我@Html.HiddenFor(model => model.timestamp)在我的 asp.net mvc 视图中添加了一个。但提交视图后，我收到以下错误
The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or a non-white space character among the padding characters.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.FormatException: The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or a non-white space character among the padding characters.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
那么可能是什么问题，请记住，我采用了相同的方法来添加@Html.HiddenFor(model => model.timestamp)代表其他模型的其他视图，并且它们运行良好。导致错误的整个视图如下所示：-
@model Medical.Models.Patient
@{
ViewBag.Title = "Edit";
}
<h2>Edit</h2>
@section scripts{
<script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script>}
@using (Html.BeginForm()) {
@Html.ValidationSummary(true)
<fieldset>
<legend>Patient</legend>
@Html.HiddenFor(model => model.PatientID)
@Html.HiddenFor(model => model.timestamp)
<div class="editor-label">
@Html.LabelFor(model => model.FirstName)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.FirstName)
@Html.ValidationMessageFor(model => model.FirstName)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.FatherName)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.FatherName)
@Html.ValidationMessageFor(model => model.FatherName)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.ThirdName)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.ThirdName)
@Html.ValidationMessageFor(model => model.ThirdName)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.FamilyName)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.FamilyName)
@Html.ValidationMessageFor(model => model.FamilyName)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.DateOfBirth)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.DateOfBirth)
@Html.ValidationMessageFor(model => model.DateOfBirth)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.NationalityID, "Country")
</div>
<div class="editor-field">
@Html.DropDownList("NationalityID", String.Empty)
@Html.ValidationMessageFor(model => model.NationalityID)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.GenderID, "Gender")
</div>
<div class="editor-field">
@Html.DropDownList("GenderID", String.Empty)
@Html.ValidationMessageFor(model => model.GenderID)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Weight)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Weight)
@Html.ValidationMessageFor(model => model.Weight)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Height)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Height)
@Html.ValidationMessageFor(model => model.Height)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.RegisterDate)
</div>
<div class="editor-field">
@Html.TextBoxFor(model => model.RegisterDate , new { value = "FL", disabled = "disabled" })
@Html.ValidationMessageFor(model => model.RegisterDate)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Telephone)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Telephone)
@Html.ValidationMessageFor(model => model.Telephone)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Email)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Email)
@Html.ValidationMessageFor(model => model.Email)
</div>
@Html.HiddenFor(model => model.timestamp)
<p>
@Html.HiddenFor(model => model.PatientID)
@Html.HiddenFor(model => model.RegisterDate)
<input type="submit" value="Save" />
</p>
</fieldset>
}
<div>
@Html.ActionLink("Back to List", "Index")
</div>
：：： - 更新 - ：：：
这是模型部分类：-
namespace Medical.Models
{
[MetadataType(typeof(Patient_Validation))]
[Bind(Exclude = "Country,Gender,Visits")]
public partial class Patient
{}}
和模型验证：-
public class Patient_Validation
{
[DisplayFormat(DataFormatString = "{0:f}", ApplyFormatInEditMode = true)]
[Display(Name = "Register Date")]
public double RegisterDate { get; set; }
[Timestamp]
public Byte[] timestamp { get; set; }
//[DisplayFormat(DataFormatString = "{0:d}", ApplyFormatInEditMode = true)]
[DisplayFormat(DataFormatString = "{0:f}", ApplyFormatInEditMode = true)]
[Display(Name = "Date Of Birth")]
public double DateOfBirth { get; set; }
[StringLength(50,MinimumLength=2)]
[Display(Name = "First Name")]
[MaxWords(10)]
public string FirstName { get; set; }
[StringLength(50, MinimumLength = 2)]
[Display(Name = "Father Name")]
[MaxWords(10)]
public string FatherName { get; set;}
[StringLength(50,MinimumLength=2)]
[Display(Name = "Third Name")]
[MaxWords(10)]
public string ThirdName { get; set; }
[StringLength(50,MinimumLength=2)]
[Display(Name = "Family Name")]
[MaxWords(10)]
public string FamilyName { get; set;
[Required(ErrorMessage= "Gender is Required")]
[Display(Name = "Gender")]
public int GenderID { get; set; }
[RegularExpression(@"[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}",ErrorMessage="Please Insert Valid Email Address")]
public string Email { get; set; }