我如何发送短信超过160个字符

问题描述

下面是我的代码...但是该代码只能发送少于160个字符...我如何发送短信超过160个字符并且接收方仅接收一条消息??请帮助我..

below is my code...but the code can only send below than 160 character...how i can send sms more than 160 characters and the receiver receive as one message only??plss help me..

if (port.IsOpen)
   {
    port.WriteLine("AT+CMGF=1\r");
    Thread.Sleep(25);
    string str = "AT+CMGS=\"" + txtphno.Text.Trim() + "\"<cr>\r";
    port.WriteLine(str);
    Thread.Sleep(25);
    port.WriteLine(txtMess.Text);
    Thread.Sleep(25);
   }

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