Question

我想制作一个框，我可以在其中显示某些文字左侧导向和某些文字在C＃中正确定位。例如，

代码

If (msg from admin)
   richTextBox.Append(rightAligned(msg))
else
   richTextBox.Append(leftAligned(msg))

我尝试了SelectionAlignment的{{1}}功能，但它对框中的所有文字都应用了特定的格式。我怎样才能达到预期的效果？任何帮助将不胜感激。

Answer 1

您可以将Environment.Newline和RichTextBox.SelectionAlignment用于richTextBox。

例如：

if (msg from admin) {
    richTextBox.AppendText(Environment.NewLine + msg);
    richTextBox.SelectionAlignment = HorizontalAlignment.Right;
} else {
    richTextBox.AppendText(Environment.NewLine + msg);
    richTextBox.SelectionAlignment = HorizontalAlignment.Left;
}

Answer 2

这也可以这样做:)

 If (...)
    {
       textBox1.TextAlign = HorizontalAlignment.Left;
       textBox1.Text = " Blah Blah ";
    }
else
   {
       textBox1.TextAlign = HorizontalAlignment.Right;
       textBox1.Text = " Blah Blah Right";
   }

Answer 3

要设置追加文本的对齐方式，您只需选择附加文本，然后使用SelectionAlignment属性：

    public static void AppendLineAndAlignText(this RichTextBox richTextBox, string text, HorizontalAlignment alignment)
    {
        if (string.IsNullOrEmpty(text))
            return;
        var index = richTextBox.Lines.Length;                      // Get the initial number of lines.
        richTextBox.AppendText("\n" + text);                       // Append a newline, and the text (which might also contain newlines).
        var start = richTextBox.GetFirstCharIndexFromLine(index);  // Get the 1st char index of the appended text
        var length = richTextBox.Text.Length;     
        richTextBox.Select(start, length - index);                 // Select from there to the end
        richTextBox.SelectionAlignment = alignment;                // Set the alignment of the selection.
        richTextBox.DeselectAll();
    }

经过测试后，只要SelectionAlignment字符串不包含换行符，只需设置text即可，但如果有嵌入的换行符，则只有最后一行符号才会对齐正确。

    public static void AppendLineAndAlignText(this RichTextBox richTextBox, string text, HorizontalAlignment alignment)
    {
        // This only works if "text" contains no newline characters.
        if (string.IsNullOrEmpty(text))
            return;
        richTextBox.AppendText("\n" + text);                       // Append a newline, and the text (which must not also contain newlines).
        richTextBox.SelectionAlignment = alignment;                // Set the alignment of the selection.
    }

Answer 4

您想使用RichTextBox.SelectionAlignment。从another SO answer无耻地偷走。

看来您必须附加文本，选择它然后更改SelectionAlignment。

右对齐和左对齐richtextbox c＃

4 个答案: