我遇到了几种将数据插入 SQL Server（对于 FileStream）的不同方法。插入 FileStream 对象的最佳方法是什么？以下方法之间的主要区别是，一种方法直接进行插入，另一种方法放置 FileStream 对象的占位符。
一种方法是他们通过 C# 通过插入直接插入文档：
Link: 文件流 http://blogs.msdn.com/b/spike/archive/2011/02/28/inserting-a-file-into-a-filestream-table-from-c-and-how-to-get-it-back-as-well.aspx
con.Open();
string sql = "INSERT INTO MyFsTable VALUES (@fData, @fName, default)";
SqlCommand cmd = new SqlCommand(sql, con);
cmd.Parameters.Add("@fData", SqlDbType.Image, fileData.Length).Value = fileData;
cmd.Parameters.Add("@fName", SqlDbType.NVarChar).Value = fi.Name;
cmd.ExecuteNonQuery();
con.Close();
另一种方法是插入一行，但将文档（FileStream 列）保留为空。我必须输入一个虚拟值，因为当 FileStream 列为空时，我的“获取文件路径”调用返回 Null：
Link: 文件流 http://www.aghausman.net/dotnet/saving-and-retrieving-file-using-filestream-sql-server-2008.html
5: if (FileUpload1.FileContent.Length > 0)
6: {
7: SqlConnection objSqlCon = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString);
8: objSqlCon.Open();
9: SqlTransaction objSqlTran = objSqlCon.BeginTransaction();
10:
11: SqlCommand objSqlCmd = new SqlCommand("FileAdd",objSqlCon,objSqlTran);
12: objSqlCmd.CommandType = CommandType.StoredProcedure;
13:
14: SqlParameter objSqlParam1 = new SqlParameter("@SystemNumber", SqlDbType.Int);
15: objSqlParam1.Value = "1";
16:
17: SqlParameter objSqlParam2 = new SqlParameter("@FileType", SqlDbType.VarChar,4);
18: objSqlParam2.Value = System.IO.Path.GetExtension(FileUpload1.FileName);
19:
20: SqlParameter objSqlParamOutput = new SqlParameter("@filepath", SqlDbType.VarChar, -1);
21: objSqlParamOutput.Direction = ParameterDirection.Output;
22:
23: objSqlCmd.Parameters.Add(objSqlParam2);
24: objSqlCmd.Parameters.Add(objSqlParam1);
25: objSqlCmd.Parameters.Add(objSqlParamOutput);
26:
27:
28: objSqlCmd.ExecuteNonQuery();
29:
30: string Path = objSqlCmd.Parameters["@filepath"].Value.ToString();
31:
32: objSqlCmd = new SqlCommand("SELECT GET_FILESTREAM_TRANSACTION_CONTEXT()", objSqlCon, objSqlTran);
33:
34: byte[] objContext = (byte[])objSqlCmd.ExecuteScalar();
35:
36:
37: SqlFileStream objSqlFileStream = new SqlFileStream(Path, objContext, FileAccess.Write);
38:
39: objSqlFileStream.Write(buffer, 0, buffer.Length);
40: objSqlFileStream.Close();
41:
42: objSqlTran.Commit();
