ScaffoldColumn(bool value) vs
HiddenInput(DisplayValue = bool value) in MVC
In this
article, we will see what the use of ScaffoldColumn and HiddenInput. We will
also compare what are the key differences between these two attribute and what
scenario we should consider these attributes for usage. So, accordingly prior to
my articles on MVC we will just add these attributes and we will see the best that we can produce.
Let's
reduce the Confusion held between these using two attributes!!
So, now we
will elaborate on these two attributes in a practical manner:
So, let's consider Student.cs:
The Location Prop is
specified with [HiddenInput(DisplayValue=false)]
Student.cs
using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Web;
using
System.ComponentModel.DataAnnotations;
using
System.Web.Mvc;
namespace
MVC_Basic_Application.Models
{
public class Student
{
[Key]
public int
StudentId { get; set;
}
[Required(ErrorMessage
= "Please Enter FirstName")]
[StringLength(10,
ErrorMessage = "FirstName morethan 10 charcs")]
public string
FirstName { get; set;
}
[Required(ErrorMessage
= "Please Enter LastName")]
[StringLength(10,
ErrorMessage = "LastName morethan 10 charcs")]
public string
LastName { get; set;
}
[Range(5,
50, ErrorMessage = "Age Should Be Between 5 and 50")]
public int Age {
get; set; }
[HiddenInput(DisplayValue=false)]
[Required(ErrorMessage
= "Please Enter Location")]
[StringLength(10,
ErrorMessage = "Location morethan 10 charcs")]
public string
Location { get; set;
}
[Required(ErrorMessage
= "Email is required")]
[RegularExpression(@"^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}"
+
@"\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\"
+
@".)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$",
ErrorMessage = "Email appears to be invalid.")]
[UIHint("_Email")]
public string
Email { get; set;
}
[Required(ErrorMessage
= "Confirm Email is required")]
[RegularExpression(@"^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}"
+
@"\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\"
+
@".)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$",
ErrorMessage
= "Email appears to be invalid.")]
[UIHint("_Email")]
[Compare("Email",ErrorMessage="Email
Should Match")]
public string
ConfirmEmail { get; set; }
[Display(Name="Person
Gender")]
[Required(ErrorMessage="Gender
is Required")]
[StringLength(8,
ErrorMessage="Gender Too Long")]
public string
Gender { get; set;
}
}
} So, the
output looks like this where the values are hidden:
Index.cshtml
So, when we
want to create new values using Create.cshtml, the screen looks like below:
Now let's try the other attribute
which is ScaffoldColumn()
The Location Prop is
specified with [ScaffoldColumn(false)]
Student.cs
using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Web;
using
System.ComponentModel.DataAnnotations;
using
System.Web.Mvc;
namespace
MVC_Basic_Application.Models
{
public class Student
{
[Key]
public int
StudentId { get; set;
}
[Required(ErrorMessage
= "Please Enter FirstName")]
[StringLength(10,
ErrorMessage = "FirstName morethan 10 charcs")]
public string
FirstName { get; set;
}
[Required(ErrorMessage
= "Please Enter LastName")]
[StringLength(10,
ErrorMessage = "LastName morethan 10 charcs")]
public string
LastName { get; set;
} [Range(5,
50, ErrorMessage = "Age Should Be Between 5 and 50")]
public int Age {
get; set; }
[ScaffoldColumn(false)]
[Required(ErrorMessage
= "Please Enter Location")]
[StringLength(10,
ErrorMessage = "Location morethan 10 charcs")]
public string
Location { get; set;
} [Required(ErrorMessage
= "Email is required")]
[RegularExpression(@"^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}"
+
@"\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\"
+
@".)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$",
ErrorMessage = "Email appears to be invalid.")]
[UIHint("_Email")]
public string
Email { get; set;
}
[Required(ErrorMessage
= "Confirm Email is required")]
[RegularExpression(@"^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}"
+
@"\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\"
+
@".)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$",
ErrorMessage
= "Email appears to be invalid.")]
[UIHint("_Email")]
[Compare("Email",ErrorMessage="Email
Should Match")]
public string
ConfirmEmail { get; set; }
[Display(Name="Person
Gender")]
[Required(ErrorMessage="Gender
is Required")]
[StringLength(8,
ErrorMessage="Gender Too Long")]
public string
Gender { get; set;
}
}
} By Looking
at the Output of Index.cshtml now :
Index.cshtml
By Looking
at the Output of Create.cshtml now:
Create.cshtml
I hope this article is useful to you!!!!!!!!..Thanks for reading
this article..I look Forward for Comments and
Feedback....Vijay Prativadi.