好吧,让我们打破这:
验证用户可以写入表(这如果是真的,如果不返回1,0):
SELECT isnull(has_perms_by_name('MyDb.dbo.MyTable', 'OBJECT', 'INSERT'), 0)
验证用户可以编写该发布商:
SELECT count(*) FROM UserPermissions WHERE
UserName = 'username' AND Publisher = 'publisher'
现在,这是SQL的那些,而不是实际的C#。为了获取值在C#:
SqlConnection SqlConn = new SqlConnection("connection_string_goes_here");
SqlCommand SqlCmd = new SqlCommand();
SqlConn.Open();
SqlCmd.Connection = SqlConn;
SqlCmd.CommandText = "SELECT isnull(has_perms_by_name('MyDb.dbo.MyTable', " +
"'OBJECT', 'INSERT'), 0)"
if (SqlCmd.ExecuteScalar())
{
SqlCmd.CommandText =
"SELECT count(*) FROM UserPermissions WHERE " +
"Username = " + System.Environment.UserDomainName + "\" +
System.Environment.UserName + " " +
AND Publisher = @Publisher";
SqlCmd.Parameters.Add("@Publisher", SqlDbType.NVarChar);
SqlCmd.Parameters("@Publisher").Value = PublisherInput;
if(SqlCmd.ExecuteScalar())
{
SqlCmd.Parameters.Clear();
SqlCmd.CommandText = "INSERT INTO Books (Title, Publisher) VALUES " +
"(@Title, @Publisher)";
SqlCmd.Parameters.Add("@Title", SqlDbType.NVarChar);
SqlCmd.Parameters.Add("@Publisher", SqlDbType.NVarChar);
SqlCmd.Parameters("@Title").Value = TitleInput;
SqlCmd.Parameters("@Publisher").Value = PublisherInput;
SqlCmd.ExecuteNonQuery();
}
}
SqlCmd.Dispose();
SqlConn.Close();
SqlConn.Dispose();
最后一点,清洗你输入。在您的应用程序中使用参数,并且不相信任何用户,即使是内部用户。我无法强调这一点。
编辑:因为有不止一种方法更对皮肤一只猫,我觉得我的愚蠢到不包括LINQ to SQL解决方案(至少计数问题):
int PermsAvailable = (from up in db.UserPermissions
where up.Username ==
System.Environment.UserDomainName + "\" +
System.Environment.UserName
&& up.Publisher == PublisherInput
select up).Count();
if(PermsAvailable)
{
var NewBook = New Book with {.Title = TitleInput, .Publisher = PublisherInput};
db.Books.Add(NewBook);
}
您需要直接查询SQL Server权限元数据。有一些可以调用的存储过程会执行此操作,但我似乎记得这不是一项简单的任务。 – 2009-06-07 18:34:52