Question

I ve got a program which starts with welcome screen "Enter the number of the random variables X" and this number refers to the columns. If it is entered 5 => a DataGridView will be created with 5 columns and 2 rows (first one is for random variable entered by the user, and the second is for probability). For example:

X 1 2 3 4 5 6

p 2 2 2 2 2 2

页: 1 So EX = x1*p1 + x2*p2 +... 这里的问题是:如何乘数,然后添加?

There are only 2 rows, that s how much I need :

I ve enabled only 2 rows, that s how much I must have for this program:

  Const allowedRows As Integer = 2

    Private Sub DataGridView1_UserAddedRow(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewRowEventArgs) Handles DataGridView1.UserAddedRow
        DataGridView1.AllowUserToAddRows = DataGridView1.RowCount <= allowedRows
    End Sub

    Private Sub DataGridView1_UserDeletedRow(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewRowEventArgs) Handles DataGridView1.UserDeletedRow
        DataGridView1.AllowUserToAddRows = DataGridView1.RowCount <= allowedRows
    End Sub

The loop is:

    For j = 0 To DataGridView1.Columns.Count
    For i As Integer = 0 To DataGridView1.RowCount - 1
        multi = CInt(DataGridView1.Rows(i).Cells(j).Value) * CInt(DataGridView1.Rows(i).Cells(j).Value)
    Next
    EX += multi
Next

我认为,它必须如此(它给OfRange例外),但我为什么在这里写字,这样,如果任何人知道如何做,我就非常感激。提前感谢。

Answer 1

我更熟悉Charp,这样,如果它不达到100%,就可宽恕我的辛子。

我感觉到,你走的路最多。如果我的VB syntax是......要么是正确的话,那么我就给这两套法典打下基础。

VB

For j = 0 To DataGridView1.Columns.Count          
   EX += CInt(DataGridView1.Rows(0).Cells(j).Value) * // mult p*X in each column
      CInt(DataGridView1.Rows(1).Cells(j).Value)      //  and add total  EX            
Next

C#

//Do math
int EX = 0;
for (int j = 0; j < dgv.Columns.Count; j++)
{
   EX += Convert.ToInt32(dgv.Rows[0].Cells[j].Value) *
      Convert.ToInt32(dgv.Rows[1].Cells[j].Value);
}

友情链接