find a control of user control from a aspx page

Question

0.00/5 (No votes)

See more:

hi experts
i have a text box in a user control. my user control is in master page. i want to access this text box from default.aspx.

how i can access to text box?

thanks in advance

Posted 27-Aug-13 1:28am

zinajoonjooni

Updated 27-Aug-13 1:29am

v2

Add a Solution

Comments

Maarten Kools 27-Aug-13 7:38am

You can just loop recursively through the child controls of a certain parent control (be it a page, or the user control itself) until you find the control you're looking for. Or if the TextBox is a direct child of the user control, just use the FindControl[^] method.

4 solutions

Solution 4

XML

for that you need to put usercontrol in other folder then use it check my code as below
in webconfig file
 &lt;pages masterPageFile="~/Site.Master"&gt;
      <controls>
        <add src="~/UserControls/WebUserControl1.ascx" tagname="userControltag" tagprefix="uc1"></add>
      </controls>

    &lt;/pages&gt;

in site master
&lt;uc1:userControltag ID="usercontrol"  runat="server" /&gt;

in sitemaster.cs
you can access usercontrol.

please follow folder structure like usercontrol should be put in other fodler

UserControl ::- WebUserControl1.ascx

Posted 28-Aug-13 18:34pm

pradippatel99

Updated 28-Aug-13 18:42pm

v2

Solution 3

This is also fine.

TextBox txt = ((UserControl)Master.FindControl("TextBox1")).FindControl("TextBox1") as TextBox;

Posted 27-Aug-13 2:11am

Thomas ktg

Comments

zinajoonjooni 28-Aug-13 1:11am

where is my user control's name here?

Thomas ktg 29-Aug-13 1:25am

I have given same name for both userControl and TextBox. The TextBox1 in the first place represents the usercontrol.

TextBox txt = ((UserControl)Master.FindControl("UserControlTextBox1")).FindControl("TextBox1") as TextBox;

Solution 2

thanks pradippatel99
its my code:

C#

if (filAvatar.HasFile)
                {
                    BLL.Users.UploadAvatarForAlbum(Convert.ToInt32(Page.User.Identity.Name), filAvatar, 0, strAddress, 0);

                    ((this.Master.FindControl("UserLoginStatus") as UserControl).FindControl("imgAvatar") as Image).ImageUrl = "pqr";

}

but when i run it i got this error:

Object reference not set to an instance of an object.

i add my user control in web.config:

HTML

<add src="~/UserControls/UserLoginStatus.ascx" tagname="UserLoginStatus" tagprefix="abs" />

Posted 27-Aug-13 1:51am

zinajoonjooni

Updated 27-Aug-13 18:19pm

v4

Comments

Anuja Pawar Indore 27-Aug-13 7:58am

Use Improve question link to update your question. Don't add your question into an answer block.

ahammed056 26-Oct-16 5:06am

hi i had problem on cross page post back....

i had page with saved.aspx in that user control consists of gridview...

i want to display the usercontrol grid view new viewprofile.aspx

the codes are

string command = e.CommandName;
string mprofilecode = e.CommandArgument.ToString();
switch (command)
{

case "viewprofile":
gvsaveProfile.Visible = true;
Panel_saveprofile.Visible = true;
userentitys uur = new userentitys();
uur.Profilecode = Session["Profilecode"].ToString();
dataaccesslayer dbfound = new dataaccesslayer();
this.Mp_view_profile.Uc_viewprofile(mprofilecode);
dbfound.rpv(uur, mprofilecode);
break;

<asp:LinkButton ID="LinkButton1" runat="server" CssClass="fa fa-search" PostBackUrl="~/viewprofile.aspx" CommandName="viewprofile" CommandArgument='<%# Eval("profilecode") %>'> View Profile

viewpage.aspx page load

if (this.Page.PreviousPage != null)
{
GridView GridView1 = (GridView)this.Page.PreviousPage.FindControl("Panel_viewprofile").FindControl("Mp_view_profile").FindControl("gvieviewprofile");
}

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

pradippatel99 · Accepted Answer · 2013-08-27T01:40:00

Solution 1

hi
i have a user control which contain below textbox having id "txtname"

and i have change textbox value from default.aspx page like as below

((this.Master.FindControl("usercontrol") as UserControl).FindControl("txtname") as TextBox).Text = "pqr";

Posted 27-Aug-13 1:40am

pradippatel99

Comments

zinajoonjooni 27-Aug-13 7:54am

i add my user control in web.config

<add src="~/UserControls/UserLoginStatus.ascx" tagname="UserLoginStatus" tagprefix="abs">

pradippatel99 27-Aug-13 8:43am

i have registered user control in web config file then i used.
it works.
can you check which control you cannot find user control or image of usercontrol ?

zinajoonjooni 28-Aug-13 0:12am

its my user control in web config:
add src="~/UserControls/UserLoginStatus.ascx" tagname="UserLoginStatus" tagprefix="abs"

it cannot find user control.