just say I have a string as follows:
This is a long long lojngoi sudofi usdfh ksjdhfjk sdhfgkj shgh sdfhg sdfg sdfgdsfg ... I want to specify a maximum width (eg 180) for my string and get the height returned... the picture below explains in more detail:
I'm developing a Point Of Sale (POS) app in VB.NET and .NET Framework 3.5 where multiple items can bought at a time. I need to print all items: their code, name quantity, price in a row-column manner.
SHOP NAME date
========== =====
SL CODE NAME QTY PRICE
== ===== ===== === =====
[code]....
The width of page is fixed but the height will be dynamic.The printout will be printed on rolled paper normally used in a POS system.How can this be done?
I have files that are one long line of text but are made up of individual segments. I have managed to parse the segments into a string array but now need to parse each segment into its individual fields, based upon a field structure defined by the first 2 characters of the segment.For example:
CA12345ABC999999XXPPPPPPPP55
CA segment (CA is first 2 characters of segment) has fields defined as:
Field Name,Start,Length
[code]....
I am trying to format a string of arbitrary length into a fixed width field for display.
Let's use a width of 20 as an example, and call the string to be formatted s. I'm adding the formatted string to a StringBuilder named b.
Dim b As New System.Text.StringBuilder()
Dim s as New String
If the string I want to display is shorter than 20 characters, I can do this:
b.Append(s.PadRight(20))
or
b.AppendFormat("{0,-20}", s)
So far, so good. But, if the string is longer than 20 characters, I want the string to be truncated to 20 characters as it is appended. The code above appends the entire string.
I tried this:
b.Append(s.Substring(0,20).PadRight(20))
But, this fires an exception if the string was shorter than 20 characters.
So, I ended up with:
b.Append(s.PadRight(20).Substring(0,20))
This seems to do the job. The PadRight prevents the exception by making sure thet string has 20 characters before the Substring is performed.
I was wondering if there is an alternate method that would look more elegant and avoid padding the string just so prevent the substring from causing an exception. Have I missed a feature of String.Format that can accomplish this in one step?
Edited to add solution:
I ended up with the following code:
Module Extensions
<Extension()> _
Function AppendFixed(ByVal b As StringBuilder, ByVal s As String, ByVal width As Integer) As StringBuilder
[Code]....
This uses an extension method to clean up the syntax, as suggested by Joel and Merlyn, and uses the StringBulider Append overloads to avoid creating new strings that will have to be garbage collected, as suggested by supercat.
I am working on a report in Excel and there's potential for quite large amounts of text easily over-running a merged sell of maximum row height size. I therefore want to be able to merge the right amount of rows to make the text fit cleanly.My idea was to try and find the height of a string when limiting it's width - essentially placing a piece of text into some kind of container, making that container fit to size (with a set width limit, in this case 640 pixels), and measuring the height of that container. With the height of the said container, I could then work out the amount of standard sized excel rows I want to merge.I tried to use a label but there's no way to set only the vertical element to be autosize.
View 3 Replieshow can i calculate the width of a circle at top + 1/3 height & top + 2/3 height?
View 5 RepliesIs there anyway I can do a a custom screen shot? like the height and width of it? This is what I want to do
Left = 18
top = 556
right = 914
bottom = 289
So a regular screenshot on my pc is 1152 by 864. So how would I say do a 300 by 400 screenshot?
I have a mpeg videoHow to detect the width and height?
View 2 RepliesI am writing some text in a control using Graphics.DrawString I need to measure the width of the drawn text in pixel.
I tried to mesure it using:
Graphics.MesureString
TextRenderer.MesureText
GetTextExtentPoint32A (API)
All these method of mesuring the string returns different values for the width, and they are all the wrong value They all mesure the narrow caracteres as "i" as being narrower then they realy are and the wide caractere as "W" as wider than they realy are What would the proper way to draw and/or mesure a string to get the right position on the screen where the text ends
How can i set a fixed height detail section in crystal reports regardless of record count.I set the height of detail section to 10 records. If i put 8 records, the space for other 2 records should be white space. That is, total height remain the same.
View 8 RepliesIm trying to resize a picturebox dynamically using .size.height and .size.width Its not working. This is the error message: "Expression is a value and therefore cannot be the target of an assignment." Never used height and width before. Been trying to find the answer, but it seems beyond me. Im sure its easy. Anyone know whats wrong with this?
[Code]...
I am aware that this is a visual basic dot net post. However It was extremely simple for me to write out a file in VB6 using lines such as the following snippet
[Code]...
I want basically to export an array A (I used zero based array here) with three columns and a particular value B in fixed widths, hence the @@@@@ which means 5 spaces in to a text file defined by the FreeFNum (FreeFileNumber).
