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how to fit a long text into a UITextView or UILabel

i'm developing an ios app with xamarin.
i need to fit a long text into a content (UILabel or UITextView).
this is the code i used:
var descStrLabel = new UITextView(new CGRect(0, 250, w, 550));
descStrLabel.BackgroundColor = UIColor.Black;
descStrLabel.Font = UIFont.SystemFontOfSize(10.0f);
descStrLabel.TextAlignment = UITextAlignment.Center;
descStrLabel.TextColor = UIColor.LightGray;
descStrLabel.Text = #"HERE THE LONG TEXT...";
//descStrLabel.Lines = 0;
descStrLabel.AutoresizingMask = UIViewAutoresizing.FlexibleWidth;
View.Add(unified);
View.Add(subtitle);
View.Add(descStrLabel);
When i debug the application, the last part of the text is missing...
maybe i need to set the width at runtime...
thanks in advance for your help

I don't really know how you want to "fit" the text. If you want to show the text all in one line, try calling SizeToFit():
desc.SizeToFit();
documentation for SizeToFit():
Moves and resizes the UIView so that it tightly encloses its UIView.Subviews
If you want the UITextView to wrap lines, then you don't need to do anything! Line wrapping is enabled by default. If it doesn't for you, try setting LineBreakMode:
desc.TextContainer.LineBreakMode = UILineBreakMode.WordWrap;
documentation for WordWrap:
Wraps at the first word that does not fit.

Barcode i25 using ItextSharp

i am using BarcodeInter25 class to make barcode. I am able to make it but its just blur how can it become more sharp ??
also its background white colour is not completely white
My Code:
BarcodeInter25 code25 = new BarcodeInter25();
Rectangle r = new iTextSharp.text.Rectangle(38, 152);
code25.ChecksumText = false;
code25.Code = "some digits";
code25.BarHeight = 2
System.Drawing.Image i = code25.CreateDrawingImage(System.Drawing.Color.Black, System.Drawing.Color.White);
MemoryStream ms = new MemoryStream();
i.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
Image img = Image.GetInstance(ms.ToArray());
ms.Dispose();

Looking at your code, it should be obvious why the barcode is blurry. You convert it to a System.Drawing.Image (making it a raster image) and then you convert it to an iTextSharp.text.Image (but by then the image is already blurry).
The correct way to achieve what you want, is to create an iTextSharp.text.Image straight from the barcode (do not pass through System.Drawing.Image). This can be done like this:
BarcodeInter25 code25 = new BarcodeInter25();
Rectangle r = new iTextSharp.text.Rectangle(38, 152);
code25.ChecksumText = false;
code25.Code = "some digits";
code25.BarHeight = 2;
PdfContentByte cb = writer.DirectContent;
Image img = code25.CreateImageWithBarcode(cb, null, null);
Now the Image object won't be a raster image (with pixels that make the lines blurry), but it will be a true vector image (no pixels, but instructions such as moveTo(), lineTo() and stroke()). Vector data has the advantage that it is resolution independent: you can zoom in and zoom out as much as you want, it will always be sharp.
This is explained in Chapter 10 of my book where you'll find the Barcodes example. In that chapter, you'll also discover the setFont() (or in iTextSharp the Font property). I quote from the API documentation:
public void setFont(BaseFont font)
Sets the text font.
Parameters:
font - the text font. Set to null to suppress any text
So if you don't want to see any text, you can add the following line to the above code snippet:
code25.Font = null;

You should avoid re-sizing by any means. The output is most likely pixel-perfect but when you scale it up/down a bilinear filter will smooth it rendering it blurry.
I had the same exact problem by embedding a QRC code in a PDF and solved it by avoiding a resize.
If you really need a different size apply it programmatically in code by using the correct interpolation algorithm.

charting markers not appearing on line

So I'm using Windows Forms Chart to generate graphs containing several lines that can create some clutter on the graph and need something to differentiate them other than color. There are too many points to using dotted or dashed lines as there is no observable difference between that and a continuous line. So what I'm hoping to do is to get markers with various shapes to show up on the lines like in Excel, for instance. Right now I'm have it coded like this
myChart.Series["MySeries"].ChartType = SeriesChartType.FastLine;
myChart.Series["MySeries"].MarkerStyle = MarkerStyle.Diamond;
What this does is put a diamond in the legend over that line, but it doesn't put diamonds on the actual line that is in the chart itself. Changing the marker size doesn't make a difference, unfortunately, and neither does changing the marker color. Is there a way to get that to happen. Thanks for reading, and any help you have.
EDIT:
Heres the relevant code.
Its data is held in a class that is the value-peice of a dictionary.
The class contains a list of doubles.
public void Charter(Color colorOfLine)
{
double xValue;
double yValue;
myChart.Series.Add("MySeries");
myChart.Series["MySeries"].ChartType.FastLine;
myChart.Series["MySeries"].ChartArea = "ChartArea1";
myChart.Series["MySeries"].Color = colorOfLine;
myChart.Series["MySeries"].MarkerStyle = MarkerStyle.Diamond;
myChart.Series["MySeries"].MarkerColor = Color.Black;
myChart.Series["MySeries"].MarkerSize = 5;
myChart.Series["MySeries"].MarkerBoarderColor = Color.DeepPink;
foreach (KeyValuePair<int, MyClass> Pair in MyDictionary)
{
xValue = Pair.Value.MyClassList[0];
yValue = Pair.Value.MyClassList[1];
myChart.Series["MySeries"].Points.AddXY(xValue, yValue);
}
}
I should add that I've played around with the MarkerStep, and MarkerBoarderWidth as well, all to no benefit. The issue seems to be that the marker simply isn't appearing on the actual lines in the chart itself. Also I'm using Visual Studio 2010 Express for what its worth. Thanks again for reading.

