CODEWITHSUNDEEP
c#asp.net
Deepak Jangid
Deepak Jangid

Reputation: 11

Want to check whether a gridview contain duplicate value

I want to check a wether a gridview contain duplicate value on button click event

Upvotes: 0

Views: 2058

Answers (1)

Dhanushka Dayawansha
Dhanushka Dayawansha

Reputation: 356

This will find the duplicate values in dataGridView and add them to a alreadySeen list. Then show message box.

    private void button2_Click_1(object sender, EventArgs e)
    {
        int i = 0,j=0;
        string check1 = "",check2="";
        List<string> alreadySeen = new List<string>();

        for (i=0;i<dataGridView1.Rows.Count-1;i++)
        {
          check1 = this.dataGridView1.Rows[i].Cells[0].Value.ToString();
            j = i;
            for (j=j+1; j < dataGridView1.Rows.Count - 1; j++)
            {
              check2 = this.dataGridView1.Rows[j].Cells[0].Value.ToString();
                if (check1==check2)
                {
                    if (!alreadySeen.Contains(check1))
                        alreadySeen.Add(check1);
                }
            }   
         }

        //Show duplicate value
        foreach (var x in alreadySeen)
        {
            MessageBox.Show(x);
        }
    }

Upvotes: 2

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