Graphics.TranslateTransform设置旋转角度不起作用,google搜索了一下,发现有n个人问这个问题。下面有解决办法。
Graphics.TranslateTransform设置旋转角度不起作用,如下代码,google搜索了一下,发现有n个人问这个问题。下面有解决办法。
![](https://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
Graphics
class Program
{
static void Main(string[] args)
{
string filePath =@"d:\bm.jpg";
if (File.Exists(filePath))
{
File.Delete(filePath);
}
using (Bitmap bm = new Bitmap(500,500))
{
using (Graphics g = Graphics.FromImage(bm))
{
g.Clear(Color.Wheat);
FontFamily ff = new FontFamily("宋体");
Font f =new Font(ff,10);
Brush b = new SolidBrush(Color.Black);
StringFormat sf = new StringFormat();
g.DrawString("白日依山尽", f, b, new PointF(10, 10), sf);
g.DrawString("欲穷千里目", f, b, new PointF(10, 10 + 30 + 10), sf);
g.TranslateTransform(0, 0, MatrixOrder.Prepend);
g.RotateTransform(45);
}
bm.Save(filePath, ImageFormat.Jpeg);
}
Process.Start(filePath);
}
}
其实上面的程序写的没错,就是调用RotateTransform的时机不对,应该放到画字符串之前,因为这个方法设置的是画笔的旋转角度,所以必须先转角度,然后再画才有效果。正确的做法是:
![](https://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
正确的做法
class Program
{
static void Main(string[] args)
{
string filePath =@"d:\bm.jpg";
if (File.Exists(filePath))
{
File.Delete(filePath);
}
using (Bitmap bm = new Bitmap(500,500))
{
using (Graphics g = Graphics.FromImage(bm))
{
g.Clear(Color.Wheat);
g.TranslateTransform(0, 0, MatrixOrder.Prepend);
g.RotateTransform(45);
FontFamily ff = new FontFamily("宋体");
Font f =new Font(ff,10);
Brush b = new SolidBrush(Color.Black);
StringFormat sf = new StringFormat();
g.DrawString("白日依山尽", f, b, new PointF(10, 10), sf);
g.DrawString("欲穷千里目", f, b, new PointF(10, 10 + 30 + 10), sf);
}
bm.Save(filePath, ImageFormat.Jpeg);
}
Process.Start(filePath);
}
}