路径显示不下时，中间显示省略号

Posted 2022-08-26 he-zhidan

开发环境：VS2012 C#

//路径显示不下时，中间显示省略号
class CShowShortPath

public CShowShortPath(string str)

//统一成反斜杠
str = str.Replace(‘/‘, ‘\\‘);

//收集反斜杆的位置
List<int> indexs = new List<int>();
for (int i = 0; i < str.Length; i++)

if (‘\\‘ == str[i])

indexs.Add(i);

//收集可能的显示形式
m_strCanShows.Add(str);
for (int j = indexs.Count / 2, i = j - 1; ; )

m_strCanShows.Add(GetShortShow(ref str, ref indexs, i, j));
if ((!ValidIndex(indexs,i)) && (!ValidIndex(indexs,j)) )

break;

if ((indexs.Count - 1 - j) > (i - 0))

j++;

else

i--;

public List<string> m_strCanShows = new List<string>();
private string GetShortShow(ref string str, ref List<int> indexs, int indexLeft, int indexRight)

string str1 = "", str2 = "";
if (ValidIndex(indexs,indexLeft))

str1 = str.Substring(0, indexs[indexLeft]);

if (ValidIndex(indexs,indexRight))

str2 = str.Substring(indexs[indexRight] + 1, str.Length - indexs[indexRight] - 1);

return str1 + "..." + str2;

private bool ValidIndex( List<int> indexs, int index)

return ( index >= 0 ) && ( index < indexs.Count ) ;


;

下面的类，根据TextBox的宽度显示文件路径：
public class CShow

public static void ShowSinglePathIfNoSpace(string strPath, TextBox txtBox)

ImeBase.CShowShortPath show = new ImeBase.CShowShortPath(strPath);
for (int i = 0; i < show.m_strCanShows.Count; i++)

int iNeedWidth = TextRenderer.MeasureText(show.m_strCanShows[i], txtBox.Font).Width;
if (txtBox.Width > iNeedWidth)

txtBox.Text = show.m_strCanShows[i];
break;