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.NET Forum / Windows Forms / WinForm General / March 2008Microsoft.VisualBasic.RTrim Doesn't
Can anyone explain to me why Microsoft.VisualBasic.RTrim or Microsoft.VisualBasic.Trim do not remove the trailing blank spaces in a word such as "PI030010035127SIY "? I'm pulling data from SQL 2005 using a standard dataset/datatableadapter. I assign a variable for each field and assign the variable the field value. Then I trim it so that I can effectively line up the next word in an ongoing string (creating a string variable to use with a PrintDocument). Any suggestions? Thanks. > Can anyone explain to me why Microsoft.VisualBasic.RTrim or > Microsoft.VisualBasic.Trim do not remove the trailing blank spaces in a word [quoted text clipped - 4 lines] > Then I trim it so that I can effectively line up the next word in an ongoing > string (creating a string variable to use with a PrintDocument). Could you post a short but complete program which demonstrates the problem? See http://www.pobox.com/~skeet/csharp/complete.html for details of what I mean by that.  SignatureJon Skeet - <skeet@pobox.com> http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet World class .NET training in the UK: http://iterativetraining.co.uk Thanks for the response, Jon. As I was posting a snippet of the code, I noticed a problem with the code. Correcting did prove that the trim was working. So, let me ask a slightly different questions: I'm trying to, in essence, create a table of data (6 columns) where the text in each column starts in the same character position on the page. Below is part of the code. My problem is that even when I subtract the desired character position from the accumulated length of the preceding text, I can't get column 3 (for example) to line up. Note, the length of ODITNO never exceeds 30. .... line = line & ODITNO & Microsoft.VisualBasic.Space(50 - Microsoft.VisualBasic.Len(ODITNO)) & ItemDescription The ODITNO value is column 2 and it's length varies, so the beginning of the text for column 3 (ItemDescription) varies as well. Remember, I doing this for a PrintDocument, used in the following: document = header & line ev.Graphics.DrawString(document, printFont, Brushes.Black, leftMargin, yPos, New StringFormat()) I'm sure there just something wrong with my logic. Any suggestions? Thanks. Ross >> Can anyone explain to me why Microsoft.VisualBasic.RTrim or >> Microsoft.VisualBasic.Trim do not remove the trailing blank spaces in a word [quoted text clipped - 10 lines] > See http://www.pobox.com/~skeet/csharp/complete.html for details of > what I mean by that. > Thanks for the response, Jon. As I was posting a snippet of the code, > I noticed a problem with the code. Correcting did prove that the trim > was working. Let me guess - you were calling RTrim, but assuming it would trim the string itself rather than returning a trimmed string? > So, let me ask a slightly different questions: > [quoted text clipped - 18 lines] > > I'm sure there just something wrong with my logic. Any suggestions? I can't say I'm familiar with all of this - but is it a monospaced font? Does the position of column 3 vary in a predictable way? Does column 2 line up? SignatureJon Skeet - <skeet@pobox.com> http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet World class .NET training in the UK: http://iterativetraining.co.uk Column 2 lines up, but that's because the value in column 1 can only be either 1 or 2 characters long, so the 'if' coding is simple. Column 3's data doesn't vary predictably. It can range from 2 to 30 characters. The font is defined in the document settings as Arial 9. Thanks for your time. >> Thanks for the response, Jon. As I was posting a snippet of the code, >> I noticed a problem with the code. Correcting did prove that the trim [quoted text clipped - 31 lines] > Does the position of column 3 vary in a predictable way? Does column 2 > line up? > Column 2 lines up, but that's because the value in column 1 can only be > either 1 or 2 characters long, so the 'if' coding is simple. Column 3's > data doesn't vary predictably. It can range from 2 to 30 characters. The > font is defined in the document settings as Arial 9. Okay, that's the problem then - Arial is a proportional font. For instance, "iiiii" will take up a lot less space than "MMMMM". You'll either need to use a non-proportional font, or draw the different columns using separate DrawString calls. SignatureJon Skeet - <skeet@pobox.com> http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet World class .NET training in the UK: http://iterativetraining.co.uk Ok, I can use a different, non-proportional font. But I don't know how to concatenate the drawstring calls. So, if I understand you, I can call as many DrawString calls as I want in a single print; the trick is to format each so they don't overlap. Is that correct? Ross >> Column 2 lines up, but that's because the value in column 1 can only be >> either 1 or 2 characters long, so the 'if' coding is simple. Column 3's [quoted text clipped - 7 lines] > You'll either need to use a non-proportional font, or draw the > different columns using separate DrawString calls. > Ok, I can use a different, non-proportional font. That would probably be the simplest solution, yes. > But I don't know how to > concatenate the drawstring calls. So, if I understand you, I can call as > many DrawString calls as I want in a single print; the trick is to format > each so they don't overlap. Is that correct? Sounds about right to me. You can call MeasureString with some arbitrary "as wide as it will get" string to work out distances - or hard code them, I guess. Hopefully someone who's actually *done* some printing in .NET will chime in at some point... SignatureJon Skeet - <skeet@pobox.com> http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet World class .NET training in the UK: http://iterativetraining.co.uk By the way, I tried using Microsoft.VisualBasic.vbTab, but that didn't seem to do anything, even when I concatenated 2 or 3 together. Ross >> Thanks for the response, Jon. As I was posting a snippet of the code, >> I noticed a problem with the code. Correcting did prove that the trim [quoted text clipped - 31 lines] > Does the position of column 3 vary in a predictable way? Does column 2 > line up?
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