Javascript Asp.net dropdownlist Onselectedindexchanged事件

我的asp.net页面中有一些动态控件

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

像

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

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

及

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

对于我的文本框，我将keyup事件添加为

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

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

它工作得很好

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

现在我添加了下拉列表的Indexchange事件作为

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

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

但是它不起作用。。是因为Key name.中的错误吗？

试试这个

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

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

---

您应该改用

onchange

OnSelectedIndexChanged

是一个服务器端事件

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

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

以下是如何在SelectedIndexChanged上使用

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

Exsecondpositiontxtbox.SelectedIndexChanged += SomeEventHandler;

你真的需要分享你的javascript代码。您是否还在这些控件上使用
clientdmode=Static
？因为除非您是，否则它实际上不会是ID。请尝试更改一次，而不是更改选定的索引。