Drag and drop issues

Question

I used to be able to drag and drop rows within the same treegrid but now it doesn't work anymore. What am I doing wrong?I've tried recreating the issue on this page:@page "/counter"

Counter

Current count: @currentCount

@**@ @code { private int currentCount = 0; private void IncrementCount() { currentCount++; } public class BusinessObject { public int TaskId { get; set; } public string TaskName { get; set; } public int Duration { get; set; } public int Progress { get; set; } public string Priority { get; set; } public int? ParentId { get; set; } } public List TreeData = new List(); protected override void OnInitialized() { TreeData.Add(new BusinessObject() { TaskId = 1, TaskName = "Parent Task 1", Duration = 10, Progress = 70, ParentId = null, Priority = "High" }); TreeData.Add(new BusinessObject() { TaskId = 2, TaskName = "Child task 1", Duration = 4, Progress = 80, ParentId = 1, Priority = "Normal" }); TreeData.Add(new BusinessObject() { TaskId = 3, TaskName = "Child Task 2", Duration = 5, Progress = 65, ParentId = 1, Priority = "Critical" }); TreeData.Add(new BusinessObject() { TaskId = 4, TaskName = "Parent Task 2", Duration = 6, Progress = 77, ParentId = null, Priority = "Low" }); TreeData.Add(new BusinessObject() { TaskId = 5, TaskName = "Child Task 5", Duration = 9, Progress = 25, ParentId = 4, Priority = "Normal" }); TreeData.Add(new BusinessObject() { TaskId = 6, TaskName = "Child Task 6", Duration = 9, Progress = 7, ParentId = 5, Priority = "Normal" }); TreeData.Add(new BusinessObject() { TaskId = 7, TaskName = "Parent Task 3", Duration = 4, Progress = 45, ParentId = null, Priority = "High" }); TreeData.Add(new BusinessObject() { TaskId = 8, TaskName = "Child Task 7", Duration = 3, Progress = 38, ParentId = 7, Priority = "Critical" }); TreeData.Add(new BusinessObject() { TaskId = 9, TaskName = "Child Task 8", Duration = 7, Progress = 70, ParentId = 7, Priority = "Low" }); }}

Pon Selva Jeganathan · Accepted Answer

Hi Andy, Thanks for contacting syncfusion forum. Query: Drag and drop issues We have checked your problem by preparing sample with your code snippet, we are able to reproduce the issues at our end. On further validation, in your sample you are using selection type as single and have not set the primary key column. So, while using drag and drop, we recommend that you set the selection type to "Multiple" and any one of the columns to set isPrimaryKey property to true. Please refer to the below code snippet Your code: Modified code: …. @code { Please refer to the below sample link: https://www.syncfusion.com/downloads/support/directtrac/general/ze/BlazorServerApp-998817751 Please refer to the below documentation and demo link, https://blazor.syncfusion.com/demos/tree-grid/draganddrop-within-grid?theme=bootstrap4 https://blazor.syncfusion.com/documentation/treegrid/rows/#drag-and-drop Please refer to the below API link: https://help.syncfusion.com/cr/blazor/Syncfusion.Blazor.TreeGrid.TreeGridColumn.html#Syncfusion_Blazor_TreeGrid_TreeGridColumn_IsPrimaryKey https://help.syncfusion.com/cr/blazor/Syncfusion.Blazor.TreeGrid.TreeGridSelectionSettings.html#Syncfusion_Blazor_TreeGrid_TreeGridSelectionSettings_Type Kindly get back to us for further assistance. Regards, Pon selva

Andy Richard · Answer

That worked. Thank you so much.

Pon Selva Jeganathan · Answer

Hi Andy,   
 
Thanks for the update. 
 
We are glad to hear that query has been resolved by our solution.   
   
Kindly get back to us for further assistance. We are happy to assist you. 

Regards,  
Pon selva