How to prevent electron window closing when click close and ask confirmation #664

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claunia · 2026-01-29T16:45:29Z

claunia commented

2026-01-29 16:45:29 +00:00

Originally created by @soundararajans on GitHub (May 13, 2021).

Originally assigned to: @GregorBiswanger on GitHub.

How to prevent electron window closing when click close and ask confirmation

Node Version: V 14.17.0
Electron.Net Nuget: 11.5.1

Target: Win
.Net: Net5.0

I tried the below code. But it's not working and window is closing always without asking confirmation.

`
window.OnClose += () =>
{
MessageBoxOptions options = new MessageBoxOptions("Changes you made may not be saved");
options.Type = MessageBoxType.question;
options.Buttons = new string[] { "No", "Yes" };
options.DefaultId = 1;
options.CancelId = 0;

            if (Electron.Dialog.ShowMessageBoxAsync(options).Result.Response == 1)
            {
               
            }
        };

`

Originally created by @soundararajans on GitHub (May 13, 2021). Originally assigned to: @GregorBiswanger on GitHub.  How to prevent electron window closing when click close and ask confirmation   * **Node Version**: V 14.17.0 * **Electron.Net Nuget**: 11.5.1   * **Target**: Win * **.Net**: Net5.0   I tried the below code. But it's not working and window is closing always without asking confirmation. ` window.OnClose += () => { MessageBoxOptions options = new MessageBoxOptions("Changes you made may not be saved"); options.Type = MessageBoxType.question; options.Buttons = new string[] { "No", "Yes" }; options.DefaultId = 1; options.CancelId = 0; if (Electron.Dialog.ShowMessageBoxAsync(options).Result.Response == 1) { } }; `

claunia added the bug label 2026-01-29 16:45:29 +00:00

claunia referenced this issue

2026-01-29 16:58:54 +00:00

[PR #668] [MERGED] Fix for 664, open for comment. #1248

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Reference: starred/Electron.NET#664