Email Validation Field
1. In Visual
Studio, create an Empty SharePoint Project. Give a suitable name for your
project and here its “CustomNewFileld”
2. Right-click
the project name in Solution Explorer and select Add | New Item
3. In the Add New
Item dialog box, select Visual C#
4. Select Class
from the template and give name as EmailField.csn
5. Coding EmailField.cs file.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.SharePoint;
using System.Text.RegularExpressions;
namespace CustomNewFileld
{
public class EmailField :
SPFieldText // Base Class
{
public EmailField(SPFieldCollection fields, string fieldName)
:
base(fields, fieldName)
{ // Default Constructor
}
public EmailField(SPFieldCollection fields, string typeName, string
displayName)
:
base(fields, typeName, displayName)
{ // Default Constructor
}
// If you need default value in
NewForm you can use the below method
/*public override string DefaultValue
{ get{ return "Test"; } }*/
·
GetValidatedString is used for data serialization logic and for field validation logic
that is specific to a custom field type to convert the field value object into
a validated, serialized string.
·
GetValidatedString method
check whether the field is required and, if it is the overridden method throws an SPFieldValidationException exception
when the value is null or an empty String.
·
SPFieldValidationException when the value is not
valid, causing an error message to appear beneath (under) the invalid field.
public override string GetValidatedString(object
value)
{
String Email = (String)value;
bool
result = isEmailID(Email);
if (Email == "")
throw new
SPFieldValidationException("Field should not
be empty");
else if (result != true)
{
throw new
SPFieldValidationException("Enter valid
Email");
}
else
{
return value.ToString();
}
}
public static bool isEmailID(string
inputEmail)
{
string strRegex = @"^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}"
+
@"\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\"
+
@".)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$";
Regex re = new Regex(strRegex);
if (re.IsMatch(inputEmail))
return (true);
else
return (false);
}
}
}
6. In Solution
Explorer, right-click the project name and select Add, then SharePoint Mapped
Folder
7. Use the tree
control that opens to map the folder to TEMPLATE\XML and click OK.
8. Right-click
the new XML folder (not the project name) in Solution Explorer and select Add |
New Item.
9. In the Add New
Item dialog box, select Visual C# and select an XML file; give the name as
Fldtypes_EmailField.xml.
<?xml version="1.0" encoding="utf-8" ?>
<FieldTypes>
<FieldType>
<Field Name="TypeName">Email</Field>
<Field Name="ParentType">Text</Field>
<Field Name="TypeDisplayName">Email</Field>
<Field Name="TypeShortDescription">Email Validation</Field>
<Field Name="UserCreatable">TRUE</Field>
<Field Name="ShowOnListCreate">TRUE</Field>
<Field Name="ShowOnSurveyCreate">TRUE</Field>
<Field Name="ShowOnDocumentLibraryCreate">TRUE</Field>
<Field Name="ShowOnColumnTemplateCreate">TRUE</Field>
<Field Name="FieldTypeClass"> CustomNewFileld.EmailField,$SharePoint.Project.AssemblyFullName$</Field>
</FieldType>
</FieldTypes>
CustomNewFileld
- Namespace name (Mostly the project name).
EmailField - .cs Filename which has the default constructors.
Email Validation – Name to be displayed in
creating a New Column.
10. Right-click
the References node in Solution Explorer, click Add Reference, and select
PresentationFramework.dll on the .NET tab in the Add Reference dialog box.
Click OK.
11. Finally Build
and Deploy solution.
