动态创建LinkButton不会到命令的事件

Question

我们已经问过，但可悲的是我还是有问题的，该问题没有得到解决。基本上，我是动态创建一个LinkButton为每个行表我产生，和那个按钮有任务的删除该行与相应的标识数据库。要做到这一点，我似乎需要分配的LinkButton命令，所以它将进入的事件，当它被点击。问题是，当按钮的点击程序 从来没有 进入的命令-我已经把断点，在那里，它从未进入它们。这是我的代号：

protected void Page_Init(object sender, EventArgs e)
        {
            if (Request.QueryString["id"] != null)
            {

                ColorConverter conv = new ColorConverter();
                string connection = ConfigurationManager.ConnectionStrings["TPRTestConnectionString"].ConnectionString;
                TPRDBDataContext dc = new TPRDBDataContext();
                DataContext db = new DataContext(connection);
                Table<SageAccount> SageAccount = db.GetTable<SageAccount>();
                Table<InvoiceItem> InvoiceItem = db.GetTable<InvoiceItem>();
                Table<Invoice> Invoice = db.GetTable<Invoice>();
                Boolean alloweditting = (from s in dc.Invoices where s.id.ToString() == Request.QueryString["id"] select s.alloweditting).Single();
                if (alloweditting == false)
                {
                    dtlsInsert.Visible = false;
                    modalPanel.Visible = false;
                }
                int sagepk = (from s in dc.Invoices where s.id.ToString() == Request.QueryString["id"] select s.sageaccount).Single();
                lblSageID.Text = (from s in dc.SageAccounts where s.ID == sagepk select s.SageID).Single();
                lblDate.Text = DateTime.Now.ToShortDateString();


                Table table = new Table();
                table.Width = Unit.Percentage(100);
                table.GridLines = (GridLines)3;

                TableHeaderRow header = new TableHeaderRow();
                header.BackColor = (System.Drawing.Color)conv.ConvertFromString("#EDEDED");
                foreach (string header2 in new string[] { "", "Quantity", "Rate", "Description", "Nominal Code", "Subtotal" })
                {
                    TableCell cell = new TableCell();
                    cell.Text = header2;
                    header.Cells.Add(cell);
                }

                table.Rows.Add(header);

                var data = (from s in dc.InvoiceItems where s.invoiceid.ToString() == Request.QueryString["id"].ToString() select s);
                foreach (var x in data)
                {

                    TableRow row = new TableRow();
                    if (x.invoicetext == null)
                    {
                        decimal total;
                        try
                        {
                            total = (decimal)x.rate * (decimal)x.quantity;
                        }
                        catch
                        {
                            total = 0;
                        }
                        int i = 0;
                        foreach (string columnData in new string[] { x.id.ToString(), x.quantity.ToString(), x.rate.ToString(), x.description, x.nominalcode, total.ToString("N2") })
                        {
                            TableCell cell = new TableCell();
                            {
                                if (i == 0)
                                {
                                    LinkButton lnkdel = new LinkButton();
                                    lnkdel.Text = "Delete";
                                    lnkdel.ID = "lnkDel" + Guid.NewGuid();

                                    if (alloweditting == false)
                                    {
                                        lnkdel.Enabled = false;
                                    }
                                    lnkdel.Font.Bold = false;
                                    lnkdel.CommandArgument = x.id.ToString();
                                    //lnkdel.Command += lnkdel_Command;
                                    //lnkdel.Command += new CommandEventHandler(this.lnkdel);
                                    cell.Controls.Add(lnkdel);
                                    i++;
                                }
                                else
                                {
                                    cell.Text = columnData;
                                }


                            }

                            row.Cells.Add(cell);
                        }



                        runningtotal = runningtotal + total;

                    }
                    else
                    {
                        int i = 0;

                        foreach (string columnData in new string[] { x.id.ToString(), x.invoicetext })
                        {
                            TableCell cell = new TableCell();

                            if (i == 0)
                            {
                                LinkButton lnkdel = new LinkButton();
                                lnkdel.Text = "Delete";
                                lnkdel.ID = "lnkDel" + Guid.NewGuid();

