如何在抛出异常中将我的文本显示为错误文本？

Question

i wrote a window service project, i want to display an error message when some error occur, in OnStart() function, (with throw) then service isn't started.

protected override void OnStart(string[] args)
{
    // do some code ...

    // when some error occur:
    throw new System.Exception("my error text!!!");
 }

it is ok, and service isn't started. But 'my error text' isn't displayed!!! and the system shows own error text("Some services stop automatically if ...")

how do i show my text as an error text for users, when he starts service and some error occur?

Answer 1

You could try to display an error message using the MessageBox function of the User32.dll :

private const int MB_SERVICE_NOTIFICATION = 0x00200000;
private const int MB_ICONERROR = 0x00000010;

[DllImport("User32", EntryPoint = "MessageBox")]
private extern static int MsgBox(int hwnd, string lpText, string lpCaption, uint uType); 

protected override void OnStart(string[] args)
{
    // do some code ...

    // when some error occurred:
    MsgBox(0, "my error text!!!", "Error", MB_SERVICE_NOTIFICATION | MB_ICONERROR);
    throw new ApplicationException();
}