使用Request.QueryString数组更新ASP.NET中的排序列

Question

I'm passing a list of guids in a GET request from a JQuery Ajax call.

on my ASP.NET controller side I want to iterate through the list and update the Display_Sort column to match my newly sorted list.

My ID is a Guid and I'm getting a type error in the following code, because it's a string that I'm passing to the Db. However, I can't seem to convert the item(string) into a Guid.

I've tried Guid(item) and it would allow the constructor. Not sure what I'm missing.

Here is the code:

        //REORDER HOME ASSETS
    public ActionResult ReOrderHome()
    {
        using (var db = new IFEntities())
        {
            var myString = Request.QueryString;
            var i = 1;

            foreach (var item in myString)
            {
               var myObj = db.HomeContents.Find(item);
                myObj.display_order = i;
                db.SaveChanges();
                i++;
            }
        } 

Answer 1

You can convert item to GUID and then compare like this.

var myObj = db.HomeContents.Find(new Guid(item));

Or, you can use select instead of find . Syntax for select --

foreach (var item in myString)
{
    var myObj = db.HomeContents.Select(p => p.<GUID_COLUMN_NAME> == item);
    myObj.display_order = i;
    db.SaveChanges();
    i++;
}

Replace GUID_COLUMN_NAME with actual column name.