是否有任何方法可以在.NET核心中显示像MessageBox.Show这样的弹出消息？
不，.NET Core专注于Web，Messagebox是一个winforms的东西。并且.NET Core中没有winforms支持。
编辑：
一个或多或少的官方回答“为什么没有Microsoft.UI.WinForms .Net Core包”
我的团队（Microsoft .NET团队）专注于.NET Core作为云和Web框架。我们知道人们希望我们为.NET Core构建其他应用程序类型。目前，我们仍然专注。许多其他开发人员希望我们专注于我们从.NET Core开始的工作，这是我们的意图。
廉价替换的问题之一是，Linux（或Mac）上没有相同的功能。
因此，您可以使用许多pinvokes和结构编写自己的，也可以使用“notify-send”命令，这将在Linux上打开“通知气泡”。
WindowManager.MsgBoxResult result = WindowManager.Interaction
.MsgBox("Message", "Title", MsgBoxStyle.OkCancel);
这是我的实现：
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