200分 C# RichTextBox 高度自适应问题
解决200分全送
纠结2天了。。。。
动态创建RichTextBox，不要滚动条，高度随内容变化而变化
代码：
[DllImport("user32.dll", EntryPoint = "SendMessageA")]
private static extern int SendMessage(IntPtr hwnd, int wMsg, IntPtr wParam, string lParam);
RichTextBox richTextBox = null;
int sf = 0;
int pnlHight = 0;
void richTextBox_Resize(object sender, EventArgs e)
{
int EM_GETLINECOUNT = 0x00BA;//获取总行数的消息号
int lc = SendMessage(richTextBox.Handle, EM_GETLINECOUNT, IntPtr.Zero, "");
sf = richTextBox.Font.Height * (lc + 1) + richTextBox.Location.Y;
richTextBox.Height = sf-30;
richTextBox.Size = new System.Drawing.Size(912, richTextBox.Height);
}
private void createControls(string Message, string SendName, string SendTime, int replyId, int i)
{
Panel pnl = new Panel();
pnl.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
richTextBox = new RichTextBox();
richTextBox.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
richTextBox.Name = "richTextBox" + "_" + i;
richTextBox.TabIndex = 7;
richTextBox.Text = Message;
richTextBox.ReadOnly = true;
richTextBox.ScrollBars = RichTextBoxScrollBars.None;
richTextBox.Anchor = (AnchorStyles.Right | AnchorStyles.Left);
//得到RichTextBox高度
int EM_GETLINECOUNT = 0x00BA;//获取总行数的消息号
int lc = SendMessage(richTextBox.Handle, EM_GETLINECOUNT, IntPtr.Zero, "");
int sf = richTextBox.Font.Height * (lc + 1) + richTextBox.Location.Y;
richTextBox.Height = sf;
pnlHight = richTextBox.Height;
richTextBox.Resize += new EventHandler(richTextBox_Resize);
richTextBox.Location = new System.Drawing.Point(20, 30);
pnl.Controls.Add(richTextBox);
richTextBox.Text+="\r\n"+richTextBox.Location.X+"__Y:"+richTextBox.Location.Y;
richTextBox.Text += "\r\n" +"Heihgt:"+ richTextBox.Height;
pnl.Controls.Add(richTextBox);
pnl.Location = new System.Drawing.Point(0,size);
pnl.Name = "panel" + "_" + i;
pnl.Size = new System.Drawing.Size(1200, richTextBox.Height+40);
pnl.AutoScroll = true;
this.pnlMessage.Controls.Add(pnl);
size += richTextBox.Height + 40;
}
每个RichTextBox
20__Y:30 坐标，X：20 Y：30
Heihgt:28 高度：28
RichTextBox的坐标会上下变化，上图中第一个位置偏下了，第二个开始都是正常的，
这2个图RichTextBox的位置会随RichTextBox的高度变化而向下面偏移很多，不知道什么原因，
还请大家看下上面代码有什么问题，纠结2天了，，
或者有什么更好的办法提供下，，，谢谢大家了
[解决办法]
RichTextBox外面套一个panel，定位pannel，RichTextBox定位0,0
[解决办法]
试试这样吧，AppendText("内容"+"\r"),后面加上\r换行
private void richTextBox1_TextChanged(object sender, EventArgs e)
{
int lineheight = richTextBox1.Font.Height;
int linescount = richTextBox1.Lines.Length;
if (linescount * lineheight > richTextBox1.Height)
richTextBox1.Height = lineheight * linescount;
}
private void timer1_Tick(object sender, EventArgs e)//定时插入数据
{
richTextBox1.AppendText("你好大恢复啊哈赶快哈个卡号干哈是\r");
}