private void button1_Click(object sender, EventArgs e) { if (!string.IsNullOrEmpty(this.textBox1.Text.Trim()) && !string.IsNullOrEmpty(this.textBox2.Text.Trim())) { ButtonDisable(); client.CheckUserCompleted += client_CheckUserCompleted; client.CheckUserAsync(this.textBox1.Text.Trim(), this.textBox2.Text.Trim()); } else { MsgSet("请输入用户名密码"); } }