通过类名所对应的字符串获得类实例的方法代码,Asp.Net代码库,德仔网

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【Asp.Net】通过类名所对应的字符串获得类实例的方法

作者:Dezai.CN / 发布于2011/7/26/ 755

<div>
using System;
using System.Reflection;
using System.Web;
using System.IO;
public class site3 : IHttpHandler {
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/html";
int x = 0;
int y = 0;
int z = 0;
System.Collections.Generic.Dictionary<string, string> dic = new System.Collections.Generic.Dictionary<string, string>();
dic.Add("+","Add");
dic.Add("-","Sub");
dic.Add("*", "Mul");
dic.Add("/", "Div");
if (!string.IsNullOrEmpty(context.Request.Form["hidden"]))
{
if (int.TryParse(context.Request.Form["txtNum1"], out x) && int.TryParse(context.Request.Form["txtNum2"], out y))
{
Add add = new Add();
Icalcable ical=null;
string ssssss= Assembly.GetAssembly(add.GetType()).FullName;
string sssss = Assembly.GetAssembly(add.GetType()).GetName().Name;
string classname = dic[context.Request.Form["select1"]];
AssemblyName[] asss= Assembly.GetExecutingAssembly().GetReferencedAssemblies();//加载当前运行程序集所引用的程序集
foreach (AssemblyName item in asss)//遍历引用的程序集
{
string sss = item.Name;
try
{
ical= Assembly.Load(sss).CreateInstance(classname) as Icalcable;
if (ical != null)
{
break;
}
}
catch (Exception)
{


}
s

}
z = ical.Calculate(x,y);
}
}
System.Text.StringBuilder sbHtml = new System.Text.StringBuilder("<html><header><title></title><body><form action='site3.ashx' method='post'><input type='text' name='txtNum1' value=" + x + " /><select name='select1'><option>+</option><option>-</option><option>*</option><option>/</option></select><input type='text' name='txtNum2' value=" + y + ">=<input type='text' value=" + z + " name='txtResult'><input type='submit' value='计算'><input type='hidden' name='hidden' value='1' /></form>");
context.Response.Write(sbHtml.ToString());
}

public bool IsReusable {
get {
return false;
}
}
}
</div>

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