这是我的ajax / jquery代码，它将电话字段的值发送给控制器
<script type="text/javascript">
debugger;
$(document).ready(function () {
//Dropdownlist Selectedchange event
$("#button").click(function () {
debugger;
alert("phonechanged");
$.ajax({
type: "POST",
dataType: 'json',
contentType: 'application/json',
url: '@Url.Action("CheckPhone")',
//data: { phone: $("#phone").val() },
data: JSON.stringify({ phone: $("#phone").val() }),
success: function (data) {
debugger;
var obj = JSON.parse(data);
$("#firstName").val(obj.firstName);
},
error: function (ex) {
debugger;
alert('Failed to retrieve customer.' + ex);
}
});
return false;
})
});
</script>
这是我的控制器方法，应该返回客户（如果有），然后让ajax更改field的值。我的代码无法正常工作。如果没有客户拥有该电话号码，我也不知道如何检查空值。
[HttpPost]
public JsonResult CheckPhone(string phone)
{
Customer cm = new Customer();
bool check = false;
Leads_Management_SystemEntities lmsEntities = new Leads_Management_SystemEntities();
cm = lmsEntities.Customers.FirstOrDefault(x => x.phoneNum1 == phone || x.phoneNum2 == phone || x.phoneNum3 == phone);
string value = string.Empty;
value = JsonConvert.SerializeObject(cm, Formatting.Indented, new JsonSerializerSettings
{
ReferenceLoopHandling = ReferenceLoopHandling.Ignore
});
return Json(value);
}
剃刀代码
<div class="form-group">
@Html.LabelFor(model => model.firstName, new { @class = "control-label col-md-2"})
<div class="col-md-10">
@Html.EditorFor(model => model.firstName, new { id = "firstName" })
@Html.ValidationMessageFor(model => model.firstName)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.email, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.email)
@Html.ValidationMessageFor(model => model.email)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.city, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.city)
@Html.ValidationMessageFor(model => model.city)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.country, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.country)
@Html.ValidationMessageFor(model => model.country)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.phoneNum1, new { @class = "control-label col-md-2"})
<div class="col-md-10">
@Html.EditorFor(model => model.phoneNum1, new { id = "phone" })
@Html.ValidationMessageFor(model => model.phoneNum1)
</div>
</div>
<input type="submit" value="submit" id="button" />
<div class="form-group">
@Html.LabelFor(model => model.phoneNum2, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.phoneNum2)
@Html.ValidationMessageFor(model => model.phoneNum2)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.phoneNum3, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.phoneNum3)
@Html.ValidationMessageFor(model => model.phoneNum3)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.propertyOwned, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.propertyOwned)
@Html.ValidationMessageFor(model => model.propertyOwned)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.address, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.address)
@Html.ValidationMessageFor(model => model.address)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.CNIC, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.CNIC)
@Html.ValidationMessageFor(model => model.CNIC)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.lastName, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.lastName)
@Html.ValidationMessageFor(model => model.lastName)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.budgetTo, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.budgetTo)
@Html.ValidationMessageFor(model => model.budgetTo)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.budgetFrom, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.budgetFrom)
@Html.ValidationMessageFor(model => model.budgetFrom)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.leadScoreId, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.DropDownListFor(model => model.leadScoreId, (IEnumerable<SelectListItem>)ViewBag.lsList, "Select leadscore")
@*@Html.EditorFor(model => model.leadScoreId)*@
@Html.ValidationMessageFor(model => model.leadScoreId)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.plotSize, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.plotSize)
@Html.ValidationMessageFor(model => model.plotSize)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.statusId, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.DropDownListFor(model => model.statusId, (IEnumerable<SelectListItem>)ViewBag.statusList, "Select status")
@*@Html.EditorFor(model => model.statusId)*@
@Html.ValidationMessageFor(model => model.statusId)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.uniqueHandle, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.uniqueHandle)
@Html.ValidationMessageFor(model => model.uniqueHandle)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.plotTypeId, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.DropDownListFor(model => model.plotTypeId, (IEnumerable<SelectListItem>)ViewBag.ptList, "Select plotType")
@*@Html.EditorFor(model => model.plotTypeId)*@
@Html.ValidationMessageFor(model => model.plotTypeId)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Block, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.Block)
@Html.ValidationMessageFor(model => model.Block)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.commentsDetails, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.commentsDetails)
@Html.ValidationMessageFor(model => model.commentsDetails)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.typeId, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.DropDownListFor(model => model.typeId, (IEnumerable<SelectListItem>)ViewBag.stList, "Select sourcetype")
@*@Html.EditorFor(model => model.typeId)*@
@Html.ValidationMessageFor(model => model.typeId)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.sourceTime, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.sourceTime)
@Html.ValidationMessageFor(model => model.sourceTime)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.commentsSource, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.EditorFor(model => model.commentsSource)
@Html.ValidationMessageFor(model => model.commentsSource)
</div>
</div>
@*this form group wasnot auto generated*@
<div class="form-group">
@Html.LabelFor(model => model.tags, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.ListBoxFor(model => model.tags, (MultiSelectList)(ViewData["tags"]) as SelectList)
@*@Html.EditorFor(model => model.tags)*@
@Html.ValidationMessageFor(model => model.tags)
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.features, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.ListBoxFor(model => model.features, (MultiSelectList)(ViewData["features"]) as SelectList)
@*@Html.EditorFor(model => model.features)*@
@Html.ValidationMessageFor(model => model.features)
</div>
</div>
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<input type="submit" value="Create" class="btn btn-default" />
</div>
</div>
</div>
}
答案 0 :(得分：-1)
代码有两个问题。让我们从动作开始：
lmsEntities未被处置cm被序列化两次-一个通过JsonConvert.SerializeObject，另一个通过Json。这会在AJAX成功事件中强制进行不必要的JSON.parse调用。总体来说，它看起来应该像这样：
[HttpPost]
public JsonResult CheckPhone(string phone)
{
using (var lmsEntities = new Leads_Management_SystemEntities())
{
var customer = lmsEntities.Customers
.Where(x => x.phoneNum1 == phone || x.phoneNum2 == phone || x.phoneNum3 == phone)
.Select(x => new
{
// select whatever needed
x.firstName,
x.LastName
})
.FirstOrDefault();
return Json(customer);
}
}
然后，AJAX正常运行所需的唯一更新如下：
$.ajax({
type: "POST",
dataType: 'json',
contentType: 'application/json',
url: '@Url.Action("CheckPhone")',
//data: { phone: $("#phone").val() },
data: $("#phone").val(),
success: function (data) {
debugger;
//if nothing was retrieved from the server
if (!data)
{
return;
}
// no need for the JSON.parse call, use data directly
$("#firstName").val(data.firstName);
},
error: function (ex) {
debugger;
alert('Failed to retrieve customer.' + ex);
}
});