CODEWITHSUNDEEP
c#
user1882441
user1882441

Reputation: 21

How to increment the folder number if folder already exist in a directory

Ex. If I created a folder with a folder name of IMG10001 but it was already exist in the target directory. The code below will make the folder name to IMG10001-1 but what I like to accomplish is to increment the folder name to IMG10002 if IMG10001 already exist in the target directory. 

string destinDir = dirPath + "\\" + this.Batch.BatchName;
int x = 0;
if (Directory.Exists(destinDir))
{
    do
    {
        x++;
        destinDir = dirPath + "\\" + this.Batch.BatchName + "-" + x.ToString();
    } while (Directory.Exists(destinDir));
}    
System.IO.Directory.Move(root,destinDir);

Upvotes: 1

Views: 1523

Answers (3)

Usman
Usman

Reputation: 3278

you can extract integer part from your string using Regex and increment it as 

string YourString = "IMG10001";
int IntegerPart = Convert.ToInt16(Regex.Match(s, "\\d+").ToString());
IntegerPart++;

Upvotes: 1

Jastill
Jastill

Reputation: 656

Assuming that BatchName always starts with "IMG", you can split the number out of the file. To make sure you get the highest number, loop through all the files and store the highest number found.

Once you have found the highest number, increment it by 1 and rebuild you filename ("IMG" + newNumber).

Upvotes: 1

Junnan Wang
Junnan Wang

Reputation: 657

//regular expression will work
Regex reg = new Regex("IMG(\\d+)$");
Match m = reg.match(this.Batch.BatchName);
int num = 10001;
if(m.success){
    int.tryParse(m.Groups[1].value,out num);
}
Return string.format("IMG{0}",num);

I just write these code in the input box, I haven't tried. but I think it should work

Upvotes: 2

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