if (LastResponse.StatusCode != System.Net.HttpStatusCode.OK)
    {
      WebTestRequest request4 = new WebTestRequest("http://testserver/website/register.aspx");
      request4.ThinkTime = 9;
      ExtractHiddenFields rule2 = new ExtractHiddenFields();
      rule2.ContextParameterName = "1";
      request4.ExtractValues += new EventHandler(rule2.Extract);
      yield return request4;

      WebTestRequest request5 = new WebTestRequest("http://testserver/website/register.aspx");
      request5.ThinkTime = 5;
      request5.Method = "POST";
      FormPostHttpBody request5Body = new FormPostHttpBody();
      request5Body.FormPostParameters.Add("__VIEWSTATE",
this.Context["$HIDDEN1.__VIEWSTATE"].ToString());
      request3Body.FormPostParameters.Add("username",
this.Context["DataSource1.Credentials.UserName"].ToString());
      request3Body.FormPostParameters.Add("password",
this.Context["DataSource1.Credentials.Password"].ToString());
      request5Body.FormPostParameters.Add("confirmpassword",
this.Context["DataSource1.Credentials.Password"].ToString());
      request5.Body = request5Body;
      yield return request5;
    }

循环
 Web 测试执行搜索，然后在搜索结果中连接每个链接。
using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.VisualStudio.TestTools.WebTesting;

public class LoopingCoded : WebTest
{
  public LoopingCoded()
  {
  }

  public override IEnumerator GetRequestEnumerator()
  {
    // Issue a search for the term "Microsoft"

    WebTestRequest request7 = new WebTestRequest("http://testserver/website/Search.aspx");
    request7.ThinkTime = 20;
    request7.Method = "POST";
    FormPostHttpBody request7Body = new FormPostHttpBody();
    request7Body.FormPostParameters.Add("txtSearch", "Microsoft");
    request7.Body = request7Body;
    yield return request7;

    // Loop through each anchor tag in the search result and issue a request to each tag's target url (href)

    foreach (HtmlTag tag in this.LastResponse.HtmlDocument.GetFilteredHtmlTags("a"))
    {
      WebTestRequest loopRequest = new WebTestRequest(tag.GetAttributeValueAsString("href"));
      yield return loopRequest;
    }
  }
}

细粒度的事件处理
 Web 测试将两个请求的响应体记录到磁盘，以用于调试和基准调整。
// Log this response out to a file
 WebTestRequest request2 = new WebTestRequest("http://testserver/website/products.aspx");
    request2.ThinkTime = 2;
    request2.QueryStringParameters.Add("CategoryID", "14", false, false);
    request2.PostRequest += new EventHandler(request2_PostRequest);
    yield return request2;

    WebTestRequest request3 = new WebTestRequest("http://testserver/website/products.aspx");
    request3.ThinkTime = 2;
    request3.QueryStringParameters.Add("CategoryID", "15", false, false);
    yield return request3;

    // Log this response out to a file, too

    WebTestRequest request4 = new WebTestRequest("http://testserver/website/products.aspx");
    request4.ThinkTime = 1;
    request4.QueryStringParameters.Add("CategoryID", "20", false, false);
    request4.PostRequest += new EventHandler(request4_PostRequest);
    yield return request4;
  }

  void request2_PostRequest(object sender, PostRequestEventArgs e)
  {
    File.WriteAllBytes("c:\\request2.html", e.Response.BodyBytes);
  }

  void request4_PostRequest(object sender, PostRequestEventArgs e)
  {
    File.WriteAllBytes("c:\\request4.html", e.Response.BodyBytes);
  }
粗粒度：表示类别级，即仅考虑对象的类别(the   type   of   object)，不考虑对象的某个特定实例。比如，用户管理中，创建、删除，对所有的用户都一视同仁，并不区分操作的具体对象实例。  
细粒度：表示实例级，即需要考虑具体对象的实例(the   instance   of   object)，当然，细粒度是在考虑粗粒度的对象类别之后才再考虑特定实例。比如，合同管理中，列表、删除，需要区分该合同实例是否为当前用户所创建。  
一般权限的设计是解决了粗粒度的问题，因为这部分具有通用性，而细粒度可以看成业务部分，因为其具有不确定性。

模拟 Web JavaScript
Web 测试引擎工作在 HTTP 层并且不运行 JavaScript。以影响 HTTP 层的方式依赖于 JavaScript 的 Web 站点，可使用编码的 Web 测试模拟通常由 JavaScript 执行的逻辑。例如下面一段JS
<script type="text/javascript">
//get rid of some common non-digit characters
// in the phone number string function FixPhoneNumber()
{
var phoneNumberElement = document.getElementById('phoneNumber');
var number = phoneNumberElement.value;
number = number.replace('-', '');
number = number.replace('(', '');
number = number.replace(')', '');
number = number.replace(' ', '');
phoneNumberElement.value = number;
return true;
}
<div>
<input name="phoneNumber" id="phoneNumber" type="text"/>
<input name="submit" type="submit" value="Submit" onclick="FixPhoneNumber()" />
</div>
通过编程后
public override IEnumerator GetRequestEnumerator()
    {
      WebTestRequest request1 = new WebTestRequest("http://testserver/testwebsite/default.aspx");
      yield return request1;

      WebTestRequest request2 = new WebTestRequest("http://testserver/testwebsite/showparameters.aspx");
      request2.Method = "POST";
      FormPostHttpBody request2Body = new FormPostHttpBody();
     
      //get the databound phone number from the context and
      // strip out certain characters to simulate JavaScript
      string phoneNumber = this.Context["PhoneNumber"].ToString();
      phoneNumber = phoneNumber.Replace("-", "");
      phoneNumber = phoneNumber.Replace("(", "");
      phoneNumber = phoneNumber.Replace(")", "");
      phoneNumber = phoneNumber.Replace(" ", "");

      request2Body.FormPostParameters.Add("phoneNumber", phoneNumber);
      request2Body.FormPostParameters.Add("submit", "Submit");
      request2.Body = request2Body;
      yield return request2;
    }

运行并调试编码的Web 测试
对WebTest编程后，需要运行编码的WebTest，验证是否通过
在 Test View 或 Test Manager 窗口中选择该测试，并单击 Run 工具栏按钮