如何使用 C# 中的 HttpWebRequest 类发送文本

Question

我在 C# 中有这个函数，每 1 分钟通过计时器调用一次...

private void timer1_Tick(object sender, EventArgs e)

{
    string strServer = "hhttp://www.mydomain.net/save.php";
    try {
        HttpWebRequest reqFP = (HttpWebRequest)HttpWebRequest.Create(strServer);
        HttpWebResponse rspFP = (HttpWebResponse)reqFP.GetResponse();
        if (rspFP.StatusCode == HttpStatusCode.OK) { // ther is an internet connection
            //send the text stored in 'writeUp' string variable to the url via 'POST' methode
            rspFP.Close(); //is good to open and close the connection every minute
        }
    }
    catch (WebException) {
        //I don't know why to use try/catch... but I just don't want any errors to be poped up...
    }
    writeUp = "";
}

编写这段代码是为了执行下一步：

检查是否有到该站点的连接...
如果有，那么...将文本从“writeup”字符串变量发送到存储在站点根目录中的“save.php”文件...
其中 writeup 字符串将使用“POST”方法（而不是“Get”方法）发布到 php 文件...
所以我可以通过变量 $_POST['writeup'] 接受 PHP 中的文本
这样我就可以根据需要处理文本...

更多问题... 最好每分钟打开和关闭 httprequest...或者在互联网连接可用时始终保持打开状态...

Answer 1

private void timer1_Tick(object sender, EventArgs e)    
{
    string strServer = "hhttp://www.mydomain.net/save.php";
    try 
    {
        var reqFP = (HttpWebRequest)HttpWebRequest.Create(strServer);

        reqFP.Method = "POST";
        reqFP.ContentType = "application/x-www-form-urlencoded";

        reqFP.ContentLength = writeup.Length;

        /*var rspFP = (HttpWebResponse)reqFP.GetResponse();
        if (rspFP.StatusCode == HttpStatusCode.OK) 
        {*/
            //WRITE STRING TO STREAM HERE
            using (var sw = new StreamWriter(reqFP.GetRequestStream(), Encoding.ASCII))
            {
                sw.Write(writeup);
            }   

            rspFP.Close(); //is good to open and close the connection every minute
        /*}*/       
    }
    catch (WebException) {
        //I don't know why to use try/catch... 
        //but I just don't want any errors to be poped up...
    }
    writeUp = "";
}