Round decimal (double) value with negative parameter using C# and VB.Net in ASP.Net

Hi jaya23leo,

Refer below code.

C#

protected void Calculate(object sender, EventArgs e)
{
    double d = 19745;
    Response.Write(DoubleRound(d, -2) + "<br/>");
    d = 19777;
    Response.Write(DoubleRound(d, -2));
}

private double DoubleRound(double value, int digits)
{
    if (digits >= 0)
    {
        return Math.Round(value, digits);
    }
    else
    {
        digits = Math.Abs(digits);
        double temp = value / Math.Pow(10, digits);
        temp = Math.Round(temp, 0);
        return temp * Math.Pow(10, digits);
    }
}

VB.Net

Protected Sub Calculate(ByVal sender As Object, ByVal e As EventArgs)
    Dim d As Double = 19745
    Response.Write(DoubleRound(d, -2) & "<br/>")
    d = 19777
    Response.Write(DoubleRound(d, -2))
End Sub

Private Function DoubleRound(ByVal value As Double, ByVal digits As Integer) As Double
    If digits >= 0 Then
        Return Math.Round(value, digits)
    Else
        digits = Math.Abs(digits)
        Dim temp As Double = value / Math.Pow(10, digits)
        temp = Math.Round(temp, 0)
        Return temp * Math.Pow(10, digits)
    End If
End Function

Output

19700

19800