After return from GetAsync method in custom adaptor the program freeze

[Ted]

While I use custom adaptor in <SfDataManager> for a <SfGrid>

after return from GetAsync

the screen appear a circle go round and round and cannot click any place

what happened ?

and after return from GetAsync method, what is the next step to run ?

[Ted]

sorry, after i upgrade from v.18.xx to v.19.2.0.56 , the problem seems do disappear

but the AllowSorting for <SfGrid>doesn't work

  

[Rahul Narayanasamy]

HI Ted, 

Greetings from Syncfusion. 

Query: after i upgrade from v.18.xx to v.19.2.0.56 , the problem seems do disappear but the AllowSorting for <SfGrid>doesn't work 

We have validated your query and we suspect that you are facing difficulties in performing sorting operation while using CustomAdaptor. While using CustomAdaptor, you need to handle the dataoperations(sorting, filtering,etc) in CustomAdaptor Read/ReadAsync method. Find the below code snippets, sample and documentation for your reference. 

Reference: 

https://blazor.syncfusion.com/documentation/datagrid/custom-binding  

https://blazor.syncfusion.com/documentation/datagrid/custom-binding#data-binding 

// Implementing custom adaptor by extending the DataAdaptor class 

   public class CustomAdaptor : DataAdaptor 

    { 

        // Performs data Read operation 

        public override object Read(DataManagerRequest dm, string key = null) 

        { 

            IEnumerable<Order> DataSource = Orders; 

            DataResult DataObject = new DataResult(); 

            if (dm.Search != null && dm.Search.Count > 0) 

            { 

                // Searching 

                DataSource = DataOperations.PerformSearching(DataSource, dm.Search); 

            } 

            if (dm.Sorted != null && dm.Sorted.Count > 0) 

            { 

                // Sorting 

                DataSource = DataOperations.PerformSorting(DataSource, dm.Sorted); 

            } 

            if (dm.Where != null && dm.Where.Count > 0) 

            { 

                // Filtering 

                DataSource = DataOperations.PerformFiltering(DataSource, dm.Where, dm.Where[0].Operator); 

            } 

            int count = DataSource.Cast<Order>().Count(); 

            if (dm.Skip != 0) 

            { 

                //Paging 

                DataSource = DataOperations.PerformSkip(DataSource, dm.Skip); 

            } 

            if (dm.Take != 0) 

            { 

                DataSource = DataOperations.PerformTake(DataSource, dm.Take); 

            } 

            . . . 

            return dm.RequiresCounts ? new DataResult() { Result = DataSource, Count = count } : (object)DataSource; 

        } 

    } 

Sample: https://www.syncfusion.com/downloads/support/forum/168172/ze/SfGridSample-1677345124  

If you are still facing the problem, then could you please share the below details. It will be helpful to validate and provide a better solution. 

• Full Grid and CustomAdaptor code snippets.
• Reproduce the problem in the provided sample and revert back to us.
• Share a simple reproduceable sample if possible.

Regards, 

Rahul