如何在C＃中更改字符串路径的扩展名？

Question

以下是我的字符串值

string strFile = @"http://login.com/Uploads/g05fgxeto4dvsf5531yb3l45_16_8_2011_1_25_37.doc";

我需要用

替换这个文件路径值

http://login.com/Uploads/g05fgxeto4dvsf5531yb3l45_16_8_2011_1_25_37.pdf

感谢。

Answer 1

string pdfFile = Path.ChangeExtension(strFile, ".pdf");

Answer 2

string strFile = @"http://login.contentraven.com/Uploads/g05fgxeto4dvsf5531yb3l45_16_8_2011_1_25_37.DOC";

string strTemp = Path.GetExtension(strFile).ToLower();

if (strTemp==".doc")
{
    strFile = Path.ChangeExtension(strFile, "pdf");
}

Answer 3

像这样的例子

string strFile = @"http://login.com/Uploads/g05fgxeto4dvsf5531yb3l45_16_8_2011_1_25_37.doc";
string newString = String.Format("http://login.com/Uploads/{0}", strFile.Split('/').Last());

Answer 4

string strFile=@"http://login.contentraven.com/Uploads/g05fgxeto5531yb3l45_16_8_2011_1_25_37.DOC";


string strTemp = Path.GetExtension(strFile).ToLower();

if (strTemp==".doc")
{
    strFile = Path.ChangeExtension(strFile, "pdf");
}