FlexGrid ItemSource not updating after initial button click

FlexGrid ItemSource not updating after initial button click

Posted by: rick.benz on 18 October 2022, 3:38 am EST

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  rick.benz

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  Posted 18 October 2022, 3:38 am EST

  I’ve created a simple FlexGrid that has an ItemSource that starts out empty and once the user clicks a button the data is obtained but the FlexGrid does not update when the ItemSource is updated. If I click the button a second time, it will update the table. I have a method that will get the users project data and I do have StateHasChanged() in this method.

  I’m not seeing a setting that will update the table upon changes to the itemsource.

  [code]<button class=“btn btn-primary” @onclick=“GetFwUserProjects”>Click me

  <FlexGrid ItemsSource="FwUserProjects"        
            AutoGenerateColumns=false               
            VerticalScrollBarVisibility="ScrollBarVisibility.Visible"
            ColumnHeaderStyle="@("background-color:#1565C0;color:#FFF;font-size:16px;")"
            ColumnOptionsMenuVisibility="GridColumnOptionsMenuVisibility.Visible"
            MinColumnWidth="85" 
            Style="@("max-height:50vh")">
      <FlexGridColumns>
          <GridColumn Binding="name" MinWidth="110" Width="GridLength.Star"/>
          <GridDateTimeColumn Binding="created_at" Format="d" Mode="GridDateTimeColumnMode.Date" Header="Created Date"/>                
      </FlexGridColumns>
  </FlexGrid>  
  

  [/code]

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  manish.gupta

  

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  Posted 20 October 2022, 5:48 pm EST

  Hi Rick,

  We are sorry for the inconvenience, but we are unable to replicate the issue at our end. Please refer to the attached sample for reference.

  Regards,

  Manish Gupta

  FlexGrid__Button_DataLoad.zip

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  rick.benz

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  Posted 21 October 2022, 1:32 am EST

  Thanks for the example though as I stated the issue is when a user clicks a button it does not load, and in your example you are PRE-LOADING Customer data, which is by-passing the scenario I indicated. I do not want to pre-load data for a page unless it is being called.

  In your example you are pre-loading the customers data with OnInitializedAsync and when you click your example button it works, just like I indicated in my example when I click the button a second time.

  So is this the only way your flexgrid works?

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  manish.gupta

  

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  Posted 14 May 2023, 3:46 pm EST

  Hi Rick,
  
  you may also use the following code snippet:

  protected override async Task OnInitializedAsync()
      {
          customers = Customers.GetCustomers(0);
      }

  The following code can also be used:

   IEnumerable<Customers> customers;
      protected override async Task OnInitializedAsync()
      {
          //customers = Customers.GetCustomers(0);
      }
      public void loadData()
      {
          customers = Customers.GetCustomers(5);
      }

  Regards,
  
  Manish Gupta