确定整数是否是整数列表的成员

Question

I need to determine if a particular integer does not exists in a datagridview column. I assume I should create an array of the integers from the dgv column, and then compare if the integer exists in the array. However, there is perhaps an easier or simpler way.

I have looked at many articles but none of them resolve my task. Some of the Stack Overflow articles show similar solutions but I can't quite determine what to do.

For a = 0 To Dgv1.RowCount - 1
    If Not Dgv1(1, a).Value = Dgv0(1, m).Value Then
         Dgv0(1, Dgv0.RowCount - 1).Value = Dgv0(1, m).Value
     End If
Next

I hope to compare an integer with a column of integers in a datagridview and if it is present do nothing but if is not present add it to the datagrid view

Answer 1

Are you using wpf? If yes, create a model. provide a checking mechanism at the setter, use observablecollection or list then bind it to the datagirdview

Answer 2

Get the row and column of the datagridview

then compare (means condtional statement) to the variable you wanna check

and of course it should be inside of loop , loop count is equal to the count of rows you have in the datagridview.

Here's an example code:

Dim column As String = "YourColumnNameHere"
' Assuming 2 is the number you wanna compare
Dim value As Integer = 2

For row As integer = 0 to dataGridView.RowCount - 1

    If dataGridView.Rows(row).Cells(column).Value = value Then
        ' Do something here
    Else
        ' Do something here
    End If

Next