asp.net : DetailsView update not working

Question

When I click on the auto-generated Update button, absolutely nothing happens. Can you see anything wrong with my code below?

Should there be more code somewhere else to make the update happen?

  <asp:DetailsView ID="DetailsView1"
  runat="server"
  AutoGenerateRows="False" 
  DataKeyNames="student_id" DataSourceID="SqlDataSource1" 
  ForeColor="Blue"
  BackColor="#FFF7E6"            
  AutoPostBack="True"                        
  AutoGenerateEditButton = True
  AutoGenerateInsertButton = True
    OnModeChanging="StudentDetailView_ModeChanging"                         
  Height=163px
  Width=327px              
  style="left: 400px; top: 1px; position: absolute;">  

    <Fields>                             

    <asp:TemplateField 
      HeaderText="Username">            
    <EditItemTemplate>
    <asp:TextBox 
      id="txtUserName"
      Text = '<%# Bind ("username") %>'
      runat = "server" />
    <asp:RequiredFieldValidator
      ID = "reqUserName"
      ControlToValidate = "txtUserName"
      Text = "(required)"
      Display = "Dynamic"
      runat = "server" />            
    </EditItemTemplate>
    <ItemTemplate>
      <asp:Label 
        id="UsernameLabel"
        runat="server"
        Text = '<%# Eval("username") %>' />
    </ItemTemplate>
    </asp:TemplateField>            

    <asp:TemplateField 
      HeaderText="Password">
    <EditItemTemplate>
    <asp:TextBox 
      id="txtPassword"
      Text = '<%# Bind ("password") %>'
      runat = "server" />
    <asp:RequiredFieldValidator
      ID = "reqPassword"
      ControlToValidate = "txtPassword"
      Text = "(required)"
      Display = "Dynamic"
      runat = "server" />            
    </EditItemTemplate>
    <ItemTemplate>
      <asp:Label 
        id="PasswordLabel"
        runat="server"
        Text = '<%# Eval("password") %>' />
    </ItemTemplate>
    </asp:TemplateField>                 

  <asp:TemplateField 
    HeaderText="Date of birth">           
    <EditItemTemplate>
      <asp:TextBox 
        id="txtDOB"
        Text = '<%# Bind("dateofbirth") %>'
        runat = "server" />
      <asp:RangeValidator 
        runat="server" id="rngDOB" 
        controltovalidate="txtDOB" 
        type="Date" 
        minimumvalue="01-01-1930" 
        maximumvalue="01-01-2007" 
        errormessage="Please enter a valid date."
        HtmlEncode="false" />                        
    </EditItemTemplate>            
    <ItemTemplate>
      <asp:Label 
        id="DOBLabel"
        runat="server"                
        DataFormatString="{0:dd/MM/yyyy}"
        HtmlEncode="false"
        />
    </ItemTemplate>              
  </asp:TemplateField>              

  <asp:TemplateField 
    HeaderText="Start date">           
    <EditItemTemplate>
      <asp:TextBox 
        id="txtStartDate"
        Text = '<%# Bind("startdate") %>'                               
        runat = "server" />
      <asp:RangeValidator 
        runat="server" id="rngStartDate" 
        controltovalidate="txtStartDate" 
        type="Date" 
        minimumvalue="01-01-1930" 
        maximumvalue="01-01-2050" 
        errormessage="Please enter a valid date."
        HtmlEncode="false" />                        
    </EditItemTemplate>            
    <ItemTemplate>
      <asp:Label 
        id="StartDateLabel"
        runat="server"                
        DataFormatString="{0:dd/MM/yyyy}"
        HtmlEncode="false"
        />
    </ItemTemplate>              
  </asp:TemplateField>

       <asp:BoundField
       datafield="maths"
       headertext="Maths"
       SortExpression="maths"
       />

       <asp:BoundField ApplyFormatInEditMode="True" DataFormatString="<%=date()%>" />

    </Fields>
</asp:DetailsView>       





<asp:SqlDataSource 
  ID="SqlDataSource1"
  runat="server" 
  ConnectionString="<%$ ConnectionStrings:FCLManager %>" ProviderName="MySql.Data.MySqlClient"
  SelectCommand="SELECT * from tblstudentinfo WHERE centre_id = @CentreID and fullname = @FullName"  
  UpdateCommand="UPDATE [tblstudentinfo] SET [username] = @username, [password] = @password    etc. etc.   WHERE [centre_id] = @CentreID and [fullname] = @FullName">

  <UpdateParameters>
    <asp:Parameter Name="student_id" Type="Int32" />
    <asp:Parameter Name="centre_id" Type="Int16" />
    <asp:Parameter Name="username" Type="String" />
    <asp:Parameter Name="password" Type="String" />
    <asp:Parameter Name="fullname" Type="String" />
    <asp:Parameter Name="firstname" Type="String" />
    <asp:Parameter Name="surname" Type="String" />
    <asp:Parameter Name="dateofbirth" Type="DateTime" />  
    <asp:Parameter Name="classday1" Type="String" />
    <asp:Parameter Name="classday2" Type="String" />
    <asp:Parameter Name="startdate" Type="DateTime" />
    <asp:Parameter Name="currentstudent" Type="String" />
    <asp:Parameter Name="maths" Type="String" />
    <asp:Parameter Name="english" Type="String" />
    <asp:Parameter Name="gender" Type="String" />
    <asp:Parameter Name="address1" Type="String" />
    <asp:Parameter Name="address2" Type="String" />
    <asp:Parameter Name="address3" Type="String" />
    <asp:Parameter Name="address4" Type="String" />
    <asp:Parameter Name="telephonenumber" Type="String" />
    <asp:Parameter Name="postcode" Type="String" />
    <asp:Parameter Name="emailaddress" Type="String" />
    <asp:Parameter Name="mathsnotes" Type="String" />
    <asp:Parameter Name="englishnotes" Type="String" /> 
  </UpdateParameters>

  <SelectParameters>         
    <asp:Parameter Name="CentreID" Type="Int16" DefaultValue="0" />
    <asp:Parameter Name="FullName" Type="String" DefaultValue="0" />
  </SelectParameters>          
</asp:SqlDataSource>

Please note that some of the fields have been omitted here in the interests of shortness!

Answer 1

1. AutoPostBack="True" should be set to false
2. Show your codebehind and also show code that is in modechanging

Edit: If your inserting event is not fire, you need to check if rowcommand event fire. if that event fire you can manually call the particular event

yourDetails.InsertItem(false);