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Finding Repeated Values in List String

Farhan Shariff

I want to check if there are repeated values in the List and if there are any then display print in a txt file

List Die_ID_refrence = new List();
//List stores All Die_ID from t0 sheet
for (int a = 0; a < table5.Rows.Count; a++)
{
Die_ID_refrence.Add(table5.Rows[a]["Die_ID"].ToString());

}

1 Reply

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Vulpes12y ago
Accepted answer
You could do this (untested):

List Die_ID_refrence = new List();
//List stores All Die_ID from t0 sheet
List duplicates = new List();

for (int a = 0; a < table5.Rows.Count; a++)
{
string s = table5.Rows[a]["Die_ID"].ToString();
if (Die_ID_refrence.Contains(s)) duplicates.Add(s);
Die_ID_refrence.Add(s); // add it whether duplicate or not
}

File.WriteAllLines("duplicates.txt", duplicates.Distinct());