Home > Developer > ASP

Asp.net dynamic management (add, delete, read) Controls

Source: Internet
Author: User
Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Read more ＞

Oh, you just need to talk about it.Code.

I. Page code

 

<% @ Page Language = "C #" autoeventwireup = "true" codefile = "test. aspx. cs" inherits = "test" %>

<! 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 id = "head1" runat = "server">
<Title> </title>
</Head>
<Body>
<Form ID = "form1" runat = "server">
<Div>
<Asp: button id = "button3" runat = "server" text = "assign value" onclick = "button3_click"/>
<Asp: button id = "button2" runat = "server" onclick = "button2_click" text = "value"/>
<Table width = "280px">
<Tr>
<TD>
<Asp: Panel id = "Panel1" runat = "server">
</ASP: Panel>
<Asp: Label id = "label1" runat = "server" text = "label"> </ASP: Label>
<Asp: button id = "button1" runat = "server" text = "add" onclick = "button#click"/>
</TD>
</Tr>
</Table>
</Div>
</Form>
</Body>
</Html>

 

 

Ii. Background code

 

Using system;
Using system. configuration;
Using system. Data;
Using system. Web;
Using system. Web. Security;
Using system. Web. UI;
Using system. Web. UI. htmlcontrols;
Using system. Web. UI. webcontrols;
Using system. Web. UI. webcontrols. webparts;

Public partial class test: system. Web. UI. Page
{
Protected void page_load (Object sender, eventargs E)
{
If (! Ispostback)
{
Viewstate ["num"] = 3;
}

Loadctrl (Int. parse (viewstate ["num"]. tostring ()));
}

/// <Summary>
/// Set the value
/// </Summary>
Private void settxtvalue ()
{
Viewstate ["num"] = 5;
Loadctrl (Int. parse (viewstate ["num"]. tostring ()));

For (INT I = 0; I <5; I ++)
{
Textbox TXT = panel1.findcontrol ("TXT" + I. tostring () as textbox;
TXT. Text = I. tostring ();
}
}

/// <Summary>
/// Load controls
/// </Summary>
/// <Param name = "num"> </param>
Private void loadctrl (INT num)
{
Panel1.controls. Clear ();

For (INT I = 0; I <num; I ++)
{
Textbox TXT = new Textbox ();
TXT. ID = "TXT" + I. tostring ();
TXT. Text = request. Form [TXT. clientid];

Linkbutton lbtn = new linkbutton ();
Lbtn. ID = "lbtn" + I. tostring ();
Lbtn. commandargument = I. tostring ();
Lbtn. Text = "delete ";
Lbtn. Click + = new eventhandler (btndel_click );

Literal LTL = new literal ();
LTL. ID = "LTL" + I. tostring ();
LTL. Text = "<br/> ";

panel1.controls. add (txt);
panel1.controls. add (lbtn);
panel1.controls. add (LTL);
}< BR >}

///


/// Delete
///
///
//
protected void btndel_click (Object sender, eventargs e)
{< br> linkbutton lbtn = sender as linkbutton;
string id = lbtn. commandargument;
textbox TXT = panel1.findcontrol ("TXT" + id. tostring () as textbox;
literal LTL = panel1.findcontrol ("LTL" + id. tostring () as literal;

Panel1.controls. Remove (txt );
Panel1.controls. Remove (lbtn );
Panel1.controls. Remove (LTL );
Viewstate ["num"] = int. parse (viewstate ["num"]. tostring ()-1;

Setcontrolsid ();
}

///


/// add
///
///
//
protected void button#click (Object sender, eventargs e)
{< br> viewstate ["num"] = int. parse (viewstate ["num"]. tostring () + 1;
loadctrl (Int. parse (viewstate ["num"]. tostring ();
}

/// <Summary>
/// Value
/// </Summary>
/// <Param name = "sender"> </param>
/// <Param name = "E"> </param>
Protected void button2_click (Object sender, eventargs E)
{
Label1.text = string. empty;

For (INT I = 0; I <(INT) viewstate ["num"]; I ++)
{
Label1.text + = (textbox) (panel1.findcontrol ("TXT" + I. tostring (). text;
}
}

/// <Summary>
/// Reset the Control ID
/// </Summary>
Private void setcontrolsid ()
{
Int I = 0;

Foreach (control CTL in panel1.controls)
{
If (CTL. GetType (). Name. tolower () = "textbox ")
{
CTL. ID = "TXT" + I. tostring ();
}
If (CTL. GetType (). Name. tolower () = "linkbutton ")
{
CTL. ID = "lbtn" + I. tostring ();
}
If (CTL. GetType (). Name. tolower () = "literal ")
{
CTL. ID = "LTL" + I. tostring ();

I ++;
}
}
}

/// <Summary>
/// Assign a value
/// </Summary>
/// <Param name = "sender"> </param>
/// <Param name = "E"> </param>
Protected void button3_click (Object sender, eventargs E)
{
Settxtvalue ();

}
}

 

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
add parental controls to iphone add update delete in php php add delete update mysql jira add ons project management php mysql add edit delete same page php add edit delete search code add user sql server management studio
Related Article
ASP. NET core combined with consul cluster &docker to rea...
ASP. NET Core SignalR uses a generic hub to gracefully invoke...
Integration testing of ASP. NET Core Webapi using Xunit
CKEDITOR + CKFINDER image upload configuration (C #/asp.net/php)

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

What's Trending
Top 10 Tags
datastax versions naming convention zookeeper client class definition md5 microsoft sql server 2005 data structures exception handling error handling
Top 10 Keywords
microsoft download center down wordpress address url site address url wordpress address url windows installer 4 0 download 302 not found web address url definition site address url wordpress db2 integer mac os installation step by step pdf abbreviation for return

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

Get Started for Free

  • Sales Support

    1 on 1 presale consultation

    Chat Contact Sales

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

    Open a Ticket

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.

    Learn More