How to clear textbox on postback

Question

3.00/5 (3 votes)

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Hi,

I am reset all textboxes on button click event. but when I refresh page the control values are remain with them.

I have tried EnableViewState=False option but not working.

I saw this article and it is stated that

ViewState and Postback[^]

"An interesting behavior is if we make a control which implements IPostBackEventHandler interface disabled then the ASP.NET will not process the control during postback. So in the above sample, if we make the Textbox (one with EnableViewState = false) disabled then it will not retain the changed value and behave like a label control."

Now, can anyone tell me how can I work with this interface

Thanks,
Bh@gyesh

Posted 7-May-14 19:33pm

Bh@gyesh

Updated 8-May-14 1:11am

v3

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Comments

King Fisher 8-May-14 1:58am

post your code

This may Help you:
http://www.aspsnippets.com/Articles/Avoid-duplicate-record-insert-on-page-refresh-in-ASPNet.aspx

Bh@gyesh 8-May-14 2:07am

Thanks for the link but it will fire postback unnecessary (i.e. twice for one buttonclick)

King Fisher 8-May-14 7:10am

what you having?

Bh@gyesh 8-May-14 7:13am

<div> 
<table> 
<tr> 
<td> 
Text1 : <asp:TextBox ID="txt1" runat="server" EnableViewState="false" ViewStateMode="Disabled"> 
</td> 
<td> 
Text2 : <asp:TextBox ID="txt2" runat="server" EnableViewState="false"> 
</td> 
<td> 
Text3 : <asp:TextBox ID="txt3" runat="server" EnableViewState="false"> 
</td> 
<td> 
Text4 : <asp:TextBox ID="txt4" runat="server" EnableViewState="false"> 
</td> 
<td> 
<asp:Button ID="btnsubmit" Text="Submit" runat="server" OnClick="btnsubmit_Click" /> 
</td> 
</tr> 
</table> 
</div> 
 
 
protected void Page_Load(object sender, EventArgs e) 
{ 
 
} 
 
protected void btnsubmit_Click(object sender, EventArgs e) 
{ 
 
...... 
txt1.Text = string.Empty; 
txt2.Text = string.Empty; 
txt3.Text = string.Empty; 
txt4.Text = string.Empty; 
 
}

7 solutions

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Snehasish_Nandy · Answer 1 · 2014-05-07T19:39:00

Solution 2

Refer this

clear-textbox-after-postback[^]

How to clear text box values after postback[^]

Hope it will help..

Posted 7-May-14 19:39pm

Snehasish_Nandy

Updated 7-May-14 19:58pm

v2

Comments

Bh@gyesh 8-May-14 1:49am

Thanks for the link but not found solution..!

[no name] 8-May-14 1:55am

Did you tried the second solution given in the link..??

Bh@gyesh 8-May-14 1:56am

yes but not working :(

[no name] 8-May-14 1:58am

Please check the updated link..

Bh@gyesh 8-May-14 2:02am

AutoComplete="off" is not working Sorry :(

[no name] 8-May-14 2:04am

None of the solution given in that link is working..??

Bh@gyesh 8-May-14 2:07am

No..

[no name] 8-May-14 2:09am

Please check once and let me know..

Bh@gyesh 8-May-14 2:12am

Not working dude... I have checked all solutions..

Micky Solve · Answer 2 · 2014-05-08T01:04:00

Solution 5

On page load event try this..

C#

if(IsPostBack)
{
TextBoxControl.Text = String.Empty;
}

Posted 8-May-14 1:04am

Micky Solve

Comments

Bh@gyesh 8-May-14 7:07am

Not working

Siva Hyderabad · Answer 3 · 2014-05-07T19:38:00

Solution 1

C#

void CleareAllcontrolsRecursive(Control container)
   {
       foreach (var control in container.Controls)
       {
           if (control is TextBox)
           {
               ((TextBox)control).Text = string.Empty;
           }        
        
       }
   }

call CleareAllcontrolsRecursive(panelcontrol) method in button click event..
and all controls should be in Panel tag...

Posted 7-May-14 19:38pm

Siva Hyderabad

Comments

Bh@gyesh 8-May-14 1:44am

Thanks for reply Siva.
The problem is when I refresh page in debug mode, so I can see the textbox value in pageload event.
for eg.
I have buttonsubmit event in which I save the records and clear the textboxes like following

protected void btnsubmit_Click(object sender, EventArgs e)
{
<save content="" code="">
....
...

// Clear controls
txt1.Text = string.Empty;
txt2.Text = string.Empty;
txt3.Text = string.Empty;
txt4.Text = string.Empty;

}

Now, when I press refresh, control comes to this event in which I get old values for all textboxes.
I dont want old values. I want empty values, so validation would be fired.

Let me know if you have any doubt.

Micky Solve · Answer 4 · 2014-05-08T01:31:00

Solution 6

Did you have any codes inside page load event?

if(!IsPostBack)
{
//Put that codes here...
}

Posted 8-May-14 1:31am

Micky Solve

Comments

CHill60 8-May-14 7:35am

Would you like to use the "Improve solution" links and update a single solution - for anyone coming across this it is impossible to follow!!

Bh@gyesh 8-May-14 7:47am

Hi, Sorry. I am not getting how to use improve solution?

CHill60 8-May-14 8:38am

Hi - the comment was directed at Micky Solve as he had posted several solutions. You have correctly been using the "Have a question or Comment?" and the "Reply" links.
For information though, if you hover over the bottom right of a solution you have posted a green "Improve solution" link appears (to the left of the report flag). With enough reputation points you will see this for other peoples posts too. There is a similar mechanism for "Improve question"

Bh@gyesh 8-May-14 8:45am

Thanks CHill for information.

Micky Solve 9-May-14 0:06am

Sorry, It was my mistake

CHill60 9-May-14 3:02am

That's ok ... getting to grips with the site is all - at least you are trying to help the OP :-)

Micky Solve · Answer 5 · 2014-05-08T00:12:00

Solution 4

Please try it using jQuery..

$(document).ready(function()
{
$("#TextboxId").val('');
});

Posted 8-May-14 0:12am

Micky Solve

Comments

Bh@gyesh 8-May-14 6:53am

Not working as jquery is called after server call, so at server side at refresh time it retains value. :(

Kan07 · Answer 6 · 2014-05-08T02:30:00

Solution 7

C#

if(!IsPostBack)
{
//not clear textbox
}

else

clear()

Posted 8-May-14 2:30am

Kan07

Comments

Bh@gyesh 8-May-14 8:35am

I can not clear textboxes in else part. If doing this it will take empty value though I have entered value in those textboxes.

RajeeshMenoth · Answer 7 · 2014-05-07T20:38:00

Solution 3

http://aspadvice.com/blogs/joteke/archive/2004/03/15/2273.aspx[^]

<asp:textbox runat="server" id="Textbox1" autocomplete="off" xmlns:asp="#unknown">

http://stackoverflow.com/questions/1301446/clear-textbox-after-postback[^]

C#

if (IsPostBack)
        {
          textbox1.text = "";
         }

try above methods...

Posted 7-May-14 20:38pm

RajeeshMenoth

Comments

Bh@gyesh 8-May-14 2:41am

Already tried Not working...