[英]How to check if a record already exist in column?
我有一個帶有列index[0]
的DataGridView
我如何知道我輸入的值是否已存在於此列中並增加存在的row["Quantity"]
private void dataGridView1_CellEndEdit(object sender, DataGridViewCellEventArgs e)
{
if (e.ColumnIndex == 0)
{
//some code
}
}
//check if the value in same column is repeated dataGridView1:
for (int j = 0; j < dataGridView1.Columns.Count; j++)
{
for (int i = 0; i < dataGridView1.Rows.Count; i++)
{
for (int k = 0; k < dataGridView1.Columns.Count; k++)
{
if (dataGridView1.Rows[i].Cells[j].Value.ToString() == dataGridView1.Rows[i].Cells[k].Value.ToString())
{
//you can increase row["Quantity"] here
break;
}
}
}
}
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