Tài liệu Counting Records in a DataReader ppt

... [ Team LiB ] Recipe 2.7 Counting Records in a DataReader Problem You want to determine how many records there are in a DataReader. Solution Use one of the following three techniques: ... determine the number of records in the result set for the DataReader without iterating through all of the records. Additionally, because the DataReader is forward-only, you...

Ngày tải lên: 24/12/2013, 05:15

... include inner joins, left outer joins, and right outer joins. Inner Join This join displays records in which at least one record exists in each table for the joined field. This means that ... Technique To find out which records (customers) don't have corresponding records (invoices) in a related table, you have to have a better understanding of the types of joins t...

Ngày tải lên: 21/01/2014, 12:20

... shown in the sample code to locate data in the table meeting user-specified criteria. The sample code contains two event handlers: Form.Load Sets up the sample by creating a DataTable containing ... File: FindDataTableRowsForm.cs // Namespaces, variables, and constants using System; using System.Configuration; using System.Data; using System.Data.SqlClient; // Table name con...

Ngày tải lên: 26/01/2014, 10:20

... the database. Using a DataGrid Control to Access a Database A DataGrid allows you to access rows in a database table. In the following sections, you'll learn how to create an ASP.NET ... create a DataSet object. You use a DataSet object to store a local copy of the information stored in the database. A DataSet object can represent database structures such...

Ngày tải lên: 24/12/2013, 01:17

... setup of the DataAdapter object. Adding a DataRow to a DataTable In this section, you'll learn how to add a DataRow to a DataTable. Before you see this, let's populate a DataSet with ... DataAdapter. Setting the InsertCommand Property of a DataAdapter The following example creates a SqlCommand object named myInsertCommand that contains an INSERT statement: SqlC...

Ngày tải lên: 24/12/2013, 01:17

... Economics Teaching Program 2003-2004 Marketing Places Lecture note Business Opportunities in a Place Phan Chanh Duong 1 Xinh Xinh/Kim Chi BUSINESS OPPORTUNITIES IN A PLACE Phan Chanh ... Duong As the saying goes: “Traveling forms a young man”, our living space widens as we know more places. For businesses, traveling is exploring opportunities. As one goes to a...

Ngày tải lên: 09/12/2013, 20:15

... schema and loads the data and schema InferSchema Ignores any inline schema and infers the schema from the XML data DiffGram Reads a DiffGram and adds the data to the current schema Fragment Reads and ... existing DataSet schema and any data that does not fit in it is discarded. If no schema exists in the DataSet, no data is loaded. Notice that an empty DataSet has no schema information....

Ngày tải lên: 10/12/2013, 14:16

... standard. Horizontal Cabling Backbone Cabling Equipment Distribution Area Racks and Cabinets Horizontal Distribution Area LAN, SAN, and KVM switches Main Distribution Area Routers, Backbone LAN/SAN ... Telecommunications, Inc. All Rights Reserved In high-bandwidth applications, signal throughput is imperative for maintaining signal integrity. • AllADCsystemsareimpedancematchedto...

Ngày tải lên: 10/12/2013, 17:15

... • Log off Windows and Log back on as Administrator, and then navigate to the Chemistry\Laboratory folder. • Try to create a file in the Laboratory folder. Was the attempt to create this file ... selecting them in the name box and clicking the Add button. Again, do so according to the chart in Step 1, then click OK. Note: Do not proceed to Step 7 until all Users & Groups hav...

Ngày tải lên: 11/12/2013, 15:15

... iBT At A Glance fr om ETS ® What is ever ybody speaking listening r eading writing about? Communicate with Confidence Listening. Learning. Leading. • A new , Internet-based ... T OEFL COMPUTER-BASED T OEFL P APER-BASED T OEFL SKILLS TESTED • Listening • Speaking • Reading • Writing • Listening • Structure (Grammar) • Reading • Writing • Listening • Structure...

Ngày tải lên: 11/12/2013, 19:15