hi there, i am writing a program with LOTS of textboxes in it.. my problem
is when i try to clean the textboxes with foreach it gives error.. heres how
my code looks like:
private void ClearText ()
{
foreach (textbox t in this.controls)
{
t.text = ""
}
}
but it doesnt work! it was working quite good on visual basic.net but this
code seems not working with c#?! 4 5353
Not all the controls in this.Controls are TextBox controls. When you
iterate through them, you get an InvalidCastExce ption because a non-TextBox
control is being assigned to t, a TextBox variable.
foreach (Control c in this.Controls)
{
if (c is TextBox)
{
TextBox t = (TextBox) c;
t.Text = "";
}
}
"Serdar C." <se*****@intera ktif.gen.tr> wrote in message
news:OQ******** ******@TK2MSFTN GP11.phx.gbl... hi there, i am writing a program with LOTS of textboxes in it.. my problem is when i try to clean the textboxes with foreach it gives error.. heres
how my code looks like:
private void ClearText ()
{ foreach (textbox t in this.controls) { t.text = "" } }
but it doesnt work! it was working quite good on visual basic.net but this code seems not working with c#?!
Scott English wrote: Not all the controls in this.Controls are TextBox controls. When you iterate through them, you get an InvalidCastExce ption because a non-TextBox control is being assigned to t, a TextBox variable.
foreach (Control c in this.Controls) { if (c is TextBox) { TextBox t = (TextBox) c; t.Text = ""; } }
Couldn't you do:
foreach (TextBox t in this.Controls)
?
No. The foreach command will iterate through ALL the objects in the
Controls collection and attempt to cast them to a TextBox. If any of them
aren't a TextBox, then an InvalidCastExce ption will occur. Declaring the
type of variable as TextBox doesn't filter the contents of Controls
(although that would be really nice).
"Julie" <ju***@nospam.c om> wrote in message
news:40******** *******@nospam. com... Scott English wrote: Not all the controls in this.Controls are TextBox controls. When you iterate through them, you get an InvalidCastExce ption because a
non-TextBox control is being assigned to t, a TextBox variable.
foreach (Control c in this.Controls) { if (c is TextBox) { TextBox t = (TextBox) c; t.Text = ""; } }
Couldn't you do:
foreach (TextBox t in this.Controls)
?
In addition to the problem Scott E pointed out, if you have your
textboxes inside of other controls you may need a little more code to
get to all of the textbox controls (see http://www.odetocode.com/Code/71.aspx).
--
Scott
On Fri, 2 Apr 2004 20:44:34 +0300, "Serdar C."
<se*****@intera ktif.gen.tr> wrote: hi there, i am writing a program with LOTS of textboxes in it.. my problem is when i try to clean the textboxes with foreach it gives error.. heres how my code looks like:
private void ClearText ()
{ foreach (textbox t in this.controls) { t.text = "" } }
but it doesnt work! it was working quite good on visual basic.net but this code seems not working with c#?! This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
by: Savvas |
last post by:
Hi everybody,
I have a lot of textboxes on my form and a "Clear" button. Is there a
way with a for loop or something to clear the textboxes, instead of
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Thanks a lot
|
by: Serdar C. |
last post by:
hi there, i am writing a program with LOTS of textboxes in it.. my problem
is when i try to clean the textboxes with foreach it gives error.. heres how
my code looks like:
private void ClearText ()
{
foreach (textbox t in this.controls)
{
t.text = ""
|
by: Ali |
last post by:
I used to clear my page's control in Visual Studio 2003 using code like this:
Dim c As Control
For Each c In Page.Controls(1).Controls
If TypeOf c Is TextBox Then
CType(c, TextBox).Text = Nothing
End If
If TypeOf c Is DropDownList Then
CType(c, DropDownList).SelectedIndex = 0
End If
Next
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Hi
I'm a beginner in ASP.NET.
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Am i doing something wrong? If the code is wrong how can i clear the
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try
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Hey:
I am a rookie developer so please bear with me.
I want to develop a small application for my office but I am having trouble
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If I make a textbox required and then trigger it by not entering in any data
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last post by:
foreach (TextBox tb in this.Controls)
tb.Dispose();
What this does is clears every other textbox on the form.
Suppose there are 10 textboxes... this will dispose the 1st one, then i
guess whatever list of textboxes it's maintaining gets shifted, so the
2nd is now the 1st in the list, so when it goes to the next one, it is
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last post by:
This is reference to Vandana Sridhar's refreshing the form
http://www.thescripts.com/forum/thread619976.html
The code displayed below did work.
Dim Ctrl As Control
For Each Ctrl In Me.Controls
If TypeOf Ctrl Is TextBox Then Ctrl.Text = ""
Next
But I have three frames inside the form
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