|
Hi!
Is it possible to index textboxes? What I mean is: instead of having TextBox1, TextBox2 and TextBox3 have something like an array of textboxes - TextBox(1), TextBox(2), TextBox(3) - and be able to accessed them with, for example, a FOR statement:
for (int i=0; i!=4; i++)
{
TextBox(i).Text = "hello";
}
Thank you for helping!
|
|
|
|
|
Yes it is, but obviously you won't be able to use it from the designer.
You can create them like
class MyForm : Form
{
private TextBox []boxes;
public MyForm(int count)
{
boxes = new TextBox[count];
foreach(TextBox box in boxes)
{
this.Controls.Add(box);
}
}
}
Regards
Senthil
_____________________________
<font face="Verdana" size="1"><a href="http://blogs.wdevs.com/senthilkumar">My Blog</a> | <a href="http://www.codeproject.com/script/articles/list_articles.asp?userid=492196">My Articles</a> | <a href="http://geocities.com/win_macro">WinMacro</a></font>
|
|
|
|
|
|
Yes. If you are creating the text boxed dynamically then it is easy enough to put them in an array. If the text boxes are created in the designer then you need to populate an array after InitialiseComponent* is called - the array should be declared as a member variable in your form class. You can then refer to the array and iterate through it.
* DISCLAIMER: This may not be the exact name of the method, I'm going from memory here. In any event I am referring to the method that Visual Studio modifies when you make changes in the designer.
My: Blog | Photos
WDevs.com - Open Source Code Hosting, Blogs, FTP, Mail and More
|
|
|
|
|
|
An alternative approach could be to generate the array dynamically, the framework is already storing references to all of the controls, both static and dynamic, so you can just recurse through the ControlCollections pulling out all of the ones of the required type.
<br />
private void searchControlTree(ControlCollection colControls , ArrayList allCtls, System.Type ctlType)<br />
{<br />
foreach (Control c in colControls )<br />
{<br />
if ( c.GetType() == ctlType)<br />
allCtls.Add(c) ;<br />
<br />
if (c.Controls.Count > 0 )<br />
searchControlTree(c.Controls, allCtls, ctlType ) ;<br />
}<br />
}<br />
<br />
public ArrayList findControlByType( System.Type ctlType)<br />
{<br />
ArrayList allCtls = new ArrayList();<br />
searchControlTree(this.Controls, allCtls, ctlType) ;<br />
<br />
return allCtls ;<br />
}<br />
<br />
ArrayList a = findControlByType( typeof(TextBox)) ;
If you need a real array at the end the ArrayList has a ToArray() method. If you combine this approach to finding the controls together with the control Name or Tag properties you can filter out whatever controls you want.
Hope this is usefull Jackson
|
|
|
|
|
I think there is better way to use for or foreach for with textbox.
Example make the textboxes inside a groupbox and then:
<br />
<br />
foreach(Control c in gb)<br />
{<br />
if(c.GetType().ToString()=="System.Windows.Forms.TextBox") <br />
{<br />
c.Text="Hello";<br />
}<br />
}<br />
I often use this trick to clear all trextboxes in my form :->
|
|
|
|
|
Hello you!
I need Your HELP.
I have my own TreeView Nodes Editor, in order to add 'MyTreeNode'', like node which are ComboBox and so.
I have two classes. one inherit from 'TreeView' and the other from 'TreeNode'.
In 'MyTreeView' i override 'Nodes' (keyword- new) in order to open my custom editor.
In public partial class MyTreeView : TreeView, I use the next statement:
[
DesignerSerializationVisibility(DesignerSerializationVisibility.Content),
Editor(typeof(NodesTypeEditor), typeof(UITypeEditor)),
]
new public TreeNodeCollection Nodes
{
get { return base.Nodes; }
set
{
TreeNode[] myTreeNodeArray = new TreeNode[((TreeNodeCollection)value).Count];
((TreeNodeCollection)value).CopyTo(myTreeNodeArray, 0);
((TreeNodeCollection)value).Clear();
this.Nodes.AddRange(myTreeNodeArray);
}
}
but the DesignerSerializationVisibility create the next code, which produce casting error on run time:
MyCheckTreeNode myCheckTreeNode1 = ((MyCheckTreeNode)(new TreeNode("TreeNode")));
I need it to be :
MyCheckTreeNode myCheckTreeNode1 = new MyCheckTreeNode("TreeNode");
In the editor i use TreeView and PropertyGrid. the code in 'Add CheckBox Node' is:
treeView1.Nodes.Add(new MyCheckTreeNode("TreeNode"));
How can i fix it???
