GridView 剔除

<asp:TemplateField ShowHeader="False" HeaderText="删除">                            <ItemTemplate>                                <asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="False"                                     CommandName="del" OnClientClick="javascript:return confirm('确定删除吗？')"                                    Text="删除"></asp:LinkButton>                            </ItemTemplate>                        </asp:TemplateField> 

protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)    {        int index = int.Parse(e.CommandArgument.ToString());//调试，到这里出错，输入字符串的格式不正确        int id = int.Parse(this.GridView1.DataKeys[index].Value.ToString());        try        {            if (e.CommandName == "del")            {                OracleConnection conn = new OracleConnection(ConnectionString);                string str = "delete from message where id = " + id + "";                OracleCommand com = new OracleCommand(str, conn);                conn.Open();                com.ExecuteNonQuery();                conn.Close();            }        }        catch         {                    }    }

<asp:TemplateField ShowHeader="False" HeaderText="删除">                            <ItemTemplate>                                <asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="False"                                     CommandName="del" CommandArgument='"<%Eval("ID")%>"' OnClientClick="javascript:return confirm('确定删除吗？')"                                    Text="删除"></asp:LinkButton>                            </ItemTemplate>                        </asp:TemplateField>