使用c#回发后如何动态初始化用户控件的控件? [英] How to Dynamically initilatize controls of User control after postback using c#?
问题描述
我有一个Aspx页面和一个ascx页面.在aspx页面中,我有radTabstrip,在每个RadTb中,我都在使用Ascx.
我想在aspx页面中动态加载ascx页面的控件.
如果我再次尝试将值分配给ascx.cs页中的这些ascx控件,则无法在aspx页完成后立即找到ascx的控件.
它说了像标签这样的控件:
"Object reference not set to an instance of an object"
ASCX代码:
Hi,
I have a Aspx page and a ascx page. And in aspx page I have radTabstrip and in each RadTb I am using Ascx.
I want to dynamically load the controls of ascx page in aspx page.
It is not able to find the controls of ascx once after aspx page is done if I again try to assign value to those ascx controls in ascx.cs page.
It says for the controls like label:
"Object reference not set to an instance of an object"
ASCX code:
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
bindControls();
}public void bindControls()
{
//setting controlls values
lbl.text=some value;
}
}
ASpx代码:
ASpx Code:
protected voidGridView_RowCommand(object sender, GridViewCommandEventArgs e)
{
//calling the ascx method
acsxpage objacsxpage=new acsxpage();
objacsxpage.bindControls();
}
这里没有找到控件lbl.
谢谢,
请帮助解决此问题.
Here it is not fininding the control lbl.
Thanks,
Please help to resolve this issue.
推荐答案
我认为您正在创建新的用户控件,而不是从RadTab或使用的任何容器中找到用户控件. >
I think you are creating new user controls instead of finding the usercontrols from RadTab or from whatever container you are using.
acsxpage objacsxpage=new acsxpage();
除了上面的代码,您还必须访问已在aspx页面中初始化的实例.
Instead of the above code you have to access the instance which is already initialized in the aspx page.
它找不到,因为它无法直接访问它.
考虑一下:如果在另一个ASPX页面上使用此控件,则它将没有lbl
控件.那么控件应该怎么做?
找到更好的解决方案,或将lbl
实例传递给ASCX控制方法.
It can''t find it, because it has no direct access to it.
Think about it: if you use this control on a different ASPX page, it will not have albl
control. What is the control supposed to do then?
Find a better solution, or pass thelbl
instance through to the ASCX control method instead.
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