小编Gir*_*ffe的帖子

我无法在我的AvalonEdit TextEditor中插入一个字符.

void editor_TextArea_TextEntered(object sender, TextCompositionEventArgs e)
    {
        if (e.Text == "{" || e.Text == "(" || e.Text == "[" || e.Text == "\"" || e.Text == "\'")
        {
            switch (e.Text)
            {
                case "{":
                    int i = editor.TextArea.Caret.Offset;
                    editor.Text.Insert(i, "}");
                    break;
                case "(":
                    editor.Text.Insert(editor.CaretOffset, ")");
                    break;
                case "[":
                    editor.Text.Insert(editor.CaretOffset, "]");
                    break;
                case "\"":
                    editor.Text.Insert(editor.CaretOffset, "\"");
                    break;
                case "\'":
                    editor.Text.Insert(editor.CaretOffset, "\'");
                    break;
            }
        }
    }

我不知道为什么它不起作用.请帮我.

我想读取XML文件并保存InnerText-Strings,但它会因SystemNullReference错误而崩溃.我认为我读它的方式是错误的,但我不确定.

XML的文件:

<?xml version="1.0" encoding="Windows-1252" standalone="no"?>
<schema>
  <Hintergrund>#FFFFFFFF</Hintergrund>
  <Zahlen>#FFFFFFFF</Zahlen>
  <Text>#FFFFFFFF</Text>
  <Zeichenketten>#FFFFFFFF</Zeichenketten>
  <Tags>#FF000000</Tags>
  <Direktiven>#FF000000</Direktiven>
  <Ausdruecke>#FF000000</Ausdruecke>
  <Initialisierer>#FF000000</Initialisierer>
  <Modifizierer>#FF000000</Modifizierer>
  <Booleanische>#FF000000</Booleanische>
  <Operator>#FF000000</Operator>
  <Kommentare>#FF000000</Kommentare>
</schema>

读:

foreach (XmlNode node in doc.SelectNodes("/schema/*"))
{
    switch (node.Name)
    {
        case "Hintergrund":
            colorBG = (Color)ColorConverter.ConvertFromString(node["Hintergrund"].InnerText);
            break;
        case "Zahlen":
            colorNumbers = (Color)ColorConverter.ConvertFromString(node["Zahlen"].InnerText);
            break;
        case "Text":
            colorText = (Color)ColorConverter.ConvertFromString(node["Text"].InnerText);
            break;
        case "Zeichenketten":
            colorStrings = (Color)ColorConverter.ConvertFromString(node["Zeichenketten"].InnerText);
            break;
        case "Tags":
            colorTags = (Color)ColorConverter.ConvertFromString(node["Tags"].InnerText);
            break;
        case "Direktiven":
            colorDirectives = (Color)ColorConverter.ConvertFromString(node["Direktiven"].InnerText);
            break;
        case "Ausdruecke":
            colorStatements = (Color)ColorConverter.ConvertFromString(node["Ausdruecke"].InnerText);
            break;
        case "Initialisierer":
            colorInitial = (Color)ColorConverter.ConvertFromString(node["Initialisierer"].InnerText);
            break;
        case "Modifizierer": …