Tài liệu Caching Data ppt

... customersDataGrid.DataSource = ds.Tables["Customers"].DefaultView; customersDataGrid.DataKeyField = "CustomerID"; customersDataGrid.DataBind( ); } private void customersDataGrid_PageIndexChanged(object ... if(Cache["CustomersDataSet"] == null) { LoadDataSet( ); cacheStatusLabel.Text = "DataSet retrieved from database."; } else { ds...

Ngày tải lên: 26/01/2014, 10:20

... [ Team LiB ] Recipe 5.5 Deserializing Data Problem You have a DataSet that has been serialized and written to a file. You want to recreate the DataSet from this file. Solution Use the ... cast the result as a DataSet. The sample code loads a file stream containing a previously serialized DataSet in a specified format and deserializes it to recreate the original DataSet. The C# ....

Ngày tải lên: 14/12/2013, 18:16

... grid. dataGridMerge.DataSource = ds.Tables[0].DefaultView; dataGridMerge.CaptionText = "Merge Results: " + dtSource.DataSet.DataSetName + " into " + dtDest.DataSet.DataSetName; ... e) { dataGridMerge.DataSource = null; dataGridMerge.CaptionText = ""; } Discussion The Merge( ) method of the DataSet can merge a DataRow array, a DataTable, or a Data...

Ngày tải lên: 14/12/2013, 18:16

... Editing Data You have seen how to use a GridView control to fetch and browse data. The following set of exercises concentrate on deleting and modifying data using a GridView control. ... buttons for deleting and editing data. In the following exercise, you will add a Delete button to the GridView control. Create the Delete button 1. Ensure that CustomerData.aspx is displayed in...

Ngày tải lên: 15/12/2013, 00:15

... one drawback of using a DataReader is that it does not support paging. Caching Data in a Data Source A DataSet contains a copy of the data it fetches. The longer the DataSet is held, the more ... creates a DataSet. When you bind a Web Server Data control such as GridView to a data source, Visual Studio 2005 generates code that populates the DataSet and displays it in the data...

Ngày tải lên: 21/01/2014, 15:20

... Sets 89 Creating DatabaseMetaData objects A Connection object represents a database connection and also instantiates a DatabaseMetaData object with the getMetaData() method. The DatabaseMetaData object ... DriverManager.getConnection(jdbcUrl,user,pwd); //Initialize a DatabaseMetaData object DatabaseMetaData dmd = conn.getMetaData(); //Retrieve database name and version String dbname = dmd...

Ngày tải lên: 10/12/2013, 02:15

... understanding of the network from the data center to the WAN edge to the branch office. This design guide is focused on the data center. A general overview of the data center, WAN edge, and WAAS ... at the WAN edge. – Data center aggregation—ACL configuration is required because only selected traffic (WAN) traversing the data center should be optimized. Campus and data center...

Ngày tải lên: 10/12/2013, 16:16

Ngày tải lên: 11/12/2013, 13:15

... Displaying Data from a Database Overview 1 Introducing Data- Driven Web Sites 2 Demonstration: Tour of the Sample Web Site 8 Retrieving Data from a Database 10 Lab 1.1: Retrieving Data from a Database ... 10:00 Module 1: Displaying Data from a Database 10:00 10:15 Break 10:15 10:45 Lab 1.1: Retrieving Data from a Database 10:45 11:05 Module 1: Displaying Data from a D...

Ngày tải lên: 11/12/2013, 14:15

... your database. • ADO.NET DataSet is comparable in functionality to the ADO Recordset. – However, DataSet does not communicate with your database. – In order to fetch data from your database ... into a DataSet, you pass the DataSet into the Fill method of a connected ADO.NET object—the DataAdapter. .NET Data Providers • SQL Client .NET Data Provider – communicate with SQL Server d...

Ngày tải lên: 11/12/2013, 17:15