I create a user control and add a textbox to it. In my windows form I add the user control i created and add a textbox and a button. How to copy the text I input from the textbox of Form to textbox of Usercontrol and vice versa. Something like
usercontrol.textBox1.text = textBox1.text
You could add to your User Control code a public property that delegates into the TextBox's Text property:
public string MyTxtBoxValue { get { return this.txtBox.Text; } }
And you could also have a setter to that, of course, if needed.
What you don't want to do, however, is exposing the whole TextBox by making it public. That is flawed.
From Form to Usercontrol
Form Code
public string ID
{
get { return textBox1.Text; }
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
userControl11.ID = ID;
}
Usercontrol Code
public string ID
{
set { textBox1.Text = value; }
}
There are multiple ways to access your user control text box data. One way to accomplish this would be to expose the text box on the user control at a scope that can be accessed via the form it's loaded on. Another way would be raising an event on the button click of the user control and subscribing to it on the parent form.
Although some stuff are inherited when creating a custom user control, for the most part you have to define your own properties. (like text value, etc..)
I would take a look at this:
http://msdn.microsoft.com/en-us/library/6hws6h2t.aspx
good luck!
Related
I am making an app in which there are multiple UserControls stacked onto each other. So the elements go like this: MainForm -> User clicks on a UserControl1 on the MainForm which (UserControl1) has a panel on which there is displayed another UserControl2 with a button. When the user clicks on it, it displays another UserControl3 which is then displayed in the panel beneath the button, where finally the user enters some text in the textbox. I need the data from the textbox in the MainForm so I have MainForm and UserControls connected via EventHandlers and pass my ResponseModel in which there is some dat a that I need to pass to MainForm. The first time this works, an item is created and displayed, after the item there is this "button" (User controls) displayed, in case the user wants to create another one. But then comes the problem when the user types in a different text for a new item, it creates an item with the same text!! Like the textbox was never changed (I have a debugging point set on the constructor to see every time that the textbox is empty). Below is some code and an image, for you to see how this should work. Also when I first delete the item it then doesn't work to create a new item for some reason.
This is how I send the data from the last UserControl:
if (tbx_list_name.Text == "")
MessageBox.Show("You can't create new list without a name!", "Can't create new list!", MessageBoxButtons.OK, MessageBoxIcon.Warning);
else
CreateListTextBoxHandler?.Invoke(this, new ListCreationResponseModel() {
Code = id, ListName = tbx_list_name.Text
});
This is how I create the last UserControl which has the textbox:
control.CreateListTextBoxHandler += GetHandlerData;
panel.Controls.Add(control);
And this is how I get the data one stage down (this practice continues through couple more stages back to MainForm):
public void GetHandlerData(object sender, ListCreationResponseModel e)
{
try
{
panel.Controls.Clear();
CreateListButtonHandler?.Invoke(this, e);
}
catch (Exception ex)
{
_ = new ErrorHandler(ex);
}
}
You seem to have a recursion here. GetHandlerData is added to the CreateListTextBoxHandler event (or delegate) and invokes CreateListTextBoxHandler again, which will call GetHandlerData again...?? But tbx_list_name.Text is passed to the model only once at the top level down to all the other calls.
You can fix this by passing a reference to the textbox instead of the text itself. Then you will always be able to retrieve the current text of the textbox.
public class ListCreationResponseModel
{
private readonly TextBox _listNameTextBox;
public ListCreationResponseModel(TextBox listNameTextBox)
{
_listNameTextBox = listNameTextBox;
}
public int Code { get; set; }
public string ListName => _listNameTextBox .Text;
}
Now, when you retrieve the ListName you don't get a stored value but the actual text of the textbox.
You can create the handler like this:
CreateListTextBoxHandler?.Invoke(this, new ListCreationResponseModel(tbx_list_name) {
Code = id
});
in my application i want to implement an options dialog like you have in VisualStudios if you go to Tools->Options in the menubar. How can i do this? My first idea was to use pages and navigation but maybe there's an easier approach?
It's probably not the easiest way but I wrote this snippet that match your goal and it's a good exercise.
In an empty Windows Forms project add a ListBox (listBox1) and a Panel (panel1). Then create 2 UserControls (UserControl1 and UserControl2), these will be the content that is shown when you click the list.
In your Form1 class we create a ListItem class that will contain your menu options as such:
public partial class Form1 : Form
{
public class ListItem
{
public string Text { get; set; }
public UserControl Value { get; set; }
public ListItem(string text, UserControl value)
{
Text = text;
Value = value;
}
};
...
}
After that you add items to the ListBox right after InitializeComponent() in Form1:
public Form1()
{
InitializeComponent();
listBox1.DisplayMember = "Text";
listBox1.ValueMember = "Value";
listBox1.Items.Add(new ListItem("Item1", new UserControl1()));
listBox1.Items.Add(new ListItem("Item2", new UserControl2()));
}
This will make it so when you use listBox1.SelectedItem it will return an object that you can cast to a ListItem and access the associated UserControl.
To make use of this behaviour, go to designmode and double-click the ListBox, this'll add code for the SelectedIndexChanged event. We use this event to display the UserControl in the Panel panel1. This will clear any old Panel content and add a selected UserControl:
private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
{
panel1.Controls.Clear();
UserControl control = (listBox1.SelectedItem as ListItem).Value;
if(control != null)
{
panel1.Controls.Add(control);
control.Dock = DockStyle.Fill;
}
}
I suggest you try adding a button or something to differentiate the UserControls and play around. Have fun! :)
You should create a new Window and show that as opposed to create a page and navigate to it. Then you would call .show() on the new window for it to show.
