I've come across a scenario where I want to pass a large amount of data to a Stored Procedure for generating some dynamic SQL.
The data I want to pass is stored in this Json/C# class object that I use in my ASP.NET MVC web project.
[
{
"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"}
]
}
]
.....
Then use this text parameter to convert back to a JSON object, I use this in an action filter to convert it to an object.
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;
}
}
}
and then use C# etc in my CLR Stored Procedure to create a SQL statement such as:
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"
...
Is this possible and has anyone ever done anything like this. I've seen a few posts on using a XML parameter but none using a varchar parameter using de-serialized (?) json.
