A Programmer's Guide to ADO .NET in C# by Mahesh Chand

By Mahesh Chand

A Programmer's consultant to ADO.NET in C# starts off through taking readers via a fast moving assessment of C# after which delves into ADO.NET. Why should still C# programmers use it rather than the present applied sciences? What new performance does it supply? The chapters that stick to plow through the main points on all of the significant info services of the .NET platform (OleDb, SQL Server, and ODBC) that aid you learn and write facts to the unique database. those chapters additionally function an outstanding reference for taking a look up unique equipment and houses for those info supplier sessions. Authors Chand and Gold additionally convey C# programmers tips on how to paintings with XML sessions and the way to combine XML into the ADO.NET architecture.
The ebook offers programmers with convenient principles approximately making the most of the VS.NET IDE and the way you could tie your info to the myriad of robust controls together with the multi-faceted information Grid. ultimately, it is going via making a visitor publication program for the net so that you can see how every little thing healthy jointly.

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Listing 1-21. Variable access modifiers using System; class VarAccess { . ToString()); } } When you access class members, the num2 variable is not available in the list of its members. See Figure 1-6. NET ~ r<1SON Ubrary I void Main() { AccessCIs cIs = new AccessCIs(); 1n~ num! = 98; Dum1 = cls . :l X Console. ::::J Suinq () ) ; GetHashCode ' >'. _:E~{]J~ ~r .. "'. GetType run! ,..... ToS"""'" Build succeeded " "... ~ I ) Con ... ~' _... 4,: Ch15 ~ r,... J j 2- INS ::::. ~ Figure 1-6. Available members of AccessCls If you try to access num2 from the main program, the compiler gives the error shown in Figure 1-7.

Figure 1-3. Output of Listing 1-6 13 Chapter 1 The Equals and ReferenceEqual Methods The Equals method in the Object class can compare two objects. The ReferenceEqual method can compare the two objects' instances. Equals(strl, str2»; See Listing 1-7 for the entire code. Listing 1-7. WriteLine("==========================="); Console. Equals(strl, str2)); } } Figure 1-4 shows the output of Listing 1-7. Class1 • II ypeSsamp ~----------------------~ ------~-----------~------ ~ ---- omparison of Two Obje ts alse I l~ue rress any key to continue Ii a Figure 1-4.

Streams to the System console. It also defines functionality for error streams. The Read operation reads data from the console to the standard input stream, and the Write operation writes data to the standard output stream. The standard error stream is responsible for storing error data. These streams are automatically associated with the system console. The error, in, and out properties of the Console class represent standard error output, standard input, and standard output streams. In the standard output stream, the Read method reads the next character, and the ReadLine method reads the next line.

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