problem in selecting value from fropdownlist

Question

3.00/5 (2 votes)

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in this code i am trying get value from dropdownlist and on button click show result on gridview. but problem is always select id=1 and show result against 1 value. please help me out.

C#

protected void Page_Load(object sender, EventArgs e)
        {


            DropDownList1.DataSource = rm.Rooms;
            DropDownList1.DataValueField = "roomid";
            DropDownList1.DataTextField = "roomname";
            DropDownList1.DataBind();

           

        }




        protected void Button1_Click(object sender, EventArgs e)
        {
            string selectvalue = DropDownList1.SelectedValue;
            int roomindex = Convert.ToInt32(selectvalue);

            Room selectroom = rm.Rooms.SingleOrDefault<Room>(room => room.roomid == roomindex);

            GridView1.DataSource = selectroom.Assets;
            GridView1.DataBind();
        }

Posted 17-Dec-13 20:48pm

fak_farrukh

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An@nd Rajan10 18-Dec-13 4:04am

what about solution 1 ?

4 solutions

Solution 1

i think the all selectedvalue as 1.

anyway try this code

C#

string selectvalue = DropDownList1.SelectedItem;

or

C#

string selectvalue = DropDownList1.Text;

please comment after your result

Posted 17-Dec-13 21:16pm

An@nd Rajan10

Updated 17-Dec-13 21:19pm

v2

Solution 2

Try this:-

string selectvalue = DropDownList1.SelectedItem.value;

Posted 17-Dec-13 21:33pm

TrushnaK

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Karthik_Mahalingam · Accepted Answer · 2013-12-17T21:52:00

Try like this

check for postback in page load..

C#

protected void Page_Load(object sender, EventArgs e)
       {

           if (!Page.IsPostBack)
           {
               DropDownList1.DataSource = rm.Rooms;
               DropDownList1.DataValueField = "roomid";
               DropDownList1.DataTextField = "roomname";
               DropDownList1.DataBind();
           }
       }

**Dnyaneshwar**@Pune · Accepted Answer · 2013-12-17T22:08:00

Solution 4

Add your code in ISPostBack.your page is getting postback on button click event.

Posted 17-Dec-13 22:08pm

Dnyaneshwar@Pune