This question already has answers here:
Add Row Dynamically in TableLayoutPanel
(4 answers)
Closed 3 years ago.
I am trying to make a sort of notification within my form. The panel will consist of a rich textbox followed by two buttons underneath it.
Design of panel
I would need a way of programatically displaying new panels with different data in each one and having it displayed so that it can be scrolled. Initially, i have tried to create a table layout panel and then a panel. I could not figure out how to create a new instance of the panel i created in designer to place it into the table layout.
If there is another simple way of achieving my goal of having a group of controls being added beneath each other programatically i would appreciate it.
You can use this code to generate dynamic controls, but i am just sharing with you sample code.
int n = 10;
Panel[] p=new Panel[n];
int j = 10;
for (int i=0;i<n;i++)
{
j += 10;
p[i] = new Panel();
p[i].BorderStyle = BorderStyle.Fixed3D;
p[i].Height = 100;
p[i].Location = new Point(100,10+j);
this.Controls.Add(p[i]);
}
Related
This question already has answers here:
How to dynamically generate a TextBox control.
(5 answers)
Closed 5 years ago.
First sorry for the inaccurate first question. Now i edited it.
My question/problem is how to save (and keep) controls added at run time in my code? (so if i add label and text box at run time in program it must be in my code like if i implemented it manual)
For example text box added dynamically, but it disappears after reboot the program:
protected void Button1_Click(object sender, EventArgs e)
{
var txt = new TextBox();
txt.ID = "textBox1";
txt.Text = "helloo";
form1.Controls.Add(txt);
var lbl = new Label();
lbl.ID = "label1";
lbl.Text = "I am a label";
form1.Controls.Add(lbl);
// Increase the number added and add the new label and textbox
TotalNumberAdded++;
AddControls(TotalNumberAdded);
}
I planned to implement asp.net web application where can users add additional tasks next to pre-implemented.
Thanks for answers,
Rookie programmer Alex :)
For adding controls at runtime you can try the PlaceHolder control like this:
Button b = new Button();
b.ID = "YourID";
b.Text = "Button";
PlaceHolderTest.Controls.Add(b);
but I dont know any method to add this to your assembly. Maybe you should consider redesigning to use multiple User Controls, which gives you the ability to load different User Controls that contains your controls, meaning you have to create multiple User Controls.
i am using .NET CF making application in window mobile.
need want to add textboc in third column of listview.
googled it but only getting solution for web application.
aint it possible in window mobile ????
code i tried so far... (although it is not working :-) )
for (int i = 0; i < soups.Length; i++)
{
ListViewItem li = new ListViewItem();
li.Text = "RSO" + (i+1);
li.SubItems.Add(arrval[i]);
//in 1st attemp i tried
li.SubItems.Add(new TextBox());
//in 2nd attemped
TextBox tbox = new TextBox();
li.SubItems.Add(tbox);
li.SubItems.Add(Convert.ToString(5 * (i + 1)));
li.SubItems.Add(Convert.ToString(35 * (i + 1)));
lst_option.Items.Add(li);
}
but both ways not working.... bcz of obvious reasons as i am trying to add obj in add() method instead of string :) :)
thnkx in advance
None of the out-of-the-box controls for the Compact Framework (ListView, ListBox, DataGrid, etc) provide this capability. The common work-around is to place a separate TextBox on the form and when a ListViewItem is selected, move the Textbox to cover the location of the subitem/cell, put the subitem/cell text into the TextBox, then make it visible.
I've a UserControl containing a FlowLayoutPanel. A lot of this control instances are needed to be used in a nested form on the Form. I found it out that only 15 nested instances can be created! So I decided to check a more simple model of my control out. The model consist of a GroupBox that contains a Panel:
Control parent = this;
for (int groupIndex = 0; groupIndex < 100; groupIndex++)
{
GroupBox grp = new GroupBox();
Panel pnl = new Panel();
pnl.Dock = DockStyle.Fill;
pnl.Parent = grp;
grp.Parent = parent;
grp.Size = new Size(parent.Width - 10, parent.Height - 10);
parent = pnl;
}
When groupIndex reaches to 24, it encounters the Error creating window handle exception. What's the reason for and how to overcome it?
