Razor code EditorFor showing '�' as default?

问题

In my Form, there is a textbox, in razor code using EditorFor and the type given for this is Char. But it always shows a '�' as default, what's that mean? is this because of char type?

please look at the picture

回答1:

This � is the invalid unicode code point glyph. It is what you will see in most browsers when they encounter the null character '\0' (U+0000). This happens to be the default value of the .NET char data type.

Three workarounds:

1. substitute a valid char for the default, for example a space: c == default(char) ? ' ' : c
2. add logic to hide the EditorFor or LabelFor when the value is default(char)
3. change the data type to System.String, which leads to correct rendition in both cases null and String.Empty

来源：https://stackoverflow.com/questions/61339819/razor-code-editorfor-showing-as-default