我有一个页面,我必须根据用户选择动态加载控件。 比方说,我有这样的事情:需要重构解决方案
public static readonly Dictionary<string, string> DynamicControls = new Dictionary<string, string>
{
{ "UserCtrl1", "~/Controls/UserCtrl1.ascx" },
{ "UserCtrl2", "~/Controls/UserCtrl2.ascx" },
{ "UserCtrl3", "~/Controls/UserCtrl3.ascx" },
{ "UserCtrl4", "~/Controls/UserCtrl4.ascx"}
};
现在让我们比在该控件加载代码的网页上说是这样的:
protected void Page_Load(object sender, EventArgs e)
{
SomePanel.Controls.Add(GetControl());
}
private Control GetControl()
{
string dynamicCtrl = CurrentItem.DynamicControl;
string path = SomeClass.DynamicControls[dynamicCtrl];
Control ctrl = null;
//TODO: find a better way to load the controls
switch (dynamicCtrl)
{
case "UserCtrl1":
{
ctrl = (UserCtrl1)LoadControl(path);
}
break;
case "UserCtrl2":
{
ctrl = (UserCtrl2)LoadControl(path);
}
break;
case "UserCtrl3":
{
ctrl = (UserCtrl3)LoadControl(path);
}
break;
default:
{
throw new ApplicationException("Invalid dynamic control added.");
}
}
return ctrl;
}
页面具有所需的注册声明。任何想法如何我可以摆脱这个丑陋的开关语句?
你可能也想运行在那里的“内嵌温度与查询”重构..我会说nix的dynamicCtrl和CTRL变量..路径艾滋病的可读性,所以我会保持它。例如返回LoadControl(路径) – Gishu 2008-11-11 10:52:12