动态创建没有触发按钮单击事件

本文介绍了动态创建没有触发按钮单击事件的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我已经做了一些调查，在这，但没有我已经找到了解决方案，似乎为我的问题提供修复。我在C＃中asp web应用程序，我想动态添加一个选择是从下拉列表中进行后提交按钮。

保护无效的Page_Load（对象发件人，EventArgs的发送）{    submitButton.Text =提交;    submitButton.ID =提交按钮;    submitButton.Click + =新的EventHandler（submitButton_Click）;    SelectionDropDownList.SelectedIndexChanged + =新的EventHandler（SelectionDropDownList_SelectedIndexChanged）;}保护无效SelectionDropDownList_SelectedIndexChanged（对象发件人，EventArgs的发送）{    开关（SelectionDropDownList.SelectedIndex）    {        情况1：            //做了重定向            打破;        案例2：            Panel1.Controls.Add（提交按钮）;            打破;        案例3：            //做了重定向            打破;    }}保护无效submitButton_Click（对象发件人，EventArgs的发送）{    //不能得到这个事件激发。    SubmitSearch（）;}

解决方案

怎么样，而不是动态添加控件，随时添加，但设置可见=假开始。然后，你目前正在添加它，而不是只让可见光？

动态控制总是在web表单有点棘手。

I have done a bit of research on this but none of the solutions I have found seem to provide a fix for my issue. I have an asp web app in C# and I want to dynamically add a submit button after a selection is made from a drop down list.

protected void Page_Load(object sender, EventArgs e) { submitButton.Text = "Submit"; submitButton.ID = "submitButton"; submitButton.Click += new EventHandler(submitButton_Click); SelectionDropDownList.SelectedIndexChanged += new EventHandler(SelectionDropDownList_SelectedIndexChanged); } protected void SelectionDropDownList_SelectedIndexChanged(object sender, EventArgs e) { switch (SelectionDropDownList.SelectedIndex) { case 1: //does a redirect break; case 2: Panel1.Controls.Add(submitButton); break; case 3: //does a redirect break; } } protected void submitButton_Click(object sender, EventArgs e) { //can't get this event to fire. SubmitSearch(); }

解决方案

How about instead of dynamically adding the control, always add it, but set Visible=false initially. Then where you're currently adding it, instead just make it visible?

Dynamic controls are always a little tricky in webforms.