Membership.FindUsersByName Method

Reference

Definition

Namespace:: System.Web.Security

Assembly:: System.Web.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Gets a collection of membership users where the user name contains the specified user name to match.

Overloads

FindUsersByName(String)	Gets a collection of membership users where the user name contains the specified user name to match.
FindUsersByName(String, Int32, Int32, Int32)	Gets a collection of membership users, in a page of data, where the user name contains the specified user name to match.

FindUsersByName(String)

Gets a collection of membership users where the user name contains the specified user name to match.

public:
 static System::Web::Security::MembershipUserCollection ^ FindUsersByName(System::String ^ usernameToMatch);

public static System.Web.Security.MembershipUserCollection FindUsersByName (string usernameToMatch);

static member FindUsersByName : string -> System.Web.Security.MembershipUserCollection

Public Shared Function FindUsersByName (usernameToMatch As String) As MembershipUserCollection

Parameters

usernameToMatch: String

The user name to search for.

Returns

MembershipUserCollection

A MembershipUserCollection that contains all users that match the usernameToMatch parameter.

Leading and trailing spaces are trimmed from the usernameToMatch parameter value.

Exceptions

ArgumentException

usernameToMatch is an empty string.

ArgumentNullException

usernameToMatch is null.

Examples

The following code example uses the FindUsersByName method to retrieve membership user information from the membership database based on user input and displays the results in pages of data.

Important

This example contains a text box that accepts user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview.

<%@ Page Language="C#" %>
<%@ Import Namespace="System.Web.Security" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

public void GoButton_OnClick(object sender, EventArgs args)
{
  UserGrid.DataSource = Membership.FindUsersByName(UsernameTextBox.Text);
  UserGrid.DataBind();
}

</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Sample: Find Users</title>
</head>
<body>

<form id="form1" runat="server">
  <h3>User List</h3>

  Username to Search for: 
    <asp:TextBox id="UsernameTextBox" runat="server" />
    <asp:Button id="GoButton" Text=" Go " OnClick="GoButton_OnClick" runat="server" /><br />

  <asp:DataGrid id="UserGrid" runat="server"
                CellPadding="2" CellSpacing="1"
                Gridlines="Both">
    <HeaderStyle BackColor="darkblue" ForeColor="white" />
  </asp:DataGrid>

</form>

</body>
</html>

<%@ Page Language="VB" %>
<%@ Import Namespace="System.Web.Security" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

Public Sub GoButton_OnClick(sender As Object, args As EventArgs)
  UserGrid.DataSource = Membership.FindUsersByName(UsernameTextBox.Text)
  UserGrid.DataBind()
End Sub

</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Sample: Find Users</title>
</head>
<body>

<form id="form1" runat="server">
  <h3>User List</h3>

  Username to Search for: 
    <asp:TextBox id="UsernameTextBox" runat="server" />
    <asp:Button id="GoButton" Text=" Go " OnClick="GoButton_OnClick" runat="server" /><br />

  <asp:DataGrid id="UserGrid" runat="server"
                CellPadding="2" CellSpacing="1"
                Gridlines="Both">
    <HeaderStyle BackColor="darkblue" ForeColor="white" />
  </asp:DataGrid>

</form>

</body>
</html>

Remarks

FindUsersByName returns a list of membership users where the user name matches the supplied usernameToMatch for the configured applicationName.

The SqlMembershipProvider performs its search using a LIKE clause against the usernameToMatch parameter. Any wildcards that are supported by SQL Server in LIKE clauses can be used in the usernameToMatch parameter value.

Leading and trailing spaces are trimmed from all parameter values.

