从我的自定义操作取消安装

Question

我正在使用Windows Installer（而不是wix）为我的程序编写安装程序。 在某些情况下，我想从我的自定义操作中取消安装过程。除此之外，我想用我的文字显示错误信息。 这是怎么回事？

C＃，.net 3.5

Answer 1

您可以通过创建错误自定义操作来完成此操作。将错误自定义操作的条件设置为失败条件（如果条件评估为true，安装将失败）并将消息设置为您的自定义文本。我

Answer 2

工作的事情：

背景：由于某种原因，我需要检查，如果用户安装了3.5SP1，取消安装并重定向到正确的下载页面如果不是。

第一步： 修改您的安装这样

[System.Security.Permissions.SecurityPermission(System.Security.Permissions.SecurityAction.Demand)] 
    public override void Install(IDictionary stateSaver) 
    { 
     //Check if the FrameWork 3.5SP1 is installed 
     if (mycondition) 
     { 
      //3.5SP1 is installed, ask for framework install 
      if (TopMostMessageBox.Show("body", "title", MessageBoxButtons.YesNo) == DialogResult.Yes) 
       System.Diagnostics.Process.Start("http://Microsoft FRW Link"); 

      WindowHandler.Terminate(); 
     } 
     else 
      base.Install(stateSaver); 
    } 

第二步： 使用该代码托管您的MessageBox（我把它在其他地方，没有时间由我自己找到它）

static public class TopMostMessageBox 
{ 
    static public DialogResult Show(string message) 
    { 
     return Show(message, string.Empty, MessageBoxButtons.OK); 
    } 

    static public DialogResult Show(string message, string title) 
    { 
     return Show(message, title, MessageBoxButtons.OK); 
    } 

    static public DialogResult Show(string message, string title, 
     MessageBoxButtons buttons) 
    { 
     // Create a host form that is a TopMost window which will be the 

     // parent of the MessageBox. 

     Form topmostForm = new Form(); 
     // We do not want anyone to see this window so position it off the 

     // visible screen and make it as small as possible 

     topmostForm.Size = new System.Drawing.Size(1, 1); 
     topmostForm.StartPosition = FormStartPosition.Manual; 
     System.Drawing.Rectangle rect = SystemInformation.VirtualScreen; 
     topmostForm.Location = new System.Drawing.Point(rect.Bottom + 10, 
      rect.Right + 10); 
     topmostForm.Show(); 
     // Make this form the active form and make it TopMost 

     topmostForm.Focus(); 
     topmostForm.BringToFront(); 
     topmostForm.TopMost = true; 
     // Finally show the MessageBox with the form just created as its owner 

     DialogResult result = MessageBox.Show(topmostForm, message, title, 
      buttons); 
     topmostForm.Dispose(); // clean it up all the way 


     return result; 
    } 
} 

第三步： 杀死MSIEXEC

internal static class WindowHandler 
{ 
    internal static void Terminate() 
    { 
     var processes = Process.GetProcessesByName("msiexec").OrderBy(x => x.StartTime); \\DO NOT FORGET THE ORDERBY!!! It makes the msi processes killed in the right order 
     foreach (var process in processes) 
     { 
      var hWnd = process.MainWindowHandle.ToInt32(); 
      ShowWindow(hWnd, 0); //This is to hide the msi window and only show the popup 
      try 
      { 
       process.Kill(); 
      } 
      catch 
      { 
      } 
     } 
    } 

    [DllImport("User32")] 
    private static extern int ShowWindow(int hwnd, int nCmdShow); 
} 

用不带振动筛的勺子将其混合并送达;）

Answer 3

仅从您的自定义动作返回ERROR_INSTALL_USEREXIT。

http://msdn.microsoft.com/en-us/library/windows/desktop/aa368072(v=vs.85).aspx

请参阅如何显示错误消息在以下链接：

http://msdn.microsoft.com/en-us/library/windows/desktop/aa371247(v=vs.85).aspx