引用WINDOWS API:
[DllImport("gdi32.dll", CharSet = CharSet.Auto)]
public static extern int SetTextCharacterExtra(IntPtr hdc, int nCharExtra);//图片字符间距
[DllImport("gdi32.dll")]
public static extern bool DeleteObject(IntPtr handle);
[DllImport("gdi32.dll")]
public static extern IntPtr SelectObject(IntPtr hdc, IntPtr bmp);
.NET 2.0
/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
/// <param name="fontSpace"></param>
private void pictureBox_Paint(object sender, PaintEventArgs e)
{
Graphics g = e.Graphics;
Font font = new Font("宋体", 12.0F); Brush brush = Brushes.Red;
string text2 = "涂聚文";
IntPtr hdc = e.Graphics.GetHdc();
SetTextCharacterExtra(hdc, 16); // 设置字符间距
e.Graphics.ReleaseHdc(hdc);
e.Graphics.DrawString(text2, font, brush, 20, 25);// //pictureBox1.Paint += new System.Windows.Forms.PaintEventHandler(this.pictureBox1_Paint);
}
.NET 3.5以上:
/// <summary>
/// 图片的字符间距(只对中文，数字，字母，符号有效，在中文环境下，中文日文混排无效)
/// 涂聚文
/// .net3.0以上
/// </summary>
/// <param name="width">图片宽度</param>
/// <param name="height">图片高度</param>
/// <param name="space">字间距</param>
/// <param name="strtext">要显示的文字</param>
/// <returns>图片</returns>
Bitmap CreateImageString(int width, int height,int space ,string strtext)
{
Bitmap image = new Bitmap(width, height);
using (Graphics g = Graphics.FromImage(image))
{
//绘制图片边框
//g.DrawRectangle(Pens.Black, 0, 0, width - 1, height - 1); Font font = new Font("宋体", 12.0F); Brush brush = Brushes.Red;
//绘制设置了字符间距的输出
DrawStringExtra(g, space, x =>
{
x.DrawString(strtext, font, brush, 0, 2);
});
}
return image;
} /// <summary>
///
/// </summary>
/// <param name="g"></param>
/// <param name="nCharExtra"></param>
/// <param name="action"></param>
void DrawStringExtra(Graphics g, int nCharExtra, Action<Graphics> action)
{
IntPtr hdc = g.GetHdc();
SetTextCharacterExtra(hdc, nCharExtra);
try
{
using (Graphics g1 = Graphics.FromHdc(hdc))
{
action(g1);
}
}
finally
{
SetTextCharacterExtra(hdc, 0);
g.ReleaseHdc(hdc);
}
}
调用:(可以应用于打印中)
pictureBox1.Image = CreateImageStrin(100, 30, 10, "3315000");
.net 2.0自写填空格来设置字间距，高版本有：Padding,PadRight,PadLeft
/// <summary>
/// 字符填充空格，而从设置字符间距
/// 涂聚文
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public string SetPadstring(string str,int padwidth)
{
string s = string.Empty;
string m = string.Empty;
if (str.Length > 0)
{
char[] arr = str.ToCharArray();
foreach (char d in arr)
{
//MessageBox.Show(d.ToString());
m = m + d + PadRight(padwidth);
}
}
s = m;
return s;
} /// <summary>
/// 填充空格
/// </summary>
/// <param name="totalWidth"></param>
/// <returns></returns>
public string PadLeft(int totalWidth)
{
string s=""; if (totalWidth > 0)
{
for (int i = 0; i < totalWidth; i++)
{
s =" "+ s ;
}
}
return s;
} /// <summary>
/// 填充空格
/// </summary>
/// <param name="TotalWidth"></param>
/// <returns></returns>
public string PadRight(int TotalWidth)
{
string s = "";
if (TotalWidth > 0)
{
for (int i = 0; i < TotalWidth; i++)
{
s = s + " ";
}
} return s;
}
//测试
string cs = "331500涂聚文";
//char[] arr = cs.ToCharArray();
//foreach (char d in arr)
//{
// //MessageBox.Show(d.ToString());
// m = m + d+PadRight(1);
//}
//MessageBox.Show(m);
MessageBox.Show(SetPadstring(cs, 1));