The basic idea here is to pull the id's from asp.net so that it can be used in a javascript environment.

   1  
   2  <input id="GetLocation" type="button" onclick="getLocation(<%=tbStreet.clientID %>.value + ' ' + <%=tbCity.clientID %>.value + ' ' + <%=tbState.clientID %>.value + ' ' + <%=tbZip.clientID %>.value,'<%=lblLocation.clientID %>');" value="Get Location" />

When using a DataTable in ADO.NET, you may want to search your table given a key. The Find method requires the index of the primary key to find the row that you're looking for. However, before you do this you must set the primary key of the Datatable. Setting the primary key in your database is not enough. To set the primary key, create a new column and then set the primary key field on the Datatable like so:

   1  
   2  
   3  // Create the DataColumn list for holding the columns of the primary keys. In this case, we are using only one primary key
   4  DataColumn[] primaryKeyColumns = new DataColumn[1];
   5  
   6  // Set the first primary key to the column 'id' in the datatable
   7  primaryKeyColumns[0] = myDataTable.Columns["id"];
   8  
   9  // Now apply the primary key to the datatable
  10  myDataTable.PrimaryKey = primaryKeyColumns;

// description of your code here

   1  
   2  private int GetUnReadMailCount()
   3  {
   4  string url=“http://mail.felixwoo.com/exchange/�; //指定Exchange�务器地� 
   5  System.Net.HttpWebRequest Request;
   6  System.Net.WebResponse Response;
   7  System.Net.CredentialCache MyCredentialCache;
   8  string strUserName = “wufâ€?; //指定登录的用户å??
   9  string strRootURI = url+strUserName ; //得到�访问邮箱的WebDAV地�
  10  string strPassword = “123456�; //指定该用户的密�
  11  string strDomain = “felixwoo.comâ€?; //指定域å??
  12  string strQuery ="";
  13  byte[] bytes = null;
  14  System.IO.Stream RequestStream = null;
  15  System.IO.Stream ResponseStream = null;
  16  XmlDocument ResponseXmlDoc = null;
  17  XmlNodeList HrefNodes= null;
  18  XmlNodeList SizeNodes= null;
  19  int count=0;
  20  try
  21  {
  22    // 用SQL查询WebDAV返回结果中的unreadcount节点.
  23    strQuery = "<?xml version=\"1.0\"?><D:searchrequest xmlns:D = \"DAV:\" >"
  24     + "<D:sql>SELECT \"DAV:displayname\",\"urn:schemas:httpmail:unreadcount\" FROM \"" + strRootURI + "\""
  25     + "</D:sql></D:searchrequest>";
  26  
  27    // 创建新的CredentialCache对象，构建身份凭�
  28    MyCredentialCache = new System.Net.CredentialCache();
  29    MyCredentialCache.Add( new System.Uri(strRootURI),
  30     "NTLM",
  31     new System.Net.NetworkCredential(strUserName, strPassword, strDomain)
  32     );
  33  
  34    // Create the HttpWebRequest object.
  35    Request = (System.Net.HttpWebRequest)HttpWebRequest.Create(strRootURI);
  36  
  37    // 指定HttpWebRequest的身份凭�，此处为关键所在。如果使用之�
  38    // 创建的MyCredentialCache，则这个身份凭�是�以从Web�务器传递
  39    // 到Exchange�务器的，但是这样带�的问题也很明显，就是�能够自
  40    // 动获�当�登录到域的用户的身份。�便已��功登录到域，那也�
  41    // 能通过formå†?次输入用户å??密ç ?。因此，我在这里用的是
  42    // Request.Credentials = CredentialCache.DefaultCredentials，
  43    // 这样便å?¯ä»¥èŽ·å¾—当å‰?用户的凭æ?®ï¼Œä½†æ˜¯è¿™æ ·å¸¦æ?¥çš„问题便是上é?¢æ??到的
  44    // 身份凭�无法传递的问题，解决方法请关注下篇文章。
  45    Request.Credentials = MyCredentialCache;
  46  
  47    // 指定WebDAV的SEARCH方法
  48    Request.Method = "SEARCH";
  49  
  50    // Encode the body using UTF-8.
  51    bytes = Encoding.UTF8.GetBytes((string)strQuery);
  52  
  53    // Set the content header length. This must be
  54    // done before writing data to the request stream.
  55    Request.ContentLength = bytes.Length;
  56  
  57    // Get a reference to the request stream.
  58    RequestStream = Request.GetRequestStream();
  59  
  60    // Write the SQL query to the request stream.
  61    RequestStream.Write(bytes, 0, bytes.Length);
  62  
  63    // Close the Stream object to release the connection
  64    // for further use.
  65    RequestStream.Close();
  66  
  67    // Set the content type header.
  68    Request.ContentType = "text/xml";
  69  
  70    // Send the SEARCH method request and get the
  71    // response from the server.
  72    Response = (HttpWebResponse)Request.GetResponse();
  73  
  74    // Get the XML response stream.
  75    ResponseStream = Response.GetResponseStream();
  76  
  77    // 创建XmlDocument对象，并获�收件箱的unreadcount节点的值
  78    ResponseXmlDoc = new XmlDocument();
  79    ResponseXmlDoc.Load(ResponseStream);
  80    HrefNodes = ResponseXmlDoc.GetElementsByTagName("a:displayname");
  81    SizeNodes = ResponseXmlDoc.GetElementsByTagName("d:unreadcount");
  82    for(int i=0;i<HrefNodes.Count;i++)
  83    {
  84     if(HrefNodes[i].InnerText=="收件箱")
  85      count=int.Parse(SizeNodes[i].InnerText);
  86    }
  87    ResponseStream.Close();
  88    Response.Close();
  89  }
  90  catch(Exception)
  91  {
  92    // Catch any exceptions. Any error codes from the SEARCH
  93    // method request on the server will be caught here, also.
  94    return -1;
  95  }
  96  return count;
  97  } 

This is from http://vv.cs.byu.edu/cs312-003/archives/2005/01/graph_visualiza.html. Go there for more info.

   1  
   2   private void button2_Click(object sender, System.EventArgs e) {
   3  
   4  string strCmdLine1 = "-Tsvg -o c:\\tmp\\foo.xml c:\\tmp\\ER.dot";
   5  string strCmdLine2 = "-Tsvg -o c:\\tmp\\foo.xml c:\\tmp\\Heawood.dot";
   6  System.Diagnostics.Process p = new System.Diagnostics.Process();
   7  
   8  p.StartInfo.FileName = "\"C:\\Program Files\\ATT\\Graphviz\\bin\\dot.exe\"";
   9  p.StartInfo.CreateNoWindow = true;
  10  p.StartInfo.UseShellExecute = false;
  11  if (graphIndex == 0)
  12  p.StartInfo.Arguments = strCmdLine2;
  13  else
  14  p.StartInfo.Arguments = strCmdLine1;
  15  
  16  p.Start();
  17  p.WaitForExit();
  18  
  19  axSVGCtl1.reload();
  20  graphIndex = (graphIndex + 1) % 2;
  21  }