C＃编译错误

Question

int[] ddfv = DropDownList1.SelectedItem.Value.ToString().Split('_').Select(part => int.Parse(part, System.Globalization.NumberStyles.Integer)).ToArray();

error : there is no .Select in String [] :(

there is a value like "1_2" I need to save 1 and 2 as integer values :)

Answer 1

Select is an extension method, defined in the System.Linq namespace.

The reason for the error is probably one of these:

• you are missing the reference to the assembly System.Core
• you are missing the using directive for Linq ( using System.Linq; )
• you are not using .NET 3.x

Answer 2

int[] value = DropDownList1.SelectedItem.Value.ToString().Split('_'); in the above "value" contains all split values, use index to fetch respective values ex: if DropDownList selected values is course_name_123 so i want only character before _ use the first line code and value[0] contains ur new data