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MembershipProvider.GetUserNameByEmail Method

Gets the user name associated with the specified e-mail address.

Namespace:  System.Web.Security
Assembly:  System.Web.ApplicationServices (in System.Web.ApplicationServices.dll)
public abstract string GetUserNameByEmail(
	string email
)

Parameters

email
Type: System.String

The e-mail address to search for.

Return Value

Type: System.String
The user name associated with the specified e-mail address. If no match is found, return null.

Takes, as input, an e-mail address and returns the first user name from the data source where the e-mail address matches the supplied email parameter value.

If no user name is found with a matching e-mail address, null is returned.

If multiple user names are found that match a particular e-mail address, only the first user name found should be returned. You can implement a custom mechanism for ensuring a unique e-mail address for each user name such as the RequiresUniqueEmail property supported by the SqlMembershipProvider provider.

For an example of a MembershipProvider implementation, see Implementing a Profile Provider.

.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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