C# 常用功能

来源：互联网发布：网络协议为什么要分层编辑：程序博客网时间：2024/05/22 09:44

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private Bitmap BmpPrint = null;

private void WindowLoaded(object sender, EventArgs e)

{

foreach (String strPrinter in PrinterSettings.InstalledPrinters)
            {
                cmb_printers.Items.Add(strPrinter);
                if (strPrinter == strDefaultPrinter)//把默认打印机设为缺省值
                {
                    cmb_printers.SelectedIndex = cmb_printers.Items.IndexOf(strPrinter);
                }

}

private void btn_PrintBmp_Click(object sender, RoutedEventArgs e)
{

if (string.IsNullOrEmpty(this.cmb_printers.Text.Trim().ToString())) return;

System.Drawing.Printing.PrintDocument pd = new System.Drawing.Printing.PrintDocument();
pd.PrinterSettings.PrinterName = this.cmb_printers.Text.Trim();

string str_ko = “D:\\1.bmp”

                   if (File.Exists(str_ko))
                    {
                        BmpPrint = new Bitmap(str_ko);

                         //横打
                        if (koBmpPrint.Width > koBmpPrint.Height)
                        {
                            pd.DefaultPageSettings.Landscape = true;
                        }
                        else//竖打
                        {
                            pd.DefaultPageSettings.Landscape = false;
                        }
                        pd.PrintPage += new System.Drawing.Printing.PrintPageEventHandler(pd_PrintPage);
                        pd.Print();
                        koBmpPrint.Dispose();

            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.StackTrace + ex.Message);
                throw;
            }

}

/// <summary>
        /// 图片自适应/原始居中输出至A4纸张
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        void pd_PrintPage(object sender, PrintPageEventArgs e)
        {
            e.Graphics.DrawImage(koBmpPrint, e.Graphics.VisibleClipBounds);//可见剪辑区域的边框
        }

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