如何从VB.NET中的二维数组中提取一维数组

Question

H I'm using VB.NET, and i have a two dimensional array. How do I extract a one-dimensional array from it? IE the 3rd row.

Something like MAT[0] which i would do in java to get the first row from a matrix.

Thanks.

Answer 1

使用括号代替圆括号：

mat(0)

Answer 2

I think you have to write a simple function to get a single row as an array, for example:

Private Function GetRow(matrix As Byte(,), row_number As Integer) As Byte()
    'get the number of columns of your matrix
    Dim number_of_columns As Integer = matrix.GetLength(1)

    'define empty array, at the end of the 'for' cycle it will contain requested row's values  
    Dim values As Byte() = Nothing

    For i As Integer = 0 To number_of_columns - 1
        'Resize array
        ReDim Preserve values(i)
        'Populate array element
        values(i) = matrix(row_number, i)
    Next

    Return values

End Function