ListItem itm = dropdownlist2.Items.FindByValue（firstdropdownlistValue）; 
 if （itm！=  null ）
 {
 dropdownlist2。 Items.Remove（ITM）; 
} 

  int  count = DropDownList。 Items.Count  -   1 ; 
 for （ int  i = count; i  >   0 ; i--）
 DropDownList.Items.RemoveAt（i）; 

 ListItem itemToRemove = myDropDown.Items.FindByValue（value）; 
 if（itemToRemove！= null）
 {
 myDropDown.Items.Remove（itemToRemove）; 
} 
或者如果您知道要删除的项目的索引，请使用RemoveAt方法：

 myDropDown.Items.RemoveAt（0）; 

I am using 2 dropdownlist in which i added same items....wen i click item in 1st dropdownlist i want that particular item not to be displayed in the second dropdownlist...plz help regarding this....



Regards

Manohara r

ListItem itm=dropdownlist2.Items.FindByValue(firstdropdownlistValue);
if(itm!=null)
{
dropdownlist2.Items.Remove(itm);
}

int count = DropDownList.Items.Count - 1;
for (int i = count; i > 0; i--)
    DropDownList.Items.RemoveAt(i);

ListItem itemToRemove = myDropDown.Items.FindByValue("value");
if (itemToRemove != null)
{
    myDropDown.Items.Remove(itemToRemove);
}
Or if you know the index of the item to remove, use RemoveAt method :

myDropDown.Items.RemoveAt(0);