I would like to use CSV and all the other formats but some scientific programs written in FORTRAN may not support them. Anyway my file output here needs to be in this fixed width format because it will be used by proprietary software that I have no access to the source code.
[Code]...
I'm using vb6 to read lines of txt files, using the code posted in ream.In.Code "Reading a Text file Line by Line". My question is how can I real a line with fixed column width, for example:
qwerty 12345 asdfg
asd 455 hfgdf
qhjkrty 1235 asdfg
The objective is to read each part of the row. In Visual Studio 2010 Beta version the code I present below that is actually working but it doesn't work in VB6.
Using Reader As New Microsoft.VisualBasic.FileIO.TextFieldParser("C:\teste.txt")Reader.TextFieldType = Microsoft.VisualBasic.FileIO.FieldType.FixedWidthReader.SetFieldWidths(8, 30, 25, 45, 57)
[code].....
I found away to read a fixed position text file, but I encounter a problem, I know which field I want to go and check, how can I jump directly to the field I need. Readfields does not helps.for instance I need to check on field 3 and 7 of the row before the next row is read.[code]is this my best approach to read a fixed position text file?
View 1 RepliesI am developing an application in VB.NET 2008, in which I try to get Desktop Icons Text Width & Text Height.So far I have obtained all desktop icons positions, but I really can't figure by myself how to get Desktop Icons Text Width & Text Height.
[Code]...
I am developing an application in VB.NET 2008, in which I try to get Desktop Icons Text Width & Text Height. So far I have obtained all desktop icons positions, but I really can't figure by myself how to get Desktop Icons Text Width & Text Height. Here is the VB.NET 2008 code that I use:
[Code]...
I am developing an application in VB.NET 2008, in which I try to get Desktop Icons Text Width & Text Height.So far I have obtained all desktop icons positions, but I really can't figure by myself how to get Desktop Icons Text Width & Text Height
Imports System.Runtime.InteropServices
Module mdlDesktopIcons
Private Const STANDARD_RIGHTS_REQUIRED As Integer = &HF0000
[code].....
I want to set header column width for grid view. I tried HeaderStyle-Width="30px". But it is depending on Item columns. The column width is setting based on item value. But I want fixed width even if it has value or empty.
View 2 RepliesI need to write some fixed-width font (i.e Courier New or Consolas) text to a .net Winforms window in the Paint event - not using a label or any other winforms control - rather using a graphics object method to render the text onto the form's client area. I am having difficulty aligning text on different lines under headings even though it is fixed width font. How can I get a precise measurement of the width of a single character in the fixed-width font? How can I get 2 lines to print out aligned horizontally in successive text out calls?
For example:
Heading 1 Heading 2
Short Other text
A bit longer Still aligned?
I need a separate call to render each cell of text under Heading 2. For argument's sake - let's say column 1 items are printed in black and column 2 are printed in blue - we can't use the same text out call for the entire line.
Is there a simple way (without measuring characters using a Graphics object) to check if a font is fixed-width?
View 7 RepliesThis is a sample of code I'm working with. I don't work with VB6 that much and was wondering if someone could tell me what the .Height refers to:
[code]...
I understand the Screen.Height, but when .Height is subtracted from it, what does .Height represent. Is it also the Screen's Height?
I have a form which is a mdiParent, on this form I also have a left docking form which obviously reduces the size of the avaliable mdi area. Is there a way that I can get the width and height of the mdi area that is avaliable? I am programming in VB.Net.
View 2 RepliesIn html I just do <img src="x.jpg" width="1px" height="2px"> how about in vb.net. Is there an easy way to do this. When you are viewing the image through the picture box
View 1 Repliesi have a RichTextBox in my application and there may be many and many lines, i dont want to use any Scrollbar in RichTextBox. i want RTB to change its height and width itself according to the lines in RTB.
View 2 RepliesShow 'me.width x me.height'?
View 2 RepliesHow to delete a record or field from a fixed-width file in visual basic code?
View 1 RepliesIn Excel under Data Tab-Text to Columns-Fixed Width- and when next is pressed we get preview of Selected Data.
There a Scale is being designed(10, 20, ...). Is there any way in VB.net to do that scale or any other form of Implementation.
How do I trim a text if text's width is bigger than a specific unit of measure (for example 3 centimeter).
View 14 RepliesI have the darndest problem. One of my forms resizes itself. In the development environment the size is 605/301. When the program runs it is much larger. In the form_load event I put the me.Width & me.Height commands and it still is much larger. I looked at the "hidden" windows forms code and can't see any resizing going on. I added a msgbox with the width & height. It says 605 & 301, yet the form is much larger.
View 18 RepliesWhat I am trying to do is rotate a string (or rectangle) 45degrees and find the new height and width after the string has been rotated.
Basically the width and height of the rectangle draw area the new 45degree string takes.