ADO Database ASP.Net

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<%@ Page Language="C#" %>
   "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">


    
            id="grdEmployees"
        DataSourceID="srcEmployees"
        DataKeyNames="LastName,FirstName"
        AutoGenerateSelectButton="true"
        SelectedRowStyle-CssClass="selectedRow"
        Runat="server" />
            id="dtlEmployees"
        DataSourceID="srcEmployeeDetails"
        Runat="server" />
            id="srcEmployees"
        ConnectionString="<%$ ConnectionStrings:Employees %>"
        SelectCommand="SELECT LastName,FirstName
            FROM Employees"
        Runat="server" />
            id="srcEmployeeDetails"
        ConnectionString="<%$ ConnectionStrings:Employees %>"
        SelectCommand="SELECT * FROM Employees
            WHERE FirstName=@FirstName AND LastName=@LastName"
        Runat="server">
        
                    Name="FirstName"
            ControlID="grdEmployees"
            PropertyName='SelectedDataKey("FirstName")' />
                    Name="LastName"
            ControlID="grdEmployees"
            PropertyName='SelectedDataKey("LastName")' />
        
     
    


File: Web.config

  
             connectionString="Data Source=.\SQLEXPRESS;
         AttachDbFilename=|DataDirectory|MyDatabase.mdf;Integrated Security=True;User Instance=True" />