how to set index of dropdownlist

Hi Dharmesh,

Try this

dropdownlist.SelectedValue = dropdownlist.Items.FindByText("b").Value;

thanks


let me try



thanks

If it is also correct then it might be problem of blank spaces or this also not working again then try it using SelectedValue. But more work you need to do this
Best luck

its not a problem of lower case or upper case

cos whatever value in dropdown as i save my database in another page

i mean if dropdown has list of country like India,Pakistan then i search like India not india

so its shuld me given me any result apart -1


southing wrong

I think so you did not understood my code. I'm not saying that access sqldatasource in your code behind bind your dropdownlist without using sqldatasource. But it will work with sqldatasource also just follow my last post. The major issue here is you getting -1 is the case of listitem. try

string _item="b";
string _item1=_item.ToUpper();//or tolower
and then pass it to ListItem b = new ListItem(_item1);
//this is because of your dropdownlist might contains either uppercase or lowercase and your passing opposite to it. Correct it will work.

Actually no need to change the code your code only can work but check it your dropdownlist contains given listitem in it. This might be a case issue also. You are saying it is returning -1 as index because your dropdownlist dose not contains the given listitem. So please check out whatever listitem you are giving in this line
 ListItem b = new ListItem("b");//here
here i'm giving "b" if it is present then it will return the index of b if it is not present then it will return -1 only. So just follow the case of "b" i.e. uppercase or lowercase.

and this is not a solution


how to access sqldatasource in code bhind

but this thing change thousnds  of line code in my application
so i cant do that find another solution

try another

When we are binding our dropdownlist in aspx page it is design time but when we populate our controls with some code in code behind it is runtime. You have to populate you dropdownlist @ runtime in code behind like

Page_Load
{
if(!IsPostBack)
{
DataSet ds=GetValuesFromDataBase();//This is you method to get dataset from database.
DropDownList1.DataSource=ds.Tables[0];
DropDownList1.DataTextField="TextFieldWhichYouWnatToShow";
DropDownList1.DataValueField="ValueFieldWhichYouWantToShow";
DropDownList1.DataBind();
}
}

but my dropdownlist bind with sqldatasource on aspx page then how i do like this on page load

thanks

as per given code
 ListItem b = new ListItem("b");
this "b" must be present in your dropdownlist else it will not work. try instead of  sqldatasource by manual binding. In this way like

if (!IsPostBack)
        {
            DropDownList1.Items.Add("a");//here you can bind it manually also
            DropDownList1.Items.Add("b");
            DropDownList1.Items.Add("c");
            DropDownList1.Items.Add("d");
            ListItem b = new ListItem("b");
            int _index =Convert.ToInt32(DropDownList1.Items.IndexOf(b));
            DropDownList1.SelectedIndex = _index;
        }

thanks for reply but its return -1 as my last code
the problem is i bound dropdownlist by sqldatasource on aspx page thats wy not find the value in dropdownlist on page load

plz help me again

thanks

Try like this
 ListItem b = new ListItem("b");
            int _index =Convert.ToInt32(DropDownList1.Items.IndexOf(b));
            DropDownList1.SelectedIndex = _index;