How to: Display Command Line Arguments (C# Programming Guide)
Arguments provided to an executable on the command-line are accessible through an optional parameter to Main. The arguments are provided in the form of an array of strings. Each element of the array contains one argument. White-space between arguments is removed. For example, consider these command-line invocations of a fictitious executable:
Input on Command-line |
Array of strings passed to Main |
|---|---|
executable.exe a b c |
"a" "b" "c" |
executable.exe one two |
"one" "two" |
executable.exe "one two" three |
"one two" "three" |
Note
When you are running an application in Visual Studio, you can specify command-line arguments in the Debug Page, Project Designer.
Example
This example displays the command line arguments passed to a command-line application. The output shown is for the first entry in the table above.
class CommandLine
{
static void Main(string[] args)
{
// The Length property provides the number of array elements
System.Console.WriteLine("parameter count = {0}", args.Length);
for (int i = 0; i < args.Length; i++)
{
System.Console.WriteLine("Arg[{0}] = [{1}]", i, args[i]);
}
}
}
/* Output (assumes 3 cmd line args):
parameter count = 3
Arg[0] = [a]
Arg[1] = [b]
Arg[2] = [c]
*/
See Also
Tasks
How to: Access Command-Line Arguments Using foreach (C# Programming Guide)
Reference
Main() Return Values (C# Programming Guide)