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In this chapter, you learned some of the important language constructs of C++/CLI. Of course, there are other significant features, and there is much more to say about each feature. You had a quick look at primitive types, various aggregate types, managed arrays, properties, delegates, events, and parameterized types. Later chapters will return to each of these aspects of the language in more detail. Before doing that, though, let s look at compiling and building C++/CLI programs.
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Now run Default.aspx and click all three links, one by one. You will notice that instead of displaying the default error page, this time ASP.NET displays the custom error pages as specified in web.config. Figure 11-37 shows one sample run of the website.
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The address field is the most complex field in a Contact, as it combines both the array elements we saw in the name field and the attributes found in telephone numbers. Now that you have mastered both of these concepts, addresses should be relatively straightforward. First you will build up an array of address elements, and then assign that array to a specific address attribute. The address array elements are shown in table 6-3.
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CHAPTER 12: Securing a Wireless Network
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WordPress allows you to generate permalinks (permanent URIs) on your blog, which appear as though each of your posts is an individual static page on your site, rather than the dynamic output of a database-driven web site. Instead of a URI to one of your stories looking like http:// example.com/ p=29, WordPress can use something like this link: http://example.com/card-games/how-to-win-at-poker/ Because this type of URI is already loaded with your keywords, it has an immediate advantage over the p=29 version. It also is more readable to your human visitors. It s easier for them to remember the link or to read it out over the phone. To configure the structure of your permalink, from the administration pages, click Options, then Permalinks. The Edit Permalink Structure page allows you to configure the structure of your permalink URIs, as shown in Figure 15-25.
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1,000,000 1,000,000 1,000,000 622,025 1,007,560 767,036 538,364 286,825 1,000,000 (10,615) 1,000,000
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In the preceding section, you learned the connected way of working by using ADO.NET and XmlReader. However, for building scalable applications, connected data access poses problems of its own. In such circumstances, disconnected data access is strongly preferred. In fact, disconnected data access is the core feature of ADO.NET. Two classes DataSet and SqlDataAdapter together provide a way to work with database data in disconnected mode. The DataSet object is a totally disconnected one and can even be created manually. The SqlDataAdapter class fills the DataSet with data from a database and later propagates the changes made to the DataSet back to the database. In the next sections, you will learn the architecture of DataSet and DataAdapter, and how to work with them.
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Figure 2-13. The Output window The Build view provides information about errors, warnings, successes, and failures for each project and/or file that you selected during the last compilation. The Debug view shows much lower-level information about the last compilation. In this view you can see what files the runtime has loaded to complete the compilation. The Refactor view shows information about any code refactoring you have done recently. For example, in the earlier example when you renamed Button1 to MyButton, an entry was shown on the Refactor view in the Output window.
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If you fail to unmount the device, Ubuntu will still believe the device is attached. This shouldn t cause too many problems, but it could crash any programs that were accessing the device. It might also mean the card isn t recognized properly when you reinsert it. In rare instances, data loss can occur.
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Portlet Application Deployment Descriptor Structure
The GridView is a large control with a wealth of functionality, and in the previous section, you barely scratched the surface of what you can do with it. If you just want to return a list of data and codelessly control how that list appears, you can achieve this with the DataList control. This control is a server control, found on the Data tab of your Toolbox.
E (-E) switch, SQLCmd tool, 62 Edit menu, 22 EditorZone component, 191 EM see Express Manager (EM) tool EmailWebSite building first web application, 10 enabled attribute profile element, 203 enablePasswordReset attribute, 248 enablePasswordRetrieval attribute, 248 encapsulation, OOP, 7 End User License Agreement installing VWD, 3 en-gb language, 170 entities, 51 en-us language, 170 Environment node environment options, VWD, 42 Error List window, 35 Eval method data binding controls, 131 events SiteMapResolve event, 163 execution advantages of stored procedures, 74 explicit localization, websites, 175 explicit localization for a control, 178 180 Express Manager (EM) tool, 48, 56 installing, 56 61 toolbar buttons, 59
private void btnUpDir_Click(object sender, RoutedEventArgs e) { if (currentDir != "") { currentDir = System.IO.Path.GetDirectoryName(currentDir); } GetStorageData(); } 12. When the user clicks the Open Directory button, you will combine the current directory with the selected directory from the directory ListBox using the System.IO.Path.Combine() method, set the current directory to that new directory, and once again reexecute the GetStorageData() method. private void btnOpenDir_Click(object sender, RoutedEventArgs e) { if (this.lstDirectoryListing.SelectedItem != null) { currentDir = System.IO.Path.Combine( currentDir, this.lstDirectoryListing.SelectedItem.ToString()); } GetStorageData(); } 13. Next, implement the Show File button s Click event, as follows: private void btnOpenFile_Click(object sender, RoutedEventArgs e) { if (this.lstFileListing.SelectedItem != null) { this.txtFileName.Text = this.lstFileListing.SelectedItem.ToString(); using (var store = IsolatedStorageFile.GetUserStoreForApplication()) { string filePath = System.IO.Path.Combine( currentDir, this.lstFileListing.SelectedItem.ToString()); IsolatedStorageFileStream stream = store.OpenFile(filePath, FileMode.Open); StreamReader sr = new StreamReader(stream);
You add an INSERT statement and change the name of the original query string variable from sql to ins in order to clearly distinguish it from this statement: 'SQL to insert employees Dim ins As String = "insert into employees " & _ "(firstname,lastname,titleofcourtesy,city,country)" & _ "values(@firstname,@lastname,@titleofcourtesy,@city,@country)" You replace the update comment in the try block with quite a bit of code. Let s look at it piece by piece. Creating a command is nothing new, but notice that you use the insert SQL variable (ins), not the query one (sql): ' insert employees ' ' create command Dim cmd As New SqlCommand(ins, conn) Then you configure the command parameters. The five columns for which you ll provide values are each mapped to a named command parameter. You don t supply the primary key value since it s generated by SQL Server, and the other columns are nullable, so you don t have to provide values for them. Note that all the values are current values, so you don t have to specify the SourceVersion property. ' map parameters cmd.Parameters.Add("@firstname", _ SqlDbType.NVarChar, 10, "firstname") cmd.Parameters.Add("@lastname", _ SqlDbType.NVarChar, 20, "lastname") cmd.Parameters.Add("@titleofcourtesy", _ SqlDbType.NVarChar, 25, "titleofcourtesy") cmd.Parameters.Add("@city", _ SqlDbType.NVarChar, 15, "city") cmd.Parameters.Add("@country", _ SqlDbType.NVarChar, 15, "country") Finally, you set the data adapter s InsertCommand property with the command to insert into the Employees table so it will be the SQL the data adapter executes when you call its Update method. You then call Update on the data adapter to propagate the change to the database. Here you add only one row, but since the SQL is parameterized, the data adapter will look for all new rows in the employees data table and submit inserts for all of them to the database: ' insert employees da.InsertCommand = cmd da.Update(ds, "employees") Figure 13-8 shows the new row, and if you check with Database Explorer or SSMSE, you ll see the row has been propagated to the database. Roy Beatty is now in the Employees table.
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