如何根据Alt代码获取对应字符？代码实现方案咨询

Hey there! Let's get that Alt+1 character (the one that shows up as 鈽�) into your string and display it in the RichTextBox like you want. Here's a straightforward implementation for the AltCodes helper class you're looking for:

Implementation Code #

public static class AltCodes
{
    // Retrieves the character corresponding to the given Alt code number
    public static char GetAltCodeCharacter(int altCode)
    {
        // Alt codes 0-255 map directly to ASCII values
        // Alt+1 corresponds to the ASCII control character SOH (Start of Header)
        return (char)altCode;
    }
}

// Usage in your form code
private void LoadSmileyCharacter()
{
    string smiley = AltCodes.GetAltCodeCharacter(1).ToString();
    // This will display the placeholder character (鈽�) since SOH is a non-printable control character
    richTextBoxHappy.Text = smiley;
}

A Quick Note #

That 鈽� placeholder appears because the character you're fetching (ASCII value 1, SOH) is a non-printable control character—most system fonts don't have a visible glyph for it. But this code correctly retrieves the exact character generated by pressing Alt+1, which is why you see that placeholder in your RichTextBox.

内容的提问来源于stack exchange，提问作者Shiasu-sama