Applies to

FindUsersByName(String, Int32, Int32, Int32)

Gets a collection of membership users, in a page of data, where the user name contains the specified user name to match.

public:
 static System::Web::Security::MembershipUserCollection ^ FindUsersByName(System::String ^ usernameToMatch, int pageIndex, int pageSize, [Runtime::InteropServices::Out] int % totalRecords);

public static System.Web.Security.MembershipUserCollection FindUsersByName (string usernameToMatch, int pageIndex, int pageSize, out int totalRecords);

static member FindUsersByName : string * int * int * int -> System.Web.Security.MembershipUserCollection

Public Shared Function FindUsersByName (usernameToMatch As String, pageIndex As Integer, pageSize As Integer, ByRef totalRecords As Integer) As MembershipUserCollection

Parameters

usernameToMatch: String

The user name to search for.

pageIndex: Int32

The index of the page of results to return. pageIndex is zero-based.

pageSize: Int32

The size of the page of results to return.

totalRecords: Int32

The total number of matched users.

Returns

MembershipUserCollection

A MembershipUserCollection that contains a page of pageSizeMembershipUser objects beginning at the page specified by pageIndex.

Leading and trailing spaces are trimmed from the usernameToMatch parameter value.

Exceptions

ArgumentException

usernameToMatch is an empty string.

-or-

pageIndex is less than zero.

-or-

pageSize is less than 1.

ArgumentNullException

usernameToMatch is null.

Examples

The following code example uses the FindUsersByName method to retrieve membership user information from the membership database based on user input and displays the results in pages of data.

Important

<%@ Page Language="C#" %>
<%@ Import Namespace="System.Web.Security" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

int pageSize = 5;
int totalUsers;
int totalPages;
int currentPage = 1;

private void GetUsers()
{
  UserGrid.DataSource = Membership.FindUsersByName(UsernameTextBox.Text, 
                          currentPage - 1, pageSize, out totalUsers);
  totalPages = ((totalUsers - 1) / pageSize) + 1;

  // Ensure that we do not navigate past the last page of users.

  if (currentPage > totalPages)
  {
    currentPage = totalPages;
    GetUsers();
    return;
  }

  UserGrid.DataBind();
  CurrentPageLabel.Text = currentPage.ToString();
  TotalPagesLabel.Text = totalPages.ToString();

  if (currentPage == totalPages)
    NextButton.Visible = false;
  else
    NextButton.Visible = true;

  if (currentPage == 1)
    PreviousButton.Visible = false;
  else
    PreviousButton.Visible = true;

  if (totalUsers <= 0)
    NavigationPanel.Visible = false;
  else
    NavigationPanel.Visible = true;
}

public void NextButton_OnClick(object sender, EventArgs args)
{
  currentPage = Convert.ToInt32(CurrentPageLabel.Text);
  currentPage++;
  GetUsers();
}

public void PreviousButton_OnClick(object sender, EventArgs args)
{
  currentPage = Convert.ToInt32(CurrentPageLabel.Text);
  currentPage--;
  GetUsers();
}

public void GoButton_OnClick(object sender, EventArgs args)
{
  currentPage = 1;
  GetUsers();
}

</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Sample: Find Users</title>
</head>
<body>

<form id="form1" runat="server">
  <h3>User List</h3>

  Username to Search for: 
    <asp:TextBox id="UsernameTextBox" runat="server" />
    <asp:Button id="GoButton" Text=" Go " OnClick="GoButton_OnClick" runat="server" /><br />

  <asp:Panel id="NavigationPanel" Visible="false" runat="server">
    <table border="0" cellpadding="3" cellspacing="3">
      <tr>
        <td style="width:100">Page <asp:Label id="CurrentPageLabel" runat="server" />
            of <asp:Label id="TotalPagesLabel" runat="server" /></td>
        <td style="width:60"><asp:LinkButton id="PreviousButton" Text="< Prev"
                            OnClick="PreviousButton_OnClick" runat="server" /></td>
        <td style="width:60"><asp:LinkButton id="NextButton" Text="Next >"
                            OnClick="NextButton_OnClick" runat="server" /></td>
      </tr>
    </table>
  </asp:Panel>

  <asp:DataGrid id="UserGrid" runat="server"
                CellPadding="2" CellSpacing="1"
                Gridlines="Both">
    <HeaderStyle BackColor="darkblue" ForeColor="white" />
  </asp:DataGrid>

</form>

</body>
</html>

<%@ Page Language="VB" %>
<%@ Import Namespace="System.Web.Security" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

Dim pageSize As Integer = 5
Dim totalUsers As Integer
Dim totalPages As Integer
Dim currentPage As Integer = 1

Private Sub GetUsers()
  UserGrid.DataSource = Membership.FindUsersByName(UsernameTextBox.Text, _
                          currentPage - 1, pageSize, totalUsers)

  totalPages = ((totalUsers - 1) \ pageSize) + 1

  ' Ensure that we do not navigate past the last page of users.

