Is there a way to get a dynamic object from query parameters in an ASP.NET Core WebAPI controller action?
When I try the following I get queries as an empty object
public object Action([FromQuery] dynamic queries)
{
...
}
-
How are you calling the endpoint? A similar question was asked here: stackoverflow.com/q/33018893/5803406devNull– devNull2020-02-09 22:26:21 +00:00Commented Feb 9, 2020 at 22:26
-
Looks like a lord of the rings method (one method to rule them all). FWIW, Even if you could do this, you probably shouldn't.TheGeneral– TheGeneral2020-02-09 22:27:27 +00:00Commented Feb 9, 2020 at 22:27
Add a comment
|
1 Answer
Here is a workaround of customizing a model binder to bind the query string to Dictionary type:
DynamicModelBinder
public class DynamicModelBinder:IModelBinder
{
public Task BindModelAsync(ModelBindingContext bindingContext)
{
if (bindingContext == null)
throw new ArgumentNullException(nameof(bindingContext));
var result = new Dictionary<string, dynamic> { };
var query = bindingContext.HttpContext.Request.Query;
if (query == null)
{
bindingContext.ModelState.AddModelError("QueryString", "The data is null");
return Task.CompletedTask;
}
foreach (var k in query.Keys)
{
StringValues v = string.Empty;
var flag = query.TryGetValue(k, out v);
if (flag)
{
if (v.Count > 1)
{
result.Add(k, v);
}
else {
result.Add(k, v[0]);
}
}
}
bindingContext.Result = ModelBindingResult.Success(result);
return Task.CompletedTask;
}
}
Controller
public object Action([ModelBinder(BinderType = typeof(DynamicModelBinder))]dynamic queries)
{
return queries;
}
Result
