Event handling in Asp.net dropdownlist when the selected index is changed

Question

I am facing an issue with the dynamic controls in my ASP.NET page.

For example, I have created a TextBox dynamically with the following code:

TextBox ratingtxtbox = new TextBox();
ratingtxtbox.ID = "Rating_1";

And also a DropDownList like this:

DropDownList Exsecondpositiontxtbox = new DropDownList();
Exsecondpositiontxtbox.ID = "Exacta2nd_" + i.ToString();

I have added a keyup event for the textbox using this code:

ratingtxtbox.Attributes.Add("onkeyup", "ChangebyWin(" + i.ToString()+")");

This works perfectly. However, when I tried to add an indexchanged event for the dropdown list using this code:

Exsecondpositiontxtbox.Attributes.Add("onselectedindexchanged", "ChangebyExacta(" + i.ToString() + ")");

It doesn't work. Do you think it could be due to an error in the key name?

Answer 1

Answer №1

It is recommended to utilize the onchange attribute instead of OnSelectedIndexChanged which is specifically for server-side events.

Exsecondpositiontxtbox.Attributes.Add("onchange", "ChangebyExacta(" + i.ToString() + ")");

If you want to implement OnSelectedIndexChanged, follow this example:

Exsecondpositiontxtbox.SelectedIndexChanged += SomeEventHandler;

Answer 2

It is recommended to utilize the onchange attribute instead of OnSelectedIndexChanged which is specifically for server-side events.

Exsecondpositiontxtbox.Attributes.Add("onchange", "ChangebyExacta(" + i.ToString() + ")");

If you want to implement OnSelectedIndexChanged, follow this example:

Exsecondpositiontxtbox.SelectedIndexChanged += SomeEventHandler;

Answer 3

give this a shot

CreateFunction.Attributes.Add("onchange", "AdjustByExacta(" + i.ToString() + ")");

Answer 4

give this a shot

CreateFunction.Attributes.Add("onchange", "AdjustByExacta(" + i.ToString() + ")");