如何从动态文本框中重新导出值

Question

我编写了代码来显示下面的动态文本框，代码工作正常。但是如何在另一个服务器单击事件中获取这些文本框的值。我无法在按钮 btnUpdate_ServerClick 单击事件中检索值。以下代码不起作用。

 protected void ClickShowModal(object sender, EventArgs e)
        {
            LinkButton btnEdt = (LinkButton)sender;
            string[] arguments = btnEdt.CommandArgument.Split(';');

            mdllblUniqueNumber.InnerText = arguments[0];
            mdllblItemCode.InnerText = arguments[1];
            mdltxtScanLocation.Value = arguments[4];
            mdltxtReceiveQuantity.Value = arguments[5];
            string managed_serial = arguments[6];
            int open_qty = Convert.ToInt32(arguments[7]);

            if (managed_serial == "Y")
            {
                mdltxtReceiveQuantity.Visible = false;

                for (int i = 1; i <= open_qty; i++)
                {
                    // Create a new TextBox
                    TextBox textBox = new TextBox();
                    textBox.ID = "mdltxtSerialNumber" + i;
                    textBox.Attributes["placeholder"] = "Key in Serial Number";
                    textBox.CssClass = "form-control";
                    // Add the TextBox to the Panel
                    panel_serial.Controls.Add(textBox);

                    LiteralControl spacerDiv = new LiteralControl("<div style='height: 5px; clear: both;'></div>");
                    panel_serial.Controls.Add(spacerDiv);

                }
            }

            //btnResetToInitial.CommandArgument = arguments[4] == arguments[2] ? arguments[2] : arguments[3];

            ScriptManager.RegisterStartupScript(this, this.GetType(), "ModalView", "<script>$(function() { $('#mdlSLRQ').modal('show'); $('#mdlSLRQ').focus(); $('#mdlSLRQ').on('shown.bs.modal', function () { $(this).find('[autofocus]').focus();}); });</script>", false);
        }

 protected void btnUpdate_ServerClick(object sender, EventArgs e)
        {TextBox tb = new TextBox();
                    for (int i = 1; i < open_qty; i++)
                    {
                        tb = (TextBox)panel_serial.FindControl("mdltxtSerialNumber" + i.ToString());
                        string value = tb.Text; //You have the data now
                    }
}

Answer 1

我设法用

Control.ControlCollection.Find(String, Boolean)

方法让它工作：

var tbName = "mdltxtSerialNumber" + i; // no need to call ToString, it;s automatically converted when concatenating with string

var ctrl = panel1.Controls.Find(tbName, true)
    .FirstOrDefault();

if(ctrl is TextBox textBox)
{
    MessageBox.Show("Found text box " + tbName + " with text " + textBox.Text);
}