我正在使用SQLCLR与Visual C#2010集成,我想要做的是,我有一个文件夹,其中包含一些图像,我的功能,通过文件夹中的文件进行迭代,并获得基本文件信息,如高度宽度等。
我从Visual C#2010创建了一个dll,并在Sql Server 2008中添加了一个程序集,并且还创建了函数,但是当我尝试选择函数时,我得到了以下错误..
A .NET Framework error occurred during execution of user-defined routine or aggregate "fn_GetFiles":
System.Security.SecurityException: Request failed.
System.Security.SecurityException:
at UserDefinedFunctions.GetFileList(String FolderPath)
at UserDefinedFunctions.GetFileInfo(String folderPath)
下面是我的.net功能..
[System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name = "FullTrust")]
public partial class UserDefinedFunctions
{
[SqlFunction(FillRowMethodName = "FillRow")]
public static IEnumerable GetFileInfo(string folderPath)
{
// Put your code here
return GetFileList(folderPath);
}
public static ArrayList GetFileList(string FolderPath)
{
ArrayList li = new ArrayList();
foreach (String s in Directory.GetFiles(FolderPath, "*.jpg"))
{
FileInfo info = new FileInfo(s);
object[] column = new object[3];
column[0] = Path.GetFileName(s);
column[1] = info.Length;
column[2] = s;
li.Add(column);
}
return li;
}
private static void FillRow(Object obj, out string filename, out string fileSize, out string filePath)
{
object[] row = (object[])obj;
filename = (string)row[0];
fileSize = (string)row[1];
filePath = (string)row[2];
}
};
这是我如何在sql server中创建程序集..
CREATE assembly GetFileList from 'E:\NBM Sites\DontDelete\SampleCLRIntegration.dll' with permission_set = safe
并创建了一个像下面这样的sql函数。
ALTER FUNCTION fn_GetFiles
(
@folderPath nvarchar(max)
)
RETURNS TABLE
(
[filename] nvarchar(max),
fileSize nvarchar(max),
filePath nvarchar(max)
)
AS EXTERNAL NAME GetFileList.UserDefinedFunctions.GetFileInfo;
并调用函数如下。
select * from dbo.fn_GetFiles('E:\NBM Sites\DontDelete')
如何解决此错误?
答案 0 :(得分:0)
您需要“外部访问”而非“安全”权限集。参见:
http://msdn.microsoft.com/en-us/library/ms345106.aspx
尝试:
with permission_set = EXTERNAL_ACCESS