如何在动态文本框中应用验证？ [英] How can i apply validation on dynamic text box?
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问题描述
这是我的代码。
aspx页面：
here is my code.
aspx page:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default3.aspx.cs" Inherits="Default3" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Button ID="btnAddAddress" runat="server" Text="Add a New Address" OnClick="btnAddAddress_Click" />
<asp:Button ID="btnSave" runat="server" Text="Save These Addresses" OnClick="btnSave_Click" />
<br />
<br />
<asp:GridView ID="GridView1" runat="server">
</asp:GridView>
<asp:Panel ID="pnlAddressContainer" runat="server">
</asp:Panel>
<br />
</div>
</form>
</body>
</html>
cs page：
cs page:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
public partial class Default3 : System.Web.UI.Page
{
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["DBConnection"].ToString());
static DataTable dtabl;
DataColumn no;
DataColumn address;
protected void Page_PreLoad(object sender, EventArgs e)
{
// Use ViewState to store the number of the addresses.
if (ViewState["AddressCount"] == null)
{
ViewState["AddressCount"] = 0;
}
// Get the the number of the addresses.
int addresscount = (int)ViewState["AddressCount"];
// Iterat adding addresses input component.
for (int i = 0; i < addresscount; i++)
{
if (addresscount == 3)
{
btnAddAddress.Visible = false;
}
AddAdress((i + 1).ToString());
}
}
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
dtabl = new DataTable();
no = new DataColumn("no", Type.GetType("System.Int32"));
address = new DataColumn("address", typeof(string));
dtabl.Columns.Add("no");
dtabl.Columns.Add("address");
}
}
protected void btnAddAddress_Click(object sender, EventArgs e)
{
if (ViewState["AddressCount"] != null)
{
int btncount = (int)ViewState["AddressCount"];
//dynamic validator = new RequiredFieldValidator();
// Add a new component to pnlAddressContainer.
if (btncount == 4)
{
btnAddAddress.Visible = false;
}
else
{
AddAdress((btncount + 1).ToString());
ViewState["AddressCount"] = btncount + 1;
//validator.ID = ds.Tables(0).Rows(i).Item(0) + "_Validator";
//validator.ControlToValidate = myTextBox.ID;
//validator.ErrorMessage = ds.Tables(0).Rows(i).Item(2) + " required ";
//validator.Display = ValidatorDisplay.Dynamic;
//this.TextBoxControlPlaceHolder.Controls.Add(validator);
}
}
else
{
Response.Write("ERROR");
Response.End();
}
}
protected void btnSave_Click(object sender, EventArgs e)
{
int addresscount = (int)ViewState["AddressCount"];
// Display all the addresses on the page.
// This is an imitation that we update these addresses into database.
for (int i = 0; i < addresscount; i++)
{
TextBox tb = pnlAddressContainer.FindControl("TextBox" + (i + 1).ToString()) as TextBox;
string address = tb.Text == "" ? "Empty" : tb.Text;
Response.Write("Address" + (i + 1).ToString() + " is " + address + ".<br />");
string Add1 = address.ToString();
DataRow row = dtabl.NewRow();
//dtabl.Rows[i][0] = Session["slctans"].ToString();
//dtabl.Rows[i+1][0] = i;
//dtabl.Rows[i+1][1] = address.ToString();
row[0] = i.ToString();
row[1] = address;
dtabl.Rows.Add(row);
ViewState["P" + (i + 1)] = address;
}
Session["dtabl"] = dtabl;
if (Session["dtabl"] != null)
{
//string p1, p2, p3, p4;
dtabl = (DataTable)Session["dtabl"];
//SqlDataAdapter da = new SqlDataAdapter();
//DataSet ds = new DataSet();
//da.Fill(dtabl);
GridView1.DataSource = dtabl;
GridView1.DataBind();
if (ViewState["P1"] != null)
{
ViewState["P1"] = ViewState["P1"].ToString();
}
else
{
ViewState["P1"] = "";
}
if (ViewState["P2"] != null)
{
ViewState["P2"] = ViewState["P2"].ToString();
}
else
{
ViewState["P2"] = "";
}
if (ViewState["P3"] != null)
{
ViewState["P3"] = ViewState["P3"].ToString();
}
else
{
ViewState["P3"] = "";
}
if (ViewState["P4"] != null)
{
ViewState["P4"] = ViewState["P4"].ToString();
}
else
{
ViewState["P4"] = "";
}
// SqlConnection con = new SqlConnection("initial catalog=UTS003/SQLEXPRESS;data source=Test; integrated security=yes");
SqlCommand com = new SqlCommand("Insert into Phone values('"+ViewState["P1"]+"','"+ViewState["P4"]+"','"+ViewState["P4"]+"','"+ViewState["P4"]+"')", con);
con.Open();
com.ExecuteNonQuery();
con.Close();
Response.Write("<script>alert('inserted...')</script>");
//if (dtabl.Rows[0] != null)
//{
// p1 = dtabl.Rows[0][1].ToString();
//}
// else
//{
// p1 = "";
//}
//int p1=dtabl.Rows[i][1].ToString()
}
// Clear the ViewState.
