问题
Is there any method to display pop up message like MessageBox.Show in .NET core?
回答1:
No. .NET Core is focused on web, Messagebox is a winforms thing. And there is no winforms support in .NET Core.
EDIT:
A more-or-less official answer on "Why is there no Microsoft.UI.WinForms .Net Core package"
My team (the Microsoft .NET team) is focused on .NET Core as a cloud and web framework. We know that folks would like us to build additional application types for .NET Core. For now, we're remaining focused. Many other developers want us to stay focused on what we've started with .NET Core and that's our intention.
https://github.com/dotnet/core/issues/374
回答2:
One of the problems of a cheap replacement is, there's no equivalent function on Linux (or Mac).
So you can either write your own with many pinvokes and structures, or you can just use the "notify-send" command, which opens a "notification bubble" on Linux.
WindowManager.MsgBoxResult result = WindowManager.Interaction
.MsgBox("Message", "Title", MsgBoxStyle.OkCancel);
Here's my implementation:
namespace WindowManager
{
public enum MsgBoxResult
: int
{
Abort = 3,
Cancel = 2,
Ignore = 5,
No = 7,
Ok = 1,
Retry = 4,
Yes = 6
}
//[System.Flags]
//public enum MsgBoxStyle
// : int
//{
// AbortRetryIgnore = 2,
// ApplicationModal = 0,
// Critical = 0x10,
// DefaultButton1 = 0,
// DefaultButton2 = 0x100,
// DefaultButton3 = 0x200,
// Exclamation = 0x30,
// Information = 0x40,
// MsgBoxHelp = 0x4000,
// MsgBoxRight = 0x80000,
// MsgBoxRtlReading = 0x100000,
// MsgBoxSetForeground = 0x10000,
// OkCancel = 1,
// OkOnly = 0,
// Question = 0x20,
// RetryCancel = 5,
// SystemModal = 0x1000,
// YesNo = 4,
// YesNoCancel = 3
//}
[System.Flags]
public enum MsgBoxStyle
{
/// <summary>
/// OK button only (default). This member is equivalent to the Visual Basic constant <see langword="vbOKOnly" />.</summary>
OkOnly = 0,
/// <summary>
/// OK and Cancel buttons. This member is equivalent to the Visual Basic constant <see langword="vbOKCancel" />.</summary>
OkCancel = 1,
/// <summary>
/// Abort, Retry, and Ignore buttons. This member is equivalent to the Visual Basic constant <see langword="vbAbortRetryIgnore" />.</summary>
AbortRetryIgnore = 2,
/// <summary>
/// Yes, No, and Cancel buttons. This member is equivalent to the Visual Basic constant <see langword="vbYesNoCancel" />.</summary>
YesNoCancel = AbortRetryIgnore | OkCancel, // 0x00000003
/// <summary>
/// Yes and No buttons. This member is equivalent to the Visual Basic constant <see langword="vbYesNo" />.</summary>
YesNo = 4,
/// <summary>
/// Retry and Cancel buttons. This member is equivalent to the Visual Basic constant <see langword="vbRetryCancel" />.</summary>
RetryCancel = YesNo | OkCancel, // 0x00000005
/// <summary>Critical message. This member is equivalent to the Visual Basic constant <see langword="vbCritical" />.</summary>
Critical = 16, // 0x00000010
/// <summary>Warning query. This member is equivalent to the Visual Basic constant <see langword="vbQuestion" />.</summary>
Question = 32, // 0x00000020
/// <summary>Warning message. This member is equivalent to the Visual Basic constant <see langword="vbExclamation" />.</summary>
Exclamation = Question | Critical, // 0x00000030
/// <summary>Information message. This member is equivalent to the Visual Basic constant <see langword="vbInformation" />.</summary>
Information = 64, // 0x00000040
/// <summary>First button is default. This member is equivalent to the Visual Basic constant <see langword="vbDefaultButton1" />.</summary>
DefaultButton1 = 0,
/// <summary>Second button is default. This member is equivalent to the Visual Basic constant <see langword="vbDefaultButton2" />.</summary>
DefaultButton2 = 256, // 0x00000100
/// <summary>Third button is default. This member is equivalent to the Visual Basic constant <see langword="vbDefaultButton3" />.</summary>
DefaultButton3 = 512, // 0x00000200
/// <summary>Application modal message box. This member is equivalent to the Visual Basic constant <see langword="vbApplicationModal" />.</summary>
ApplicationModal = 0,
/// <summary>System modal message box. This member is equivalent to the Visual Basic constant <see langword="vbSystemModal" />.</summary>
SystemModal = 4096, // 0x00001000
/// <summary>Help text. This member is equivalent to the Visual Basic constant <see langword="vbMsgBoxHelp" />.</summary>
MsgBoxHelp = 16384, // 0x00004000
/// <summary>Right-aligned text. This member is equivalent to the Visual Basic constant <see langword="vbMsgBoxRight" />.</summary>
MsgBoxRight = 524288, // 0x00080000
/// <summary>Right-to-left reading text (Hebrew and Arabic systems). This member is equivalent to the Visual Basic constant <see langword="vbMsgBoxRtlReading" />.</summary>
MsgBoxRtlReading = 1048576, // 0x00100000
/// <summary>Foreground message box window. This member is equivalent to the Visual Basic constant <see langword="vbMsgBoxSetForeground" />.</summary>
MsgBoxSetForeground = 65536, // 0x00010000
}
// https://docs.microsoft.com/en-us/windows/desktop/api/winuser/nf-winuser-messagebox
internal class UnsafeNativeMethods
{
[System.Runtime.InteropServices.DllImport("user32.dll")]
internal static extern MsgBoxResult MessageBox(System.IntPtr hWnd, string text, string caption, MsgBoxStyle options);
}
public class Interaction
{
private static string GetTitleFromAssembly(System.Reflection.Assembly CallingAssembly)
{
try
{
return CallingAssembly.GetName().Name;
}
catch (System.Security.SecurityException)
{
string fullName = CallingAssembly.FullName;
int index = fullName.IndexOf(',');
if (index >= 0)
{
return fullName.Substring(0, index);
}
return "";
}
}
public static MsgBoxResult MsgBox(string text, string caption, MsgBoxStyle options)
{
if (string.IsNullOrEmpty(caption))
caption = GetTitleFromAssembly(System.Reflection.Assembly.GetCallingAssembly());
if (System.Environment.OSVersion.Platform != System.PlatformID.Unix)
return UnsafeNativeMethods.MessageBox(System.IntPtr.Zero, text, caption, options);
text = text.Replace("\"", @"\""");
caption = caption.Replace("\"", @"\""");
using (System.Diagnostics.Process p = System.Diagnostics.Process.Start("notify-send", "\"" + caption + "\" \"" + text + "\""))
{
p.WaitForExit();
}
return MsgBoxResult.Ok;
}
public static MsgBoxResult MsgBox(string text, string caption)
{
return MsgBox(text, caption, MsgBoxStyle.OkOnly);
}
public static MsgBoxResult MsgBox(string text)
{
return MsgBox(text, null);
}
public static MsgBoxResult MsgBox(object objText, object objCaption)
{
string text = System.Convert.ToString(objText, System.Globalization.CultureInfo.InvariantCulture);
string caption = System.Convert.ToString(objCaption, System.Globalization.CultureInfo.InvariantCulture);
return MsgBox(text, caption);
}
public static MsgBoxResult MsgBox(object objText)
{
return MsgBox(objText, null);
}
} // End Class Interaction
} // End Namespace WindowManager
来源：https://stackoverflow.com/questions/44174614/similar-method-to-messagebox-in-net-core