1
我遇到过一个场景，我想将大量数据传递给存储过程以生成一些动态SQL。SQL Server CLR存储过程JSON参数
我想传递的数据存储在我在ASP.NET MVC Web项目中使用的Json/C＃类对象中。
[
{
"code":"ABC123",
"Count": "12998",
"Params":
[
{"name": "Recent", "value": "0-12m"},
{"name": "Orders", "value": "1"}
]
},
{
"code":"ABC124",
"Count": "13998",
"Params":
[
{"name": "Recent", "value": "0-12m"},
{"name": "Orders", "value": "2"}
]
},
{
"code":"ABC125",
"Count": "7998",
"Params":
[
{"name": "Recent", "value": "0-12m"},
{"name": "Orders", "value": "3"}
]
}
]
.....
然后使用该文本参数转换回JSON对象，我用这一个动作过滤器将其转换为一个对象。
public class ObjectFilter : ActionFilterAttribute
{
public string Param { get; set; }
public Type RootType { get; set; }
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
if ((filterContext.HttpContext.Request.ContentType ?? string.Empty).Contains("application/json"))
{
object o =
new DataContractJsonSerializer(RootType).ReadObject(filterContext.HttpContext.Request.InputStream);
filterContext.HttpContext.Request.InputStream.Seek(0, SeekOrigin.Begin); // Rewind InputStream for other filters
filterContext.ActionParameters[Param] = o;
}
else
{
var xmlRoot = XElement.Load(new StreamReader(filterContext.HttpContext.Request.InputStream,
filterContext.HttpContext.Request.ContentEncoding));
object o = new XmlSerializer(RootType).Deserialize(xmlRoot.CreateReader());
filterContext.ActionParameters[Param] = o;
}
}
}
然后用C＃等在我的CLR存储过程创建一个SQL语句，如：
UPDATE [Sample]
SET [Field] =
CASE
WHEN [Recent] = "0-12m" AND [Orders] = "1" THEN "ABC123"
WHEN [Recent] = "0-12m" AND [Orders] = "2" THEN "ABC124"
WHEN [Recent] = "0-12m" AND [Orders] = "3" THEN "ABC125"
...
这是可能的，有没有人做过这样的事。我看过几篇关于使用XML参数的文章，但没有使用使用反序列化（？）json的varchar参数的文章。
这可能有助于[在SQL Server中使用JSON字符串]（http：// www.simple-talk.com/sql/t-sql-programming/consuming-json-strings-in-sql-server/?utm_source=simpletalk&utm_medium=email-main&utm_content=JSON-20101116&utm_campaign=SQL） – aaroned 2010-11-19 07:19:50