Dropdown selected index to populate a listbox

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Hi all,my listbox which inside the gridview and my dropdown is outside the gridview now i want to know how to load the listbox based on the selected index changed on the dropdownlistbox plz help me .....Thanx in advance

Posted 9-Sep-12 18:45pm

echosound

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Prasad_Kulkarni · Answer 1 · 2012-09-09T18:53:00

Solution 1

Please share your code snippets where you actually biding data with grid.
Have you tried debugging?
Are you able to fetch data from Database?

There are 3 simple step.
1. On DropDown List SelectedIndex Changed, take the selected values
2. Call you back end database based on the selected value for the dropdown list. Save the data in a dataset or where ever you want.
3. Bind it with Grid view.

Posted 9-Sep-12 18:53pm

Prasad_Kulkarni

Comments

echosound 10-Sep-12 0:57am

i want to load the listbox(gridview) based on the dropdown selected index changed how can i access the listbox which is inside the gridview

Prasad_Kulkarni 10-Sep-12 1:03am

You can access controls inside grid by using FindControl method.
Refer:
Accessing the different controls inside a GridView control[^]
Accessing Different Controls inside the GridView[^]

You can also just get the control from the gridview on postback, and get it's value that way.

echosound 10-Sep-12 1:06am

findcontrol is not coming in dropdownselectedindexchanged event

Prasad_Kulkarni 10-Sep-12 1:11am

Please refer the first link I have provided in my comment. It is a CP articles which completely describes with some code snippets. Have a look.

echosound 10-Sep-12 1:18am

its not working

echosound 10-Sep-12 1:19am

i can't able to get the listbox id inside the dropdown selectedindexchange event

Prasad_Kulkarni 10-Sep-12 1:22am

Is it possible for you to show your code snippets of what you're trying.

echosound 10-Sep-12 1:25am

code to populate the listbox inside grid ...
protected void assignReview_grid_RowDataBound(object sender, GridViewRowEventArgs e)
{
try
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
ListBox Lb = (ListBox)e.Row.FindControl("lstbox");
if (Lb != null)
{
lstdt = prfmqury.Reviwer_List();
Lb.DataSource = lstdt;
Lb.DataTextField = "ReviewerName";
Lb.DataValueField = "Reg_id";
Lb.DataBind();
}
}

}
catch (Exception ex)
{ }
}

echosound 10-Sep-12 1:27am

now i want filter the listbox items based on the dropdownselectedindexchanged(outside of gridview)

Afzal Shaikh · Answer 2 · 2012-09-09T19:09:00

Solution 2

You can access the listbox through id of the control(listbox) from itemtemplate.

c# code:

ListBox myListBox = (ListBox)gridviewname.rows.FindControl("ListBox1");

hope this will help.
Thanks,

Posted 9-Sep-12 19:09pm

Afzal Shaikh

Comments

echosound 10-Sep-12 1:13am

findcontrol is not coming in dropdownselectedindexchanged event

echosound 10-Sep-12 1:19am

i can't able to get the listbox id inside the dropdown selectedindexchange event

Afzal Shaikh 10-Sep-12 1:53am

create another method(pass aurgument selectedvalue to the method) and call it from selectedindex event and also provide commandname to gridview control and in editcommand event get the findcontrol :)