private void button_send_Click(object sender, EventArgs e)
{
try
{
if (TextBox_send.Text == "")
{
MessageBox.Show("发送内容不能为空", "操作错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
string text = TextBox_send.Text;
while (is_sending)
{
}
;
is_sending = true;
TextBox_chat.SelectionAlignment = HorizontalAlignment.Right;
string whole = Aliases[0] + "(" + members[0] + ")" + " " + DateTime.Now.ToString() + "\n" + text + "\n";
TextBox_chat.AppendText(whole);
whole = text + "\n";
is_sending = false;
TextBox_send.Clear();
foreach (Socket sc in all_sockets)
{
AsynSend(sc, whole);
}
}
catch (Exception)
{
MessageBox.Show("连接失效", "网络错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
}
private void ChangeFontStyle(FontStyle style)
{
if (style != FontStyle.Bold && style != FontStyle.Italic &&
style != FontStyle.Underline)
{
throw new System.InvalidProgramException("字体格式错误");
}
RichTextBox tempRichTextBox = new RichTextBox(); //将要存放被选中文本的副本
int curRtbStart = TextBox_send.SelectionStart;
int len = TextBox_send.SelectionLength;
int tempRtbStart = 0;
Font font = TextBox_send.SelectionFont;
if (len <= 1 && font != null) //与上边的那段代码类似，功能相同
{
if (style == FontStyle.Bold && font.Bold ||
style == FontStyle.Italic && font.Italic ||
style == FontStyle.Underline && font.Underline)
{
TextBox_send.SelectionFont = new Font(font, font.Style ^ style);
}
else if (style == FontStyle.Bold && !font.Bold ||
style == FontStyle.Italic && !font.Italic ||
style == FontStyle.Underline && !font.Underline)
{
TextBox_send.SelectionFont = new Font(font, font.Style | style);
}
return;
}
tempRichTextBox.Rtf = TextBox_send.SelectedRtf;
tempRichTextBox.Select(len - 1, 1); //选中副本中的最后一个文字
//克隆被选中的文字Font，这个tempFont主要是用来判断
//最终被选中的文字是否要加粗、去粗、斜体、去斜、下划线、去下划线
Font tempFont = (Font)tempRichTextBox.SelectionFont.Clone();
//清空2和3
for (int i = 0; i < len; i++)
{
tempRichTextBox.Select(tempRtbStart + i, 1); //每次选中一个，逐个进行加粗或去粗
if (style == FontStyle.Bold && tempFont.Bold ||
style == FontStyle.Italic && tempFont.Italic ||
style == FontStyle.Underline && tempFont.Underline)
{
tempRichTextBox.SelectionFont =
new Font(tempRichTextBox.SelectionFont,
tempRichTextBox.SelectionFont.Style ^ style);
}
else if (style == FontStyle.Bold && !tempFont.Bold ||
style == FontStyle.Italic && !tempFont.Italic ||
style == FontStyle.Underline && !tempFont.Underline)
{
tempRichTextBox.SelectionFont =
new Font(tempRichTextBox.SelectionFont,
tempRichTextBox.SelectionFont.Style | style);
}
}
tempRichTextBox.Select(tempRtbStart, len);
TextBox_send.SelectedRtf = tempRichTextBox.SelectedRtf; //将设置格式后的副本拷贝给原型
TextBox_send.Select(curRtbStart, len);
}
// 清空输入栏
private void button_clear_Click(object sender, EventArgs e)
{
TextBox_send.Clear();
}