C# Console利用mspaint打开图像并保存的方法

完整demo程序代码如下：

using System;
using System.Text;
using System.Diagnostics;
using System.Threading;
using System.Windows.Automation;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Forms;
namespace UIATest
{
  class Program
  {
    static void Main(string[] args)
    {
      Process process = Process.Start(@"E:WorkBookATPWpfAppbinDebugWpfApp.exe");
      int processId = process.Id;
      AutomationElement element = FindElementById(processId, "textBox1");
      SendKeys sendkeys = new SendKeys();
      sendkeys.Sendkeys(element, "Sending keys to input data");
      Console.WriteLine(sendkeys.ToString());
      sendkeys.Sendkeys(element, sendkeys.ContextMenu);
      Console.WriteLine(sendkeys.ToString());
      Console.WriteLine("Test finised."); 
    }
    /// <summary>
    /// Get the automation elemention of current form.
    /// </summary>
    /// <param name="processId">Process Id</param>
    /// <returns>Target element</returns>
    public static AutomationElement FindWindowByProcessId(int processId)
    {
      AutomationElement targetWindow = null;
      int count = 0;
      try
      {
        Process p = Process.GetProcessById(processId);
        targetWindow = AutomationElement.FromHandle(p.MainWindowHandle);
        return targetWindow;
      }
      catch (Exception ex)
      {
        count++;
        StringBuilder sb = new StringBuilder();
        string message = sb.AppendLine(string.Format("Target window is not existing.try #{0}", count)).ToString();
        if (count > 5)
        {
          throw new InvalidProgramException(message, ex);
        }
        else
        {
          return FindWindowByProcessId(processId);
        }
      }
    }
    /// <summary>
    /// Get the automation element by automation Id.
    /// </summary>
    /// <param name="windowName">Window name</param>
    /// <param name="automationId">Control automation Id</param>
    /// <returns>Automatin element searched by automation Id</returns>
    public static AutomationElement FindElementById(int processId, string automationId)
    {
      AutomationElement aeForm = FindWindowByProcessId(processId);
      AutomationElement tarFindElement = aeForm.FindFirst(TreeScope.Descendants,
      new PropertyCondition(AutomationElement.AutomationIdProperty, automationId));
      return tarFindElement;
    }
  }
}