  If currentPage > totalPages Then
    currentPage = totalPages
    GetUsers()
    Return
  End If

  UserGrid.DataBind()
  CurrentPageLabel.Text = currentPage.ToString()
  TotalPagesLabel.Text = totalPages.ToString()

  If currentPage = totalPages Then
    NextButton.Visible = False
  Else
    NextButton.Visible = True
  End If

  If currentPage = 1 Then
    PreviousButton.Visible = False
  Else
    PreviousButton.Visible = True
  End If

  If totalUsers <= 0 Then
    NavigationPanel.Visible = False
  Else
    NavigationPanel.Visible = True
  End If
End Sub

Public Sub NextButton_OnClick(sender As Object, args As EventArgs)
  currentPage = Convert.ToInt32(CurrentPageLabel.Text)
  currentPage += 1
  GetUsers()
End Sub

Public Sub PreviousButton_OnClick(sender As Object, args As EventArgs)
  currentPage = Convert.ToInt32(CurrentPageLabel.Text)
  currentPage -= 1
  GetUsers()
End Sub

Public Sub GoButton_OnClick(sender As Object, args As EventArgs)
  currentPage = 1
  GetUsers()
End Sub

</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Sample: Find Users</title>
</head>
<body>

<form id="form1" runat="server">
  <h3>User List</h3>

  Username to Search for: 
    <asp:TextBox id="UsernameTextBox" runat="server" />
    <asp:Button id="GoButton" Text=" Go " OnClick="GoButton_OnClick" runat="server" /><br />

  <asp:Panel id="NavigationPanel" Visible="False" runat="server">
    <table border="0" cellpadding="3" cellspacing="3">
      <tr>
        <td style="width:100">Page <asp:Label id="CurrentPageLabel" runat="server" />
            of <asp:Label id="TotalPagesLabel" runat="server" /></td>
        <td style="width:60"><asp:LinkButton id="PreviousButton" Text="< Prev"
                            OnClick="PreviousButton_OnClick" runat="server" /></td>
        <td style="width:60"><asp:LinkButton id="NextButton" Text="Next >"
                            OnClick="NextButton_OnClick" runat="server" /></td>
      </tr>
    </table>
  </asp:Panel>

  <asp:DataGrid id="UserGrid" runat="server"
                CellPadding="2" CellSpacing="1"
                Gridlines="Both">
    <HeaderStyle BackColor="darkblue" ForeColor="white" />
  </asp:DataGrid>

</form>

</body>
</html>

Remarks

FindUsersByName returns a list of membership users where the user name matches the supplied usernameToMatch for the configured applicationName.

The results returned by FindUsersByName are constrained by the pageIndex and pageSize parameters. The pageSize parameter identifies the maximum number of MembershipUser objects to return in the MembershipUserCollection. The pageIndex parameter identifies which page of results to return, where 0 identifies the first page. The totalRecords parameter is an out parameter that is set to the total number of membership users that matched the usernameToMatch value. For example, if 13 users were found where usernameToMatch matched part of or the entire user name, and the pageIndex value was 1 with a pageSize of 5, the MembershipUserCollection returned would contain the sixth through the tenth users returned. totalRecords would be set to 13.

Applies to

Κοινή χρήση μέσω

Membership.FindUsersByName Method

Definition

Overloads

FindUsersByName(String)

Parameters

Returns

Exceptions

Examples

Remarks

See also

Applies to

FindUsersByName(String, Int32, Int32, Int32)

Parameters

Returns

Exceptions

Examples

Remarks

See also

Applies to

Πρόσθετοι πόροι