The CREATE INDEX Syntax in C#.net

Integration data matrix barcodes in C#.net The CREATE INDEX Syntax

Now that you have the basic machinery to easily parse, simplify, and differentiate expressions, you can start looking into how to visualize them to really enjoy the benefits of the application. The rendering engine (placed in VisualExpr.fs) has two main parts: converting expressions to VisualExpr values and then rendering them directly. Ideally, you should hide the representation of the VisualExpr (and its related VisualElement) type with a signature (not shown here) so that it isn t possible to construct these values directly. Before you get to the conversion and rendering functions, you need to do a bit of setup. To control how the different parts of an expression are rendered on the screen, you introduce the RenderOptions type containing the fonts and pen (which determines the color used to draw) that are applied during rendering. Listing 12-8 shows the code that defines the rendering options used in the remainder of this example. Listing 12-8. VisualExpr.fs: Rendering Options for the Visual Symbolic Differentiation Application namespace Symbolic.Expressions.Visual open Symbolic.Expressions open System.Drawing open System.Drawing.Imaging type RenderOptions = { NormalFont: Font; SmallFont: Font; IsSuper: bool; Pen: Pen; } static member Default = { NormalFont = new Font("Courier New",18.0f,FontStyle.Regular); SmallFont = new Font("Courier New", 12.0f, FontStyle.Regular); IsSuper = false; Pen = new Pen(Color.Black, 1.0f); } member self.Brush = (new SolidBrush(Color.FromArgb(255, self.Pen.Color)) :> Brush) Each algebraic expression is converted to a VisualExpr value as part of the rendering process. This ensures that you don t have to deal with the variety of expression forms but only with a small set of simple shapes that can be rendered according to a few simple rules. These simpler building blocks are defined in the VisualElement type and shown in Listing 12-9. For instance, there are no sums or products; these and similar expressions are broken down into sequences of symbols (such as 1, x, and +). The two other visual elements are exponentiation and fractions, which are used to guide the display logic later during the rendering phase. Each visual element carries a size value that is calculated using a given set of rendering options.

available to you to save the underlying T-SQL to a file, to the clipboard, or to the Query window. The first two options are very useful as methods of storing actions you re creating to keep in your source code repository, such as Visual SourceSafe. The third option is ideal if you wish to add more options to your database than you have defined within the wizard set up. All of the options enable you to see the underlying code and understand what is required to create a database. We ll look at the code in a moment.

The GetProducts() web method is designed to return a list of products from the Products table. The method is shown in Listing B-3. Listing B-3. The GetProducts() Method [WebMethod] public DataSet GetProducts() { DataSet ds = SqlHelper.GetDataSet("SELECT * FROM products",null); return ds; } The GetProducts() web method simply selects all the products from the Products table by using the GetDataSet() method of the SqlHelper class and returns the DataSet to the caller. This method can be used to create a product catalog in the client application.

Then, in the Button3_Click method, you executed the stored procedure using the ExecuteNonQuery method within a Try block:

I had a bit of a problem deciding how to line up the figures from the hash_area_size tests with those from the pga_aggregate_target tests. According to the manuals, any individual workarea is limited to 5% of the pga_aggregate_target, so obviously a pga_aggregate_target of 100MB should be compared with a hash_area_size of 5MB. On the other hand, when I set the pga_aggregate_target to 100MB, the 10053 trace reported the hash area (max=) at 10MB, not 5MB. So in the end I decided to line the two sets of figures up on the formula hash_area_size = 0.1 * pga_aggregate_target on the basis that this was probably the value that the optimizer was using for most of its calculations. On top of this, there was another little problem: the minimum legal value for pga_aggregate_target is 10MB which corresponds to 1MB for the hash_area_size calculations by my formula; however, the legal minimum for the hash_area_size is 32KB (although this is ignored and the effective minimum seems to be 64KB). So my sets of figures don t start at the same place. Finally, rather than reporting the actual cost of the query, I have subtracted the cost of the two tablescans from the total cost, to give you the cost of the join itself. Table 12-3 lists the costs of the baseline query for different feature sets at equivalent levels of memory for the hash table and yes, they are the right headings; the figures with CPU costing enabled really do come out lower than the figures without.

Before we start discussing in detail how to use Team Build, we will first describe how Team Build fits into the big picture of VSTS, and we will provide you with a look at the architecture behind Team Foundation Build. As mentioned earlier, Team Build is part of Team Foundation Build (see Figure 5-1).

6. HTTP will POST the data back to the web server, and the web server processes that data. 7. HTTP sends the response to the web browser. 8. The web browser processes the response and displays the result on the web page. Now that you have a general understanding of the communication process, let s have a closer look at each of the key components.

CFService.getQuery("1");

This is a very common error, so my advice is: don t panic. The only mistake here is that the ReportViewer is unable to find the report, as you can see in the following code line: reportViewer1.LocalReport.ReportEmbeddedResource = "ProductReorder.rptProductReorder.rdlc"; We need to make sure that our report has a fully qualified project name. In our example, it is qualified with the name ProductOrder. At times, just a simple typo can lead you to this situation. Please see Figure 4-62 for an example of this error.

Let s start the journey with a quick tutorial on Windows Forms. I know you might be thinking, This book is about client-side reporting; why do I need to know Windows Forms Well, since we re going to host our reports with Windows Forms, it is important for you to know the minimum requirements to host your reports and present them to the user. All right folks, the moment has arrived; let s roll up our sleeves to do some serious keyboarding and dragging and dropping. If you re comfortable with creating a Windows Forms project and know how to add the ReportViewer to a project, you may jump directly to the first project. Please make sure you ve properly installed Microsoft Visual Studio 2005 on your computer before you continue to the next section. If you are new to the Visual Studio IDE, I have created a brief introduction for you in Appendix A; please read it before moving forward.