qr code generator for c# Introducing the application definition file in C#.NET

Creation QR Code in C#.NET Introducing the application definition file

Introducing the application definition file
QR Drawer In Visual C#
Using Barcode generation for .NET Control to generate, create QR Code JIS X 0510 image in .NET applications.
www.OnBarcode.com
Scanning QR-Code In Visual C#
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
The IdEnumerator method is only ever used for the crawling process of MOSS Search. When you set a crawl, MOSS will first execute the IdEnumerator method. It s a simple method that returns a list of identifier values that MOSS should crawl. The crawler will then call the SpecificFinder method for each identifier value returned, passing this identifier in as the necessary parameter to uniquely identify the record. As the SpecificFinder is used in this manner, any field that you want your users to be able to search should be returned in the SpecificFinder method. We ll initially study the Finder method, as this is generally the most complex of the three. Currently within our entity, we have the code shown in listing 2.6.
Generate USS-128 In C#.NET
Using Barcode generator for .NET Control to generate, create GS1-128 image in Visual Studio .NET applications.
www.OnBarcode.com
Draw PDF-417 2d Barcode In C#.NET
Using Barcode generation for Visual Studio .NET Control to generate, create PDF417 image in .NET framework applications.
www.OnBarcode.com
Listing 2.6 Code to create an entity with a number of methods
GS1 - 13 Generator In C#
Using Barcode generator for VS .NET Control to generate, create GS1 - 13 image in .NET applications.
www.OnBarcode.com
Generate Code 128 Code Set A In C#.NET
Using Barcode encoder for VS .NET Control to generate, create Code 128C image in .NET applications.
www.OnBarcode.com
<Entity EstimatedInstanceCount="10000" Name="Product"> // properties // identifiers Unique Finder <Methods> method name <Method Name="GetProducts"> // // // // Properties FilterDescriptors Parameters MethodInstances
Barcode Maker In Visual C#
Using Barcode encoder for .NET Control to generate, create Barcode image in Visual Studio .NET applications.
www.OnBarcode.com
Generate Bookland EAN In Visual C#.NET
Using Barcode creation for .NET framework Control to generate, create ISBN - 10 image in .NET applications.
www.OnBarcode.com
</Method> </ Methods> </Entity>
QR Code ISO/IEC18004 Scanner In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Create Denso QR Bar Code In Java
Using Barcode drawer for Android Control to generate, create Quick Response Code image in Android applications.
www.OnBarcode.com
First, our method needs a unique name. A meaningful name that explains the functionality is always a good idea. Within our method, we ve labeled the different elements that can make up our method: properties, filter descriptors, parameters, and method instances. Listing 2.7 deals with properties.
2D Barcode Generator In VB.NET
Using Barcode creation for Visual Studio .NET Control to generate, create Matrix 2D Barcode image in VS .NET applications.
www.OnBarcode.com
PDF 417 Maker In Visual Studio .NET
Using Barcode creation for Visual Studio .NET Control to generate, create PDF417 image in VS .NET applications.
www.OnBarcode.com
Listing 2.7 How to create properties in your application definition file
QR Code ISO/IEC18004 Encoder In Objective-C
Using Barcode printer for iPad Control to generate, create Denso QR Bar Code image in iPad applications.
www.OnBarcode.com
Generating UCC - 12 In Objective-C
Using Barcode printer for iPad Control to generate, create UPC A image in iPad applications.
www.OnBarcode.com
<Property Name="RdbCommandText" Type="System.String"> SELECT ProductID, Name, ProductNumber, ListPrice FROM Product WHERE (ProductID = @ProductId) AND (Name LIKE @Name) AND (ProductNumber LIKE @ProductNumber) For databases, can be </Property> Text, StoredProcedure, <Property Name="RdbCommandType" or TableDirect Type="System.Data.CommandType">Text</Property> </Properties>
Make EAN 128 In VS .NET
Using Barcode drawer for VS .NET Control to generate, create GS1 128 image in .NET framework applications.
www.OnBarcode.com
Decode Barcode In VS .NET
Using Barcode recognizer for Visual Studio .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
<Properties>
DataMatrix Creator In None
Using Barcode maker for Excel Control to generate, create Data Matrix image in Office Excel applications.
www.OnBarcode.com
Printing Code 128 Code Set C In VB.NET
Using Barcode creator for .NET framework Control to generate, create Code 128 Code Set A image in Visual Studio .NET applications.
www.OnBarcode.com
Understanding the application definition file
Barcode Creation In Java
Using Barcode creator for Java Control to generate, create Barcode image in Java applications.
www.OnBarcode.com
Data Matrix ECC200 Encoder In Java
Using Barcode drawer for Java Control to generate, create ECC200 image in Java applications.
www.OnBarcode.com
As we ve seen already within our application definition file, properties are used to add values to particular objects within our file. A method for a database needs two properties: RdbCommandText and RdbCommandType. RdbCommandType can have the possible values of Text, StoredProcedure, or TableDirect. RdbCommandText will have the value associated with the RdbCommandType for example, a stored procedure name, some SQL select statement, or the name of the table. You ll notice that, in our example, our SQL select statement has a number of parameters added in the where clause. These parameters need to be defined in the Parameters section, but if you want your users to have use of these parameters as filters, they also need to be described as filter descriptors.
Filter descriptors
The BDC Data List Web Part and the entity data picker used with the Business Data column will execute whatever SQL statement or stored procedure is defined in the finder method s Properties section. This select statement could in theory return thousands of rows, which isn t generally good for users or the back-end data source or infrastructure. Allowing users to filter the data that they can view would be a better, more usable solution. To do this, a method generally needs three things for each column that you want to be able to filter: a FilterDescriptor, a Parameter, and also the SQL statement or stored procedure to make use of the parameter/filter, as shown in listing 2.8.
Listing 2.8 How to create a filter descriptor
<FilterDescriptors> <FilterDescriptor Type="Comparison" Name="ProductId" /> <FilterDescriptor Type="Wildcard" Name="Name"> <FilterDescriptor Type="Wildcard" Name="ProductNumber" /> </FilterDescriptors>
You can see from our earlier SQL select statement that we have a FilterDescriptor defined for each part that makes up our where clause. The type of filter has a lot to do with how the user interface looks. If you choose the type to be Comparison, you re presented with the filter options in the Business Data Web Parts and the item picker control. In figure 2.2, you can see how the filters are used by the information workers. Figure 2.2 The use of the filter descriptor in a If you choose Wildcard, you re pre- Data List Web Part sented with a screen like the one shown in figure 2.3.
Introducing the application definition file
You may think that choosing Wildcard for all string filters would make sense, but there seems to be a problem with using a wildcard filter and the general wildcard character. If you have your filter set to Contains and you enter the filter Figure 2.3 The effect of using a value to be %, you d expect it to return all the wildcard filter in your application data. This isn t the case, and you ll find that no definition file data is visible. If you do want this type of functionality, you should choose Comparison as the type of filter. With this filter for a string column, you ll find that the wildcard symbol will work as expected, with the small caveat still that % won t return all data.
Copyright © OnBarcode.com . All rights reserved.