Loading an Image from file

[joe_pool_is]

Looking at the VS 2005 Express example for C++ "How to Modify the Size of Placement of a Picture at Run Time":

private:

void StretchPic()

{

// Stretch the picture to fit the control.

pictureBox1->SizeMode = PictureBoxSizeMode::StretchImage;

// Load the picture into the control.

// You should replace the bold image

// in the sample below with an icon of your own choosing.

pictureBox1->Image = Image::FromFile(String::Concat(

System::Environment::GetFolderPath(

System::Environment::SpecialFolder::Personal),

"\\Image.gif"));

}

Does not work. I can find the image ok, but the filename starts with "C:\Documents and ..." but the compiler breaks at the "C" (first letter).

Any idea why this example doesn't work?

[snarfblam]

Escape sequences? The backslach begins an escape sequence. \r is carrige return. \n is newline. For each backslash you want to place in a string, type in two: \\.

System::String path = "C:\\Documents and settings\\things and stuff\\file.exension"

[joe_pool_is]

Escape sequences? The backslach begins an escape sequence. \r is carrige return. \n is newline. For each backslash you want to place in a string, type in two: \\.

System::String path = "C:\\Documents and settings\\things and stuff\\file.exension"

Yes! I spent some time on this last night, and also came to this conclusion.

 

Why would Microsoft's example spit out strings that C++ can not use, namely GetFolderPath()? Do they typically show example code that has not been tested?

 

I don't suppose C++ has some built in function (that is compatible with MFC, STL, CLR, WIN32, etc.) for taking a string and doubling every "\" that it comes across, does it?

[PlausiblyDamp]

Not sure if it works in C++ (don't have it installed on the PC to test either) but in C# if you prefix the string with an @ symbol then it doesn't escape anything.

[joe_pool_is]

FWIW: The @ symbol didn't work.