我在MVC项目中使用万无一失。 我似乎正在进行文本比较,以确定结束日期时间是否大于开始日期时间。
以下是模型:
public class TestModel
{
[Required]
[DataType(DataType.DateTime)]
public DateTime start { get; set; }
[Required]
[DataType(DataType.DateTime)]
[GreaterThan("start")]
public DateTime end { get; set; }
}
视图
@model WebApplication1.Models.TestModel
@{
ViewBag.Title = "Home Page";
}
@using (Html.BeginForm("Index2", "Home", FormMethod.Post, new { @class = "form-horizontal", role = "form" }))
{
@Html.AntiForgeryToken()
@Html.ValidationSummary("", new { @class = "text-danger" })
<div class="form-group">
@Html.LabelFor(m => m.start, new { @class = "col-md-2 control-label" })
<div class="col-md-10">
@Html.TextBoxFor(m => m.start, "{0:dd/MM/yyyy HH:mm}", new { @class = "form-control datetimepicker" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(m => m.end, new { @class = "col-md-2 control-label" })
<div class="col-md-10">
@Html.TextBoxFor(m => m.end, "{0:dd/MM/yyyy HH:mm}", new { @class = "form-control datetimepicker" })
</div>
</div>
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<input type="submit" value="Set password" class="btn btn-default" />
</div>
</div>
}
@section Scripts {
@Scripts.Render("~/bundles/jqueryval")
}
控制器
public ActionResult Index()
{
TestModel model = new TestModel();
// model.start = new DateTime(2016, 5, 31);
//model.end = new DateTime(2016, 8, 31);
model.start = DateTime.Now;
model.end = DateTime.Now.AddMinutes(30);
return View(model);
}
您可以下载我的项目试用: https://www.dropbox.com/s/pf0lkg297hq0974/WebApplication1.zip?dl=0
有两个问题: 1)当您开始日期11/07/2016 23:51和结束日期02/08/2016 00:21时,您会收到验证错误,因为它认为结束日期小于开始日期。这似乎是对我的文本比较。
2)此外,如果您取消注释掉两个model.start和model.end日期初始化语句,则在提交时会收到无效日期。
注意我正在使用bootstrap datetimepicker,但在文档准备好时将其初始化的位置注释掉了。我认为这与问题有关但似乎没有。最终我想让datetimepicker工作。
另请注意我在澳大利亚,因此日期格式为dd / mm / yyyy
答案 0 :(得分:1)
在您的HTML中发布到Index2将其更改为Index 将String转换回应用程序中GreaterThanAttribute的DateTime,然后比较
试试这个我测试了这个实现
控制器
public class TestController : Controller
{
// GET: Test
[HttpGet]
public ActionResult Index()
{
var model = new TestModel();
// model.start = new DateTime(2016, 5, 31);
//model.end = new DateTime(2016, 8, 31);
model.start = DateTime.Now;
model.end = DateTime.Now.AddMinutes(30);
return View(model);
}
[HttpPost]
public ActionResult Index(TestModel model)
{
if (ModelState.IsValid)
{
// model.start = new DateTime(2016, 5, 31);
//model.end = new DateTime(2016, 8, 31);
model.start = DateTime.Now;
model.end = DateTime.Now.AddMinutes(30);
return View("Index", model);
}
return View("Index", model);
}
}
您的TestModel
public class TestModel
{
[Required]
[DataType(DataType.DateTime)]
public DateTime start { get; set; }
[Required]
[DataType(DataType.DateTime)]
[GreaterThan("start", "Your Error Message")]
public DateTime end { get; set; }
}
您的GreaterThenAttribute.cs
public class GreaterThanAttribute : ValidationAttribute, IClientValidatable
{
public string otherPropertyName;
public GreaterThanAttribute()
{
}
public GreaterThanAttribute(string otherPropertyName, string errorMessage) : base(errorMessage)
{
this.otherPropertyName = otherPropertyName;
}
protected override ValidationResult IsValid
(object value, ValidationContext validationContext)
{
ValidationResult validationResult = ValidationResult.Success;
try
{
// Using reflection we can get a reference to the other date property, in this example the project start date
var containerType = validationContext.ObjectInstance.GetType();
var field = containerType.GetProperty(this.otherPropertyName);
var extensionValue = field.GetValue(validationContext.ObjectInstance, null);
var datatype = extensionValue.GetType();
//var otherPropertyInfo = validationContext.ObjectInstance.GetType().GetProperty(this.otherPropertyName);
if (field == null)
return new ValidationResult(String.Format("Unknown property: {0}.", otherPropertyName));
// Let's check that otherProperty is of type DateTime as we expect it to be
if ((field.PropertyType == typeof(DateTime) ||
(field.PropertyType.IsGenericType && field.PropertyType == typeof(Nullable<DateTime>))))
{
DateTime toValidate = (DateTime)value;
DateTime referenceProperty = (DateTime)field.GetValue(validationContext.ObjectInstance, null);
// if the end date is lower than the start date, than the validationResult will be set to false and return
// a properly formatted error message
if (toValidate.CompareTo(referenceProperty) < 1)
{
validationResult = new ValidationResult(ErrorMessageString);
}
}
else
{
validationResult = new ValidationResult("An error occurred while validating the property. OtherProperty is not of type DateTime");
}
}
catch (Exception ex)
{
// Do stuff, i.e. log the exception
// Let it go through the upper levels, something bad happened
throw ex;
}
return validationResult;
}
public IEnumerable<ModelClientValidationRule> GetClientValidationRules
(ModelMetadata metadata, ControllerContext context)
{
var rule = new ModelClientValidationRule
{
ErrorMessage = FormatErrorMessage(metadata.GetDisplayName()),
ValidationType = "isgreater",
};
rule.ValidationParameters.Add("otherproperty", otherPropertyName);
yield return rule;
}
}