ASP.NET Web PDF Document Viewer/Editor Control Library

ds.Tables[2].Select( string.Format("id = '{0}'", eventArgument))[0]; result += dr["Address"].ToString() + "<BR>"; result += dr["Phone"].ToString() + "<BR>"; } catch { result = "Address not found."; } return result; } The argument is what your client-side function that launched the callback passed. Because of how you built your expression, this is the ID of the current selection in list B. You will use this ID to look up the address information for the corresponding pool hall, build that into an HTML string, and send it back to the client. When this string is returned to the client, the DisplayAddress function will be invoked. Here s the code for that function. Note that this is client-side JavaScript. function DisplayAddress(address, context) { document.all.dAddress.innerHTML = address; } Address is the string you built on the server, and context is the literal string context that gets passed to the callback method, but not to the server. Again, it s designed to be used to track where the callback originated on the client. dAddress is a div element at the bottom of the page: <div id=dAddress style="font-family:Verdana;color:Navy;"></div> Now you only have to tie up loose ends. The address will be displayed when the user makes a selection out of list B, but this list has a default selection when the page first renders. You ll modify the page load script to populate it then: this.ClientScript.RegisterStartupScript (this.GetType(), "PopList", "populateListB();GetAddress();", true); List B also gets a default selection when a choice is made from list A. You ll make a similar change there: <asp:DropDownList Runat=server ID=ddlListA onchange='populateListB();GetAddress();'

free excel ean barcode font, barcode add in for excel 2013, print barcode in excel 2010, download free barcode generator excel, excel barcode font 2016, barcode font for excel 2010, free barcode generator plugin for excel, barcode in excel 2003 erstellen, barcode fonts for excel 2007, barcode font excel 2007 download,

In our example, this would result in the following select being issued to lock Martin s record: blake@ORA10G> select empno, ename, sal from emp where empno=7654 and ename='MARTIN' and sal=1350 for update nowait; EMPNO ENAME SAL ---------- ---------- ---------7654 MARTIN 1350 The following three scenarios are possible at the point Blake tries to lock the row as shown earlier: If Blake s session was able to lock the record, then Blake can proceed to update it safely without worrying about it being overwritten by some other transaction If some other session was able to lock the record before Blake, Blake would get a resource busy exception as a result of the previous select indicating that the record is locked, and he needs to try his luck later.

The F# library includes a namespace Microsoft.FSharp.Math that defines a number of mathematical-related constructs including matrix and vector types, double-precision complex numbers (type Complex, abbreviated complex), arbitrary-precision integers (type BigInt, abbreviated bigint), and arbitrary-precision rationals (type BigNum, abbreviated bignum). Over time it is expected that F# will include further functionality in this namespace.

In the previous example, Blake has already locked the record, and it is Adam who gets an exception when he tries to lock the same row: adam@ORA10G> select empno, ename, sal from emp where empno=7654 and ename='MARTIN' and sal=1350 for update nowait; select empno, ename, sal from emp where empno=7654 and ename='MARTIN' and sal=1350 for update nowait * ERROR at line 1: ORA-00054: resource busy and acquire with NOWAIT specified If between the time Blake looked at the record and signaled his intention to update a record, someone else already changed the underlying data on the screen and committed the changes (thus releasing the lock), then Blake would get zero rows returned by the previous select This is because Blake included all the columns that could be changed in the where clause of the select that locks the row.

F# includes matrix and column vector types, which are generic and called Matrix<'a> and Vector<'a>, respectively. For symmetry a type of row vectors, RowVector<'a>, is also included. Most commonly, the element types are instantiated to be double (that is, float), so the following abbreviations are used: type vector = Vector<float> type matrix = Matrix<float> type rowvec = RowVector<float> The modules Matrix, Vector, and RowVector in the Microsoft.FSharp.Math namespace have many further functions for creating and working with these types. The functions are specialized for use with floating-point matrices, but versions to work with generic types are available at Microsoft.FSharp.Math.Matrix.Generic and Microsoft.FSharp.Math.Vector. Generic. The functions vector and matrix are also available for creating literal values. Here are some examples of the uses of these types and functions: > open Microsoft.Fsharp.Math;; > vector [ 1.0; 2.0 ; 3.0 ] + vector [ 1.0; 2.0 ; 3.0 ];; val it : Vector<float> = vector [2.0; 4.0; 6.0] > matrix [ [ 1.0; 2.0 ]; [ 1.0; 3.0 ] ] * matrix [ [ 1.0; -2.0 ]; [ 0.5; 3.0 ] ];; val it : Math.matrix = matrix [[1.0; -4.0]; [0.5; 9.0];] Table 10-11 summarizes the primary properties of these types.

When you ve chosen more than a single process to use to host your software, you have to decide how you ll communicate between them Marshaling information between processes takes on many forms and can traverse many boundary types One thing is constant, and that is that marshaling is expensive There will always be a performance hit on your application, whether you re moving pieces of a system into different physical tiers or across processes on the same physical tier Marshaling can occur across application domains within a process, across processes on the same machine, across machines within a LAN, or across machines distributed on the Internet Different types of communication work best for different scenarios Performance is not always the most important consideration when you re deciding how to communicate between processes.