如何将指定JSON数据绑定到DevExpress WinForms LookUpEdit控件？

Got it, let's get this JSON binding to your LookUpEdit working properly. Here's what you need to do:

First, Fix Your JSON File #

Your current JSON has unquoted keys (like 01 instead of "01"), which isn't valid JSON. Update your numbers.json to use quoted keys:

{
  "01": "One",
  "02": "Two",
  "03": "Three",
  "04": "Four",
  "05": "Five",
  "06": "Six",
  "07": "Seven",
  "08": "Eight",
  "09": "Nine",
  "10": "Ten"
}

Adjust Your Binding Code #

When you parse the JSON into a JObject, it's a collection of JProperty entries, but LookUpEdit needs a simple list of objects with clear Key and Value properties to bind to. Here's the corrected code:

using Newtonsoft.Json.Linq;
using System.Linq;

// Read and parse the valid JSON
var json = File.ReadAllText(@"numbers.json");
var jsonObject = JObject.Parse(json);

// Convert JObject properties into a bindable list
var numberItems = jsonObject.Properties()
    .Select(prop => new { 
        Key = prop.Name, 
        Value = prop.Value.ToString() 
    })
    .ToList();

// Configure the LookUpEdit control
lookUpEdit1.Properties.DropDownRows = numberItems.Count > 10 ? 10 : numberItems.Count;
lookUpEdit1.Properties.DisplayMember = "Key";
lookUpEdit1.Properties.ValueMember = "Value";
lookUpEdit1.Properties.DataSource = numberItems;

// Optional: Force the control to refresh and show the new data
lookUpEdit1.Refresh();

Why This Works #

• jsonObject.Properties() gives us each key-value pair from the JSON as a JProperty object.
• We use LINQ to project each JProperty into an anonymous type with explicit Key and Value properties—this is the structure LookUpEdit expects for binding.
• Setting this list as the DataSource lets the control map DisplayMember (what the user sees) and ValueMember (the underlying value) correctly.

Optional: Use a Strongly-Typed Class #

If you want to avoid anonymous types (good for reusability or type safety), create a simple class:

public class NumberEntry
{
    public string Key { get; set; }
    public string Value { get; set; }
}

Then adjust the LINQ query to use this class:

var numberItems = jsonObject.Properties()
    .Select(prop => new NumberEntry { 
        Key = prop.Name, 
        Value = prop.Value.ToString() 
    })
    .ToList();

That's it—your LookUpEdit should now populate correctly with the JSON data!

内容的提问来源于stack exchange，提问作者user1372430