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Visual Studio creates a new web application on your local IIS server. If you are connecting to a remote server, the remote server must have .NET Framework 4, ASP.NET, and Front Page Server Extensions installed and enabled. Microsoft does not support Front Page Server Extensions on IIS 7.5 and Windows Server 2008 R2, however. Therefore, you cannot create a new website that uses the HTTP deployment capabilities of Visual Studio on the most recent Microsoft server operating systems. If you receive the error message shown in Figure 1-5, create the website by using the file system or FTP.

Sample of Visual Basic Code ' Check if ViewState object exists, and display it if it does If (Me.ViewState("lastVisit") IsNot Nothing) Then Dim lastVisit As DateTime = CType(Me.ViewState("lastVisit"), DateTime) Label1.Text = lastVisit.ToString() Else Label1.Text = "lastVisit ViewState not defined!" End If ' Define the ViewState object for the next page view Me.ViewState("lastVisit") = DateTime.Now Sample of C# Code // Check if ViewState object exists, and display it if it does if (ViewState["lastVisit"] != null) Label1.Text = ((DateTime)ViewState["lastVisit"]).ToString(); else Label1.Text = "lastVisit ViewState not defined."; // Define the ViewState object for the next page view ViewState["lastVisit"] = DateTime.Now;

T-SQL supports two different syntaxes for joins. There's a lot of confusion surrounding the two. When do you use each Which performs better Which is standard and which is proprietary Is the older syntax going to be deprecated soon And so on. Hopefully, this chapter will clear the fog. I'll start by saying there are two different syntaxes for joins supported by the ANSI standard, and neither is in a process of deprecation yet. The join elements of the older standard are a complete part of the newer. This means that you can use either one without worrying that it will not be supported by Microsoft SQL Server sometime soon. SQL Server will not remove support for implemented features that were not deprecated by the standard. The older of the two syntaxes was introduced in ANSI SQL:1989. What distinguishes it from the newer one is the use of commas to separate table names that appear in the FROM clause, and the absence of the JOIN keyword and the ON clause: FROM T1, T2 WHERE where_filter

The Recycle Bin provides protection against accidental erasure of files. In most cases, when you delete one or more files or folders, the deleted items go to the Recycle Bin, not into the ether. If you change your mind, you can go to the bin and recover the thrownout items. Eventually, when the bin fills up, Windows begins emptying it, permanently deleting the files that have been there the longest. The following kinds of deletions do not go to the Recycle Bin:

This time the procedure identified that it was invoked from an outer transaction, and upon error rolled back only its own activity (to the savepoint) . To demonstrate a failed transaction, set XACT_ABORT ON and try again:

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[AttributeUsage(AttributeTargets.Class, Inherited = false)] [Serializable] public sealed class AttributeUsageAttribute : Attribute { internal AttributeTargets m_attributeTarget = AttributeTargets.All; internal Boolean m_allowMultiple = false; internal Boolean m_inherited = true; public AttributeUsageAttribute(AttributeTargets validOn) { m_attributeTarget = validOn; } public AttributeTargets ValidOn {

The context node-set numbers in Table 6-1 refer to the XML tree in Figure 6-1 and indicate the nodes that would form the corresponding node-set once a given axis is specified. The context node is labeled 7. 203

maxAllowedContentLength is the maximum content length, in bytes, that can be requested. This prevents the possibility that a request could produce so much output that it overwhelms either your server or a client s computer. Defaults to 30000000. maxURL is the maximum size URL in bytes that will be passed to the application. This prevents buffer overruns in IIS or its hosted applications by a client that sends a maliciously long URL. Defaults to 4096. maxQueryString is the maximum size in bytes of a query string, the portion of a URL beyond the character. Defaults to 2048. headerLimits is a collection whose elements have two attributes: header and sizeLimit.header is the name of the HTTP request header being limited, and sizeLimit is the maximum number of bytes that can be supplied as the value for that header.

internal sealed class SimpleType : IDisposable { public void Dispose() { Console.WriteLine("public Dispose"); } void IDisposable.Dispose() { Console.WriteLine("IDisposable Dispose"); } }

using System; // Tell compiler to check for CLS compliance [assembly:CLSCompliant(true)] // Errors appear because the class is public public class App { // Error: Return type of App.Abc() is not CLS compliant public UInt32 Abc() { return 0; }

ALTER QUEUE [dbo].[InventoryQueue] WITH ACTIVATION ( DROP )