Simple .NET/ASP.NET PDF document editor web control SDK

This DoUpdate() function is as follows: private void DoUpdate() { GetCompanyInfo(TextBox1.Text); lblPH.Text = GetPriceHistoryText(TextBox1.Text); lblPHGraph.Text = "<img src='PH.aspx ticker=" + TextBox1.Text + "&days=100' />"; lblAnalyticGraph.Text = "<img src='PHBB.aspx ticker=" + TextBox1.Text + "&days=100' />"; lblMoreQuote.Text = ""; } This function updates the company information pane as well as the price history text and graphs. In what you are exploring here the company information the first line is the most important; it s a call to the helper function called GetCompanyInfo. Here s what this function looks like: private void GetCompanyInfo(string strTicker) { companyInfo.CompanyInfoService svc = new companyInfo.CompanyInfoService(); companyInfo.CompanyInfoResult rslt = svc.doCompanyInfo("anything", "anything", strTicker); lblQuote.Text = rslt.company + " Current Price: " + rslt.lastPrice; } The proxy to the Flash-db.com web service is called companyInfo. An instance of this proxy is first created, called svc. This exposes an object of type CompanyInfoResult that is used to store the returned information from the service. The second line creates an instance of this type, called rslt, into which the results of a doCompanyInfo web method call are loaded. This web method takes three parameters; the first two are user name and password. The web service is open, so you can put anything in for the user name and password parameters. The third parameter is the ticker for which you are seeking the company information. The company name (rslt.company) is then appended to a string containing text (Current Price:), which in turn is appended to the last traded price for the stock (rslt.lastPrice). This is then assigned to the text property of lblQuote.

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elapsedSeconds += latestLapTime;

Note You should use the -project option only when creating a new project. When adding files to an

This has exactly the same effect as the previous expression. There are equivalents for the other mathematical operators, so -= means to subtract the expression on the right from the variable on the left, *= does the same for multiplication, and so on.

The first search in Example 12-7 is to find a customer whose first name is Douglas :

var query = from customer in customerXml.Element("Customers").Elements("Customer") where customer.Attribute("FirstName").Value == "Douglas" select customer; XElement oneCustomer = query.SingleOrDefault(); if (oneCustomer != null) { Console.WriteLine(oneCustomer); } else { Console.WriteLine("Not found"); }

existing project you need to add them to your project file by hand; otherwise, you ll lose any changes that have been made to the project file.

In general, you will have some ideas about the structure of XML documents you are going to process; otherwise, it will be difficult to find the information you want. Here we know the node we are looking for sits just one level below the root element. So the source of the LINQ query the part after the in keyword fetches the root Customers element using the singular Element method, and then asks for all of its children called Customers by using the plural Elements method:

from customer in customerXml.Element("Customers").Elements("Customer")

We specify the search conditions with a where clause, as we would do in any LINQ query. In this case, we want to search on the value of the FirstName attribute:

If you look back at the markup in Listing 11-1, you ll see that lblQuote is contained within the UpdatePanel control s <ContentTemplate> setting. Because the ScriptManager control has enabled partial rendering and because the label is within the UpdatePanel control, this enables the Ajax-style update of the page whenever lblQuote has its text property changed. You can see that there is no explicit coding for a partial-page update. Everything is handled under the hood by the Atlas runtime. You concentrate on building your application, and by wrapping standard ASP .NET controls with an <UpdatePanel>, you can enable the asynchronous functionality. You ll now see what happens when you click the ellipsis button in this page to render the extended price information. You can see from the markup that the button is called btnMore and that it has a click event handler called btnMore_Click. Here s a snippet from the markup as a reminder: <asp:Button ID="btnMore" runat="server" Text="..." OnClick="btnMore_Click" CausesValidation="False" /> This btnMore_Click event handler looks like this: protected void btnMore_Click(object sender, EventArgs e) { GetExtendedQuote(TextBox1.Text); } It simply calls a helper function, passing it the contents of the text box containing the ticker information entered by the user. This function looks like this: private void GetExtendedQuote(string strTicker) { companyInfo.CompanyInfoService svc = new companyInfo.CompanyInfoService(); companyInfo.CompanyInfoResult rslt = svc.doCompanyInfo("anything", "anything", strTicker); StringBuilder theHTML = new StringBuilder(); theHTML.Append("<table width='100%' cellspacing='0' cellpadding='0' style='border-width: 0'>"); theHTML.Append("<tr><td width='40%'>"); theHTML.Append("Bid "); theHTML.Append("</td><td width='40%'>"); theHTML.Append(rslt.bid); theHTML.Append("</td></tr>"); theHTML.Append("<tr><td width='40%'>"); theHTML.Append("Ask "); theHTML.Append("</td><td width='40%'>"); theHTML.Append(rslt.ask); theHTML.Append("</td></tr>");

where customer.Attribute("FirstName").Value == "Douglas"

Listing 15-1 shows a project file generated by QMake. As you can see, files ending with cpp, h, and ui have been recognized. QMake recognizes most file endings used in Qt-based software projects, but these three were the only file extensions available in this project.

The select clause is trivial we just want the query to return all matching elements. Finally, we execute the query using the standard LINQ SingleOrDefault operator, which, as you may recall, returns the one result of the query, unless it failed to match anything, in which case it will return null. (And if there are multiple matches, it throws an exception.) We therefore test the result against null before attempting to use it:

if (oneCustomer != null) { Console.WriteLine(oneCustomer); } else { Console.WriteLine("Not found"); }