Please Help me. I need it fast.
Thanks,
Ran S'
|
|
|
|
|
Hi, I have a form, let's say Form1, in Form1 I have some code in its Load event handler, now I want to close Form1 if the code in its Load event handler throws an exception.
this.close() simply doesn't work from inside the Load event handler.
Thanks for any suggestions...
(a.k.a. Wal2k)
www.wal2k.com
|
|
|
|
|
I don't know why do you want to close a form immediatelly, but the metod is:
<br />
private void Form1_Load(object sender, System.EventArgs e)<br />
{<br />
this.Close();<br />
}<br />
It must works!
|
|
|
|
|
What about
Application.Exit();
|
|
|
|
|
Simply you can :
void form1_load(object sender,eventargs e)
{
CloseIt();
}
void CloseIt()
{
this.Close();
}
|
|
|
|
|
hi,
Waleed wrote:
now I want to close Form1 if the code in its Load event handler throws an exception.
The reason why your form didn't close ( but crashed ) is because exceptions change flow of your program. You have to wrap exception throwing code with try-catch block.
void Page_Load(...)
{
try
{
YourCodeWhichThrowsAndException();
}
catch{ this.Close(); }
}
Does it help?
David
|
|
|
|
|
A much better method would be to determine if your form needs to be displayed before you even instantiate it.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
|
|
|
|
|
hello, thanks for all your replies .. I'm afraid though the problem hasn't been solved .. as I said in my first post, using this.Close() doesn't work at all, doesn't matter if you call it directly from the Load event handler (let's say Form1_Load) or put it in a method and call this method from within Form1_Load.. it still doesn't work!
(a.k.a. Wal2k)
www.wal2k.com
|
|
|
|
|
I agree with Dave Kreskowiak, but in this case I have to put all the code in another form, for example if I have two forms, Form1 and Form2, and I want to open Form2 from within Form1, in this case I have to put all the code I have in Form2_Load in that place in Form1 where I create a new instance of Form2, this is something I don't want to do. To make things clearer, let's say I have a form on which I display data retrieved from a database, I put the code that retrieves the data in the Load event handler for that form, now what I want is that if something goes wrong while retrieving the data, the form is closed before it's even shown to the user.
(a.k.a. Wal2k)
www.wal2k.com
|
|
|
|
|
There could be two approaches that I can think of that may be of use. The first would involve creating a Timer event, and if the data fails, start the Timer and allow the Load event to close and maybe a second or something liket that before firing it to close the Form. The second is to use a ShowDialog() error box inside the load before the form itself gets loaded, and upon the error window exiting, close the form. I have done the second, however using Application.Exit() so it may not work for simply closing the form. I would say the timer is the best approach.
Also do you just have one form that you want to close or is a child form (havent read through the posts) because if I do this.Close() in the main or child in the Load it does close it. Maybe you have to Garbage Collect or cleanup the variables?
|
|
|
|
|
Then put the code into a seperate public function of Form2 and call it prior to showing it (either catch the exception in Form1 or catch it in the function and return False indicating something went wrong).
|
|
|
|
|
i need to get more information about png files becouse i know it support vector object datas over the image bitmap inside.
How can i create a png with that data (like it does fireworks).
Or are there web side that give information about this file format?
|
|
|
|
|
|
Hi all,
I am building a spell checker web application in c# using the InteropServices Word.dll. It works fine on my localhost but it doesn't work on a web server remotely.
What do I have to do in order to make it work?
Please Help
Tony
|
|
|
|
|
|
Kumar,
Thanks for that information. The office components are installed on the web server but still I cannot access the spell checker remotely. The web application hangs when the spell checker is called.
Any more ideas will be much appreciated
Thanks
Tony
|
|
|
|
|
Hello
Im trying to make a function that will access a label on an aspx file. I think im supposed to use something along the lines
System.Web.UI.WebControls.Label etc
Does anyone know if im on the right track or way off? Any help greatly appreciated!
|
|
|
|
|
livez wrote:
Im trying to make a function that will access a label on an aspx file
From a windows application?
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
