将字符串和数字比较从VB6转换为C＃

Question

I have to translate some code from VB6 into C#. rs is a Recordset object:

If rs.Fields("mycolumn") < 5 Then
   myarray(Val(rs.Fields("mycolumn"))) = myarray(Val(rs.Fields("mycolumn"))) + 1".
End If

The problem here is comparing the column and number, because the column is a string. I already tried the VisualBasic Val()-method, but it doesn't behave totally the same?

I used this, but it doesn't give the same expression as the VB6 one. Some of the records pass thru, when they shouldn't.

if (Microsoft.VisualBasic.Conversion.Val(rs.Rows[k]["mycolumn"]) < 5)
{

}

Answer 1

您应该使用int.Parse或int.TryParse将字符串转换为数字，然后可以进行比较：

if(int.Parse(rs.Rows[k]["mycolumn"]) < 5) { ... }