c# - 在aspx.cs(在后面的代码)asp.net中创建RequiredFieldValidator

Question

我有一个TextBox，在其中添加一个数字，并在buttonclick上创建新的文本框，具体取决于我在第一个TextBox中输入的数字。

例如，我在TextBox中放入5，然后按按钮，我的页面上会出现5个新的文本框。

现在，我试图在所有创建的文本框上创建RequiredFieldValidator，但我无法使其正常工作。我还有另一个按钮可以插入数据库，所有新文本框中的值都是必需的。

有人可以看看我的代码以查看即时消息是否正确，并可能帮助我修改代码以使其正常工作。

protected void btnGenerateControl_Click(object sender, EventArgs e)
    {
        int Count = Convert.ToInt32(Qty.Text);
        for (int i = 1; i <= Count; i++)
        {
            Label lbl = new Label();
            TextBox txtbox = new TextBox();
            RequiredFieldValidator rfv = new RequiredFieldValidator();
            string ValidationGroup = "Group2";
            string ErrorMessage = "Bitte Flotten ID eingeben";

            lbl.Text = " Flotten ID " + (i).ToString() + " ";
            txtbox.EnableViewState = true;
            rfv.ControlToValidate = txtbox.Text;

            rfv.ErrorMessage = ErrorMessage;
            rfv.ValidationGroup = ValidationGroup;
            rfv.ForeColor = System.Drawing.Color.Red;
            Label lbl1 = new Label();
            TextBox txtbox1 = new TextBox();

            txtbox1.EnableViewState = true;
            pnlTextBoxes.Controls.Add(lbl);
            pnlTextBoxes.Controls.Add(new LiteralControl("<input id='txt' name='FlottenID" + i + "'type='text'  />"));
            pnlTextBoxes.Controls.Add(lbl1);
            lbl1.Text = "  Bemerkungen: ";
            pnlTextBoxes.Controls.Add(new LiteralControl("<input id='txt' name='Info" + i + "'type='text'  />"));
            pnlTextBoxes.Controls.Add(new LiteralControl("<br /><br />"));
        }
    }

感谢您的帮助，RequiredFieldValidator现在可以工作，但是在我的数据库中插入时，txtbox和txtbox1中的值为空。我现在用插入物弄错了。

我现在必须在那里更改什么？

protected void btnGenerateControl_Click(object sender, EventArgs e)
    {
        int Count = Convert.ToInt32(Qty.Text);
        for (int i = 1; i <= Count; i++)
        {

            string ValidationGroup = "Group2";
            string ErrorMessage = "Bitte Flotten ID eingeben";

            Label lbl = new Label();
            lbl.Text = " Flotten ID " + (i).ToString() + " ";

            TextBox txtbox = new TextBox();
            txtbox.EnableViewState = true;
            txtbox.ID = "txt" + i;

            TextBox txtbox1 = new TextBox();
            txtbox.EnableViewState = true;
            txtbox.ID = "txt" + i;


            RequiredFieldValidator rfv = new RequiredFieldValidator();
            rfv.ControlToValidate = txtbox.ID;
            rfv.ErrorMessage = ErrorMessage;
            rfv.ID = "rfv" + i;
            rfv.ValidationGroup = ValidationGroup;
            rfv.ForeColor = System.Drawing.Color.Red;

            Label lbl1 = new Label();
            lbl1.Text = "  Bemerkungen: ";




            pnlTextBoxes.Controls.Add(lbl);
            //pnlTextBoxes.Controls.Add(new LiteralControl("<input id='txt' name='FlottenID" + i + "'type='text'  />"));
            pnlTextBoxes.Controls.Add(txtbox);
            pnlTextBoxes.Controls.Add(rfv);
            pnlTextBoxes.Controls.Add(lbl1);
            pnlTextBoxes.Controls.Add(txtbox1);

            //pnlTextBoxes.Controls.Add(new LiteralControl("<input id='txt' name='Info" + i + "'type='text'  />"));
            pnlTextBoxes.Controls.Add(new LiteralControl("<br /><br />"));
        }
    }

    protected void btnAddOrder_Click(object sender, EventArgs e)
    {
        int Count = Convert.ToInt32(Qty.Text);
        for (int i = 1; i <= Count; i++)
        {

            String query = "insert into Orders (CustID, OrderDate, Time, ProductID, ProjectID, Status, FlottenID, Info)values('" + CustID.Text + "','" + OrderDate.Text + "','" + Time.Text + "','" + ProductID.Value + "','" + ProjectID.Value + "','" + Status.Value + "','" + Request.Form["FlottenID" + i.ToString()] + "','" + Request.Form["Info" + i.ToString()] + "')";
            String query1 = "commit;";
            DataLayer.DataConnector dat = new DataLayer.DataConnector("Provider=SQLOLEDB; data source=rzwsrv010;database=event;user ID=event;password=event; Persist Security Info=False");
            dat.DataInsert(query);
            dat.DataInsert(query1);
        }

        Response.Redirect("NewOrder.aspx");
    }

Answer 1

您需要将RequiredFieldValidator控件添加到页面。即：您需要将此添加到某处：

pnlTextBoxes.Controls.Add(rfv)