| 发表于：2007-01-21 01:06:45 楼主 |
代码：
using system;
using system.collections.generic;
using system.componentmodel;
using system.data;
using system.drawing;
using system.text;
using system.windows.forms;
using system.diagnostics;
namespace windowsapplication1
{
public partial class form1 : form
{
public form1（)
{
//
//required for windows form designer support
//
initializecomponent（);
//
//todo:add any constructor conde after initializecomponent call
//
linklabel1.links.clear（); //清楚链接标签中的所有超级链接
linklabel1.links.add（2,24, "http://www.microsoft.com ");
linklabel1.links.add（29,5, "http://www.yahoo.com ");
getfontfamilies（);
cbxfont.selectedindex = 1;//设置当前的选择项
lbxsize.selectedindex = 1;
}
private string[] fontfamilynames;
/// <summary>
/// 获取主窗体支持的字体族
/// </summary>
private void getfontfamilies（)
{
graphics g = this.creategraphics（);
fontfamily[] ffs = fontfamily.getfamilies（g);
fontfamilynames=new string[ffs.length];
for （int i = 0; i < ffs.length; i++)
{
fontfamilynames[i] = ffs[i].name;
cbxfont.items.add（ffs[i].name);
}
}
private void cbxfont_selectedindexchanged（object sender, eventargs e)
{
float fontsize;
//从列表框lbxsize中获取字体的大小
if （lbxsize.selectedindex == -1)
fontsize = float.parse（lbxsize.items[1].tostring（));
else
fontsize = float.parse（lbxsize.selecteditem.tostring（));
//创建新的字体对象并不它赋给文本框控件txtedit
txtedit.font = new font（cbxfont.text, fontsize);
}
private void lbxsize_selectedindexchanged（object sender, eventargs e)
{
string fontname;
//从组合框cbxfont中获取字体族的名称
if （cbxfont.selectedindex == -1)
fontname = cbxfont.items[32].tostring（);
else
fontname = cbxfont.text;
txtedit.font=new font（fontname,float.parse（lbxsize.selecteditem.tostring（)));
}
private void btncopy_click（object sender, eventargs e)
{
if （txtedit.selectionlength > 0)
txtedit.copy（);
}
private void btncut_click（object sender, eventargs e)
{
if （txtedit.selectionlength > 0)
txtedit.cut（);
}
private void btnpaste_click（object sender, eventargs e)
{
txtedit.paste（);
}
private void btnundo_click（object sender, eventargs e)
{
if （txtedit.canundo == true)
{
txtedit.undo（);
txtedit.clearundo（);
}
}
private void linklabel1_linkclicked（object sender, linklabellinkclickedeventargs e)
{
//打开浏览器浏览被单击的超级链接
if（e.link.linkdata.tostring（) != null)
process.start（e.link.linkdata.tostring（));
}
private void cbxfont_measureitem（object sender, measureitemeventargs e)
{
//设定每一项的宽度和高度
e.itemheight = 20;
e.itemwidth = 200;
}
private void cbxfont_drawitem（object sender, drawitemeventargs e)
{
//以不同的字体显示相应的字体族的名称
font f = new font（fontfamilynames[e.index], 12);
bitmap bmp = new bitmap（ "ttfont.bmp ");
bmp.maketransparent（color.white);
graphics g = e.graphics;
e.drawbackground（);
solidbrush b = new solidbrush（e.forecolor);
g.drawimage（bmp,e.bounds.x,e.bounds.y);
//g.drawimage（fontfamilynames[e.index],f,b,e.bounds.x+18,e.bounds.y);
g.drawstring（fontfamilynames[e.index], f, b, e.bounds.x + 18, e.bounds.y);
e.drawfocusrectangle（);
}
}
}
出现了一个argumentexception异常 怎么解决呢？ 谢谢各位！！
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