I am creating a windows setup file in .net 2005 framework 2.0
I am using installer class to control the installation as custom Action, while installing i do onlie verification getting username and password,
Now the thing is if the verification fails the installation should be cancelled?
How do i implement this in custom action from installer class.
Although the OP likely will not be able to benefit from this post, this article comes up in Google rankings high for the error he received when calling the Rollback method manually.
You can throw a new Exception or InstallException, but this creates an unsightly error message which you would not want your users to see.
An alternative would be to click/call the cancel button for the base installer from your custom action code.
To work around this, simply import User32.dll and call the "SendMessage" function, passing in the handle of cancel button. See code example below:
[DllImport("User32.dll", EntryPoint = "SendMessage")]
public static extern int SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, IntPtr lParam);
[DllImport("user32.dll", SetLastError = true)]
private static extern IntPtr FindWindowEx(IntPtr parentHandle, IntPtr childAfter, string className, string windowTitle);
[DllImport("user32.dll", SetLastError = true)]
public static extern IntPtr SetActiveWindow(IntPtr hWnd);
[DllImport("user32.dll", SetLastError = true)]
static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
[DllImport("user32.dll")]
static extern bool ShowWindow(IntPtr hWnd, ShowWindowCommands nCmdShow);
enum ShowWindowCommands : int
{
Hide = 0,
Normal = 1,
ShowMinimized = 2,
Maximize = 3,
ShowMaximized = 3,
ShowNoActivate = 4,
Show = 5,
Minimize = 6,
ShowMinNoActive = 7,
ShowNA = 8,
Restore = 9,
ShowDefault = 10,
ForceMinimize = 11
}
public static string InstallTitle = "AppbarTitle"; //used to get the window handle
public override void Install(System.Collections.IDictionary stateSaver)
{
ShowWindow(msiwindowhandle, ShowWindowCommands.Show);
IntPtr cancelbuttonhandle;
const int BM_CLICK = 0x00F5;
msiwindowhandle = FindWindow("#32770", InstallTitle);
cancelbuttonhandle = FindWindowEx(msiwindowhandle, IntPtr.Zero, "Button", "Cancel");
SetActiveWindow(msiwindowhandle); //necessary for button click to fire
SendMessage(cancelbuttonhandle, BM_CLICK, IntPtr.Zero, IntPtr.Zero);
}
How to stop or cancel installation in Installer class? in .net 2005
) by a message box with a yes no message. Then you just throw the excteption. Since there is an exception (the one you throw) during installation, the installer will rollback all it has done.