Then you would change the look of the new window to however you want, the same as editing pages.
If you build your options into a full object model that matches the structure of the options window, then the best way is to use whatever navigation-aware UI binding that your MVVM toolkit uses. The options window would start off as a new root level window to which you would bind the root of your options data model.
So, in short think of the options dialog as a mini-application that uses the same structure as your main MVVM application, but with a different data model root.
If you plan to allow the user to cancel the changes to the options, then you would want your options data model to be clonable so that you can populate the options window with the clone and then swap out the real options with the new data if the user presses OK on the options window. If they select cancel you can just throw the cloned object away and destroy the window.
I haven't done this for a while so am not quite sure how to do what I need, but I am sure it is pretty simple.
Basically, I have a form with a navigation pane. I want to make it so when a user clicks a button on that pane, say 'Home' it changes the content on the form, but doesn't actually switch to another form, if you get me?
As in, I would like the navigation pane to stay as it is the entire time and I only want the content of the form to change. It is almost like the 'TabControl' tool in Visual Studio's 'Toolbox' although instead of the tabs being directly above the content, I want them to be buttons displayed in a side pane. See the image below for a better understanding. Thanks!
(Side pane, and header stays the same regardless on what button is pressed, but the content changes.)
I'd implement this using UserControls. One UserControl is shown when a button is clicked. I'd create an interface (for example IView) that would be implemented by each UserControl that declares common functionality, like for example a method to check whether you can switch from one to another (like a form's OnClosing event) like this:
public interface IView
{
bool CanClose();
}
public UserControl View1: IView
{
public bool CanClose()
{
...
}
}
public UserControl View2: IView
{
public bool CanClose()
{
...
}
}
Then, switching views is quite easy:
private bool CanCurrentViewClose()
{
if (groupBox1.Controls.Count == 0)
return true;
IView v = groupBox1.Controls[0] as IView;
return v.CanClose();
}
private void SwitchView(IView newView)
{
if (groupBox1.Controls.Count > 0)
{
UserControl oldView = groupBox1.Controls[0] as UserControl;
groupBox1.Controls.Remove(oldView);
oldView.Dispose();
}
groupBox1.Controls.Add(newView);
newView.Dock = Dock.Fill;
}
In a button you could do this:
private void btnHome_Click(object sender, EventArgs e)
{
if (CanCurrentViewClose())
{
ViewHome v = new ViewHome();
// Further initialization of v here
SwitchView(v);
}
else
{
MessageBox.Show("Current View can not close!");
}
}
I've successfully used this approach on many occasions.
Simplest way is to place multiple Panels as content holders, implement content manager which keeps references to Panels and with it show/hide desired panel.
Simple, but for smaller apps it will work
You can simply use a TabControl which has as many TabPages as you want. For the TabControl you can set the Alignment property to Left
I have a question I hope some of you might be able to answer, I haven't found any ways to do this on google or here.
What I want:
- A custom control that functions just like an input box. (But it has to be a winform control that can be added to a form. Not a form.)
- It has to be able to grab the value from its text box and send it to the parent in the function it was called in.
Here is how I want to call it:
string str = MyBox.GetString("control title");
Can anyone help?
I don't know if this is event possible in c#. I couldn't figure it out, but if anyone can please answer!
You want something like this
public partial class MyBox : Form
{
public MyBox()
{
InitializeComponent();
}
public string ResultText { get; set; }
public static string GetString(string title)
{
var box = new MyBox {Text = title};
if (box.ShowDialog() == DialogResult.OK)
{
return box.ResultText;
}
return string.Empty;
}
private void okButton_Click(object sender, EventArgs e)
{
this.ResultText = txtUserInput.Text;
this.DialogResult = DialogResult.OK;
}
}
where MyBox would be a Form with TextBox - txtUserInput and an okay button linked to the okButton_Click event.
And you can make calls from other forms like this:
string userInput = MyBox.GetString("Title for MyBox");
If you want the box to reside on a form, you can just use a regular TextBox to get the inupt. Maybe eclose it in a GroupBox to give a "title", add a description label.
Lastly, and most importantly, add an "Update" Button to the GroupBox. Inside this button's Click handler, you can retrieve the value of the textbox with string str = textbox.Text.
i'm using a main form and edit form, and i want to use the edit form text boxes in the main form, how can i do it?
edit
can't use user controls.
The easiest way would be create properties that expose the text fields. Call your edit form, then read the properties back.
public class MainForm
{
private void OnEditClick()
{
EditForm editForm = new EditForm();
DialogResult result = editForm.ShowDialog(this);
//check the result for ok/cancel etc if your using them.
whatever = editForm.TextBox1;
whatever2 = editForm.TextBox2;
}
public class EditForm
{
public string TextBox1 { get { return textBox1.Text;} }
public string TextBox2 { get { return textBox2.Text;} }
// etc
}
You could expose the whole control, but if all you care about is the contents of the text boxes, creating properties to expose just those is cleaner.
Does it have to be live? If not, add a property on the edit form and store the value (like an OpenFileDialog does when retrieving the .Filename). After it's closed, retrieve back the property and place it in the main form.
If it does need to be live, you probably need to use events (implement something close to INotifyPropertyChanged in Silverlight) then have the mainform attach to the edit form's events and update the controls as necessary (remember to check if InvokeRequired!)