自定义控件子控件初始化问题，高手请进！
public class TripalCheckList : System.Web.UI.WebControls.WebControl
{
private TextBox txtListContent;
private TextBox txtListID;
private string _DataTextField;
//构造函数
public TripalCheckList()
{
txtListContent = new TextBox();
txtListID = new TextBox();
}
protected override void CreateChildControls()
{
txtListContent = new TextBox();
txtListID = new TextBox();
txtListContent.ID = this.ClientID + "_Text ";
txtListID.ID = this.ClientID + "_Value ";
base.CreateChildControls ();
}
public string SelectedListText
{
set
{
txtListContent.Text = value;
}
get
{
return txtListContent.Text;
}
}
------在构造函数中初始化子控件，设计时拖拉到窗体可以呈现
但在获取子控件的值时，构造函数再次执行导致实例化一个新的子控件，丢失了值
如果不在构造函数中初始化子控件，则报错txtListContent未实例化
请问：怎么解决啊
[解决办法]
将值保存到viewstate中
[解决办法]
protected override void CreateChildControls()
{
txtListContent = new TextBox();
txtListID = new TextBox();
txtListContent.ID = this.ClientID + "_Text ";
txtListID.ID = this.ClientID + "_Value ";
base.CreateChildControls ();
}
偶的理解.
貌似构造函数里面NEW 了这里就不需要new TextBox()了..
[解决办法]
你的写法很奇怪哦，不过我建议你试着让.net自己去管理状态
protected override void CreateChildControls()
{
base.CreateChildControls();
txtListContent = new TextBox();
//添加到controls集合
this.Controls.Add(txtListContent);
....
}
[解决办法]
当 TripalCheckList 作为控件显示在WebForm上.
刷新时引起的重新构造,使得这个实例丢失原来保存的值?
