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ASP.NET PDF Viewer using C#, VB/NETWith partial classes, you have a new approach to building Web Forms that involves a partial class inheriting from the Page base class. One file for the partial class is the code you d normally add to the code-behind. The other file for the partial class isn t created until a run-time compilation step occurs. This is where all of the code that the designer would normally generate during development gets added to the mix. Let s take a look at an example of a page in version 1.x and the changes required to use it in version 2.0. Consider the following markup: <%@ Page language="c#" Codebehind="WebForm1.aspx.cs" Inherits="WebDemo.WebForm1" %> <HTML> <HEAD> <title>WebForm1</title> </HEAD> <body> <form id="Form1" method="post" runat="server"> <asp:Label id="Label3" runat="server">User Name</asp:Label><br> <asp:TextBox id="TextBox1" runat="server" /><br> <asp:Label id="Label2" runat="server">Password</asp:Label><br> barcode fonts for excel 2010, how to make barcodes from a list of numbers in excel 2010, free barcode generator for excel 2007, barcode font excel 2007 free download, barcode add in for excel 2007, excel formula barcode check digit, microsoft excel 2010 barcode add in, active barcode excel 2013 download, free barcode addin for excel 2010, barcode font for excel download,benchmark@ORA10G> select empno, ename 2 from my_emp_et 3 where empno <= 3; EMPNO ---------1 2 3 ENAME -------------------Varun Menon Chaandni Sneha John Edgar If so, you append the appropriate escape sequence to the string already accumulated and advance the current position. Upon encountering the closing character, you return the overall string. An imperative System.Text.StringBuffer object could also have been used to accumulate the string, which is more efficient if strings get very long. You can thus use this facility to do the following, among other things: Do a one-time load from files into databases using the insert into select * from <external table> syntax. This is the most common usage of external tables. Get the contents of a text file on the database server in your JDBC layer by using a simple select statement. Of course, all the amazing flexibility that comes along with the select statement is available for you to use. Treat a structured file as a table with individual columns (as we did previously) and run selects on them to get data, which can be filtered or transformed on its way to JDBC. If the file is not structured (it uses a free format) then, in most cases, you could use the new line as a separator to read the data in JDBC using simple selects. <asp:TextBox id="TextBox3" runat="server" /><br><br> <asp:Button id="Button1" runat="server" Text="Login" /><br> <asp:Label id="lblOutput" runat="server" /> </form> </body> </HTML> In version 2.0, Microsoft has dropped support for the CodeBehind attribute, and, instead, substitutes the new CodeFile attribute. Here s functionally equivalent markup in 2.0. The only difference is CodeFile replaces CodeBehind. <%@ Page language="c#" CodeFile="WebForm1.aspx.cs" Inherits="WebDemo.WebForm1" %> <HTML><HEAD><title>WebForm1</title></HEAD> <body> <form id="Form1" method="post" runat="server"> <asp:Label id="Label3" runat="server">User Name</asp:Label> <asp:TextBox id="TextBox1" runat="server" /> <asp:Label id="Label2" runat="server">Password</asp:Label> <asp:TextBox id="TextBox3" runat="server" /> <asp:Button id="Button1" runat="server" Text="Login" /> <asp:Label id="lblOutput" runat="server" /> </form> </body> </HTML> Realize that version 2.0 does not support the CodeBehind attribute. This is a code breaking change that requires a conversion to move Web Forms from 1.x to 2.0. Considering that most of the changes for 2.0 are backwards compatible and require no changes to work in 2.0, this is worth noting. The code-behind file contains much more significant differences. Here is the 1.x version of the code-behind for the markup we just examined. public class WebForm1 : System.Web.UI.Page { protected System.Web.UI.WebControls.Label Label3; protected System.Web.UI.WebControls.Label Label2; protected System.Web.UI.WebControls.TextBox TextBox3; protected System.Web.UI.WebControls.Button Button1; protected System.Web.UI.WebControls.Label lblOutput; protected System.Web.UI.WebControls.TextBox TextBox1; private void Page_Load(object sender, System.EventArgs e) { // Put user code to initialize the page here } Note Because lexer rules can pass arguments, there is little need to use mutable state in a lexer simply Table 12-2 shows a comparison of the features of three alternatives useful in server-side text and/or binary file reading and manipulation.
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