[英]how do I center align drawstring bmp from text input in picturebox c#
我是一個初學者,正在編寫一個簡單的 windows 桌面表單應用程序,其中包含用戶輸入的文本框,然后單擊按鈕將該文本轉換為圖片框中顯示的 bitmap(在 LED 顯示面板上顯示時僅為 96 x 64 像素) ).
從 Stack overflow 中借用了一些很好的例子來找到一個可行的解決方案。 一切正常,除了它不會居中對齊。
我可以讓它很好地左對齊,但是當我添加新的 Create a stringformat to center align 和 line center align 時,文本然后向左和向上移動得更遠 - 不確定它是否是圖像填充?
這是我到目前為止所擁有的
private void button18_Click(object sender, EventArgs e)
{
//dispose previous image
File.Delete("myimage.bmp");
// Our text to paint
String str = textBox1.Text;
// Create our new bitmap object
Bitmap bmp = new Bitmap(96,64);
Image img = Image.FromHbitmap(bmp.GetHbitmap());
// Get our graphics object
Graphics g = Graphics.FromImage(img);
g.Clear(Color.Transparent);
// Define our image padding
var imgPadding = new Rectangle(1, 1, 1, 1);
// Determine the size of our text, using our specified font.
Font ourFont = new Font(
FontFamily.GenericSansSerif,
10.0f,
FontStyle.Regular,
GraphicsUnit.Point
);
SizeF strSize = g.MeasureString(
str,
ourFont,
(bmp.Width - imgPadding.Left - imgPadding.Right),
StringFormat.GenericDefault
);
// Create a StringFormat object with the each line of text, and the block
// of text centered on the page.
StringFormat stringFormat = new StringFormat();
stringFormat.Alignment = StringAlignment.Center;
stringFormat.LineAlignment = StringAlignment.Center;
// Create our brushes
SolidBrush textBrush = new SolidBrush(Color.White);
// Draw our string to the bitmap using our graphics object
g.DrawString(str, ourFont, textBrush, imgPadding.Left, imgPadding.Top, stringFormat);
// Flush
g.Flush(System.Drawing.Drawing2D.FlushIntention.Sync);
// Save our image.
img.Save("myImage.bmp", System.Drawing.Imaging.ImageFormat.Bmp);
// Clean up
textBrush.Dispose();
g.Dispose();
bmp.Dispose();
//showimageon screen
Image img1;
using (var bmpTemp = new Bitmap("myImage.bmp"))
{
img1 = new Bitmap(bmpTemp);
}
pictureBox4.Image = img1;
我是否有 stringformat.genericdefault 似乎並不重要。 非常感謝有人的幫助。
imgPadding 應與圖像具有相同的寬度和高度。
我對您的代碼做了一些重寫以使其工作:
//dispose previous image
File.Delete("myimage.bmp");
// Our text to paint
String str = textBox1.Text;
// Create our new bitmap object
Bitmap bmp = new Bitmap(96, 64);
Image img = Image.FromHbitmap(bmp.GetHbitmap());
// Get our graphics object
Graphics g = Graphics.FromImage(img);
g.Clear(Color.Transparent);
// Define our image padding and set same with/height as image.
var imgPadding = new Rectangle(0, 0, bmp.Width, bmp.Height);
// Determine the size of our text, using our specified font.
Font ourFont = new Font(
FontFamily.GenericSansSerif,
10.0f,
FontStyle.Regular,
GraphicsUnit.Point
);
// Create a StringFormat object with the each line of text, and the block
// of text centered on the page.
StringFormat stringFormat = new StringFormat() { Alignment = StringAlignment.Center, LineAlignment = StringAlignment.Center };
// Create our brushes
SolidBrush textBrush = new SolidBrush(Color.White);
// Draw our string to the bitmap using our graphics object
g.DrawString(str, ourFont, textBrush, imgPadding, stringFormat);
// Flush
g.Flush(System.Drawing.Drawing2D.FlushIntention.Sync);
// Save our image.
img.Save("myImage.bmp", System.Drawing.Imaging.ImageFormat.Bmp);
// Clean up
textBrush.Dispose();
g.Dispose();
bmp.Dispose();
//showimageon screen
Image img1;
using (var bmpTemp = new Bitmap("myImage.bmp"))
{
img1 = new Bitmap(bmpTemp);
}
pictureBox4.Image = img1;
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