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Some simple C# calculator application questions. Link26004-Jan-04 22:58 Link2600 4-Jan-04 22:58  I'm designing a Calculator application in C#. However, I have some questions about it. 1.) How can I enter multiple lines in a Message Box? For example: MessageBox.Show("This Calculator was originally designed on Java. It was modified by Alex in C#.", "About this Calculator"); It will display it in a whole sentance like this: This Calculator was originally designed on Java. It was modified by Alex in C#. However, I want to split into two sentance like this: version v1.0 This Calculator was originally designed on Java. It was modified by Alex in C#. 2.) Also, I wonder if it is possible to include a link to my e-mail in the Message Box? 3.) How can I stop people from resizing the form (frame)? 4.) How can I disable the maximize button (but I want to keep the minimize and close buttons) like how the Calculator in the Windows XP did it. Thanks. Re: Some simple C# calculator application questions. Colin Angus Mackay4-Jan-04 23:09 Colin Angus Mackay 4-Jan-04 23:09  1. Inject Environment.NewLine in to the string at the appropriate point. 2. Not that I know of 3. Choose a FormBorderStyle that does not permit resizing (e.g. FixedSingle) 4. Set MaximizeBox to false --Colin Mackay-- Re: Some simple C# calculator application questions. Link26004-Jan-04 23:26 Link2600 4-Jan-04 23:26  First of all, thanks for your reply. I'm a C# and windows programming newbie, can you be more specific with some codes? 1. Inject Environment.NewLine in to the string at the appropriate point? What do you mean? 3. public class Calculator : System.Windows.Forms.Form that is the class. so how do I choose FixedSingle? 4. How can I set the MaximizeBox to false? Re: Some simple C# calculator application questions. Colin Angus Mackay4-Jan-04 23:50 Colin Angus Mackay 4-Jan-04 23:50  1. string.Concat("Line 1 Test", Environment.NewLine, "Line 2 Text") 3. You should have been able to find that very easily in the documentation. Search MSDN (or Google) to get full information about it. http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfsystemwindowsformsformclassformborderstyletopic.asp[^] 4. Again, read the documentation. MaximizeBox (and FormBorderStyle) is on the Form class. http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfSystemWindowsFormsFormClassMaximizeBoxTopic.asp[^] --Colin Mackay-- Re: Some simple C# calculator application questions. Heath Stewart5-Jan-04 5:00 Heath Stewart 5-Jan-04 5:00  Alex Ngai wrote: 2.) Also, I wonder if it is possible to include a link to my e-mail in the Message Box? No. You'll have to create your own dialog class that looks like the dialog that MessageBox.Show displays. Otherwise, just put your email address in a LinkLabel in a Form to be used as your About box from the Help menu. Since you're a newbie and asking pretty basic questions, you should also read the .NET Framework SDK, especially reviewing the class library to see what's available. Many of the properties on the Form class are easily set (as Colin showed you). Being familar with the class library (not necessarily memorizing it) and truly understanding the .NET Framework (like that all compilers for all languages targeting the CLR produce IL so the source language really doesn't matter, which is a common misunderstanding) is important.   -----BEGIN GEEK CODE BLOCK----- Version: 3.21 GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++ -----END GEEK CODE BLOCK----- how can i build start menue - like in my program??? warelord4-Jan-04 21:52 warelord 4-Jan-04 21:52  I appretiate your help if you tell me how can i build start menue-like in my program using C#.... please respons to me on: sfayoumy@hotmail.com or sfayoumy@yahoo.com Re: how can i build start menue - like in my program??? Heath Stewart5-Jan-04 4:54 Heath Stewart 5-Jan-04 4:54  Put a Button in your application. Create a ContextMenu and when the user clicks your button call ContextMenu.Show passing the Button reference and the position (like the Button.Location property value) to the method. See the ContextMenu.Show method in the .NET Framework SDK documentation for more information and even an example. But again - like we told you the first time - this is way-overdone and will most likely only confuse users. Read the Windows UI guidelines I linked you.   -----BEGIN GEEK CODE BLOCK----- Version: 3.21 GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++ -----END GEEK CODE BLOCK----- HatchStyle Brush from string LordMMD4-Jan-04 21:34 LordMMD 4-Jan-04 21:34  hi, how can i set a brush to a hatch style brush in runtime if i know the name of hatchstyle brush(a string) ia sth like "Cross", ??? Help Please! Re: HatchStyle Brush from string Heath Stewart5-Jan-04 4:50 Heath Stewart 5-Jan-04 4:50  string name = "Cross"; // Or some user-defined value, etc. HatchStyle style = Enum.Parse(typeof(HatchStyle), name); See Enum.Parse in the .NET Framework SDK documentation for more details.   -----BEGIN GEEK CODE BLOCK----- Version: 3.21 GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++ -----END GEEK CODE BLOCK----- Re: HatchStyle Brush from string LordMMD5-Jan-04 23:44 LordMMD 5-Jan-04 23:44  hi, i tried that but it won't work and says that: Cannot implicitly convert type 'object' to 'System.Drawing.Drawing2D.HatchStyle' There is no SaveGame in real life. Re: HatchStyle Brush from string Heath Stewart6-Jan-04 2:05 Heath Stewart 6-Jan-04 2:05  Sorry, I forgot the cast. The word "implicitly" should've given you a clue to explicitly cast, though.   -----BEGIN GEEK CODE BLOCK----- Version: 3.21 GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++ -----END GEEK CODE BLOCK----- Re: HatchStyle Brush from string LordMMD5-Jan-04 23:58 LordMMD 5-Jan-04 23:58  hey i found that , thats it , just it!!! ::: HatchStyle style = (HatchStyle)Enum.Parse(typeof(HatchStyle),"Some Value"); There is no SaveGame in real life. C# convention!! abc8764-Jan-04 21:02 abc876 4-Jan-04 21:02  What is beter convention in C#: 1) To keep each class in seperate .CS file OR 2) Keep all classes of same namespace in a single .CS file i know both ways work.. but just wanna know what is a better convention Muhammad Shoaib Khan http://geocities.com/lansolution Re: C# convention!! Colin Angus Mackay4-Jan-04 21:36 Colin Angus Mackay 4-Jan-04 21:36  One Class - One File (In my opinion) Having all of one namespace in a single cs file could get very very crowded. --Colin Mackay-- Re: C# convention!! Paul Watson4-Jan-04 21:41 Paul Watson 4-Jan-04 21:41  In general, what Colin said. Option 1. Though of course enumeration classes and tightly related classes often stay in one file for me. regards, Paul Watson Bluegrass South Africa Brian Welsch wrote: "blah blah blah, maybe a potato?" while translating my Afrikaans. Crikey! ain't life grand? Einstein says... Re: C# convention!! Heath Stewart5-Jan-04 4:47 Heath Stewart 5-Jan-04 4:47  Same with me. I also tend to use regions in those cases, too.   -----BEGIN GEEK CODE BLOCK----- Version: 3.21 GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++ -----END GEEK CODE BLOCK----- Re: C# convention!! Paul Watson5-Jan-04 4:51 Paul Watson 5-Jan-04 4:51  >I also tend to use regions in those cases, Regions are a god send when you have rafts of ugly collection/enumeration code cluttering up a simple enough class. regards, Paul Watson Bluegrass South Africa Brian Welsch wrote: "blah blah blah, maybe a potato?" while translating my Afrikaans. Crikey! ain't life grand? Einstein says... Re: C# convention!! Heath Stewart5-Jan-04 5:19 Heath Stewart 5-Jan-04 5:19  True. I especially like them for explicit interface implementations! Sure eliminates a lot of code that probably just calls similarly named methods on the class that implements it.   -----BEGIN GEEK CODE BLOCK----- Version: 3.21 GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++ -----END GEEK CODE BLOCK----- Re: C# convention!! Peter Reiter5-Jan-04 5:21 Peter Reiter 5-Jan-04 5:21  numero uno so everything is easier to remember Re: C# convention!! leppie5-Jan-04 6:04 leppie 5-Jan-04 6:04  One class per file, and of course real programmers use nested classes, so even then they tend to get big, hopefully .NET 2 will help out there. It would be nice to group files according to function. leppie::AllocCPArticle("Zee blog"); Seen on my Campus BBS: Linux is free...coz no-one wants to pay for it. Re: C# convention!! HAHAHA_NEXT5-Jan-04 7:32 HAHAHA_NEXT 5-Jan-04 7:32  One class per file except when the classes are small, very similar or closely related. I also put all rarely used classes in the same file. (Like by aggregation). God bless regions. DataGrid problem plz check Hayat4-Jan-04 20:52 Hayat 4-Jan-04 20:52  private void Mousedownhere(object sender, System.Windows.Forms.MouseEventArgs e) { DataGrid myGrid = (DataGrid) sender; System.Windows.Forms.DataGrid.HitTestInfo hti; hti = myGrid.HitTest(e.X, e.Y); string message = "You clicked "; switch (hti.Type) { case System.Windows.Forms.DataGrid.HitTestType.None : message += "the background."; break; case System.Windows.Forms.DataGrid.HitTestType.Cell : message += "cell at row " + hti.Row + ", col " + hti.Column; message += "Row Number : "+Convert.ToString(myGrid.CurrentRowIndex)+"\n\r"+ myGrid[hti.Row, hti.Column]; fscount = hti.Row; break; case System.Windows.Forms.DataGrid.HitTestType.ColumnHeader : message += "the column header for column " + hti.Column; break; case System.Windows.Forms.DataGrid.HitTestType.RowHeader : message += "the row header for row " + hti.Row; fscount = hti.Row; string cellvalue = Convert.ToString(myGrid[hti.Row,2]); // if (cellvalue==”CHINA”) MessageBox.Show("value is="+cellvalue,Convert.ToString(hti.Row)); break; //BUT IF I REMOVE THE COMMENTS FROM THE ABOVE if (cellvalue==”CHINA ”) THEN IT DOES NOT SHOW ME //THE MESSAGEBOX // WHY??????????????? } } Re: DataGrid problem plz check Heath Stewart5-Jan-04 4:45 Heath Stewart 5-Jan-04 4:45  Try debugging your code. Put a break-point at the beginning of that case and step through your code, checking the state of variables as you step over each line. And keep in mind that using the == operator for strings results in a case-sensitive comparison. See String.Compare for a better, culture-aware comparison with many more capabilities.   -----BEGIN GEEK CODE BLOCK----- Version: 3.21 GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++ -----END GEEK CODE BLOCK----- Re: DataGrid problem plz check Hayat6-Jan-04 6:37 Hayat 6-Jan-04 6:37  String comparison Is there any way so that all the below conditions give me true results. String val = “Hello” Now comparing val it with the following code. 1 “Hello “ //Note white space at the end of Hello. 2 “ Hello” //Note white space at the beginning of Hello. 3 “Hello “ //Note two white spaces left at the end. 4 “ Hello “ //Note white space both at thebegining and end of Hello. 5 “hello” //Note the caps change. 6 “HEllo” //Note the caps change. Thanks Re: DataGrid problem plz check Heath Stewart6-Jan-04 6:41 Heath Stewart 6-Jan-04 6:41  Look at the documentation for the String class - not reading won't teach you anything. Specifically, look at the Compare (like I mentioned before which can do case-insensitive and culture-specific comparisons) and Trim methods.   -----BEGIN GEEK CODE BLOCK----- Version: 3.21 GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++ -----END GEEK CODE BLOCK-----

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