WebBrowser使用POST提交数据示例

public void Navigate(string urlString, string targetFrameName, byte[] postData, string additionalHeaders);
public void Navigate(Uri url, string targetFrameName, byte[] postData, string additionalHeaders);

webBrowser1.Navigate("http://www.mzwu.com/", "", Encoding.UTF8.GetBytes("domain=mzwu.com"), "Content-Type:application/x-www-form-urlencoded");