/// <summary>
/// Generates a unique id for the entire document that this file element
/// belongs to.
/// </summary>
/// <param name="parentDirectory">The full path of the parent directory
/// for the filename.</param>
/// <param name="fileName">The name of the file to generate a unique
/// id for. This does not include any path.</param>
string GenerateUniqueId(string parentDirectory, string fileName)
{
string id = GenerateId(fileName);
WixDocument document = (WixDocument)OwnerDocument;
if (!document.FileIdExists(id))
{
return(id);
}
// Add the file's parent directory to the id.
string parentDirectoryName = WixDirectoryElement.GetLastDirectoryName(parentDirectory);
if (parentDirectoryName.Length > 0)
{
id = String.Concat(WixFileElement.GenerateId(parentDirectoryName), ".", id);
if (!document.FileIdExists(id))
{
return(id);
}
fileName = id;
}
// Add a number to the file name until we get a unique id.
int count = 0;
string idStart = Path.GetFileNameWithoutExtension(fileName);
string extension = Path.GetExtension(fileName);
do
{
++count;
id = String.Concat(idStart, count, extension);
} while (document.FileIdExists(id));
return(id);
}