[英].NETCore and how to use AJAX Post Request to update SQL database
我正在开发一个 .NETCore 应用程序,我想在单击按钮时使用 jQuery AJAX 调用后更新我的 SQL 数据库。 我尝试了 ajax 调用的几种不同变体,但没有任何效果。 我收到 404 或 400 错误。 我不确定我做错了什么。 下面是我的 ajax 调用的代码
$("#addMilestoneBtn").on('click', function (e) {
e.preventDefault();
var milestoneDetails = {};
var date = $("#milestoneDate").val();
milestoneDetails.MilestoneName = $("#milestoneText").val();
milestoneDetails.Date = new Date(date);
milestoneDetails.Date.setHours(0, 0, 0, 0);
milestoneDetails.ProjectId = Number($("#projectId").val());
var jsonData = JSON.stringify(milestoneDetails);
var url = '@Url.Action("AddMilestone","HomeController")';
$.ajax({
type: "POST",
url: url,
data: jsonData,
contentType: "application/json; charset=utf-8",
dataType: "json",
success: OnSuccess,
error: OnErrorCall
});
function OnSuccess(response) {
var result = response.d;
if (result == "success") {
alert("Milestone Added Sucessfully")
//$("#").html("Milestone addded successfully").css("color", "green");
buildMilestoneTable();
}
$("#milestoneDate").val("");
$("#milestoneText").val("");
}
function OnErrorCall(response) {
//$("#").html("An Error has occurred. Please Try Again!").css("color", "red");
console.log(response);
}
return false;
});
对于 ajax 调用,我尝试使用 @Url.Action 创建 url。 我也尝试过使用 controller 和这样的操作名称:'/HomeController/AddMilestone'。
这是我的 Controller 的代码:
[HttpPost]
public bool AddMilestone(HomeViewModel obj)
{
//Create new Milestone
obj.Milestone.Date = DateTime.Today;
obj.Milestone.MilestoneName = obj.Milestone.MilestoneName;
obj.Milestone.ProjectId = obj.Project.Id;
_db.Milestones.Add(obj.Milestone);
_db.SaveChanges();
return true;
}
这是我的 HomeViewModel 的代码:
public class HomeViewModel
{
public Project Project{ get; set; }
public IEnumerable<Project> Projects { get; set; }
public IEnumerable<SelectListItem> TeamDropDown { get; set; }
public IEnumerable<SelectListItem> GroupDropDown { get; set; }
public IEnumerable<SelectListItem> StatusDropDown { get; set; }
public IEnumerable<SelectListItem> NotesDropDown { get; set; }
public IEnumerable<SelectListItem> NetworkDropDown { get; set; }
public IEnumerable<SelectListItem> AssigneeDropDown { get; set; }
public GTMNote GTMNote { get; set; }
public SECNote SECNote { get; set; }
public OPSNote OPSNote { get; set; }
public LCNote LCNote { get; set; }
public CTRNote CTRNote { get; set; }
public Update Update { get; set; }
public Milestone Milestone { get; set; }
public NextStep NextStep { get; set; }
}
这是我表格的 HTML 部分:
<div class="tab-pane" id="milestones" role="tabpanel">
<br />
<fieldset class="form-group">
<input class="form-control col-2" asp-for="Milestone.Date" type="text" value="@ViewBag.DateNoTime" id="milestoneDate">
</fieldset>
<fieldset class="form-group">
<input class="form-control" type="text" asp-for="Milestone.MilestoneName" oninput="charLimit();" id="milestoneText" />
<p>
<small class="text-danger" id="milestoneValidation" style="padding-top: 10px; display: none;">Please provide milestone text.</small>
</p>
</fieldset>
<br />
<a class="btn btn-primary" id="addMilestoneBtn">Add Milestone</a>
<br />
<div id="milestoneTable"></div>
</div>
里程碑 Class:
public class Milestone
{
[Key]
public int Id { get; set; }
[DisplayName("")]
public string MilestoneName { get; set; }
[DisplayName("Milestone Date")]
public DateTime Date { get; set; }
//Forgein Keys
public int ProjectId { get; set; }
[ForeignKey("ProjectId")]
public Project Project { get; set; }
}
预先感谢您的帮助!
尝试发送此数据
var milestoneDetails = {
MilestoneName : $("#milestoneText").val(),
ProjectId :$("#projectId".val()
};
var jsonData = JSON.stringify(milestoneDetails);
var url = '@Url.Action("AddMilestone","HomeController")';
// or try , if you get 404
var url = '/Home/AddMilestone';
并使用此操作,添加 [FromBody] 因为您使用的是“application/json” contentType
[HttpPost("~/Home/AddMilestone")]
public bool AddMilestone([FromBody] Milestone mileStone)
{
mileStone.Date = DateTime.Today;
_db.Milestones.Add(mileStone);
_db.SaveChanges();
return true;
}
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