crystal reports data matrix barcode

crystal reports data matrix native barcode generator

crystal reports barcode 128, crystal report barcode ean 13, generating labels with barcode in c# using crystal reports, crystal reports barcode not working, crystal reports upc-a barcode, crystal reports data matrix, crystal reports barcode font encoder ufl, free code 128 barcode font for crystal reports, crystal reports barcode not working, crystal reports data matrix native barcode generator, crystal reports pdf 417, crystal reports ean 128, crystal report barcode formula, crystal reports pdf 417, crystal reports barcode 39 free

download pdf file from database in asp.net c#,generate pdf in mvc using itextsharp,how to open pdf file in new tab in asp.net using c#

ASP .NET isn t restricted to returning HTML content. In fact, you can use the Response.BinaryWrite() method to return raw bytes and completely bypass the web-page model. The following page uses this technique with the pub_info table in the pubs database (another standard database that s included with SQL Server). It retrieves the logo field, which contains binary image data. The page then writes this data directly to the page, as shown here: Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Dim connectionString As String = WebConfigurationManager.ConnectionStrings("Pubs").ConnectionString Dim con As New SqlConnection(connectionString) Dim SQL As String = "SELECT logo FROM pub_info WHERE pub_id='1389'" Dim cmd As New SqlCommand(SQL, con) Try con.Open() Dim r As SqlDataReader = cmd.ExecuteReader() If r.Read() Then Dim bytes As Byte() = CType(r("logo"), Byte()) Response.BinaryWrite(bytes) End If r.Close() Finally con.Close() End Try End Sub Figure 10-22 shows the result. It doesn t appear terribly impressive (the logo data isn t that remarkable), but you could easily use the same technique with your own database, which can include much richer and larger images.

Now that we have these extension methods, look at how all objects (which of course means everything in the .NET base class libraries) have a new method named DisplayDefiningAssembly(), while System.Int32 types (and only integers) have methods named ReverseDigits() and Foo(): static void Main(string[] args) { Console.WriteLine("***** Fun with Extension Methods *****\n"); // The int has assumed a new identity! int myInt = 12345678; myInt.DisplayDefiningAssembly(); // So has the DataSet! System.Data.DataSet d = new System.Data.DataSet(); d.DisplayDefiningAssembly(); // And the SoundPlayer! System.Media.SoundPlayer sp = new System.Media.SoundPlayer(); sp.DisplayDefiningAssembly(); // Use new integer functionality. Console.WriteLine("Value of myInt: {0}", myInt); Console.WriteLine("Reversed digits of myInt: {0}", myInt.ReverseDigits()); myInt.Foo(); myInt.Foo("Ints that Foo Who would have thought it!"); bool b2 = true; // Error! Booleans don't have the Foo() method! // b2.Foo(); Console.ReadLine(); } Here is the output. ***** Fun with Extension Methods ***** Int32 lives here: => mscorlib DataSet lives here: => System.Data SoundPlayer lives here: => System Value of Reversed 12345678 12345678 myInt: digits called called 12345678 of myInt: 87654321 the Foo() method. Foo() and told me: Ints that Foo

c# code 39 reader,rdlc gs1 128,how to open pdf file in c# windows application,.net pdf 417,barcode reader in asp.net c#,.net data matrix barcode generator

When you use BinaryWrite(), you are stepping away from the web-page model. If you add other controls to your web page, they won t appear. Similarly, Response.Write() won t have any effect, because you are no longer creating an HTML page. Instead, you re retuning image data. You ll see how to solve this problem and optimize this approach in the following sections.

Who would have thought it!

Binary data can easily grow to large sizes However, if you re dealing with a large image file, the example shown previously will demonstrate woefully poor performance The problem is that it uses the DataReader, which loads a single record into memory at a time This is better than the DataSet (which loads the entire result set into memory at once), but it still isn t ideal if the field size is large There s no good reason to load an entire 2 MB picture into memory at once A much better idea would be to read it piece by piece and then write each chunk to the output stream using ResponseBinaryWrite() Fortunately, the DataReader has a sequential access feature that supports this design To use sequential access, you simply need to supply the CommandBehaviorSequentialAccess value to the CommandExecuteReader() method.

Recall that the first parameter of an extension method is marked with the this keyword, followed by the type of item the method is applicable to. If you peek at what is happening behind the scenes (as verified by a tool such as ildasm.exe), you will find that the compiler simply calls the normal static method, passing in the variable calling the method as a parameter (e.g., it is the value of this). Consider the following C# code, which approximates the code substitution that took place: private static void Main(string[] args) { Console.WriteLine("***** Fun with Extension Methods *****\n"); int myInt = 12345678; MyExtensions.DisplayDefiningAssembly(myInt); System.Data.DataSet d = new DataSet(); MyExtensions.DisplayDefiningAssembly(d); System.Media.SoundPlayer sp = new SoundPlayer(); MyExtensions.DisplayDefiningAssembly(sp); Console.WriteLine("Value of myInt: {0}", myInt); Console.WriteLine("Reversed digits of myInt: {0}", MyExtensions.ReverseDigits(myInt)); TesterUtilClass.Foo(myInt); TesterUtilClass.Foo(myInt, "Ints that Foo Console.ReadLine(); } Given that calling an extension method from an object (thereby making it seem that the method is in fact an instance-level method) is just some smoke-and-mirrors effect provided by the compiler, you are always free to call extension methods as normal static methods using the expected C# syntax (as just shown). Who would have thought it!");

birt upc-a,eclipse birt qr code,c# ocr free,c# .net core barcode generator