RoleProvider.FindUsersInRole(String, String) 方法

定义

命名空间:

System.Web.Security

程序集:

System.Web.ApplicationServices.dll

获取属于某个角色且与指定的用户名相匹配的用户名的数组。

public:
 abstract cli::array <System::String ^> ^ FindUsersInRole(System::String ^ roleName, System::String ^ usernameToMatch);

public abstract string[] FindUsersInRole (string roleName, string usernameToMatch);

abstract member FindUsersInRole : string * string -> string[]

Public MustOverride Function FindUsersInRole (roleName As String, usernameToMatch As String) As String()

参数

roleName

String

作为搜索范围的角色。

usernameToMatch

String

要搜索的用户名。

返回

String[]

一个字符串数组，包含用户名与 usernameToMatch 匹配且用户是指定角色的成员的所有用户的名称。

示例

下面的代码示例演示了一个示例 FindUsersInRole 实现。

public override string[] FindUsersInRole(string rolename, string usernameToMatch)
{
  OdbcConnection conn = new OdbcConnection(connectionString);
  OdbcCommand cmd = new OdbcCommand("SELECT Username FROM UsersInRoles  " +
                                    " WHERE Username LIKE ? AND RoleName = ? AND ApplicationName = ?", conn);
  cmd.Parameters.Add("@UsernameSearch", OdbcType.VarChar, 255).Value = usernameToMatch;
  cmd.Parameters.Add("@RoleName", OdbcType.VarChar, 255).Value = rolename;
  cmd.Parameters.Add("@ApplicationName", OdbcType.VarChar, 255).Value = pApplicationName;

  string tmpUserNames = "";
  OdbcDataReader reader = null;

  try
  { 
    conn.Open();

    reader = cmd.ExecuteReader();

    while (reader.Read())
    {
      tmpUserNames += reader.GetString(0) + ",";
    }
  }
  catch (OdbcException)
  {
    // Handle Exception.
  }
  finally
  {
    if (reader != null) { reader.Close(); }

    conn.Close();
  }

  if (tmpUserNames.Length > 0)
  {
    // Remove trailing comma.
    tmpUserNames = tmpUserNames.Substring(0, tmpUserNames.Length - 1);
    return tmpUserNames.Split(',');
  }

  return null;
}

Public Overrides Function FindUsersInRole(ByVal rolename As String, ByVal userNameToMatch As String) As String()
    Dim conn As OdbcConnection = New OdbcConnection(connectionString)
    Dim cmd As OdbcCommand = New OdbcCommand("SELECT Username FROM UsersInRoles  " & _
                                             " WHERE Username LIKE ? AND RoleName = ? AND ApplicationName = ?", conn)
    cmd.Parameters.Add("@UsernameSearch", OdbcType.VarChar, 255).Value = usernameToMatch
    cmd.Parameters.Add("@RoleName", OdbcType.VarChar, 255).Value = rolename
    cmd.Parameters.Add("@ApplicationName", OdbcType.VarChar, 255).Value = pApplicationName

    Dim tmpUserNames As String = ""
    Dim reader As OdbcDataReader = Nothing

    Try
        conn.Open()

        reader = cmd.ExecuteReader()

        Do While reader.Read()
            tmpUserNames &= reader.GetString(0) & ","
        Loop
    Catch e As OdbcException
        ' Handle exception.
    Finally
        If Not reader Is Nothing Then reader.Close()
        conn.Close()
    End Try

    If tmpUserNames.Length > 0 Then
        ' Remove trailing comma.
        tmpUserNames = tmpUserNames.Substring(0, tmpUserNames.Length - 1)
        Return tmpUserNames.Split(CChar(","))
    End If

    Return Nothing
End Function

注解

FindUsersInRole方法由 Roles 类调用，并返回角色中的用户列表，其中用户名包含为配置的 applicationName提供的 usernameToMatch 匹配项。 包括基于数据源的通配符支持。 用户按用户名的字母顺序返回。

如果roleName数据源中不存在，建议引发 ProviderException 。

另请参阅

• 实现角色提供程序