为什么DropDownList事件在另一个事件之后触发

Question

我的页面中有一个DropDownList ：

<asp:DropDownList ID="ddlPra" ClientIDMode="Static" CssClass="chosen-select" runat="server" OnSelectedIndexChanged="Practice_SelectedIndexChanged"></asp:DropDownList>

背后的代码：

protected void Practice_SelectedIndexChanged(object sender, EventArgs e)
{
    MessageBox.Show(ddlCli.SelectedItem.Text);
}

我也有一个UpdatePanel ，它具有一个GridView that displays some data with links. The issue I am having is when the page loads and I change the option from the select drop down, I don't get an alert but when I click on anything inside the GridView that displays some data with links. The issue I am having is when the page loads and I change the option from the select drop down, I don't get an alert but when I click on anything inside the UpdatePanel中的GridView that displays some data with links. The issue I am having is when the page loads and I change the option from the select drop down, I don't get an alert but when I click on anything inside the会显示警报。

我如何解决它，以便DropDownList独立于UpdatePanel

Answer 1

为什么DropDownList事件在另一个事件之后触发？

由于尚未设置AutoPostBack="true" ，因此默认情况下为false 。 这意味着它不会在用户选择其他项目后立即回发。 但是无论如何，该事件都会在下一次回发中触发，而与导致该事件的控件无关。