C# 实现简单打印的实例代码

主窗体代码如下:

public partial class printfileform : form
    {
        public printfileform()
        {
            initializecomponent();
            printfile prinfile = new printfile();
            prinfile.print();
        }
    }

打印文件类如下:

class printfile
    {
        streamreader sr = null;
        font printfont = new font("宋体", 12);
        public void print()
        {
            try
            {
                sr = new streamreader(@"f:\temp.txt");
                try
                {
                    printdocument printdoc = new printdocument();
                    printdoc.printpage += printdoc_printpage;
                    printdoc.print();
                }
                finally
                {
                    sr.close();
                }

            }
            catch (exception ex)
            {
                console.writeline(ex.message);
            }

        }

        void printdoc_printpage(object sender, printpageeventargs e)
        {
            string line = null;
            //设置一页的行数=打印区域的高度除以字体高度.
            float pageline = e.marginbounds.height / printfont.getheight(e.graphics);
            //循环打印每一行
            for (int count = 0; count < pageline && ((line=sr.readline())!=null); count++)
            {
                float singleline=e.marginbounds.top+(count*printfont.getheight(e.graphics));
                e.graphics.drawstring(line, printfont, brushes.black, e.marginbounds.left, singleline);
            }
            //判断是否继续打印
            if (line != null)
                e.hasmorepages = true;
            else
                e.hasmorepages = false;

        }
    }