private void button1_Click(object sender, EventArgs e) { string loginUrl = this.textBox1.Text; if (string.IsNullOrEmpty(loginUrl)) { MessageBox.Show("请填写URL"); return; } string sendcontent = this.textBox3.Text; string returnMessage = HttpUtility.CreatePostTCPResponse(loginUrl, sendcontent, null, Encoding.UTF8); this.textBox2.Text = returnMessage; }