asp.net新手请进 - .NET技术 / ASP.NET

C# code:

SqlConnection conn = CsDB.sqlcon();
SqlDataAdapter da = new SqlDataAdapter("select fwCoding from bjmuma_fwCoding where OrderNumber='" + Order + & ......

Microsoft JET Database Engine '80040e07' 
标准表达式中数据类型不匹配。 
\wwwroot\update.asp, line 20
--------------------------------------------------------------------------------
Ho ......

sqlserver的数据库，字段是image类型的。怎么写代码，在页面中点击“下载”就能打开那个下载对话框？
PS：OracleLob 在sqlserver里是什么？
Response.Redirect("test.jpg")

引用
Response.Redirect( ......

<table   border= "0 "   cellspacing= "0 "   cellpadding= "0 ">
<BH_CHANNELS   ID= "OWNER "   CHILDTYPE= "aaa " ......