C截取定長字符串函數(shù)

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C#截取定長字符串函數(shù)

///summary

///

////summary

///paramname=str-/param

///paramname=length/param

///returnsstring/returns

publicstaticstringCutStr(stringstr,intlength)

{

inti=0,j=0;

foreach(charchrinstr)

{

if((int)chr127)

{

i+=2;

}

else

{

i++;

}

if(ilength)

{

str=str.Substring(0,j)+...;

break;

}

j++;

}

returnstr;

}

//

publicstringCutStr(stringsInString,intiCutLength)

{

if(sInString==null||sInString.Length==0||iCutLength=0){

return;

}

int

iCount=System.Text.Encoding.GetEncoding(Shift_JIS).GetByteCount(sInString);

if(iCountiCutLength)

{

intiLength=0;

C#截取定長字符串函數(shù)

for(inti=0;isInString.Length;i++)

{

int

iCharLength=System.Text.Encoding.GetEncoding(Shift_JIS).GetByteCount(newchar[]{sInString[i]});

iLength+=iCharLength;

if(iLength==iCutLength)

{

sInString=sInString.Substring(0,i+1);

break;

}

elseif(iLengthiCutLength)

{

sInString=sInString.Substring(0,i);

break;

}

}

}

returnsInString;

}

//

publicstaticstringCutStr(stringstringToSub,intlength){

Regexregex=newRegex([\u4e00-\u9fa5]+,piled);

char[]stringChar=stringToSub.ToCharArray();

StringBuildersb=newStringBuilder();

intnLength=0;

for(inti=0;istringChar.Length;i++)

{

if(regex.IsMatch((stringChar[i]).ToString())){

nLength+=2;

}

else

{

nLength=nLength+1;

}

if(nLength=length)

{

sb.Append(stringChar[i]);

}

C#截取定長字符串函數(shù)

else

{

break;

}

}

if(sb.ToString()!=stringToSub)

{

sb.Append(...);

}

returnsb.ToString();

}

//

///summary

///C#

////summary

///paramname=string1-/param

///paramname=Len1-/param

///returnsReCutStr/returns

publicstaticstringCutStr(stringstring1,intLen1){

stringReCutstr=string.Empty;

boolRemark=false;//

intn=string1.Length;

intTrueLen=0;

intPcount=0;//

intGcount=0;//

intLcount=0;//

char[]bytes=string1.ToCharArray();

foreach(charchrAinbytes)

{

if(Convert.ToInt32(chrA)=0Convert.ToInt32(chrA)=255)

{

Pcount=Pcount+1;

}

else//

{

Gcount=Gcount+1;

}

Lcount=(Pcount/2)+Gcount;