ASP.NET C＃中的下拉列表DataValueField

Question

I have multiple items in asp drop down list and I want to set its DataValueField to one by one using loop. I did it as follow.

int cnt = ddl2.Items.Count;

for(int j=0;j<cnt;j++)
{
    string val = ddl2.Items[j].ToString();
    int datafieldid = // want datavaluefield id here
}

Please help.

Thanks.

Answer 1

if you want to assign value than you can do it with following code:

int datafieldid = ((ListItem)ddl2.Items[j]).Value;

or you can iterate listitem directly. Try following:

 foreach(var listItem in ddl2.Items)
    {
       datafeildid = listItem.Value;
    }

Answer 2

int cnt = ddl2.Items.Count;

for(int j = 0;j < cnt ; j++)
{   
    string val = ddl2.Items[j].ToString();
    int datafieldid =  ddl2.Items[j].value // want datavaluefield id here
}