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ASP.NET C# LinkButton onClick executes code on page_load


I have code that I would like to work the following way:

DataGrid has a linkbutton :  GetDetail
When clicked it should execute function GetLoanDetail("LOAN_NUMBER")

the function sets a session var and then rebinds a formview control

what happens is on page_load, asp.net when creating the linkbuttons in the datagrid executes the rebind code and the page is not right.  below is the code that does this:

Function: GetLoanDetail

public static string GetLoanDetail(String LoanID)
        string result = string.Empty;
        HttpContext.Current.Session["currentLoanNumber"] = LoanID.ToString();
        FormView formViewLoanDetail = new FormView();


        return result;


Link Button Line:

<asp:LinkButton ID="lnkButtonGetLoanDetail" runat="server" Text="Get Loan Detail" OnClick='<%# GetLoanDetail(Eval("LOAN_NUMBER").ToString()) %>'></asp:LinkButton>            

This is very important and i have assigned 500 points. Thanks in advance!!!
.NET ProgrammingC#

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8/22/2022 - Mon