我怎样下拉列表重定向，而不​​是一个按钮？ [英] How do I redirect with a Drop Down List, and not a Button?

问题描述

我期待到只使用一个DDL运行我的查询，而不是一个DDL和Button_Click功能。我还没有找到该怎么做。我该怎么做呢？

I am looking into using only a ddl to run my query, not a ddl and a Button_Click function. I am yet to find what to do. How do I do this?

推荐答案

在您为（P / C）X：

In your as(p/c)x:

<asp:DropDownList runat="server" 
                  id="ddl"
                  OnSelectedIndexChanged="SelectionChanged"
                  AutoPostBack="true">
    <asp:ListItem Text="Page 1" Value="/page1.aspx" />
    <asp:ListItem Text="Page 2" Value="/page2.aspx" />
</asp:DropDownList>

在的AutoPostBack属性告诉ASP.NET要连接，一旦提交表单的下拉列表更改客户端（JavaScript）的命令，而不是等待按下按钮。

The "AutoPostBack" property tells ASP.NET to wire up a client-side (javascript) command that submits the form as soon as the drop down list changes, instead of waiting for a button click.

而在你的codebehind，事件处理程序，我们在OnSelectedIndexChanged属性​​将被解雇引用的：

And in your codebehind, the event handler we referenced in the "OnSelectedIndexChanged" property will get fired:

protected void SelectionChanged(object sender, EventArgs e)
{
    Response.Redirect(((DropDownList)sender).SelectedValue);
}

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