How to check the redundancy in the drop down list box dynamically?

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Hi All,

I want to add current year to drop down list dynamically. But if the value is already present in the drop down list then it should not be added again. I am able to add year to drop down list. But it gets added again and again every time the page is loaded. How to avoid this?

For example : Current year is 2012. Now the drop down list should only contain 2012. And when 2013 will come the drop down list should contain 2012 as well as 2013 and so on.

Thanks in advance...

Posted 14-Dec-12 19:45pm

rp786

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StackQ 15-Dec-12 1:51am

so simple,for each value u r inserting check them,in dropdownlist,if exist not add,else add,Follow logic

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Krunal Rohit · Answer 1 · 2012-12-14T19:53:00

If I understood correctly, you want to remove duplicate items from DropDown.. So here is your solution : (source)

C#

public static void RemoveDuplicateItems(DropDownList ddl)
{

for (int i = 0; i < ddl.Items.Count; i++)
{
ddl.SelectedIndex = i;
string str = ddl.SelectedItem.ToString();
for (int counter = i + 1; counter < ddl.Items.Count; counter++)
{
ddl.SelectedIndex = counter;
string compareStr = ddl.SelectedItem.ToString();
if (str == compareStr)
{
ddl.Items.RemoveAt(counter);
counter = counter - 1;
}
}
}
}