注意:此方法在 .NET Framework 2.0 版中是新增的。
移除已配置的
applicationName 的指定角色中的指定用户名。
命名空间:System.Web.Security
程序集:System.Web(在 system.web.dll 中)
Public MustOverride Sub RemoveUsersFromRoles ( _
usernames As String(), _
roleNames As String() _
)
Dim instance As RoleProvider
Dim usernames As String()
Dim roleNames As String()
instance.RemoveUsersFromRoles(usernames, roleNames)
public abstract void RemoveUsersFromRoles (
string[] usernames,
string[] roleNames
)
public:
virtual void RemoveUsersFromRoles (
array<String^>^ usernames,
array<String^>^ roleNames
) abstract
public abstract void RemoveUsersFromRoles (
String[] usernames,
String[] roleNames
)
public abstract function RemoveUsersFromRoles (
usernames : String[],
roleNames : String[]
)
参数
- usernames
一个字符串数组,其中包含要从指定角色中移除的用户名。
- roleNames
一个字符串数组,其中包含要将指定用户名从中移除的角色的名称。
RemoveUsersFromRoles 由 Roles 类的 RemoveUserFromRole、RemoveUsersFromRole、RemoveUserFromRoles 和 RemoveUsersFromRoles 方法调用,以从数据源中的指定角色中移除指定用户。仅修改已配置的 ApplicationName 的角色。
如果没有为已配置的 applicationName 找到任何指定的 roleNames,则建议提供程序引发 ProviderException。
如果任何指定的 usernames 都不与已配置的 applicationName 的任何指定 roleNames 相关联,则建议提供程序引发 ProviderException。
如果任何指定的 usernames 为 空引用(在 Visual Basic 中为 Nothing) 或是空字符串,建议提供程序引发异常。
如果任何指定的 roleNames 为 空引用(在 Visual Basic 中为 Nothing) 或是空字符串,建议提供程序引发异常。
如果数据源支持事务,则建议将每个移除操作包含在一个事务中,如果有任何移除操作出现失败,则回滚事务并引发异常。
下面的代码示例演示 RemoveUsersFromRoles 方法的示例实现。
Public Overrides Sub RemoveUsersFromRoles(usernames As String(), rolenames As String())
For Each rolename As String In rolenames
If rolename Is Nothing OrElse rolename = "" Then _
Throw New ProviderException("Role name cannot be empty or null.")
If Not RoleExists(rolename) Then _
Throw New ProviderException("Role name not found.")
Next
For Each username As String in usernames
If username Is Nothing OrElse username = "" Then _
Throw New ProviderException("User name cannot be empty or null.")
For Each rolename As String In rolenames
If Not IsUserInRole(username, rolename) Then
Throw New ProviderException("User is not in role.")
End If
Next
Next
Dim conn As OdbcConnection = New OdbcConnection(connectionString)
Dim cmd As OdbcCommand = New OdbcCommand("DELETE FROM [" & usersInRolesTable & "]" & _
" WHERE Username = ? AND Rolename = ? AND ApplicationName = ?", conn)
Dim userParm As OdbcParameter = cmd.Parameters.Add("@Username", OdbcType.VarChar, 255)
Dim roleParm As OdbcParameter = cmd.Parameters.Add("@Rolename", OdbcType.VarChar, 255)
cmd.Parameters.Add("@ApplicationName", OdbcType.VarChar, 255).Value = ApplicationName
Try
conn.Open()
For Each username As String In usernames
For Each rolename As String In rolenames
userParm.Value = username
roleParm.Value = rolename
cmd.ExecuteNonQuery()
Next
Next
Catch e As OdbcException
' Handle exception.
Finally
conn.Close()
End Try
End Sub
public override void RemoveUsersFromRoles(string[] usernames, string[] rolenames)
{
foreach (string rolename in rolenames)
{
if (rolename == null || rolename == "")
throw new ProviderException("Role name cannot be empty or null.");
if (!RoleExists(rolename))
throw new ProviderException("Role name not found.");
}
foreach (string username in usernames)
{
if (username == null || username == "")
throw new ProviderException("User name cannot be empty or null.");
foreach (string rolename in rolenames)
{
if (!IsUserInRole(username, rolename))
throw new ProviderException("User is not in role.");
}
}
OdbcConnection conn = new OdbcConnection(connectionString);
OdbcCommand cmd = new OdbcCommand("DELETE FROM [" + usersInRolesTable + "]" +
" WHERE Username = ? AND Rolename = ? AND ApplicationName = ?", conn);
OdbcParameter userParm = cmd.Parameters.Add("@Username", OdbcType.VarChar, 255);
OdbcParameter roleParm = cmd.Parameters.Add("@Rolename", OdbcType.VarChar, 255);
cmd.Parameters.Add("@ApplicationName", OdbcType.VarChar, 255).Value = ApplicationName;
try
{
conn.Open();
foreach (string username in usernames)
{
foreach (string rolename in rolenames)
{
userParm.Value = username;
roleParm.Value = rolename;
cmd.ExecuteNonQuery();
}
}
}
catch (OdbcException)
{
// Handle exception.
}
finally
{
conn.Close();
}
}
Windows 98、Windows 2000 SP4、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition
.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表,请参见系统要求。
.NET Framework
受以下版本支持:2.0