1.界面:1个按钮+1个combobox;
2.开头阴影
using System.Runtime.InteropServices;
3.代码
private void Form1_Load(object sender, EventArgs e) { InitprinterComboBox(); //初始化打印机下拉列表选项 }
private void InitprinterComboBox() {// 初始化打印机列表 PrintDocument printDocument = new PrintDocument(); string defaultPrinter = printDocument.PrinterSettings.PrinterName;//获取默认打印机名 foreach (string printer in PrinterSettings.InstalledPrinters) {//获取所有打印机名称 combobox1.Items.Add(printer); if (printer == defaultPrinter) {//默认打印机设置在列表的第一项 combobox1.SelectedIndex = combobox1.Items.IndexOf(printer); } } }
private void button1_Click(object sender, EventArgs e) {//设置默认打印机按钮 try { if (Externs.SetDefaultPrinter(cmbPrinter.SelectedItem.ToString())) {//设置默认打印机 MessageBox.Show(cmbPrinter.SelectedItem.ToString() + "设置为默认打印机成功!"); } } catch(Exception ex) { MessageBox.Show("设置为默认打印机失败: "+ex.Message); } }
class Externs {//调用win api将指定名称的打印机设置为默认打印机 [DllImport("winspool.drv")]//引入 public static extern bool SetDefaultPrinter(String printerName);//定义外部库函数 }