在获取textbox的时候 如果要转换为int的 可能会出错 如果为空

实例化发送配置信息
emailConfigEntity.SendNumEveryTime = Convert.ToInt32(this.textBoxSendNumEveryTime.Text.Trim() == "" ? "0" : this.textBoxSendNumEveryTime.Text.Trim());
emailConfigEntity.SendTimes = Convert.ToInt32(this.textBoxSendTimes.Text.Trim() == "" ? "0" : this.textBoxSendTimes.Text.Trim());
emailConfigEntity.SleepTimes = Convert.ToInt32(this.textBoxSleepTimes.Text.Trim() == "" ? "0" : this.textBoxSleepTimes.Text.Trim());