Not display a repeated value in Gridview column

Question

User1769015664 posted

My gridview display data as follows; how do I display 1, 2 and 3 only once the first time and blank for the next records? I used the following code but it removes the Type from every other row.

Type     Value          Misc
1         Course 1       aaa
1         Course 2       bbb
1         Course 3       ccc
2         Course 4       ddd
2         Course 5       eee
2         Course 6       fff
3         Course 7       ggg 

string tempColumnValue = "";
	foreach (GridViewRow row in GridView1.Rows)
	{
		if (string.Compare(row.Cells[0].Text, tempColumnValue, true) == 0)
		{
			row.Cells[0].Text = "";
		}
		else
		{
			tempColumnValue = row.Cells[0].Text;
		}
	}