how to write OnSelectedIndexChanged event

Question

4.33/5 (2 votes)

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Hi guys,

I'm very confused, how to write OnSelectedIndexChanged Event of a dropdownlist.

SCENARIO:

---------------------------------------------------------------------------
|Repeater 1                                                                |
---------------------------------------------------------------------------
| ------------------------------------------------------------------------ |
| |Repeater 2                                                             ||
| |-----------------------------------------------------------------------||
| |-----------------------------------------------------------------------||
| |WEB USER CONTROL WITH: DROPDOWNLIST N A TEXTBOX  - [1]                 ||
| |-----------------------------------------------------------------------||
| |WEB USER CONTROL WITH: DROPDOWNLIST N A TEXTBOX  - [2]                 ||
| |-----------------------------------------------------------------------||
| |WEB USER CONTROL WITH: DROPDOWNLIST N A TEXTBOX  - [3]                 ||
| |-----------------------------------------------------------------------||
| -------------------------------------------------------------------------|
----------------------------------------------------------------------------

I have populated d dropdownlist which is in d WebUserControl,
but, now the problem is,
How to write its "OnSelectedIndexChanged" event.
So that, If i select any value in d dropdownlist, its text should also appear in
the textbox of that WebUserControl.

Plzzzz guys help me.

thanks

Posted 23-Apr-14 0:04am

abdul subhan mohammed

Updated 23-Apr-14 0:07am

v3

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Comments

nandakishoreroyal 23-Apr-14 6:09am

Paste the code, then we can know where you have struck.

You should update the code what you have tried, dont paste these type of questions.

Sunasara Imdadhusen 23-Apr-14 6:31am

It would be great if you can provide code snippet!!

[no name] 23-Apr-14 6:31am

please show the code..

4 solutions

Solution 1

your requirement is not clear , i think you want OnSelectedIndexChanged event of the dropdown inside the Repeater

in the above case , add your dropdown outside the repeater and create that event (just click) after that cut that dropdown from there and paste inside Itemtemplate of the Repeater.

Posted 23-Apr-14 0:39am

Kan07

Updated 23-Apr-14 0:40am

v2

Comments

abdul subhan mohammed 23-Apr-14 10:16am

Dear, its in web user control...

Solution 4

C#

protected void rptrSection1_Bound(object sender, RepeaterItemEventArgs e)
{
var ctl = e.Item.FindControl("ddlS1") as SDropDownList;
ctl.SelectedIndexChanged += new EventHandler(ddlS1_SelectedIndexChanged);
}

[code]....

Posted 26-Apr-14 7:35am

abdul subhan mohammed

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Herman<T>.Instance · Accepted Answer · 2014-04-23T01:03:00

you can make the OnSelectedIndexChanged event in your web user control.
In the web user control you can make a

C#

public event Action<string>OnSelectedIndexChangedDropDownListEvent;

This event can be subscribed to by the pages that uses your web user control.
in the web user control in the method for the OnSelectedIndexChanged you write:

C#

if (OnSelectedIndexChangedDropDownListEvent!=null)
    OnSelectedIndexChangedDropDownListEvent(dropdownListNameHere.SelectedValue);

So the inner event is posted to the outside world via the OnSelectedIndexChangedDropDownListEvent.

abdul subhan mohammed · Accepted Answer · 2014-04-26T05:59:00

I just did this event as public under Web User Control code behind, i.e., WUC.cs:

public void ddlchemicals_SelectedIndexChanged(object sender, EventArgs e)
        {
            int recid = Convert.ToInt32(ddlchemicals.SelectedValue);
            DataTable dt = new DataTable();
            dt = bl.GetSelectedSubChemicals(recid);
            txtdescription.Text = dt.Rows[0]["Descriptions"].ToString();
            txtunit.Text = dt.Rows[0]["Units"].ToString();
            dt = null;
        }

that's it,

Thnx everyone

how to write OnSelectedIndexChanged event

4 solutions

Solution 1

Solution 2

Solution 4

Solution 3

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