C#: Multilingual application

This is all about developing an application which supports multiple languages.
So that, you need two or more resource files as you need. These files hold the translations corresponding to languages.
As shown bellow figure, you can add resource files to your application. (C#.NET 2005).

C# :Count the total number of lines in RichTextBox

All you have to use is RichTextBox.GetLineFromCharIndex method.

int lineNumber = richTextBox1.GetLineFromCharIndex(richTextBox1.TextLength) + 1;
MessageBox.Show(lineNumber.ToString());

This 2 lines of code will give you number of lines in RichTextBox

You will find more detailed explanation here:
GetLineFromCharIndex[^]

Here is complete example of counting total number of lines in RTB

C#: Read from excel file

I used .NET 2.0 framework. Reading from excel file is depends on excel's version, not entirely but it will affect your source code little bit.

Here is little tip about reading excel file.

string mFileName; // file name which you will read from.
System.Data.OleDb.OleDbConnection connection;
string mSheetName; // excel file consists of many sheets / pages.
System.Data.OleDb.OleDbDataAdapter dtAdapter;

Reading from excel file is as same as reading from database, so that you will need connection string which helps you to connect your program to excel sheets, as well as dataAdapter which will retrieve data from excel sheet.

This function accepts 2 arguments which are describe excel file's name, and it's version.
If you are using excel 2007 then send true as a second argument, or else send false when you call this function.

C#: Read from command Prompt

I've been trying to read from Command prompt using c#. My application supposed to read lines from cmd whatever it shows. My Purpose was developing code editor and using external compiler.
 You need to use  System.Diagnostics.Process(System.Diagnostics.ProcessStartInfo).


System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo("file.exe", "command");
startInfo.RedirectStandardError = true;
startInfo.RedirectStandardOutput = true;
startInfo.StandardOutputEncoding = //change if you need, you might need it
startInfo.StandardErrorEncoding = //change if you need, you might need it
//...

Using this example, file.exe could be any executable file and command, it should be related to exe file. In this example, file.exe is "cmd.exe" and "command" is "RUNCOB"

C#: System data types

C# Shorthand	System Type	Range	Meaning in life
sbyte	System.Sbyte	-128 to 127	Signed 8-bit number
byte	System.byte	0 to 255	Unsigned 8-bit number
short	System.Int16	-32.768 to 32.767	Signed 16-bit number
ushort	System.UInt16	0 to 65.535	Unsigned 16-bit number
int	System.Int32	-2.147.483.648 to 2.147.483.647	Signed 32-bit number
uint	System.UInt32	0 to 4,294,967,295	Unsigned 32-bit number
long	System.Int64	–9,223,372,036,854,775,808 to 9,223,372,036,854,775,807	Signed 64-bit number
ulong	System.UInt64	0 to 18,446,744,073,709,551,615	Unsigned 64-bit number
char	System.Char	U0000 to Uffff	A single 16-bit Unicode character
float	System.Single	1.5x10-45 to 3.4x1038	32-bit floating point number
double	System.Double	5.0x10-324 to 1.7x10308	64-bit floating point number
bool	System.Boolean	true or false	Represents truth or falsity
decimal	System.Decimal	100 to 1028	A 96-bit signed number
string	System.String	Limited by system memory	Represents a set of Unicode characters
object	System.Object	Any type can be stored in an object variable	The base class of all types in the .NET universe

C# : Detecting cursor position in RichTextBox

When i was working on RichTextBox the main thing that i had to handle was counting lines and detecting cursor position. Now lets see how to get these things done. Let me tell you about how to detect cursor position.

You need to use:
RichTextBox.SelectionStart and RichTextBox.GetLineFromCharIndex()
But make sure you use instance method of RichTextBox class as show
here :GetLineFromCharIndex[^] and GetLineFromCharIndex[^]
    

private static int EM_LINEINDEX = 0xbb;

int index, line, col;

[DllImport("user32.dll")]

extern static int SendMessage(IntPtr hwnd, int message, int wparam, int lparam);   

[DllImport("user32.dll")]

This line of code shouldn't be written in any method or functions.
You will find detailed explanation here:
 DllImportAttribute[^]