There seems to be no proper GridView layout for __doPostBack

Question

I asked this question regarding the strange behavior of the GridView control in ASP.Net (I use C #).

For each row in my GridView there is a “Change” and “Delete” link. Editing, for example, has this javascript:__doPostBack('gvwServers','Edit$0'). Therefore, it is obvious that the server is about to find out if someone clicked to edit the line 0 gvwServers.

Fair enough. If I click the "Edit" link, I get a postback, and the GridView will be redrawn with the "Edit" button replaced with the "Update" and "Cancel" button. Standard behavior. NOW - The Cancel button has this link javascript:__doPostBack('gvwServers','Cancel$0')- exactly what I expect Cancel line 0from gvwServers. BUT the Refresh button has javascript:__doPostBack('gvwServers$ctl02$ctl00',''). That doesn't seem to make any sense. And this, apparently, is the reason that my program processes the update without being fired.

Why doesn't ASP output the correct feedback arguments?

My code is available at the link above.

<asp:GridView ID="gvwServers" runat="server" class="gvwServers"  
AutoGenerateColumns="false"  OnRowEditing="gvwServers_Edit" 
onrowcancelingedit="gvwServers_Cancelling" onrowdeleting="gvwServers_Deleting" 
onrowupdated="gvwServers_Updated" onrowupdating="gvwServers_Updating"
AutoGenerateEditButton=true AutoGenerateDeleteButton=true>

<columns>
    <asp:CommandField  ShowEditButton="true" />
    <asp:CommandField  ShowDeleteButton="true" /> 
    <asp:BoundField DataField="intServerID" visible="false" />

    <asp:TemplateField HeaderText = "Server Name">
        <ItemTemplate>
            <asp:Label ID="lblServerName" runat="server" Text='<%# Bind("txtName") %>'></asp:Label>
        </ItemTemplate>
        <EditItemTemplate>
            <asp:TextBox ID="txtServerName_Edit" runat="server" Text='<%# Bind("txtName") %>'></asp:TextBox>
        </EditItemTemplate>
    </asp:TemplateField>

    <asp:TemplateField  HeaderText = "Key">
        <ItemTemplate>
            <asp:Label ID="lblAppKey" runat="server" Text='<%# Bind("txtApplicationKey") %>'></asp:Label>
        </ItemTemplate>
        <EditItemTemplate>
            <asp:TextBox ID="txtAppKey_Edit" runat="server" Text='<%# Bind("txtApplicationKey") %>'></asp:TextBox>
        </EditItemTemplate>
    </asp:TemplateField>

    <asp:TemplateField  HeaderText = "Connection String">
        <ItemTemplate>
            <asp:Label ID="lblConnString" runat="server" Text='************'></asp:Label>
        </ItemTemplate>
        <EditItemTemplate>
            <asp:TextBox runat="server" ID="txtConnString_Edit" Width="300px" Height="100px" Text='<%# Bind("txtConnectionString")%>' TextMode="MultiLine" ></asp:TextBox>
        </EditItemTemplate>
    </asp:TemplateField>

</columns>
</asp:GridView> 

Answer 1

, / . . Response.Write , , .

public class Item
{
    public int intServerID { get; set; }
    public string txtName { get; set; }
    public string txtApplicationKey { get; set; }
    public string txtConnectionString { get; set; }
}

protected void Page_Load(object sender, EventArgs e)
{
    Item item = new Item();
    item.intServerID = 1;
    item.txtName = "Apple";
    item.txtApplicationKey = "Orange";
    item.txtConnectionString = "Test";

    List<Item> items = new List<Item>();
    items.Add(item);

    gvwServers.DataSource = items;
    gvwServers.DataBind();
}

protected void gvwServers_Edit(object sender, GridViewEditEventArgs e)
{
    Response.Write("Edit");
    gvwServers.EditIndex = e.NewEditIndex;
    gvwServers.DataBind();
}
protected void gvwServers_Updated(object sender, GridViewUpdatedEventArgs e)
{
    Response.Write("Updated");
    gvwServers.DataBind();
}

protected void gvwServers_Updating(object sender, GridViewUpdateEventArgs e)
{
    Response.Write("Updating");
    gvwServers.DataBind();
}
protected void gvwServers_Deleting(object sender, GridViewDeleteEventArgs e)
{
    Response.Write("Delete");
    gvwServers.DataBind();
}
protected void gvwServers_Cancelling(object sender, GridViewCancelEditEventArgs e)
{
    Response.Write("Cancel");

    e.Cancel = true;
    gvwServers.EditIndex = -1;
    gvwServers.DataBind();
}