控制器代码:

public string ValidateCarID(string carid)//这里接收ajax传递过来的值

{ string result; Car car = db.Car.Find(carid);//查找到传递过来的carid的实体对象 if(car==null)//如果没有找到该实体对象，返回false { result = "false"; //没有找到 } else { result = "true"; } return result; }

 

ajax部分:

<script type="text/javascript">

$(document).ready(function () { $("#carID").change(function () {//carID输入框改变事件 var caridNode = $("#carID").val();//获取CarID的值 $.ajax({ type: "post", url: "../../Cars/ValidateCarID?carid=" + caridNode,//将CarID传到控制器，在控制器进行查询 dataType:"text", success: function (result) { if (result == "true") { $.ligerDialog.error("该车辆已注册"); }

}

}); }); }); </script>

视图控件部分:

<tr>

<td> @Html.LabelFor(model => model.CarID, htmlAttributes: new { @class = "control-label col-md-2" }) </td> <td> @Html.EditorFor(model => model.CarID, new { htmlAttributes = new { @class = "form-control",id="carID"} })//这个是需要判断的控件 @Html.ValidationMessageFor(model => model.CarID, "", new { @class = "text-danger" }) </td> </tr>