示例演示如何使用 Graphics
的 DrawString
方法在窗体上绘制竖排文字。

示例

Visual Basic

Public Sub DrawVerticalString()
    Dim formGraphics As System.Drawing.Graphics = Me.CreateGraphics()
    Dim drawString As String = "Sample Text"
    Dim drawFont As New System.Drawing.Font("Arial", 16)
    Dim drawBrush As New _
        System.Drawing.SolidBrush(System.Drawing.Color.Black)
    Dim x As Single = 150.0
    Dim y As Single = 50.0
    Dim drawFormat As New System.Drawing.StringFormat
    drawFormat.FormatFlags = StringFormatFlags.DirectionVertical
    formGraphics.DrawString(drawString, drawFont, drawBrush, _
    x, y, drawFormat)
    drawFont.Dispose()
    drawBrush.Dispose()
    formGraphics.Dispose()
End Sub

public void DrawVerticalString()
{
    System.Drawing.Graphics formGraphics = this.CreateGraphics();
    string drawString = "Sample Text";
    System.Drawing.Font drawFont = new System.Drawing.Font("Arial", 16);
    System.Drawing.SolidBrush drawBrush = new System.Drawing.SolidBrush(System.Drawing.Color.Black);
    float x = 150.0F;
    float y = 50.0F;
    System.Drawing.StringFormat drawFormat = new System.Drawing.StringFormat();
    drawFormat.FormatFlags = StringFormatFlags.DirectionVertical;
    formGraphics.DrawString(drawString, drawFont, drawBrush, x, y, drawFormat);
    drawFont.Dispose();
    drawBrush.Dispose();
    formGraphics.Dispose();
}

C++

public:
    void DrawVerticalString()
    {
        System::Drawing::Graphics^ formGraphics = this->CreateGraphics();
        String^ drawString = "Sample Text";
        System::Drawing::Font^ drawFont =
            gcnew System::Drawing::Font("Arial", 16);
        System::Drawing::SolidBrush^ drawBrush = gcnew
            System::Drawing::SolidBrush(System::Drawing::Color::Black);
        float x = 150.0F;
        float y = 50.0F;
        System::Drawing::StringFormat^ drawFormat =
            gcnew System::Drawing::StringFormat();
        drawFormat->FormatFlags = StringFormatFlags::DirectionVertical;
        formGraphics->DrawString(drawString, drawFont, drawBrush, x,
            y, drawFormat);
        delete drawFont;
        delete drawBrush;
        delete formGraphics;
    }

编译代码

不能在 Load
事件处理程序中调用此方法。如果已调整该窗体的大小或者其他窗体遮蔽了该窗体，则不会重绘所绘制的内容。若要自动重绘内容，应该重写 OnPaint
方法。

可靠编程

以下情况可能会导致异常：

未安装 Arial 字体。

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