我正在研究 SQLCLR 与 Visual C# 2010 的集成,我想做的是,我有一个文件夹,其中包含一些图像,我的函数,遍历文件夹中的文件,并获取基本文件信息,如它的高度宽度等..
我从 Visual C# 2010 创建了一个 dll 并作为程序集添加到 Sql Server 2008 中,并且还创建了函数,但是当我尝试选择函数时出现以下错误。
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];
}
};
这是我在 sql server 中创建程序集的方式。
CREATE assembly GetFileList from 'E:\NBM Sites\DontDelete\SampleCLRIntegration.dll' with permission_set = safe
并创建了一个如下所示的 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;
并调用如下函数。
select * from dbo.fn_GetFiles('E:\NBM Sites\DontDelete')
我该如何解决这个错误?