ViewState["AddressCount"] = null;
}
public void Insert()
{
dtabl = (DataTable)Session["dtabl"];
if (dtabl != null)
{
for (int i = 0; i < dtabl.Rows.Count; i++)
{
}
}
}
protected void AddAdress(string id)
{
// Label to display address No.
Label lb = new Label();
lb.Text = "Address" + id + ": ";
// TextBox for inputting the address.
TextBox tb = new TextBox();
tb.ID = "TextBox" + id;
if (id != "1")
{
// Have a try on the code without this condition.
// We will get a odd behaviour on this after clicking Save button.
tb.Text = Request.Form[tb.ID];
}
// Button to check the Address.
// Also to illustrate how to bind events to a dynamic control.
Button btn = new Button();
btn.Text = "Check";
btn.ID = "Button" + id;
// Bind event using += operator.
btn.Click += new EventHandler(ClickEvent);
Literal lt = new Literal() { Text = "<br />" };
// Add these controls to pnlAddressContainer as a component.
pnlAddressContainer.Controls.Add(lb);
pnlAddressContainer.Controls.Add(tb);
pnlAddressContainer.Controls.Add(btn);
pnlAddressContainer.Controls.Add(lt);
}
protected void ClickEvent(object sender, EventArgs e)
{
// Get button instance from sender.
Button btn = sender as Button;
// Get TextBox instance and its value via FindControl() method.
TextBox tb = pnlAddressContainer.FindControl(btn.ID.Replace("Button", "TextBox")) as TextBox;
string address = tb.Text == "" ? "Empty" : tb.Text;
// Alert a msg to show the address in the corresponding TextBox.
System.Text.StringBuilder sb = new System.Text.StringBuilder();
sb.Append("<script type=\"text/javascript\">");
sb.Append("alert(\"Address" + btn.ID.Replace("Button", "") + " is " + address + ".\");");
sb.Append("</script>");
if (!ClientScript.IsClientScriptBlockRegistered(this.GetType(), "AlertClick"))
{
ClientScript.RegisterClientScriptBlock(this.GetType(), "AlertClick", sb.ToString());
}
}
}
plz给我解决方案..！
plz give me solution..!
推荐答案
尝试
Try
RequiredFieldValidator rfv1 = new RequiredFieldValidator();
rfv1.ID = "rfv1";
rfv1.ControlToValidate = tb.ID;
rfv1.Text = "please enter a value for tb1";
rfv1.Validate();
Response.Write("<br>Page.IsValid: " + Page.IsValid);
亲爱的Gaurav，
假设示例textbox1是你的textbox id意思，你可以在Page_load（）事件中添加以下代码。
Dear Gaurav,
Let's say an example textbox1 is your textbox id means, you can add the following code in the Page_load() event.
RequiredFieldValidator rfvtxt = new RequiredFieldValidator();
rfvtxt.ControlToValidate = textbox1.ID;
rfvtxt.ErrorMessage = "Please enter the values";
rfvtxt.ToolTip = "Please enter the Comments";
rfvtxt.SetFocusOnError = true;
rfvtxt.Text = "*";
rfvtxt.EnableClientScript = true;
rfvtxt.Attributes.Add("style", "color: Red;");
问候，
BlueSathish
Regards,
BlueSathish
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