Use Line. Don't use FastLine. FastLine won't generate markers for you.
myChart.Series["MySeries"].ChartType = SeriesChartType.Line

Set the MarkerSize to something bigger:
myChart.Series["MySeries"].MarkerSize = 4;
ETA:
You may also need to set the color of the marker:
myChart.Series["MySeries"].MarkerColor = Color.Blue;
myChart.Series["MySeries"].Color = Color.Blue;

How to get the HEIGHT of the Run or Paragraph

I found the Run or Paragraph in FlowDocument and now I need to know the HEIGHT of it.
i.e.
while (navigator.CompareTo(flowDocViewer.Document.ContentEnd) < 0)
{
TextPointerContext context = navigator.GetPointerContext(LogicalDirection.Backward);
Run run = navigator.Parent as Run;
// I need to get HEIGHT of Run in pixels somehow
Is it possible to do in fact?
Thank you!

A little function i am using. The input is a string containing a Section. You can easily render other blockelements like Paragraph.
You also can omit the second parameter of the Parse method.
The trick is not to measure the Paragraph, but the ViewBox which contains a RichTextBox. This is needed to actually render the Flowdocument. The ViewBox dynamically gets the size of the rtb. Maybe you even can do this without the ViewBox. I spent some time to figure this out and it works for me.
Note that Width of the RichTextBox is set to double.MaxValue. This means when you want to measure a single paragraph it has to be very long or everything is in one line. So this only makes sense when you know the Width of your output device. As this is a FlowDocument there is no Width, it flows ;)
I use this to paginate a FlowDocument where i know the paper size.
The returned Height is device independent units.
private double GetHeaderFooterHeight(string headerFooter)
{
var section = (Section)XamlReader.Parse(headerFooter, _pd.ParserContext);
var flowDoc = new FlowDocument();
flowDoc.Blocks.Add(section);
var richtextbox = new RichTextBox { Width = double.MaxValue, Document = flowDoc };
var viewbox = new Viewbox { Child = richtextbox };
viewbox.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
viewbox.Arrange(new Rect(viewbox.DesiredSize));
var size = new Size() { Height = viewbox.ActualHeight, Width = viewbox.ActualWidth };
return size.Height;
}

Label with an Image on the left - preventing the text to come over the picture?

I want to report status of an operation in a WinForm application written in C#.
To make it more user-friendly, I want to show an icon on the left depending on the status.
Animated GIF during the process
Ok or Error icon depending on the result.
I wanted to use the native WinForms Label control which works well with animated GIFs and looks as standard as it can get.
My problem however is that text comes is written over the picture.
There does not seem to be any property to set a margin for the text.
I tried the most obvious thing, which is to prefix it with spaces, which works, except when the text wraps to the next line, as shown below.
I would prefer not spend too much time writing/testing/debugging derived control for this if possible...
I could put a quick and dirty user-control, with a picturebox on the left of a label, but it doesn't feel very clean.
Is there any trick to get around this quickly and elegantly, or can someone point me to a Label derived class supporting this that is relatively lightweight? (I had a look at CodeProject but couldn't find much).
Thank you.

A simple alternative is to use a Button instead of a Label, as shown below:
By using the following properties, you can style the Button to look just like a Label, whilst also having the option to keep the image and text aligned next to eachother:
FlatAppearance ↴
BorderSize = 0
MouseDownBackColor = Control
MouseOverBackColor = Control
FlatStyle = Flat
Image = [Your image]
ImageAlign = MiddleLeft
Text = [Your text]
TextAlign = MiddleLeft
TextImageRelation = ImageBeforeText
A simple way to achieve the desired effect; no user controls!

The quick-and-dirty usercontrol with an image and a separate label is your best option. Just add a public string property to set the label's text and you're pretty much done.

Here's a different solution that I find less hacky than the "styled button" approach. It also allows you to set the distance (spacing) between the image and the text.
class ImageLabel : Label
{
public ImageLabel()
{
ImageAlign = ContentAlignment.MiddleLeft;
}
private Image _image;
public new Image Image
{
get { return _image; }
set
{
const int spacing = 4;
if (_image != null)
Padding = new Padding(Padding.Left - spacing - _image.Width, Padding.Top, Padding.Right, Padding.Bottom);
if (value != null)
Padding = new Padding(Padding.Left + spacing + value.Width, Padding.Top, Padding.Right, Padding.Bottom);
_image = value;
}
}
protected override void OnPaint(PaintEventArgs e)
{
if (Image != null)
{
Rectangle r = CalcImageRenderBounds(Image, ClientRectangle, ImageAlign);
e.Graphics.DrawImage(Image, r);
}
base.OnPaint(e); // Paint text
}
}

One alternative to a UserControl would be to use a TableLayoutPanel with two columns and one row, placing the image control in one cell and the text control in the other.

Its an old question, but maybe someone will look here just like I got here...
You can use the Align on the Image and on the text:
label.TextAlign = ContentAlignment.MiddleRight;
label.ImageAlign = ContentAlignment.MiddleLeft;

nameoftextlabel.hidden=1
That should work.