private void btnSetBold_Click(object sender, EventArgs e)
{
int start = this.richTextBox1.SelectionStart;
int length = this.richTextBox1.SelectionLength;
string original = this.richTextBox1.Text.Substring(start, length);
if (!string.IsNullOrEmpty(original))
{
string newValue = RTFUtility.Bold(original);
}
}
private void btnSetItalic_Click(object sender, EventArgs e)
{
string content = RTFUtility.Bold("斜体内容");
this.richTextBox1.AppendText(content);
}