摘自:
依依杂菜馆**/
/// <summary>
/// 获取路径2相对于路径1的相对路径
/// </summary>
/// <param name="strPath1">路径1</param>
/// <param name="strPath2">路径2</param>
/// <returns>返回路径2相对于路径1的路径</returns>
/// <example>
/// string strPath = GetRelativePath(@"C:\WINDOWS\system32", @"C:\WINDOWS\system\*.*" );
/// //strPath == @"..\system\*.*"
/// </example>
public static string GetRelativePath(string strPath1, string strPath2)
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![](/Images/OutliningIndicators/ContractedBlock.gif)
{
if (!strPath1.EndsWith("\\" )) strPath1 += "\\"; //如果不是以"\"结尾的加上"\"
int intIndex = -1, intPos = strPath1.IndexOf('\\');
///以"\"为分界比较从开始处到第一个"\"处对两个地址进行比较,如果相同则扩展到
///下一个"\"处;直到比较出不同或第一个地址的结尾.
while(intPos >= 0)
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{
intPos ++;
if (string.Compare(strPath1, 0, strPath2, 0, intPos, true) != 0) break;
intIndex = intPos;
intPos = strPath1.IndexOf('\\', intPos);
}
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///如果从不是第一个"\"处开始有不同,则从最后一个发现有不同的"\"处开始将strPath2
///的后面部分付值给自己,在strPath1的同一个位置开始望后计算每有一个"\"则在strPath2
///的前面加上一个"..\"(经过转义后就是"..\\").
if (intIndex >= 0)
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{
strPath2 = strPath2.Substring(intIndex);
intPos = strPath1.IndexOf("\\", intIndex);
while(intPos >= 0)
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{
strPath2 = "..\\" + strPath2;
intPos = strPath1.IndexOf("\\", intPos + 1);
}
}
//否则直接返回strPath2
return strPath2;
}