Working with Data Tables in the XML Designer

In the previous section, we examined the structure of tags within a DataSet schema. Remember that we said that DataTables are defined as elements within a choice group. The DataTable itself has the following nominal structure < xs element name myTable> < xs element name Column1 type xs string > < xs element name Column2 type xs Boolean > The structure is similar to the nominal structure of a schema an element is created and assigned the name of the table. Within the element is an...

Data Binding in Web Forms

In this chapter, you'll learn how to Simple-bind controls at design time Simple-bind controls at run time Display bound data on a page Complex-bind controls at design time Complex-bind controls at run time Store a DataSet in the session state Store a DataSet in the ViewState Update a data source using a Command object In the previous eleven chapters, we've examined the ADO.NET object model, using examples in Windows forms. In this chapter, we'll examine the way that Microsoft ADO.NET interacts...

Creating XML Schema and Typed Data Sets

Like HTML and other markup languages descended from SGML, XML schema files are created using tags that are delimited by angle brackets XML schema files begin with a tag that identifies the version of XML that is being used. .NET Framework XML schema files follow this with an < xs schema> tag whose targetNamespace attribute defines the namespace of all the components in this schema and any included schemas. The < xs schema> tag also includes references to two namespaces the W3C XML...

Visual Basic NET

In the form designer, select the epDataSet ErrorProvider control. 2. In the Properties window, select the DataSource property, expand the drop-down list, and then select dsMaster1. 3. Select the DataMember property, expand the drop-down list, and then 4. Double-click the btnDataSet button. Visual Studio adds the event handler template to the code editor. 5. Add the following code to the event handler 6. This code artificially creates an error condition for the Description column of the second...

Complex Binding Control Properties

Unlike simple-bound properties, which must be bound to a single value, complex-bound control properties contain and possibly display multiple items. The most common examples of complex-bound controls are, of course, the ListBox and ComboBox, but any control property that accepts multiple values can be complex-bound. Although the techniques can vary somewhat depending on the specific control, most complex-bound controls are bound by setting the DataSource property directly rather than by adding...

Moving Through Data

Whenever performance and scalability are issues, it's important to limit the amount of data displayed on a single page. For usability reasons, you should always limit the amount of data that is displayed, no matter what the environment users don't appreciate having to wade through masses of data to find the single bit of information they require. One common technique in the Internet environment for limiting the amount of data on a single Web page is to display only a fixed number of rows and...

Using Adonet in Web Forms

In this chapter, you'll learn how to Display data in a DataGrid control Implement sorting in a DataGrid control Display data in a DataList control Display a DataList control as flowed text Implement paging in a DataGrid control Implement manual navigation in a Web form Use validation controls to control user entry In the previous chapter, we examined the basic data-binding architecture for Web forms. In this chapter, we'll examine a few common data-binding tasks in more detail. Microsoft...

Data Column Expressions

Expressions, technically DataColumn Expressions, are used by the RowFilter and Sort properties of the DataView. We've used DataColumn Expressions in previous chapters when we created a calculated column in a DataTable and when we set the sort and filter expressions for the DataTable Select method. Now it's time to examine them more closely. A DataColumn Expression is a string, and you can use all the normal string handling functions to build one. For example, you can use the amp concatena-tion...

Visual C NET

Open the Transactions project from the Visual Studio Start Page or by 2. Double-click Transactions.cs to display the form in the form designer. , .-. i i'-pir - -l-'. .v 3 to Tin cfcH'li px-Hl P j Tiwifcufl bfvi T Visual Studio opens the code editor window and adds the Click event handler. 4. Add the following code to the procedure trnNew 9. trnNew 10. strMsg Isolation Level 11. strMsg trnNew.IsolationLevel.ToString The code creates a new Transaction using the default method, and then...

Microsoft Adonet Step by Step

Riordan All rights reserved. No part of the contents of this book may be reproduced or transmitted in any form or by any means without the written permission of the publisher. Library of Congress Cataloging-in-Publication Data Riordan, Rebecca. Microsoft ADO.NET Step by Step Rebecca M. Riordan. p. cm. Includes index. ISBN 0-7356-1236-6 1. Database design. 2. Object oriented programming Computer science 3. ActiveX. I. Title. QA76.9.D26 R56 2002 005.75'85 dc21...