Develop Reference

does any one know how to add a tooltip in the code behind of uwp?

hi I'm trying to add a text window that opens when I hover over a image in Uwp
I'm not meant to use xaml and I'm having troubles I pretty much want it to do this:
ToolTip tp = new ToolTip(); tp.Content = this.ToString(); ToolTipService.SetPlacementTarget(tp,Img);
but i cant get it to be added to the image any help would be appreciated.
does any one know what to do?

Call SetToolTip() with the image as the first parameter.
ToolTipService.SetToolTip(image, "this is my tip");

Create a hyperlink from a text file in C#

I have a C# project (Win Forms), where a form reads an external text file, and then puts the text in a textbox on the form. What I would like to do is create a hyperlink from the text that the program reads in.
For example, if the text file reads "To go to Google, click HERE [www.google.com]", then I want the program to make "HERE" clickable, and go to www.google.com if HERE is clicked on.
Right now the program can read in the text file and recognize the web address just fine. I just don't know how to make "HERE" clickable.
Note: Due to external factors, I cannot make a button, or LinkLabel, or other object for the user to click on. The word itself has to be the hyperlink (if that is at all possible). Also, I have to read the string from an external file. I can't simply put textBox1.Text = "To go to Google, click HERE [www.google.com]";
Thanks in advance!

The easiest work-around for what you are looking for would be to add a handler for DoubleClick, and then just compare the selected text.
If it must be a single click, you want to use OnClick, and then get the test up to the last space to the left and to the right, and do the same compare.
VERY HACKISH btw.
private void textBox1_DoubleClick(object sender, EventArgs e)
{
if (string.Compare(textBox1.SelectedText.Trim(), "HERE") == 0)
System.Diagnostics.Process.Start("http://www.google.com");
}

Building on the previous response, you might want to add an eventhandler to a label instead. You should be able to format the label to be blue and underlined to look like a link, also.

Add button to copy text in MessageBox

I have a program that contains a list of names, and a button that displays a random name in a MessageBox. Is there any way I can add a button "Copy" next to the OK to the MessageBox, that when clicked copies the name and then closes?
If the above isn't possible, is there a way to enable copying the text in a MessageBox?
Thank you.
edit: My users won't understand Ctrl+C, Highlight and Right Click > Copy is what I'm looking for (if a Copy button isn't possible)

If a user presses Ctrl-C while the MessageBox has focus, the message, the MessageBox caption and the MessageBoxButtons labels are copied to the clipboard.
I googled your title and found this..
Or if you really need a button that says copy you can create your own MessageBox with a new windows form and then do what you want with the buttons. Open it like this to keep the MessageBox feel :
var myMessageBox = new CustomMessageBox();
myMessageBox.ShowDialog();

It sounds like maybe you are looking for the Clipboard class.
Clipboard.SetText(variableWithValue);
There is also another answer here about manipulating the contents of a Message Box.
It also might be easier to simply make a modal dialog that emulates a MessageBox without actually using the MessageBox class.

Push Button (On/Off) in C# Windows Forms

On the Windows Form application I have a Lamp image (a black and white one, and a bright one. For OFF and ON respectively).
Using the Button how can I achieve the scenario such that same button will turn the property of the image (pictureBox in my case) to show the Lamp as ON and pressing the same button again will turn the Lamp off.
I am accessing the 'Visible' property of picture box.

Put two images on top of each other and get the button to switch which one of them is enabled.
In the form designer you make one of them visible and the other non-visible. The code in the button handler can then be something like:
lightImage.Visible = !lightImage.Visible;
darkImage.Visible = != lightImage.Visible;
That will swap which one is visible and eliminate the need to keep state elsewhere.

A bit late to the party, but you can use a checkbox and set the appearance to button.
I think that would do what is expected by the original post.

I'm not sure about the way to put 2 images over each other, but if you want to reach the same effect:
place the 2 image files in your project resources
in the click event of the button, toggle the button image depending on a setting:
this would be in the click event:
Properties.Settings.Default.IsOptimizedForTracer !=Properties.Settings.Default.IsOptimizedForTracer;
if (!Properties.Settings.Default.IsOptimizedForTracer)
{
btnOptimizeForTracer.Image = Properties.Resources.TracerOFF;
return;
}
btnOptimizeForTracer.Image = Properties.Resources.TracerON;

How to change the background color of button in windows phone application?

I am developing window phone 7 application in C# & silverlight 4. I am new to the silverlight.I have two buttons in my application for different purposes. I want to change the color of the button dynamically when the button gets clicked. So I am using the following code
IncomeButton.Background = new SolidColorBrush(Colors.Red);
But it is not working. Can you please provide me any code or link through which I can resolve the above issue ? If I am doing anything wrong then please guide me.

Changing the styling of a button from it's own click event comes with a catch. Peter elaborates here.
Why can't I change the Background of my Button on a Click event? - Peter Torr's Blog

You can simply execute IncomeButton.UpdateLayout() after changing button's color.

I also ran into that "simple" problem. Instead of using Peter's "button styling change" thing, I simply placed a rectangle below the button and changed it's color with the Rectangle.Fill property in the Click event of the button. Works fine for me.