Thanks
This a duplicate of the following question:
Control Nesting Limits in WinForms
To answer your question, Windows has a limit of 50 nested controls (source).
Your sample creates a group box and nests a panel inside of it, and you do this 24 times before the crash occurs. If you account for the form itself, you are hitting that limit.
The limit is enforced when the controls are drawn. From my testing, I was able to create and nest many hundreds of controls, but when I added the top level control of that nest to a visible control, it still crashed.
I have a c# windows form application that has a similar GUI functionality as MSN. It works in the way such that only a notification window appears if there is notification which in this case I have put several buttons and other stuffs in a single panel. (is this the right way to do so?)
How do I code it such that I can use a arrayList to add similar panels to the list and use a for loop to call it out. Example would be calling 2 or 3 similar panels through the use of arraylist(?) and for them to appear below one another. (Maybe like how MSN notifications window comes up one above another.)
the code for the panel is
this.panel1.Controls.Add(this.button1);
this.panel1.Controls.Add(this.lblImage);
this.panel1.Controls.Add(this.lblName);
this.panel1.Controls.Add(this.lblLinkName);
this.panel1.Controls.Add(this.lblLinkLocation);
this.panel1.Controls.Add(this.lblLocation);
this.panel1.Location = new System.Drawing.Point(13, 134);
this.panel1.Name = "panel1";
this.panel1.Size = new System.Drawing.Size(506, 100);
this.panel1.TabIndex = 17;
do I have to code the for loop in the designer file or the coding file? as after I have tried to add for loop in the designer code file, the designer view sort of unable to display my UI.
I'm guessing this is what you're looking for
for(int i = 0; i < panels.length; i++){
AddPanel(panels[i], i);
}
AddPanel(System.Drawing.Point point, int tabIndex){
Panel panel = new Panel();
this.Add(panel);
panel.Controls.Add(new Button());
panel.Controls.Add(new Label("Image"));
panel.Controls.Add(new Label("Name"));
panel.Controls.Add(new Label("linkName"));
panel.Controls.Add(new Label("linkLocation"));
panel.Controls.Add(new Label("location"));
panel.Location = point;
panel.Name = "panel" + i.ToString();
panel.Size = new System.Drawing.Size(506, 100);
panel.TabIndex = tabIndex;
}
You'll need to populate the panels array with a the points you'd like your panels to be added at.
I would create a Custom Control that has the interface you want for each item. Have the Control expose properties, methods, and events that allow you to access the child controls in a constant manner.
You can create multiple instances of the custom control and add them to a List and attach event handlers to them, etc...
If you use a flow layout panel as the parent and add each instance of the custom control to it, it will automatically handle the layout for you without you having to manually position them. If the flow layout is inside a container with autoscroll set, you will have a nice scrolling list of whatever kind of Items you can dream up.
adding example
With a custom control called ListItem.
ListItem item = new ListItem();
someFlowPanel.controls.add(item);
You should probably set item's width to the width of the flow panel you add it to, and set it to anchor left and right.
I get this response from a web service call. Something like this
<Response>
<Control1 type = "DropdownList" value= "USA,UK,Sweden,UAE"/>
<Control2 type = "Textbox" value= "Contries"/>
<Control3 type = "Button" value= "None">
</Response>
Based on this I de-serialize it into List<Controls>.
Now I need to be able to dynamically create a winform based on these controls. My problem is the layout. I want to be able to create them nicely separated (If possible vertically aligned) in batches of lets say 5.So If I need 15 controls I have 3 columns and 5 rows.
What would be best way to achieve this? I know that I can use the inbuilt positioning properties like top, width etc., but maybe someone out there has done something similar in a better way.
I think you should use TableLayoutPanel. Also you can read best practices to use this control.
One benefit of using TableLayoutPanel from above article:
Layouts that will be modified or generated dynamically at run time, such as data entry forms that have user-customizable fields added or subtracted based on preferences.
So basically I am gonna do something like this(might be useful for someone else)
Form op = new Form();
FlowLayoutPanel panel = new FlowLayoutPanel();
op.Controls.Add(panel);
for (int i = 0; i < 10; i++)
{
Button b = new Button();
b.Text = "Button" + i.ToString();
panel.Controls.Add(b);
}