FormView datasource lost on button click in another formview

It seems like you are using FormView in ASP.NET Web Forms to display data in multiple views, and you are experiencing an issue where the datasource is lost on button click in another FormView.

This behavior might be caused by the ASP.NET Web Forms page lifecycle, which affects how data is managed between postbacks. When you click a button in one FormView, the page is likely posting back, causing the other FormView to lose its datasource.

To preserve the datasource between postbacks, you can use one of the following approaches:

1. Store the Datasource in ViewState: You can store the FormView datasource in the ViewState to ensure it's available across postbacks. This way, when the page posts back, you can retrieve the datasource from ViewState and re-bind it to the FormView.

   csharpCopy code
   protected void Page_Load(object sender, EventArgs e)
   {
       if (!IsPostBack)
       {
           // Bind the initial datasource to the first FormView
           FormView1.DataSource = GetDataSource();
           FormView1.DataBind();
       }
   }
   
   protected void Button_Click(object sender, EventArgs e)
   {
       // Process the button click
   
       // Rebind the datasource to the first FormView
       FormView1.DataSource = GetDataSource();
       FormView1.DataBind();
   }
   

2. Use Ajax or UpdatePanel: If you want to avoid full page postbacks, you can use Ajax or an UpdatePanel to perform the button click action without causing the other FormView to lose its datasource. This way, only the relevant part of the page will be updated.

   To use an UpdatePanel, wrap the section of the page that contains the FormView and the button inside the UpdatePanel control.

   aspxCopy code
   <asp:UpdatePanel runat="server" ID="UpdatePanel1">
       <ContentTemplate>
           <asp:FormView runat="server" ID="FormView1">
               <!-- FormView content -->
           </asp:FormView>
   
           <asp:Button runat="server" ID="Button1" Text="Button" OnClick="Button_Click" />
       </ContentTemplate>
   </asp:UpdatePanel>
   

By using one of these approaches, you can ensure that the datasource for the other FormView is not lost when clicking a button in a different FormView. Choose the approach that best fits your specific scenario and requirements.