                                if (alloweditting == false)
                                {
                                    lnkdel.Enabled = false;
                                }
                                lnkdel.Font.Bold = false;
                                          //lnkdel.Command += lnkdel_Command;
                                    //lnkdel.Command += new CommandEventHandler(this.lnkdel);
                                lnkdel.CommandArgument = x.id.ToString();



                                cell.Controls.Add(lnkdel);
                                i++;
                            }
                            else
                            {
                                cell.Text = columnData;
                                cell.ColumnSpan = 5;
                            }
                            row.Cells.Add(cell);

                        }

                    }

                    switch (x.formatoptions)
                    {
                        case 1:
                            row.ForeColor = (System.Drawing.Color)conv.ConvertFromString("black");
                            row.Font.Bold = false;
                            break;
                        case 2:
                            row.ForeColor = (System.Drawing.Color)conv.ConvertFromString("black");
                            row.Font.Bold = true;
                            break;
                        case 3:
                            row.ForeColor = (System.Drawing.Color)conv.ConvertFromString("red");
                            row.Font.Bold = false;
                            break;
                        case 4:
                            row.ForeColor = (System.Drawing.Color)conv.ConvertFromString("red");
                            row.Font.Bold = true;
                            break;
                    }
                    table.Rows.Add(row);
                }

                TableFooterRow row2 = new TableFooterRow();
                TableCell cell2 = new TableCell();
                cell2.Text = "<span style\"text-align: right; width: 100%;\">Total = <b>" + runningtotal.ToString("N2") + "</b></span>";
                cell2.ColumnSpan = 6;
                row2.Cells.Add(cell2);
                table.Rows.Add(row2);

                var update = (from s in dc.Invoices where s.id.ToString() == Request.QueryString["id"] select s).Single();
                update.total = runningtotal;

                dc.SubmitChanges();
                datatable.Controls.Clear();
                datatable.Controls.Add(table);
            }
            else
            {
                Response.Redirect("Invoices.aspx");
            }
        }

        protected void Page_Load(object sender, EventArgs e)
        {



        }


        protected void lnkdel_Command(object sender, CommandEventArgs e)
        {
            string connection = ConfigurationManager.ConnectionStrings["TPRTestConnectionString"].ConnectionString;


            using (SqlConnection conn = new SqlConnection(connection))
            {
                SqlCommand comm = new SqlCommand("DELETE FROM InvoiceItem WHERE id = @id", conn);
                comm.Parameters.AddWithValue("@id", e.CommandArgument.ToString());
                conn.Open();
                try
                {
                    comm.ExecuteNonQuery();
                }
                catch (Exception ex)
                {
                    Response.Write(ex);
                }
            }
    }

注意我说出2的关键行为张贴在这里，只是要指出，我已经试过了两条线这就是说，既不工作：(

Answer 1

你需要添加的控制上的 每 回发。你似乎只有创造他们在最初的获取(查询串检查)。在后回来，这些控制措施从未得到重建的所有事件发生火灾。

这是众所周知的反直觉的，但是同时ASP.NET 弯曲超过退让你觉得的实例的网页类同之间的两HTTP请求，现实情况是，他们都不相同。创建一个新实例。它看起来就像你正试图避免加入的动态生成的控制多倍--想你不想重复。现实是，你会 从来没有 得到重复时加入的动态生成的控制生命周期方法，例如 OnInit() 因为它总是一个新的实例的网页分类，因而这些动态生成的控制都不见了。

因为这通常是透明的开发是所有的管制代码前都自动重新产生对于你的初始请求与每一个职位。对于你的动态创建的控制，您有这一行：

if (Request.QueryString["id"] != null) { ... }

除非你做些特别的东西，即"id"属性不会在查询串上回发。这意味着没有代码 if 块进行运行的后背(当你的事件实际上是火灾。) 这意味着你 if-签在顶部应该删除。 所有 该代码应该为每一个要求(获得 和 员额)。

Answer 2

只是说我已经创建了一个解决方法-仅仅创建一个简单的链接的网页，随着一串查询包含id的行删除